NZ748526B2

NZ748526B2 - Novel prostaglandin derivative

Info

Publication number: NZ748526B2
Application number: NZ748526A
Authority: NZ
Inventors: Yasushi Matsumura; Hiroyoshi Nanba; Kazuyoshi Sawada; Kazuki Taguchi; Arata Yasuda
Original assignee: Agc Inc; Nippon Zoki Pharmaceutical Co Ltd
Priority date: 2016-05-09
Filing date: 2017-05-09
Publication date: 2021-02-02

Abstract

The present invention relates to: a novel prostaglandin derivative having an alkynyl group in a ω-chain, particularly a novel prostaglandin derivative having a double bond at position-2 and also having an alkynyl group in a ω-chain; and a medicine containing the compound as an active ingredient. According to the present invention, it becomes possible to provide: a compound represented by formula (1) [wherein each symbol is as defined in the description], a pharmaceutically acceptable salt of the compound, or a cyclodextrin inclusion complex of the compound or the pharmaceutically acceptable salt; and a medicine which contains the compound as an active ingredient, particularly which can be used for the prevention or treatment of a blood flow disturbance associated with spinal canal stenosis or chronic arterial occlusive disease.

Description

DESCRIPTION Title of Invention: NOVEL PROSTAGLANDIN DERIVATIVE [Technical Field] The present invention relates to a novel prostaglandin derivative having an l group on the w—chain of a prostaglandin, a pharmaceutically acceptable salt thereof, or a extrin clathrate compound thereof, particularly, a novel glandin derivative having a double bond at the 2—position of a prostaglandin and an alkynyl group on the m—chain. In addition, the present ion relates to a medicament containing at least one of the prostaglandin derivative, a pharmaceutically acceptable salt thereof, and a cyclodextrin clathrate compound thereof as an active ingredient, particularly a medicament for the prophylaxis or ent of a blood flow disorder.

[Background Art] eral arterial occlusive disease is a disease in which the artery is constricted or occluded due to arteriosclerosis and us formation, the periphery, particularly the lower limb, falls into an ischemic state, and exhibits symptoms such as cryaesthesia, intermittent claudication, pain, and ulcer or necrosis of lower limb.

Improvement of the blood flow to the ischemic part is ant for improving the lower limb ms, and treatments aiming at resuming blood circulation by drugs or physical methods are performed. Drugs having vasodilating action and platelet aggregation inhibiting action are used for drug therapy. id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3"

[0003] Peripheral vascular disease also manifests as atherosclerotic stenosis of the renal artery and can lead to renal ischemia and kidney dysfunction. Chronic diabetes can also lead to atherosclerosis and vascular complications ing large vessel, arteriole and capillary. Diabetic patients are at high risk of developing foot ulcer due to long— term cations of, for example, neuropathy and ischemia.

Spinal canal stenosis is a disease in which the spinal canal is narrowed due to hypertrophy ration of the spine and the ligamentum flavum that constitute the spinal canal and sion of the intervertebral disc, and neural tissues such as the nerve root and cauda equina are compressed and various ms are ted. Spinal canal stenosis is classified into extensive spinal canal stenosis, thoracic spinal canal stenosis, lumbar spinal canal stenosis and the like according to the narrow portion of the spinal canal. The ms thereof include o, pain in the upper limb or lower limb, numbness and the like due to nerve compression. In particular, when the cauda equina is d, lumbago, lower limb pain, numbness, weakness become severe during walking, and this symptom is called intermittent claudication. l prostaglandins (hereinafter prostaglandin is to be indicated as PG) are a group of bioactive substances synthesized in vivo, and regulate cellular functions of each tissue of the body as a topical hormone having various physiological activities. In particular, PGEls, which are one kind of natural PGs, have, for example, a vasodilating action, an angiogenesis action, a platelet aggregation suppressive action, and an epithelial regeneration promoting action. They are used as an antiplatelet agent, an agent for improving peripheral blood flow disorders and the like in the drug therapy of the above—mentioned diseases. While PGEs may be applicable to other indications, natural PGEs are extremely unstable chemically and metabolically. Thus, the development of PGE derivatives which are more stable and effective, and cause fewer side effects has been extensively studied.

A PG derivative having a double bond at the 2-position of PG and a production method thereof are ed in the following patent documents 1 — 5 and non—patent documents 1 — 2.

In addition, a PG derivative having an alkynyl group in the @— chain of PG and a production method thereof are reported in the following patent documents 6 — 7.

[Document List] [Patent nts] Patent document JP-A—50-71649 Patent document JP-A—50-116452 Patent document JP-A-52—85151 Patent‘document JP—A—53—149954 Patent document JP—A—55—100360 Patent nt JP—A—51-131860 Patent document \lmU‘Ivb-UONH JP—A—54—12352 [Non—patent documents] Non—patent document 1: Ann. Acad. N. Y. Sci., 1971, vol. 180, p. 181.

Non—patent document 2: Prostaglandins, 1974, vol. 8, p. 341.

[Summary of Invention] [Problems to be Solved by the Invention] An object of the present invention is to e a blood flow improving agent that can be administered orally, causes fewer side s, shows higher , and is superior in the effectiveness and pharmacokinetic property, especially, a compound useful as a therapeutic agent for blood flow er and pain associated with spinal canal stenosis. Among the compounds described in the aforementioned documents, particularly, (2E)—7—((1R,2R,3R)hydroxy—2—((1E,3S,5S)—3— hydroxy—S—methylnon—1-en-l—yl)-5—oxocyclopentyl)hept—2—enoic acid (limaprost) is a compound showing superior efficacy, and blood flow improving agents containing limaprost as an active ingredient are being used for the treatment of pain and thesia associated with thromboangiitis obliterans and spinal canal stenosis in the actual medical field. However, limaprost has side effects on the gastrointestinal tract, and there is still room for improvement in the blood flow increasing action and sustainability of drug efficacy. In particular, the side effect of limaprost that has a high smooth muscle contraction action and causes diarrhea is left as a problem to be solved. Therefore, the development of a PGEl tive having physiological ties similar to those of natural type, g low side effects and having high sustainability has been intensively studied in and out. r, a PG compound having a double bond at the 2— position of PG and an alkynyl group in the m-chain has not been reported. Furthermore, synthetic examples, properties, physiological ties and the like of a PGE compound having a double bond at the 2-position of PG and a triple bond at the l8—position have not been reported.

In addition, synthetic examples, properties, physiological activities and the like of a PGE compound having a triple bond at the l8—position of PG and a lkyl group on the end of the triple bond have not been reported at all.

[Means of Solving the Problems] id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11"

[0011] The present inventors have synthesized novel PG compounds and conducted studies in an attempt to clarify the properties and physiological activities. As a result, they have found that a compound represented by the following formula (1) (hereinafter sometimes to be indicated as compound (1)) or a pharmaceutically acceptable salt thereof nafter compound (1) and a pharmaceutically acceptable salt thereof are mes to be generically indicated as "the compound of the present invention"), or cyclodextrin clathrate compounds thereof have superior properties and pharmacological action, and further that they are extremely superior compounds as blood flow improving agents, especially therapeutic drugs for blood flow disorder and pain associated with spinal canal is, which resulted in the completion of the present invention.

Therefore, the t invention provides the following.

A compound represented by the following formula (1) or a pharmaceutically acceptable salt f; id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13"

[0013] wherein RA is —CH2—CZ1Z2(COX) or —CH=CZ1(COX), Z1 and 22 are each independently a hydrogen atom or a fluorine atom, X is OR4 or NR?w, R4 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms or a substituted alkyl group having 1 - 6 carbon atoms, R5 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms or a substituted alkyl group having 1 — 6 carbon atoms, R6 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms, a substituted alkyl group having 1 — 6 carbon atoms, an alkylsulfonyl group having 1 — 6 carbon atoms, a tuted alkylsulfonyl group having 1 — 6 carbon atoms, an lfonyl group having 6 _ 10 carbon atoms or a substituted arylsulfonyl group having 6 - 10 carbon atoms; Y is CH2, S or O; A—B is a carbon—carbon single bond, a carbon—carbon double bond or a carbon—carbon triple bond; a hydroxy group bonded by a wavy line is a hydroxy group having d—configuration, B—configuration or a mixed configuration of d—configuration and B—configuration; R? and R2 are each independently a hydrogen atom, an alkyl group having 1 — 3 carbon atoms or a substituted alkyl group having 1 — 3 carbon atoms; n is an integer of O — 2; R3 is an alkyl group having 1 — 4 carbon atoms, a substituted alkyl group having 1 - 4 carbon atoms, a cycloalkyl group having 3 — 6 carbon atoms, a substituted cycloalkyl group having 3 — 6 carbon atoms, an aryl group having 6 — 10 carbon atoms or a substituted aryl group having 6 — 10 carbon atoms; excluding 7-((lR,2R,3R)-3—hydroxy—2—((lE,3S,4RS)—3- hydroxy—4—methyloct—l—en—6—yn—l—yl)—5-oxocyclopentyl)heptanoic acid; the nd or a pharmaceutically acceptable salt f of [1], wherein Y is CH2; the compound or a pharmaceutically acceptable salt thereof of [l] or [2], wherein RA is —CH=CZ1(COX); the compound or a pharmaceutically acceptable salt thereof of [l] or [2], wherein RA is —CH2—CZ122(COX); the compound or a pharmaceutically able salt thereof of any of [l] — [4], wherein n is l; [6] the compound or a pharmaceutically acceptable salt thereof of any of [1] ~ [5], wherein A—B is a carbon—carbon double bond; the compound of or a pharmaceutically acceptable salt thereof any of [l] — [6], wherein R1 is a en atom and R2 is an alkyl group having 1 — 3 carbon atoms; the nd or a pharmaceutically acceptable salt thereof of any of [l] — [7], wherein R3 is an alkyl group having 2 — 3 carbon atoms or a cycloalkyl group having 3 — 5 carbon atoms; the compound or a pharmaceutically acceptable salt thereof of any of [l] — [8], wherein R3 is a cycloalkyl group having 3 — 5 carbon atoms; the compound or a pharmaceutically able salt thereof of any of [l] — [9], wherein X is 0R4; [ll] a cyclodextrin clathrate compound of the compound of any of [l] — [10] or a pharmaceutically acceptable salt thereof; a medicament comprising the compound or a pharmaceutically acceptable salt thereof of any of [1] — [10], or the cyclodextrin clathrate compound of [11] as an active ingredient; the medicament of [12], which is a prophylactic or therapeutic agent for a blood flow disorder; the medicament of [13], wherein the blood flow disorder is a blood flow disorder of nerve; the ment of [14], wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis; the medicament of [13], wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; the medicament of [16], wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary hypertension; the medicament of [16], wherein the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; the medicament of [16], wherein the blood flow er of brain is a blood flow disorder associated with suppression of recurrence after cerebral infarction; a method for prophylaxis or treatment of a blood flow disorder, sing administering an effective amount of the nd or a pharmaceutically acceptable salt thereof of any of [1] — [10], or the cyclodextrin clathrate compound of [11] to a t in need thereof; the method of [20], wherein the blood flow disorder is a blood flow disorder of nerve; the method of [21], wherein the blood flow disorder of nerve is a blood flow disorder ated with spinal canal stenosis; the method of [20], wherein the blood flow disorder is a blood flow disorder of peripheral , skin or brain; the method of [23], wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary hypertension; the method of [23], wherein the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; the method of [23], wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral tion; the compound or a pharmaceutically acceptable salt thereof of any of [l] - [10], or the cyclodextrin clathrate compound of for use in the treatment of a blood flow er; id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28"

[28] the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of [27], n the blood flow disorder is a blood flow disorder of nerve; the compound or a ceutically acceptable salt f, or the cyclodextrin clathrate compound for use of [28], wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis; the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of [27], wherein the blood flow er is a blood flow disorder of peripheral artery, skin or brain; the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of [30], wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary ension; the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of [30], n the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33"

[33] the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of [30], wherein the blood flow er of brain is a blood flow disorder associated with ssion of recurrence after cerebral infarction; id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34"

[34] use of the compound or a pharmaceutically acceptable salt thereof of any of [1] - [10], or the cyclodextrin clathrate compound of [11] in the manufacture of a prophylactic or therapeutic agent for a blood flow disorder; the use of [34], wherein the blood flow disorder is a blood flow disorder of nerve; the use of [35], wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis; the use of [34], wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38"

[38] the use of [37], wherein the blood flow disorder of peripheral artery is a blood flow disorder ated with c al occlusion or pulmonary hypertension; the use of [37], wherein the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40"

[40] the use of [37], wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral tion and the like. [0013a] In a particular , the t invention provides a compound represented by the following formula (1) or a pharmaceutically acceptable salt thereof; wherein RA is -CH2-CZ 1Z2(COX) or -CH=CZ1(COX), Z1 and Z2 are each independently a hydrogen atom or a fluorine atom, X is OR4 or NR 5R6, R4 is a hydrogen atom, an alkyl group having 1 - 6 carbon atoms or a substituted alkyl group having 1 - 6 carbon atoms, R5 is a hydrogen atom, an alkyl group having 1 - 6 carbon atoms [FOLLOWED BY PAGE 9a] or a substituted alkyl group having 1 - 6 carbon atoms, R6 is a hydrogen atom, an alkyl group having 1 - 6 carbon atoms, a substituted alkyl group having 1 - 6 carbon atoms, an alkylsulfonyl group having 1 - 6 carbon atoms, a substituted alkylsulfonyl group having 1 - 6 carbon atoms, an arylsulfonyl group having 6 - 10 carbon atoms or a substituted arylsulfonyl group having 6 - 10 carbon atoms; Y is CH2, S or O; A-B is a carbon-carbon single bond or a carbon-carbon double bond; a hydroxy group bonded by a wavy line is a hydroxy group having a-configuration, iguration or a mixed configuration of a-configuration and ß-configuration; R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 - 3 carbon atoms or a substituted alkyl group having 1 - 3 carbon atoms; n is an integer of 0 - 2; R3 is an alkyl group having 2 - 3 carbon atoms or a cycloalkyl group having 3 - 5 carbon atoms; the substituent of the tuted alkyl group having 1 - 6 carbon atoms or the substituted alkyl group having 1 - 3 carbon atoms is selected from the group consisting of halogen atom, hydroxy group, alkoxy group, halogenated alkoxy group, acyl group, acyloxy group, halogenated y group, alkylsulfonyloxy group, halogenated alkylsulfonyloxy group, arylsulfonyloxy group, arylsulfonyloxy group substituted nated alkyl group, alkoxycarbonyloxy group, amino group, substituted amino group, aryl group and heterocyclic group; the substituent of the substituted alkylsulfonyl group having 1 - 6 carbon atoms is halogen atom; the substituent of the substituted arylsulfonyl group having 6 - 10 carbon atoms is selected from the group consisting of halogen atom, alkyl group, halogenated alkyl group, and alkoxy group; [FOLLOWED BY PAGE 9b] the substituent of the substituted amino group is selected from the group consisting of alkyl group having 1 - 6 carbon atoms, alkoxy group having 1 - 6 carbon atoms, alkenyl group having 2 - 6 carbon atoms, alkynyl group having 2 - 6 carbon atoms, aryl group having 6 - 10 carbon atoms, lent heterocyclic group, aralkyl group having 7 - 14 carbon atoms, benzhydryl group, trityl group, acyl group and tri-organosilyl group, and when the substituent of the substituted amino group is a group containing a hydrogen atom, one or more of the hydrogen atoms may be further substituted by a substituent selected from the group consisting of halogen atom, alkyl group having 1 - 6 carbon atoms, alkoxy group having 1 - 6 carbon atoms, alkoxycarbonyl group having 1 - 6 carbon atoms, cyano group and nitro group.

[Effect of the Invention] The nd of the t invention has a very potent suppressive action on platelet aggregation in human and rat, and a superior blood flow increasing action when intravenously administered to rat in a cauda equine blood flow test. Thus, the compound is useful as a prophylactic or therapeutic agent for blood flow ers.

In addition, the compound of the present invention is less susceptible to oxidative metabolism by PG dehydrogenase and has high metabolic stability since an alkyl group (particularly a methyl group) is bonded to the 16-position carbon atom nt to the 15-position hydroxy group of the PG skeleton. Consequently, the compound has a long half-life in blood and can in the effective blood concentration for a long time as compared to natural type PG compounds. The ed metabolic stability can markedly improve [FOLLOWED BY PAGE 10] bioavailability of a drug containing the compound of the present invention.

[Description of Embodiments] The definition of each symbol in the a (1) is described in detail below.

For naming of the compounds in the present specification, the IUPAC nomenclature is used in principle. To indicate the position of the PG skeleton, numerical numbering based on the prostanoic acid skeleton may sometimes be indicated as appropriate. In the present specification, a group in which a hydrogen atom of the alkyl group is substituted is also ted as a substituted alkyl group. r indication is adopted for other groups as well. The "lower" means that the carbon number is 1 - 6, and 1 - 4 is preferable.

The "alkyl group" may be a linear chain or a branched chain. The alkyl group is ably an alkyl group having 1 — 6 carbon atoms, particularly preferably an alkyl group having 1 — 4 carbon atoms. Examples of the alkyl group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec—butyl group, tert—butyl group, pentyl group, hexyl group.

The "alkenyl group" may be a linear chain or a branched chain. The alkenyl group is preferably an l group having 2 — 6 carbon atoms. Examples of the l group include vinyl group, allyl group, 1—propenyl group, isopropenyl group, 3—butenyl group, 3—pentenyl group, 4—hexenyl group and the like. id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18"

[0018] The "alkynyl group" may be a linear chain or a branched chain. The alkynyl group is preferably an alkynyl group having 2 — 6 carbon atoms. Examples of the l group include ethynyl group, 1—propynyl group, 2—propynyl group, 3—butynyl group, 3—pentynyl group, 4—hexynyl group and the like.

The "alkoxy group" is a group in which an oxygen atom is bonded to the terminal carbon atom of the alkyl group. The alkoxy group may be a linear chain or a branched chain. The alkoxy group is preferably an alkoxy group having 1 - 6 carbon atoms, and ularly preferably an alkoxy group having 1 - 4 carbon atoms. Examples of the alkoxy group include methoxy group, ethoxy group, propoxy group, butoxy group and the like.

The "halogen atom" is a ne atom, a chlorine atom, a bromine atom, or an iodine atom.

The "aryl group" is an aromatic hydrocarbon group, preferably an aryl group having 6 - 18 carbon atoms, particularly preferably an aryl group having 6 - 10 carbon atoms. Examples of the aryl group include phenyl group, naphthyl group, l group and the like, and phenyl group is particularly preferable.

The "aralkyl group" is an alkyl group to which an aryl group is bonded. The aryl group of the aralkyl group is preferably an aryl group having 6 - 10 carbon atoms, particularly ably a phenyl group. The alkyl group of the aralkyl group is preferably an alkyl group having 1 - 4 carbon atoms. Examples of the aralkyl group include benzyl group, benzhydryl group, trityl group, phenylethyl group and the like.

The "cycloalkyl group" is a cyclic alkyl group having a ring with three or more members, preferably a 3- to 6-membered cycloalkyl group. Examples of the cycloalkyl group include cyclopropyl group, utyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group and the like.

The "alkylsulfonyl group" is a monovalent group in which —S(O)2— is bonded to the terminal carbon atom of the alkyl group. The carbon number of the alkyl group of the alkylsulfonyl group is preferably 1 to 6. Examples of the alkylsulfonyl group include methanesulfonyl group, ethanesulfonyl group, propanesulfonyl group, butanesulfonyl group, pentanesulfonyl group, hexanesulfonyl group and the like.

The "arylsulfonyl group" is a monovalent group in which — S(O)2— is bonded to the binding end of the aryl group. As the aryl group of the arylsulfonyl group, a group having 6 — 10 carbon atoms is preferable, and a group similar to the aforementioned aryl group is preferable. -Examples of the arylsulfonyl group include an arylsulfonyl group having 6 — 10 carbon atoms such as esulfonyl group, 1— naphthalenesulfonyl group, and 2—naphthalenesulfonyl group, and benzenesulfonyl group is able.

The "acyl group" is a monovalent group obtained by removing a hydroxy group from the carboxy group of ylic acid. As the carboxylic acid, carboxylic acid having 1 — 10 carbon atoms is preferable, formic acid, ted tic carboxylic acid (e.g., alkylcarboxylic acid such as acetic acid, propionic acid, and butyric acid), rated aliphatic carboxylic acid (e.g., alkenylcarboxylic acid such as acrylic acid), carbocyclic carboxylic acid, heterocyclic carboxylic acid and the like can be ned.

Examples of the carbocyclic carboxylic acid include saturated cyclic aliphatic carboxylic acid (e.g., cycloalkylcarboxylic acid such as cyclopropylcarboxylic acid, cyclopentylcarboxylic acid, and cyclohexylcarboxylic acid), unsaturated cyclic aliphatic carboxylic acid (e.g., cycloalkenylcarboxylic acid such as cyclohexenylcarboxylic acid) and aromatic carboxylic acid. The aromatic carboxylic acid is a compound in which the aforementioned aryl group is bonded to a carboxy group and, for example, arylcarboxylic acid such as benzoic acid and naphthylcarboxylic acid can be mentioned. The heterocyclic carboxylic acid is a compound in which a heterocyclic group is bonded to the carboxy group.

The "heterocyclic group" is preferably a 3- to 10— membered lent ted or unsaturated heterocyclic group containing at least one hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom.

Examples of the 3- to lO—membered saturated or unsaturated heterocycle include ine, azetidine, pyrrole, pyrroline, pyrrolidine, imidazole, imidazoline, imidazolidine, pyrazole, pyrazoline, pyrazolidine, pyridine, piperidine, pyrazine, piperazine, pyrimidine, zine, thiazole, thiazoline, thiazolidine, isothiazole, isothiazoline, isothiazolidine, oxazole, oxazoline, oxazolidine, isoxazole, isoxazoline, olidine, morpholine, azepane, e and the like.

In the present specification, substitution of one or more hydrogen atoms in a group with a n atom is called halogenation. For example, a halogenated alkoxy group is a group in which one or more hydrogen atoms of an alkoxy group is/are substituted by a halogen atoma The same applies to other groups. As the halogen atom, a fluorine atom or a chlorine atom is preferable.

A preferable example of the halogenated group having a halogenated alkyl group in its structure is a halogenated lower alkyl group, and fluoromethyl group, romethyl group, trifluoromethyl group, trifluoroethyl group, pentafluoroethyl group, chloromethyl group, ethyl group and the like can be mentioned.

The "alkoxyalkyl group" is an alkyl group in which one of the hydrogen atoms in the alkyl group is substituted by an alkoxy group. The alkoxy group in the alkoxyalkyl group is preferably an alkoxy group having 1 — 4 carbon atoms. The alkyl group in the alkoxyalkyl group is preferably an alkyl group having 1 - 4 carbon atoms. The carbon number of the alkoxyalkyl group is preferably 2 to 6, more preferably 2 to 4.

Examples of the alkoxyalkyl group e methoxymethyl group, ethoxymethyl group, propoxymethyl group, ethoxyethyl group and the like.

The "hydroxyalkyl group" is a group in which one or more hydrogen atoms in the alkyl group is/are tuted by a hydroxy group. The carbon number of the hydroxyalkyl group is preferably 2 to 6. The number of hydroxy groups of the hydroxyalkyl group is preferably one. es of the hydroxyalkyl group include 2-hydroxyethyl group, 3- hydroxypropyl group, 2-hydroxypropyl group, 4-hydroxybutyl group and the like.

The "alkoxycarbonyl group" is a group in which the aforementioned alkoxy group is bonded the carbonyl group. The carbonyl group is ably an alkoxycarbonyl group in which an alkoxy group having 1 - 6 carbon atoms is bonded to a yl group. Examples of the alkoxycarbonyl group include methoxycarbonyl group, ethoxycarbonyl group, n-propoxycarbonyl group, isopropoxycarbonyl group, n-butoxycarbonyl group, tbutoxycarbonyl group, ycarbonyl group and the like. id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32"

[0032] The substituted alkyl group is a group in which one or more hydrogen atoms of the alkyl group is/are substituted by a substituent(s). Examples of the substituent include halogen atom, hydroxy group, alkoxy group, halogenated alkoxy group, acyl group, acyloxy group, halogenated acyloxy group, alkylsulfonyloxy group, halogenated alkylsulfonyloxy group, arylsulfonyloxy group, arylsulfonyloxy group substituted halogenated alkyl group, alkoxycarbonyloxy group, amino group, substituted amino group, aryl group, heterocyclic group and the like, with preference given to halogen atom, hydroxy group or alkoxy group.

The substituted cycloalkyl group is a group in which one or more hydrogen atoms in the cycloalkyl group is/are substituted by a substituent(s). Examples of the substituent include alkyl group, halogenated alkyl group, n atom, hydroxy group, alkoxy group, nated alkoxy group, acyloxy group, halogenated acyloxy group, alkylsulfonyloxy group, halogenated alkylsulfonyloxy group, arylsulfonyloxy group, halogenated arylsulfonyloxy group, arylsulfonyloxy group substituted by alkyl, alkoxycarbonyloxy group and the like, with preference given to alkyl group, halogen atom or alkoxy group.

Examples of the substituted cycloalkyl group include 2— methylcyclopropyl group, 2,2—dimethylcyclopropyl group, 2— fluorocyclopropyl group, 2—methylcyclobutyl group, 2,2— dimethylcyclobutyl group, 2—methylcyclopentyl group, 2— methylcyclohexyl group and the like.

The substituted aryl group is a group in which one or more hydrogen atoms of the aryl group is/are substituted by a substituent(s). The tuent of the substituted aryl group is halogen atom, alkyl group, halogenated alkyl group, hydroxy group, alkoxy group, nated alkoxy group, alkylenedioxy group having 1 - 3 carbon atoms (e.g., methylenedioxy group and ethylenedioxy group) or the like, with preference given to halogen atom, alkyl group, halogenated alkyl group, or alkoxy group.

Examples of the substituted aryl group include mono— halophenyl group (e.g., l—, 2— or 3—chlorophenyl group, 1—, 2— or rophenyl group, and l—, 2— or 3—bromophenyl group), (halogenated phenyl group (e.g., l—, 2— or 3— trifluoromethylphenyl group), and phenyl group (e.g., 1—, 2— or 3—methoxyphenyl group and 1—, 2— or 3—ethoxyphenyl group). id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35"

[0035] The substituted alkylsulfonyl group is a group in which one or more hydrogen atoms of the alkylsulfonyl group is/are substituted by a substituent(s). As the substituent of the substituted alkylsulfonyl group, a halogen atom is preferable.

Examples of the substituted ulfonyl group include trifluoromethanesulfonyl group, pentafluoroethanesulfonyl group and the like.

The substituted arylsulfonyl group is a group in which one or more hydrogen atoms of the arylsulfonyl group is/are substituted by a substituent(s). The substituent of the substituted arylsulfonyl group is preferably halogen atom, alkyl group, halogenated alkyl group, or alkoxy group.

Examples of the substituted arylsulfonyl group include monohalogenated phenylsulfonyl group (e.g., l—, 2— or 3— chlorobenzenesulfonyl group, 1—, 2— or 3—fluorobenzenesulfonyl group, and l—, 2— or 3—bromobenzenesulfonyl group), (alkyl)phenylsulfonyl group (e.g., enesulfonyl , (halogenated alkyl)phenylsulfonyl group (e.g., trifluoromethylbenzenesulfonyl group) and (alkoxy)phenyl group (e.g., methoxybenzenesulfonyl group and ethoxybenzenesulfonyl group).

The substituted amino group is a group in which one or two en atoms of the amino group is/are substituted. When two hydrogen atoms of the amino group are substituted by substituents, the substituents may be the same or different.

Examples of the substituent of the substituted amino group include the amino-protecting groups described in e’s/Protective/Groups/in/Organic/Synthesis 4th n" (P. G. M. Wuts, T. W. Greene, J. Wiley & Sons, 2007) and the like. Specifically, alkyl group having 1 — 6 carbon atoms, alkoxy group having 1 — 6 carbon atoms, alkenyl group having 2 — 6 carbon atoms, l group having 2 — 6 carbon atoms, aryl group having 6 - 10 carbon atoms, monovalent heterocyclic group, aralkyl group having 7 — 14 carbon atoms, benzhydryl group, trityl group, acyl group, tri—organosilyl group and the like can be mentioned. When the aforementioned substituent is a group ning a hydrogen atom, one or more of the hydrogen atoms may be further substituted by a tuent(s) (hereinafter to be indicated as substituent 2). As the substituent 2, halogen atom, alkyl group having 1 — 6 carbon atoms, alkoxy group having 1 - 6 carbon atoms, alkoxycarbonyl group having 1 — 6 carbon atoms, cyano group, nitro group and the like can be mentioned. es of the substituent of the substituted amino group include methyl group, ethyl group, pyl group, benzyl group, phenyl group, pyridyl group, methoxy group, acetyl group, trifluoroacetyl group, pivaloyl group, benzoyl group, naphthoyl group, tert—butoxycarbonyl group, 2,2,2— trichloroethoxycarbonyl group, benzyloxycarbonyl group, 9— fluorenylmethyloxycarbonyl group, benzhydryl group, trityl group, phthaloyl group, allyloxycarbonyl group, methanesulfonyl group, trifluoromethanesulfonyl group, p-toluenesulfonyl group, o—nitrobenzenesulfonyl group, trimethylsilylethoxycarbonyl group, dimethylcarbamoyl group and the like.

In the compound of the present invention, when the tuent is a group ed from alkyl group, halogenated alkyl group, alkoxy group and halogenated alkoxy group, or a group having the selected group as a partial structure, the selected group is preferably a lower group.

In compound (1) of the present invention, RA in the d— chain is -CH2-CZ122(COX) or -CH=CZ1(COX). That is, compound (1) is a compound represented by the following formula (ml) or the following formula (Q2).

CHQCZ7ZZCCQX): R‘ R2 «*R' .1 2 (€ch ., (CHM OH (‘31) ?H=CZl COX.( ) 0" Y'x/ H6 1 v (:12) Both Z1 and Z2 in compound (al) are ably en atoms or fluorine atoms.

The configuration of the group bonded to the double bond of the CH=CZ1(COX) moiety of compound (d2) may be E or Z. When Z1 is a hydrogen atom, E is preferable, and when Z1 is a fluorine atom, Z is preferable.

Furthermore, compound (al) is preferably compound (dl—l) or compound (ml—2), and compound (d2) is preferably compound (d2—1) or (d2—2). (aim?) (ai—Z) (1 a 21-281) (1 6.23—-:2') In the aforementioned formulas, X is OR4 or NR??, preferably 0R4. R4 of OR4 is preferably a hydrogen atom, an alkyl group having 1 - 4 carbon atoms or a substituted alkyl group having 1 — 4 carbon atoms. As the substituent, hydroxy group, acyl group, acyloxy group, alkoxycarbonyloxy group, tuted amino group, aryl group, heterocyclic group and the like can be mentioned, and acyl group and heterocyclic group are particularly preferable.

A compound in which X is OR4 and R4 is an alkyl group having 1 — 6 carbon atoms or a substituted alkyl group having 1 — 6 carbon atoms can also be led from.a compound in which the COX moiety (i.e., CO?? moiety) has a structure that produces a prodrug of ylic acid. ic examples of R4 include hydrogen atom, methyl group, ethyl group, n-propyl group, isopropyl group, n—butyl group, isobutyl group, sec—butyl group, tert—butyl group, benzyl group, pivaloylmethyl group, (5-methyl—2—oxo—1,3—dioxol— 4—yl)methyl group, 2—hydroxyethyl group, 2-(dimethylamino)ethyl group, 2—(morpholino)ethyl group, 4—pyridylmethyl group, pivaloyloxymethyl group, l—{[(l— cyclohexyloxy)carbonyl]oxy}ethyl group and the like. Preferred are hydrogen atom, alkyl group having 1 — 4 carbon atoms (e.g., methyl group and ethyl group), pivaloylmethyl group, and (5— methyl—2-oxo—l,3—dioxol—4—yl)methyl group, and particularly preferred are hydrogen atom, methyl group and ethyl group.

R5 when X is NR5R6 is a hydrogen atom, an alkyl group having 1 - 6 carbon atoms or a tuted alkyl group having 1 - 6 carbon atoms. es of the alkyl group having 1 — 6 carbon atoms include methyl group, ethyl group, n—propyl group, isopropyl group, n-butyl group, isobutyl group, sec—butyl group, tert—butyl group and the like. R5 is preferably a hydrogen atom, a methyl group, an ethyl group or the like.

R6 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms, a substituted alkyl group having 1 - 6 carbon atoms, an ulfonyl group having 1 — 6 carbon atoms, a substituted alkylsulfonyl group having 1 — 6 carbon atoms, an arylsulfonyl group having 6 — 10 carbon atoms or a substituted arylsulfonyl group having 6 — 10 carbon atoms.

When R6 is an alkyl group having 1 — 6 carbon atoms or a tuted alkyl group having 1 — 6 carbon atoms, examples thereof include lower alkyl group such as methyl group, ethyl group, n—propyl group, isopropyl group, n—butyl group, isobutyl group, sec—butyl group, and tert—butyl group, hydroxyalkyl group such as 2—hydroxyethyl group, 3—hydroxypropyl group, 2— ypropyl group, and 2,3—dihydroxypropyl group, and the like.

When R6 is an alkylsulfonyl group having 1 — 6 carbon atoms or a substituted alkylsulfonyl group having 1 — 6 carbon atoms, examples thereof e methanesulfonyl group, ethanesulfonyl group and the like. Examples of the arylsulfonyl group having 6 — 10 carbon atoms or a substituted arylsulfonyl group having 6 — 10 carbon atoms include phenylsulfonyl group, p-toluenesulfonyl group and the like.

R5 is ably a hydrogen atom, a methyl group, an ethyl group, a hydroxyethyl group, a methanesulfonyl group, an ethanesulfonyl group or the like.

The structure of the moiety expressed by A—B shows that the ArB structure is a carbon—carbon single bond (i.e., —CH2- CH2-), a carbon—carbon double bond (i.e., —CH=CH—), or a carbon—carbon triple bond (i.e., ~CEEC—). The structure of the A-B moiety is preferably a —carbon single bond or a carbon-carbon double bond, and the configuration of the group bonded to the double bond is preferably E.

The hydroxy group bonded by a wavy line shows that the orientation of the bond of the hydroxy group is d—configuration (binding downward on the paper surface), B—configuration (binding upward on the paper surface) or a mixed configuration of d-configuration and B-configuration. The configuration of the y group is preferably iguration, or a mixed configuration of d-configuration and B-configuration, particularly preferably d—configuration.

Y is CH2, S or 0, preferably CH2 or S, particularly preferably CH2.

In the ure shown by (CH?n, n is the number of methylene units. When n is O, the methylene unit is absent.

In this case, the carbon atom to which R1 and R2 are bonded, and the carbon atom of the triple bond are directly bonded to each other. n is preferably 1 or 2, particularly preferably 1.

R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 — 3 carbon atoms or a substituted alkyl group having 1 - 3 carbon atoms. It is preferable that one of R4 and R2 is a hydrogen atom and the other is an alkyl group having 1 — 2 carbon atoms (preferably a methyl group), or R1 and R2 are alkyl groups having 1 — 2 carbon atoms (preferably a methyl group). It is more preferable that R1 is a hydrogen atom and R2 is an alkyl group having 1 — 2 carbon atoms, and particularly ably, R1 is a hydrogen atom and R2 is a methyl group.

R3 is an alkyl group having 1 ~ 4 carbon atoms, a substituted alkyl group having 1 — 4 carbon atoms, a cycloalkyl group having 3 — 6 carbon atoms, a substituted cycloalkyl group having 3 — — 6 carbon atoms, an aryl group having 6 10 carbon atoms or a substituted aryl group having 6 — 10 carbon atoms.

It is preferably an alkyl group having 1 — 4 carbon atoms or a cycloalkyl group having 3 — 6 carbon atoms, particularly preferably an alkyl group having 2 — 4 carbon atoms or a cycloalkyl group having 3 — 6 carbon atoms, further ably an alkyl group having 2 - 3 carbon atoms or a cycloalkyl group having 3 — 5 carbon atoms, especially preferably a lkyl group having 3 - 5 carbon atoms. Specific examples of R3 include ethyl group, n—propyl group, isopropyl group, cyclopropyl group, cyclobutyl group, cyclopentyl group, phenyl group and the like. Ethyl group, cyclopropyl group or cyclobutyl group is able, and cyclopropyl group is particularly preferable. id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46"

[0046] In compound (1) of the t invention, a compound wherein w-chain has the following structure is preferable.

[Compound (w—1)] OH (mm ‘ The symbols in the formula (m—l) have the same meanings as in the formula (1).

It is preferable that Y is CH2 or S, R1 is a hydrogen atom, R2 is an alkyl group having l — 2 carbon atoms, R3 is an alkyl group having 1 — 4 carbon atoms (preferably an alkyl group having 2 — 3 carbon atoms) or a lkyl group having 3 — 6 carbon atoms (preferably a cycloalkyl group having 3 — 5 carbon atoms), X is 0R4, R4 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms or a substituted alkyl group having 1 — 6 carbon atoms. Note that 7—((1R,2R,3R)-3—hydroxy—2— ((1E,38,4RS)—3—hydroxy—4—methyloct-1—enyn—1-yl)-5— oxocyclopentyl)heptanoic acid is excluded from compound (w-l).

Furthermore, the substituent of the substituted alkyl group having 1 — 6 carbon atoms is preferably a group selected from hydroxy group, acyl group, acyloxy group, alkoxycarbonyloxy group, substituted amino group, aryl group and cyclic group. id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49"

[0049] As compound (1) of the present invention, a compound n the structure of d—chain and m—chain is the ing structure is preferable from the aspects of pharmacological activity and property.

[Compound (m—10)] The s in the formula (?-10) have the same meanings as in the formula (1). R30 is an alkyl group having 1 - 4 carbon atoms rably an alkyl group having 2 - 3 carbon atoms), or a cycloalkyl group having 3 - 6 carbon atoms (preferably a cycloalkyl group having 3 - 5 carbon atoms).

It is preferable that R1 is a hydrogen atom, R2 is an alkyl group having 1 - 2 carbon atoms, X is OR4, and R4 is a hydrogen atom or an alkyl group having 1 - 4 carbon atoms.

[Compound (?-11)] The s in the formula (?-11) have the same meanings as in the formula (1). R30 is an alkyl group having 1 - 4 carbon atoms (preferably an alkyl group having 2 - 3 carbon atoms), or a cycloalkyl group having 3 - 6 carbon atoms (preferably a cycloalkyl group having 3 - 5 carbon atoms).

It is preferable that R1 is a hydrogen atom, R2 is an alkyl group having 1 - 2 carbon atoms, X is OR4, and R4 is a hydrogen atom or an alkyl group having 1 - 4 carbon. Both Z1 and Z2 are preferably hydrogen atoms or fluorine atoms.

Preferable compounds (1) are shown below.

[Compound (l)—A] , Vnga . Ca? VH5 CH '(1.)-A In the formula (l)—A, the configuration of a hydroxy group bonded by a wavy line is d-configuration, iguration, or a mixed uration of d—configuration and B—configuration, Y is CH2, S or O, R1 is preferably a hydrogen atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R3 is preferably an alkyl group having 1 - 4 carbon atoms or a cycloalkyl group having 3 — 6 carbon atoms, RA is —CH2— CZ122(COX) or —CH=CZ1(COX), Z1 and Z2 are each independently a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is preferably a hydrogen atom, an alkyl group having 1 — 6 carbon atoms, or an alkyl group having 1 - 6 carbon atoms substituted by a substituent(s) ed from the group consisting of a hydroxy group, an acyl group, an acyloxy group, an alkoxycarbonyloxy group, a substituted amino group, an aryl group and a heterocyclic group. When RA is —CH=CZ1(COX), the configuration of the group bonded to the double bond may be E or Z, when Z1 is a hydrogen atom, E is preferable, and when Z1 is a fluorine atom, Z is preferable. Note that 7-((lR,2R,3R)hydroxy—2— 8,4RS)—3—hydroxy—4—methyloct—l~en—6-yn—l—yl)—5— oxocyclopentyl)heptanoic acid is excluded. id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61"

[0061] [Compound (l)—B] In the formula (l)—B, the configuration of a hydroxy group bonded by a wavy line is d—configuration, B—configuration, or a mixed configuration of d—configuration and B—configuration, Y is preferably CH2 or S, R? is preferably a hydrogen atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R3 is preferably an alkyl group having 2 — 3 carbon atoms or a lkyl group having 3 — 5 carbon atoms, RA is —CH2— CZ1Z2(COX) or —CH=CZ1(COX), Z1 and Z2 are each ndently a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is preferably a hydrogen atom, an alkyl group having 1 — 6 carbon atoms, or an alkyl group having 1 — 6 carbon atoms substituted by a substituent(s) selected from the group consisting of a hydroxy group, an acyl group, an acyloxy group, an alkoxycarbonyloxy group, a substituted amino group, an aryl group and a heterocyclic group. When RA is 1(COX), the configuration of the group bonded to the double bond may be E or Z, when Z1 is a hydrogen atom, E is preferable, and when Z1 is a fluorine atom, Z is preferable.

[Compound (l)—C] id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65"

[0065] OH ('1 )4: In the formula (l)-C, the configuration of a hydroxy group bonded by a wavy line is iguration, B—configuration, or a mixed configuration of d-configuration and B—configuration, R} is preferably a en atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R3 is preferably an alkyl group having 2 — 3 carbon atoms, Z1 is a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is preferably a hydrogen atom or an alkyl group having 1 ~ 4 carbon atoms.

[Compound (1)—D] HO‘ 50H (1%0 id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69"

[0069] In the formula (l)—D, the configuration of a hydroxy group bonded by a wavy line is iguration, B—configuration, or a mixed configuration of d—configuration and B—configuration, R1 is preferably a hydrogen atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R? is preferably a cycloalkyl group having 3 - 5 carbon atoms, Z1 is a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is preferably a hydrogen atom or an alkyl group having 1 - 4 carbon atoms.

[Compound (1)—E] OH (1)42 In the formula (l)—E, the configuration of a hydroxy group bonded by a wavy line is d—configuration, B—configuration, or a mixed configuration of d—configuration and B—configuration, R1 is preferably a hydrogen atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R3 is preferably an alkyl group having 2 — 3 carbon atoms, Z1 and Z2 are each independently a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is ably a en atom or an alkyl group having 1 — 4 carbon atoms.

[Compound (l)—F] id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74"

[0074] OH (1)4: In the formula (l)-F, the configuration of a hydroxy group bonded by a wavy line is d-configuration, B—configuration, or a mixed configuration of d—configuration and B—configuration, R1 is preferably a hydrogen atom, R2 is preferably an alkyl group having 1 — 2 carbon atoms, R3 is preferably a cycloalkyl group having 3 — 5 carbon atoms, Z1 and Z2 are each independently a hydrogen atom or a fluorine atom, X is preferably 0R4, and R4 is preferably a hydrogen atom or an alkyl group having 1 — 4 carbon atoms.

Particularly preferable examples of compound (1) e the following compounds.

Methyl 4—((2—((lR,2R,3R)—3—hydroxy—2—((lE,3RS,4S)—3— hydroxy—4—methylnon—l—en-6—yn—l—yl)-5— lopentyl)ethyl)thio)butanoate [compound (l)—l], methyl (2E)—4—((2-((lR,2R,3R)—3—hydroxy—2—((lE,3RS,4S)—3— hydroxy—4—methylnon—l—en—6—yn—l—yl)—5— oxocyclopentyl)ethyl)thio)but—2—enoate [compound (l)—2], methyl ((lR,2R,3R)—3—hydroxy—2—((lE,3RS,4S)—3—hydroxy—4— methylnon—l—en—6—yn—l—yl)—5—oxocyclopentyl)heptanoate und (l)-3], (5—methyl—2—oxo—l,3—dioxol—4—yl)methyl 7—((lR,2R,3R)—3— hydroxy—2—((lE,3S,4S)—3—hydroxy—4—methylnon—1—en—6—yn—l—yl)—5— oxocyclopentyl)heptanoate [compound (l)—4], 3,3—dimethyl—2—oxobutyl 7—((1R,2R,3R)—3—hydroxy—2— ((lE,3S,4S)—3—hydroxy—4—methylnon—l—en—6—yn—l—yl)—5— oxocyclopentyl)heptanoate [compound (l)—5], 7—((lR,2R,3R)—3—hydroxy—2—((lE,3S,4S)—3—hydroxy methylnon-l—en—6—yn—l—yl)—5—oxocyclopentyl)heptanoic acid [compound (l)—6], (2E)((lR,2R,3R)—3—hydroxy-2—((lE,3S,4S)-3—hydroxy—4— non—l—en—6—yn—l—yl)—5—oxocyclopentyl)hept—Z—enoic acid [compound (l)~7], fluoro—7—((1R,2R,3R)—3—hydroxy—2—((1E,3S,4S)—3— hydroxy—4-methylnon—l—en—6—yn—l—yl)—5—oxocyclopentyl)heptanoic acid [compound (l)—8], 7-((1R,2R,3R)((1E,38,4S)—7-cyclopropyl—3—hydroxy—4— Hethylhept—l—en—6-yn—l—yl)-3—hydroxy—5—oxocyclopentyl)heptanoic acid [compound (l)-9], and (2E)—7—((lR,2R,3R)—2—((lE,3S,4S)—7—Cyclopropyl—3—hydroxy— 4—methylhept—l—en—6—yn—l—yl)—3—hydroxy—5—oxocyclopentyl)hept—2— enoic acid [compound (l)—10]. id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77"

[0077] The compound of the present invention may be a pharmaceutically acceptable salt of compound (1). The salt is a salt of a ylic acid moiety with a basic substance (nontoxic inorganic base or nontoxic organic base), and has a structure in which the carboxylic acid moiety is —C00‘ and the hydrogen atom of the carboxylic acid is a cation.

The pharmaceutically acceptable salt is, for example, a salt derived from a nontoxic inorganic base or a salt derived from a ic organic base, and a salt derived from a nontoxic inorganic base is preferable.

Examples of the base derived from an inorganic salt e sodium salt, potassium salt, calcium salt, magnesium salt, zinc salt, aluminum salt, ammonium salt and the like, as well as m salt, copper salt, ferric salt, ferrous salt, manganese salt, manganous salt and the like, and sodium salt, potassium salt, calcium salt, magnesium salt and ammonium salt are preferable, and sodium salt and potassium salt are particularly able. es of the salt derived from an organic base include salts with primary amine, ary amine, tertiary amine, substituted amine of these (including naturally present substituted amine), cyclic amine, basic amino acid, basic ion exchange resin and the like. Examples of the organic amine and amino acid include isopropylamine, diethylamine, triethylamine, trimethylamine, tripropylamine, ethylenediamine, N,N’— dibenzylethylenediamine, hylaminoethanol, 2— dimethylaminoethanol, morpholine, N—ethyl—morpholine, piperazine, piperidine, N-ethylpiperidine, e, caffeine, choline, glucamine, glucosamine, histidine, hydrabamine, methylglucamine, lysine, arginine, polyamine resin, procaine, purine, theobromine and the like.

Compound (1) or a pharmaceutically acceptable salt thereof may take the form.of a hydrate or solvate.

Compound (1) of the present invention may be derived from a pharmaceutically acceptable prodrug of compound (1). The pharmaceutically acceptable prodrug is a compound having a group converted to a hydroxy group, a carboxy group or the like by solvolysis or under physiological conditions. Examples of the group forming a g include the groups described in Prog. Med., 1985, vol. 5, pp. 161, and "IYAKUHIN no KAIHATSU (Development of Pharmaceuticals)", Vol. 7, Design of Molecules, pp. 163—198, hed by HIROKAWA SHOTEN (1990).

A g of compound (1) is preferably a compound converted to a compound by a reaction due to an enzyme, gastric acid and the like in the body.

As the compound, the following compound (l—l) — compound {1—4) can be mentioned.

Compound (1—1) wherein the hydroxy group in compound (1) is ed, alkylated, phosphorylated or borated.

Specifically, a compound wherein the hydroxy group in compound (1) is acetylated, propanoylated, butanoylated, pivaloylated, oleylated, palmitoylated, succinylated, fumarylated, alanylated, or dimethylaminomethylcarbonylated.

Compound (1—2) wherein the carboxy group in compound (1) is esterified or ed. Specifically, a compound wherein the carboxy group in compound (1) is phenyl—esterified or idyl—esterified, and the like.

Compound (l—3) wherein the carboxy group in compound (1) is substituted by a ymethyl group.

Compound (l—4) n the carbonyl group of the 5— membered ring moiety in compound (1) is enol-esterified.

These compound (l—l) — compound (1-4) can be produced by a known method. Compound (l—l) — compound (1—4) may be a e or a non—hydrate.

Compound (1) of the present invention or a pharmaceutically acceptable salt thereof may take the form of a clathrate compound of cyclodextrin. As the cyclodextrin, d- cyclodextrin, ß-cyclodextrin, ?-cyclodextrin, sulfobutylether- ß-cyclodextrin, hydroxypropyl-ß-cyclodextrin, or a mixture of two or more kinds ed from these is used. As the extrin, a-cyclodextrin or ß-cyclodextrin is preferable, and odextrin is particularly preferable.

As the production method of a cyclodextrin clathrate compound, methods generally known widely as emulsion method, ted aqueous solution method, ng method, mixing and pulverizing method and the like can be used. Specifically, it can be produced using compound (1) or a pharmaceutically able salt thereof, and cyclodextrin and by the method described in JP-B3362, JP-B31404 or JP-B52146. By formulating compound (1) as a cyclodextrin clathrate compound, properties such as stability and water solubility increase, and properties preferable as pharmaceutical products can be imparted.

(Production method of the compound of the present ion) The compound of the present invention can be synthesized by a general PG synthesis method. The concept of the synthetic route is shown in the following formulas.

For example, a compound wherein the -A-B- moiety is a double bond can be synthesized using a compound in which achain is introduced into Corey lactone as a starting material, by reducing the 15-position carbonyl group of the a,ßunsaturated carbonyl moiety in the ?-chain (compound of the following formula wherein W is H) uced by a Horner- Wadsworth-Emmons reaction, ucing a double bond into the a-chain when desired, oxidizing the 9-position and deprotecting the hydroxy-protecting group.

A PG derivative having fluorine at the 2-position can be synthesized by, for example, synthesizing the starting material by introducing a-chain having a difluoro unit into Corey lactone, and performing a on similar to the above- mentioned reaction.

A compound wherein the —A—B— moiety is a single bond can be synthesized by performing 1,4—reduction of the d,B~ unsaturated carbonyl moiety in the m-chain (W in the following formula is H) introduced by a Horner—Wadsworth—Emmons reaction using Stryker’s reagent ([(Ph3P)CuH]5), and a reducing agent such as sodium dithionite.

A nd wherein the -A—B- moiety is a triple bond can be synthesized by reducing, in the presence of a ation agent such as N—bromosuccinimide and l,3-dibromo-5,5— dimethylhydantoin, the lS—position carbonyl group of the d— bromo-d,B—unsaturated yl moiety in the w—chain (W in the following formula is a bromine atom) introduced by a Horner— rth—Emmons reaction, and performing a dehydrobromination reaction using sodium hydroxide, potassium tert—butoxide, or a base such as cesium acetate/lB-crown—6. 0. R} R2 .R3 0 R Q.7 $01M (M60)PM R70 YAEOMB «\JY' 2" 21 Z"2 ’< ¢\\/ 212 .~ 0 0 ~ :; ‘CH0 W Fag/R3 . ' R86 R80 0 In the formulas, R7, R8 and R9 are each independently a hydroxy—protecting group, W is a hydrogen atom or a bromine atom, and each of other symbols is as defined above.

As the hydroxy—protecting group for R7 - R9, the y— protecting groups bed in e’s/Protective/Groups/in/Organic/Synthesis 4th Edition" (by P. G. M. Wuts, T. W. Greene, J. Wiley & Sons, 2007), pp. 16—430 and the like can be used. ically, acyl group, tri—organosilyl group, alkoxyalkyl group, a monovalent group having a cyclic ether structure and the like can be mentioned.

As the acyl group, acetyl group, benzoyl group, acetyl group, dichloroacetyl group, trichloroacetyl group, trifluoroacetyl group and the like are able. As the tri— organosilyl group, a group in which three of alkyl group, aryl group, aralkyl group and alkoxy group are bonded to the silicon atom is preferable. Specifically, for example, tert— butyldimethylsilyl group, tert—butyldiphenylsilyl group, trimethylsilyl group, triethylsilyl group, triphenylsilyl group, triisopropylsilyl group and the like are preferable. As the alkoxyalkyl group, methoxymethyl group, benzyloxymethyl group, tert—butoxymethyl group, 2-methoxyethoxymethyl group, 1- ethoxyethyl group, l—methyl—l-methoxyethyl group and the like are preferable. As the monovalent group having a cyclic ether structure, tetrahydropyranyl group, tetrahydrofuranyl group and the like are preferable. Acetyl group, benzoyl group, tetrahydropyranyl group, tert—butyldimethylsilyl group, tert— butyldiphenylsilyl group and the like are particularly preferable.

The hydroxy—protecting groups can be deprotected easily by a conventional method. Specifically, for example, they can be deprotected by the methods described in "Greene’s/Protective/Groups/in/Organic/Synthesis 4th Edition" (by P. G. M. Wuts, T. W. Greene, J. Wiley & Sons, 2007), pp. 16—430 and the like. id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85"

[0085] A PG derivative in which the 5—position (Y) of the d- chain is a hetero atom can be synthesized as shown in the following by using Corey lactone that ucted w—chain as a starting material, reducing the lactone moiety to give diol, ucing d—chain, oxidizing the 9-position, and deprotecting other hydroxy—protecting groups. 9% Hg ?\/0H1 .

ONAW/' R3 R1 R2/ ,R3 Q R, R2 . .__> c // -, .A/BM R80 0R9 R35 6R9 \/.Y\/\:]§\Z\2X Hg.’ Y?‘X: »\\\\/ ' 21 M Q R]. R2 R3 _ 5 l-A’BE/k/ R80. 5R9 R50 5R9 0 0. o Y\/\\~ Yg/A§{»\X \/ 212 ‘;-'\/ 21 R2 R3 R3 R2 R A»: A - , H6 6H A In the formulas, each symbol is as defined above.

Representative examples of the production method of compound (1) can be shown by the following formulas.

In the following formulas, the ing abbreviations are used.

Me: methyl Ac: acetyl THP: ydro—ZH—pyran—Z-yl é. 0MB 0M5 (54:90)sz ’ AcO, AGO \\/\ 6 '- \ 0 ~ AHZ & < E ————-——-——-——->~ -——————————>— up 5 THPé THPO .0 ‘ A—S H5 0H THPS éer H0 6H 1 o O x o \ ?~ \/\/\/\L #0" \ 0M6 0 HQ H% ‘ p &\J ‘ \, \\ THPd 6TH? A—7 A‘B The starting material in the aforementioned formulas is aldehyde (A—l) described in JP—B—60-36422 and the like, and d,B—unsaturated ketone (A—3) is obtained from aldehyde (A—1) and onate (A—2) by the —Wadsworth—Emmons reaction.

After reduction of the 15—position yl group, deprotection is performed to give diol (Ar4). After protection of the hydroxy group, hydrolysis is performed to give carboxylic acid (A—5). The unprotected hydroxy group on the 5-membered ring is oxidized and deprotected, whereby compound (A—6) of the present invention (compound (l)—9) can be synthesized. id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91"

[0091] After protection of two y groups of compound (A—4), deacetylation is performed to give alcohol (A—7). The a— position of the ester is phenylselenylated, an elimination reaction with hydrogen peroxide water is performed and ester hydrolysis is performed to give d,B—unsaturated carboxylic acid (A—8). The unprotected hydroxy group on the 5—membered ring is oxidized and deprotected, whereby compound (A—9) of the present invention (compound (1)—10) can be obtained.

For esterification of the carboxy group of compound (A—6) or (A—9) of the present invention, a l method, for e, the method bed in "Shinjikken Kagaku Koza (Courses in Experimental Chemistry) 14 synthesis and reaction of organic compound (11)" en Company, Limited) can be used. For example, methods such as esterification by condensation with alcohols and phenols, esterification by an O— alkylating agent, esterification using alkenes and alkynes, esterification by dialkyl sulfate and nated hydrocarbons and the like are used. For conversion to acylamides and amides, for example, the method of Tithereley et al. (J.

Chem. Soc., 1904, vol. 85, p. 1673), the method of Lynch et al.

(Can. J. Chem., 1972, vol. 50, p. 2143), the method of Davidson et al. (J. Am. Chem. Soc., 1958, vol. 80, p. 376) and the like can be adopted. In addition, a method including converting carboxylic acid to acid halide or active ester, then a sation reaction directly with amides or sulfonamides, or a reaction with amines to once convert to amides, followed by acylation or sulfonylation and the like is used.

The compound of the present invention has an asymmetric carbon in the structure thereof. Thus, various stereoisomers and optical isomers are present. The present invention encompasses all isomers, optical isomers, and mixtures thereof.

The nd of the present invention is a derivative less susceptible to metabolism in vivo and having ed stability. Compound (1) has an alkyl group at the 16—position carbon atom, and therefore, the hydroxy group at the 15— position of the PG skeleton is less susceptible to metabolism by PG dehydrogenase and shows high metabolic stability. Thus, it has a long half—life in blood and can maintain effective blood concentration for a long time as compared to natural type PG. Having improved metabolic stability, the nd can improve ilability of drugs.

The compound of the present invention has an alkynyl group in the o—chain and shows very potent actions such as platelet aggregation suppressive activity. In ular, a derivative having a lkyl group on the end of the alkynyl group is stable and exhibits potent ty. id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95"

[0095] The compound of the present invention and a cyclodextrin clathrate compound thereof are useful as medicaments, and can show a superior effect as a drug for circulatory diseases, central nervous system diseases, inflammatory diseases, pain and the like. Specifically, the circulatory diseases include eral circulation disorder, Buerger's disease, Raynaud's disease, angina pectoris, dial infarction, cardiac failure, pulmonary hypertension, pulmonary obliteration, es, cerebral infarction, cerebral thrombus, deafness, Meniere’s disease and the like. The central s system diseases e sleeplessness, anxiety, depression, schizophrenia, dementia and the like. The inflammatory diseases e acute hepatitis, chronic hepatitis, cirrhosis, cholecystitis, cholangitis, acute pancreatitis, chronic pancreatitis, chronic peritonitis, acute peritonitis, cystitis, acute nephritis, chronic nephritis, encephalitis, polyneuritis, meningitis, myelitis, tis, rheumatoid arthritis, bronchitis, pneumonia, pleurisy, phlebitis, pericarditis, rhinitis, pharyngitis, labyrinthitis, otitis externa and the like.

A medicament containing the compound of the present invention or a cyclodextrin clathrate compound thereof (hereinafter to be indicated as "the medicament of the present invention") is particularly useful as a medicament for the prophylaxis or treatment of blood flow disorders. The medicament of the present invention may be a medicament containing the compound of the present invention and optionally containing a ceutically acceptable carrier and other eutic components.

When the medicament of the present invention is stered to patients as an agent for the prophylaxis or treatment of the aforementioned diseases, the daily dose varies depending on the age and body weight of patients, pathology and severity in patients, and the like. It is generally 0.00001 mg to 1 mg, preferably 0.0001 mg to 0.3 mg, as compound (1), which is desirably administered in one to several portions. For example, 0.0001 mg to 0.3 mg, particularly 0.001 mg to 0.1 mg, is preferable for oral administration. Meanwhile, 0.00001 mg to 0.1 mg, ularly 0.0001 mg to 0.03 mg, is preferable for intravenous administration. The dose can be appropriately increased or sed according to the disease or pathology, and continuous drip administration is mes desirable in the case of injection.

The medicament of the present invention can be administered to the body by oral administration or eral administration (e.g., blood vessel (intravenous and intraarterial) administration, intrarectal administration, and intraarticular stration). Examples of the administration form include oral administration forms such as tablet (including orally disintegrating tablet and sublingual tablet), film (including oral films), capsule (including soft e and microcapsule), e, powder, troche, and syrup, and parenteral stration forms such as liquid injection such as solution, emulsion, and suspension (e.g., subcutaneous injection, intravenous injection, intramuscular injection, intraperitoneal injection, and drip infusion), suppository (e.g., rectal suppository and vaginal suppository), eye drop, nasal drop, external preparation (e.g., transdermal preparation such as adhesive preparation, ointment, and cream), and pulmonary preparation (inhalant etc.). These preparations may be controlled—release preparations such as rapid release ation and ned—release preparation.

The preparation in the aforementioned administration form can be produced by adding additives necessary for ations such as general carrier, ent, lubricant, disintegrant, binder, and stabilizer to the medicament of the present invention and formulating the resulting mixture by a conventional methodd For example, when the preparation is a tablet, granule, powder or the like, it can be produced using any pharmaceutical carriers suitable for ing a solid preparation, for example, excipient, ant, disintegrant, and binder.

Examples of the excipient include lactose, glucose, fructose, maltose, isomerized lactose, reduced lactose, lactose crystal, saccharose, itol, erythritol, maltitol, xylitol, palatinose, trehalose, sorbitol, cornstarch, potato starch, wheat starch, rice starch, crystalline cellulose, ns (e.g., dextran, dextran 40, and dextran 70), pullulan, dextrin, talc, silicic anhydride, ous calcium phosphate, precipitated calcium carbonate, calcium.silicate and the like.

Examples of the ant include magnesium stearate, calcium stearate, sucrose fatty acid ester, sodium stearyl fumarate, stearic acid, talc, polyethylene glycol, beeswax and the like.

Examples of the egrant include starch, carboxymethylcellulose, hydroxypropylcellulose, carmellose, carmellose calcium, sodium carboxymethyl , croscarmellose sodium, hydroxypropylstarch and the like.

Examples of the binder include crystalline cellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, methylcellulose, sodium carboxymethylcellulose, partially pregelatinized starch, pregelatinized starch, sodium alginate, pullulan, gum arabic, n, polyvinylpyrrolidone, inyl alcohol), gelatin and the like.

A preparation in the aforementioned administration form may contain inert diluent, lubricant, stabilizer, solubilizing agent, corrigent and the like as necessary. Examples of the inert diluent include calcium carbonate, sodium carbonate, lactose, calcium phosphate, sodium phosphate and the like.

Examples of the lubricant include magnesium stearate, stearic acid, colloidal silica, talc and the like. es of the stabilizer include ascorbic acid, sodium sulfite, glycine, L— aspartic acid, tocopheryl acetate, B—cyclodextrin, fumaric acid and the like. Examples of the solubilizing agent include hylene glycol, propylene glycol, glutamic acid, aspartic acid and the like. Examples of the corrigent e citric acid, ascorbic acid, lactic acid, acetic acid, tartaric acid, malic acid, aspartame, acesulfame potassium, thaumatin, saccharin sodium, dipotassium glycyrrhetinate, sodium glutamate, sodium 5’—inosinate, sodium 5’—guanylate and the like.

These tablets may be uncoated, or coated by a known technique to delay disintegration and absorption in the gastrointestinal tract, thereby ensuring a ned action for a longer time. For e, a time delay material, for example, yl earate or glyceryl distearate may be used.

The medicament of the present invention may be provided as a hard gelatin capsule containing a e with an inert solid diluent, for example, m carbonate, sodium carbonate, lactose, calcium phosphate, sodium phosphate or kaolin. In addition, the medicament of the present invention may be provided as a soft gelatin capsule containing a mixture with miscible solvent, for example, alcohols such as propylene glycol, polyethylene glycol, glycerol, and ethanol and an oil medium. es of the oil medium include fatty acid ester, liquid paraffin, vegetable oil such as peanut oil and olive oil and the like. Fatty acid ester is a compound in which a carboxy group of fatty acid forms an ester bond with alcohol and, specifically, glyceride optionally having a saturated or unsaturated branched chain, fatty acid ester ed of an ester compound of fatty acid and monohydric l and the like can be ned. Preferable fatty acid is medium—chain or long—chain fatty acid having 6 — 24 carbon atoms, and caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid, arachidonic acid and the like can be mentioned. Preferable ls include monohydric alcohols having 1 — 6 carbon atoms, polyols which are dric alcohols such as glycerol, polyethylene glycol, and propylene glycol and the like. Preferable fatty acid esters include glyceride optionally having saturated or unsaturated branch, glycerol fatty acid ester, and propyleneglycol fatty acid ester. In addition, a mixture of two or more kinds of glycerides can also be used. The mixtures of glycerides e a mixture of caprylic acid ceride and capric acid triglyceride, vegetable oil such as castor oil, 3O corn oil, olive oil, sesame oil, rape seed oil, salad oil, cottonseed oil, camellia oil, peanut oil, palm oil, and wer oil. Examples of the fatty acid ester composed of an ester compound of fatty acid and monohydric alcohol include isopropyl myristate, isopropyl palmitate, ethyl linoleate, ethyl oleate and the like.

The major component of the coating film of the capsule is not ularly limited and, for example, various known components such as gelatin, eenan, pectin, pullulan, sodium alginate, starch, hypromellose, and ypropylcellulose can be mentioned.

Preferable examples of the plasticizer used for the production of the coating film of soft capsules include polyhydric alcohol such as glycerol, ethylene glycol, polyethylene glycol, propylene glycol, and polypropylene glycol, sugar l such as sorbitol, mannitol, xylitol, maltitol, cornstarch—derived sugar alcohol solution, and reduced maltose syrup, and the like. Two or more kinds of these plasticizers may be used in combination.

When the preparation is liquid such as syrup, solution, emulsion, and suspension, for example, it can be ed by appropriately selecting stabilizer, suspending agent, corrigent, aromatic, soothing agent and the like. When ion is produced, it can be aseptically prepared by ving the active ingredient er with a pH er such as hydrochloric acid, sodium hydroxide, sodium lactate, acetic acid, sodium hydrogen phosphate, and sodium dihydrogen phosphate; an isotonicity agent such as sodium chloride, glucose, D—sorbitol, glycerol, and D—mannitol; a surfactant such as stearylethanolamine, sodium lauryl e, lauryl aminopropionate, lecithin, benzalkonium chloride, and glycerol monostearate; a suspending agent such as poly(vinyl alcohol), polyvinylpyrrolidone, sodium carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose; and a soothing agent such as benzyl alcohol in led water for injection. It may also be prepared using an inert non—aqueous diluent such as propylene glycol, polyethylene glycol, olive oil, ethanol, and polysorbate 80. Furthermore, injection to be dissolved when in use may be prepared by adding mannitol, dextrin, cyclodextrin, gelatin and the like and freeze-drying the resulting mixture in vacuuml For stabilization and improving lesion reachability, a liposome preparation may also be prepared by a known method and used as an injection. What is called a lipoid preparation (fat emulsion) in which the compound of the present invention is dissolved in fine fat emulsion particles can also be prepared, and it can be produced by mixing an oil component such as fatty acid ides; phospholipid such as egg—yolk lecithin and n lecithin; and additives such as emulsion nt, stabilizer, polymer substance, and isotonicity agent as necessary.

In addition, an intrarectal administration preparation may be prepared by using a base for itory such as cacao butter, fatty acid triglyceride, fatty acid diglyceride, fatty acid monoglyceride, and polyethylene glycol. Furthermore, an ectally injecting ointment can also be prepared by adjusting to a le viscosity with a water—soluble base such as polyethylene glycol, polypropylene glycol, glycerol, and glycerolgelatin, an oily base such as white petrolatum, hard fat, paraffin, liquid paraffin, plastibase, lanolin, and purified lanolin, and the like. id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112" id="p-112"

[0112] The medicament of the present ion can be administered topically to the skin or mucosa, i.e., transdermally or transmucosally. Examples of the general dosage form for this object include gel, hydrogel, , solution, cream, ointment, dusting powder, dressing agent, foam preparation, film, skin patch, wafer, implant, sponge, fiber, bandage, microemulsion and the like. Examples of the general r include l, water, mineral oil, liquid paraffin, white petrolatum, glycerol, polyethylene glycol, propylene glycol and the like.

The medicament can be directly administered to the eye or ear, in the form of an isotonic, pH lled eye drop of a suspension of fine powder or solution in sterile saline. Other dosage forms suitable for ocular or aural administration include ointment, biodegradable implant, non—biodegradable implant, wafer, lens, microparticles such as liposome, and the like. Crosslinked polyacrylic acid, poly(vinyl l), hyaluronic acid, cellulose polymers such as hydroxypropylmethyl cellulose, hydroxyethyl cellulose, and methyl cellulose, or rs such as complex polysaccharides such as gellan gum can be mixed with a preservative such as konium chloride.

To produce a pulmonary administration preparation, the medicament of the present invention is dissolved or sed in a conventional spray and filled in a pressure resistant container. It can also be pulmonarily administered as a liposome preparation by a known method.

In order to use the medicament of the present invention in any of the aforementioned administration forms and improve solubility, dissolution rate, bioavailability and/or stability thereof, the medicament can be further mixed with extrin and an appropriate derivative thereof or a soluble polymer unit of polyethylene glycol—containing polymer and the like. For e, a mixture, a complex etc. of these have been confirmed to be generally useful for most dosage forms and administration routes. Both inclusion and non—inclusion complexes can be used.

As an ative method for directly g a complex with a drug, cyclodextrin can also be used as an auxiliary additive, i.e., r, excipient or solubilizer. For these objects, a— cyclodextrin, B-cyclodextrin, hydroxypropyl—B—cyclodextrin, y— cyclodextrin and the like are generally used.

The compound of the present invention may be a pharmaceutically acceptable salt of a compound represented by the formula (1). As the salt, those mentioned above can be recited.

Other therapeutic components (hereinafter to be also referred simply to as "other drugs") to be contained in the medicament of the present ion are not particularly limited as long as they are drugs that supplement and/or e the prophylactic and/or therapeutic effect of the compound of the present invention on blood flow disorders (e.g., spinal canal stenosis) and the like, drugs that can improve pharmacokinetics and absorption of the compound of the present invention and reduce the dose of the compound of the present invention, drugs that reduce the side effects of the compound of the present invention and the like. es of other drugs for supplementing and/or enhancing the prophylactic and/or therapeutic effect of the compound of the present invention on blood flow disorders (e.g., spinal canal stenosis) and the like include, but are not d to, prostaglandins, prostaglandin derivative preparations, vasodilators, anti-platelet drugs (platelet aggregation inhibitors), analgesic drugs, ns, muscle relaxants, antidepressants and the like. id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119" id="p-119"

[0119] Examples of the prostaglandins include PG receptor agonist, PG receptor antagonist and the like. es of the PG receptor include PGE receptor (EP1, EP2, EP3, and EP4), PGD receptor (DP and CRTHZ), PGF receptor (FP), PGI receptor (IP), TX receptor (TP) and the like. Examples of the prostaglandin tive preparation e ost, beraprost and the like.

Examples of the vasodilator include angiotensin converting enzyme inhibitor (e.g., captopril, enalapril, and delapril), angiotensin II antagonist (e.g., candesartan cilexetil, losartan, eprosartan, valsartan, artan, irbesartan, olmesartan medoxomil, tasosartan, 1-{[2’—(2,5— o—S—oxo—4H—1,2,4—oxadiazolyl)biphenylyl]methyl}—2— ethoxy—1H—benzimidazole—7—carboxylic acid), m channel blocker (e.g., manidipine, nifedipine, nicardipine, amlodipine, and efonidipine), ium channel opener (e.g., levcromakalim, L—27152, AL0671, and NIP—121), clonidine and the like.

Examples of the anti—platelet drug (platelet aggregation inhibitor) e clopidogrel sulfate, ticlopidine hydrochloride, cilostazol, ethyl icosapentate, sarpogrelate hydrochloride and the like.

Examples of the analgesic drug include acetaminophen, non—steroidal antiinflammatory drugs, neuropathic pain relieving drugs, pyrazolone drugs and the like. For eXample, sodium salicylate, aspirin, aspirin—dialuminate ation, diflunisal, indomethacin, suprofen, ufenamate, dimethylisopropylazulene, bufexamac, felbinac, diclofenac, tolmetin sodium, clinoril, fenbufen, tone, proglumetacin, indomethacin farnesyl, acemetacin, proglumetacin maleate, amfenac sodium, mofezolac, etodolac, ibuprofen, ibuprofen piconol, naproxen, flurbiprofen, flurbiprofen axetil, ketoprofen, fenoprofen m, tiaprofen, zin, pranoprofen, loxoprofen sodium, profen, zaltoprofen, mefenamic acid, mefenamic acid aluminum, tolfenamic acid, floctafenine, ketophenylbutazone, oxyphenbutazone, piroxicam, cam, ampiroxicam, epirizole, tiaramide hydrochloride, tinoridine hydrochloride, emorfazone, neurotropin, pregabalin, sulpyrine, migrenin, pyrine cold remedies, dimetotiazine te, simetride combination drug, non-pyrine cold remedies and the like can be ned.

Examples of the Vitamin include mecobalamin and the like.

Examples of the muscle relaxant include tolperisone hydrochloride, chlorzoxazone, chlormezanone, methocarbamol, phenprobamate, pridinol mesylate, chlorphenesin, baclofen carbamate, eperisone hydrochloride, afloqualone, tizanidine hydrochloride, alcuronium de, suxamethonium chloride, tubocurarine chloride, dantrolene sodium, pancuronium bromide, vecuronium bromide and the like.

Examples of the antidepressant include tricyclic or tetracyclic antidepressant, SSRI (selective serotonin reuptake inhibitor), SNRI (serotonin—noradrenaline reuptake inhibitor) and the like. Examples of the tricyclic antidepressant include imipramine hydrochloride, desipramine hydrochloride, clomipramine hydrochloride, trimipramine maleate, amitriptyline hydrochloride, nortriptyline hydrochloride, lofepramine hydrochloride, ine, pin hydrochloride and the like, and examples of the tetracyclic antidepressant include iline, mianserin and the like. Examples of SSRI include paroxetine hloride hydrate and the like, and examples of SNRI e milnacipran hloride, tine hydrochloride and the like.

The weight ratio of the compound of the present invention to other drugs is not particularly limited, and any two or more kinds of other drugs may be administered in combination.

Preferable embodiments of the present ion are the following inventions. Compound (1) or a pharmaceutically acceptable salt thereof; <2> the compound or a ceutically acceptable salt thereof of the above—mentioned , wherein Y is CH2 or S; <3> the compound or a pharmaceutically able salt thereof of the above—mentioned <2>, wherein Y is CH2; <4> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <3>, n RA is — CH=CZl(COX); <5> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <3>, n RA is —CH2— CZ122(COX); <6> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <5>, wherein n is l; <7> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <6>, wherein A—B is a carbon—carbon double bond; <8> the compound or a pharmaceutically acceptable salt f of any of the above—mentioned — <7>, wherein Z1 and Z2 are hydrogen atoms; <9> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <8>, wherein R1 is a hydrogen atom and R2 is an alkyl group having 1 — 3 carbon atoms; the compound or a pharmaceutically acceptable salt thereof of the above—mentioned <9>, n R? is a methyl group; the compound or a pharmaceutically acceptable salt f of any of the above—mentioned — , wherein R3 is an alkyl group having 1 - 4 carbon atoms or a cycloalkyl group having 3 — 6 carbon atoms; <12> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned , wherein R3 is an alkyl group having 2 — 4 carbon atoms or a cycloalkyl group having 3 ~ 6 carbon atoms; <13> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned <12>, wherein R3 is a lkyl group having 3 — 6 carbon atoms; the compound or a pharmaceutically acceptable salt f of the above—mentioned <12>, wherein R3 is an alkyl group having 2 — 3 carbon atoms or a cycloalkyl group having 3 — 5 carbon atoms; <15> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned , wherein R3 is a cycloalkyl group having 3 — 5 carbon atoms; <16> the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <15>, n X is 0R4; <17> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned , n R4 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms or a substituted alkyl group having 1 — 6 carbon atoms; <18> the compound or a pharmaceutically able salt thereof of the above—mentioned <17>, wherein R4 is a hydrogen atom, an alkyl group having 1 — 6 carbon atoms, or an alkyl group having 1 — 6 carbon atoms substituted by a substituent(s) selected from the group consisting of a hydroxy group, an acyl group, an acyloxy group, an alkoxycarbonyloxy group, a substituted amino group, an aryl group and a cyclic group; the compound or a ceutically acceptable salt thereof of the above—mentioned <17>, n R4 is a hydrogen atom, an alkyl group having 1 — 4 carbon atoms or a substituted alkyl group having 1 — 4 carbon atoms; <20> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned , wherein R4 is a hydrogen atom, an alkyl group having 1 - 4 carbon atoms, or an alkyl group having 1 — 4 carbon atoms substituted by a substituent(s) selected from the group consisting of a hydroxy group, an acyl group, an acyloxy group, an alkoxycarbonyloxy group, a substituted amino group, an aryl group and a heterocyclic group; <21> the compound or a pharmaceutically acceptable salt thereof of the above—mentioned <20>, wherein R4 is a hydrogen atom, an alkyl group having 1 — 4 carbon atoms, a ylmethyl group or a (5—methyl—2—oxo—l,3—dioxol—4—yl)methyl group; <22> a cyclodextrin clathrate compound or a pharmaceutically acceptable salt thereof of the nd of any of the above— mentioned — <21>; <23> a medicament comprising the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <21>, or the cyclodextrin clathrate compound of the above— mentioned <22> as an active ingredient; <24> the medicament of the above—mentioned <23>, which is a prophylactic or therapeutic agent for a blood flow disorder; <25> the medicament of the above—mentioned <24>, wherein the blood flow disorder is a blood flow disorder of nerve; <26> the medicament of the above—mentioned <25>, wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis; <27> the ment of the above-mentioned <24>, wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; <28> the medicament of the above—mentioned <27>, wherein the blood flow disorder of peripheral artery is a blood flow disorder ated with chronic arterial occlusion or pulmonary hypertension; <29> the ment of the above—mentioned <27>, wherein the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; <30> the medicament of the above—mentioned <27>, n the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after al infarction; <31> the nd or a pharmaceutically acceptable salt thereof of any of the above-mentioned — <21>, or the cyclodextrin clathrate compound of the above-mentioned <22> for use in the prophylaxis or treatment of a blood flow disorder; <32> the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of the above— mentioned <3l>, wherein the blood flow disorder is a blood flow disorder of nerve; <33> the compound or a pharmaceutically acceptable salt thereof, or the cyclodextrin clathrate compound for use of the above— mentioned <32>, wherein the blood flow disorder of nerve is a blood flow er associated with spinal canal stenosis; <34> the compound or a pharmaceutically acceptable salt thereof, or the extrin clathrate nd for use of the above- mentioned <31>, wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; <35> the compound or a pharmaceutically acceptable salt f, or the cyclodextrin clathrate nd for use of the above— mentioned <34>, wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with c arterial occlusion or ary hypertension; <36> the compound or a pharmaceutically acceptable salt f, or the cyclodextrin clathrate compound for use of the above— mentioned <34>, wherein the blood flow disorder of skin is a blood flow disorder associated with pressure ulcer; <37> the compound or a pharmaceutically acceptable salt f, '15 or the cyclodextrin clathrate compound for use of the above— mentioned <34>, wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral infarction; <38> a method for prophylaxis or treatment of a blood flow disorder in a mammal, comprising administering an effective amount of the compound or a ceutically acceptable salt thereof of any of the above—mentioned <1> — <21>, or the cyclodextrin clathrate compound of the mentioned <22> to the mammal; <39> the method of the above—mentioned <38>, wherein the blood flow disorder is a blood flow disorder of nerve; <40> the method of the above—mentioned <39>, wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis; <4l> the method of the above—mentioned <38>, wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; <42> the method of the above—mentioned <4l>, wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary hypertension; <43> the method of the above—mentioned <4l>, n the blood flow er of skin is a blood flow disorder associated with pressure ulcer; <44> the method of the above—mentioned <4l>, wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral tion; <45> use of the compound or a pharmaceutically acceptable salt thereof of any of the above—mentioned — <21>, or the cyclodextrin clathrate compound of the above—mentioned <22> in the manufacture of a prophylactic or therapeutic agent for a blood flow disorder; <46> the use of the above—mentioned <45>, wherein the blood flow disorder is a blood flow disorder of nerve; <47> the use of the above—mentioned <46>, wherein the blood flow er of nerve is a blood flow disorder associated with spinal canal stenosis; <48> the use of the above—mentioned <45>, wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain; <49> the use of the above—mentioned <48>, wherein the blood flow disorder of peripheral artery is a blood flow er associated with chronic al occlusion or pulmonary hypertension; <50> the use of the above—mentioned <48>, wherein the blood flow disorder of skin is a blood flow disorder associated with re ulcer; and <51> the use of the above—mentioned <48>, wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral tion.

The present invention is explained in more detail in the following by referring to Reference Examples, Examples, Preparation Examples and Experimental Examples. The present invention is not limited by these Examples and the like and may be changed within the scope of the present invention.

Unless otherwise specified, the apparatuses, reagents and the like used in the present Examples and the like are easily obtained or prepared according to the methods generally conducted in the pertinent cal field, or commercially available.

In the following Reference Examples and Examples, the "room temperature" is generally about 10°C to about 30°C.

Unless otherwise specified, the ratios of mixed solvents are volume mixing ratios. % shows mol/mol% for yield and wt% for others.

The ing abbreviations are used in the Reference Examples and Examples.

Me: methyl Et: ethyl Pr: propyl Bu: butyl Ph: phenyl Ac: acetyl THP: tetrahydro—ZH—pyran—Z—yl TBS: utyldimethylsilyl KHMDS: potassium methylsilylamide DBU: l,8—diazabicyclo[5.4.0]undec—7—ene DMAP: 4—dimethylaminopyridine Py: ne DMSO: dimethyl sulfoxide DME: 1,2—dimethoxyethane p-TsOH: p—toluenesulfonic acid aq: aqueous solution id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129" id="p-129"

[0129] Reference Example 1: methyl (S)—5—cyclopropyl—2—methylpent—4— ynoate ‘Vyéj;i Lithium chloride (4.24 g) and zinc powder (9.15 g) were dried under reduced pressure, and ydrofuran (THF) (100 mL), 1,2—dibromoethane (0.433 mL) and trimethylchlorosilane (0.127 mL) were added thereto at room ature. To the mixture was added dropwise a solution of methyl (R)—3—iodo—2— methylpropionate (22.8 g) in THF (30 mL), and the mixture was stirred at 40°C for 1.5 hr to prepare an organozinc reagent.

In another reaction container were added lithium de (7.63 g), copper(I) cyanide (8.06 g) and THF (90 mL), and the mixture was stirred for 1 hr. The mixture was cooled to —10°C, and the aforementioned organo zinc reagent was added dropwise thereto.

The reaction mixture was stirred at —10°C for 10 min, cooled to —78°C, and a solution of 2—(bromoethynyl)cyclopropane (14.5 g) in THF (50 mL) was added dropwise. The mixture was stirred at the same temperature for 15 hr and poured into an aqueous ammonium chloride solution, and the e was extracted with ethyl acetate. The c layer was washed with water, and the insoluble material was filtered off and washed with ethyl acetate. The filtrate was trated under reduced pressure, and the residue was purified by silica gel column chromatography (diethyl etherzhexane = 1:30 - 1:5) to give the title compound (9.93 g). Yield: 66%. 1H NMR (400 MHz, CDC13) 6 3.69 (s, 3H), 2.59 (dq, J = 6.8, 7.2 Hz, 1H), 2.46 (ddd, J = 2.0, 6.0, 16.4 Hz, 1H), 2.29 (ddd, J = 2.0, 7.8, 16.4 Hz, 1H), 1.23 (d, J = 7.2 Hz, 3H), 1.22 (m, 1H), 0.71 (m, 2H), 0.60 (m, 2H).

Reference Example 2: dimethyl (S)—(+)-(6-cyclopropy1-3—methy1- 2—oxohex—5—yn—1—yl)phosphonate Me‘O‘s‘ ,~ . —~—--—————%wV 'Meo??' O 10 THE (25 mL) was added to dimethyl methylphosphonate (4.34 mL), and 1.6 M n—butyllithium (23.7 mL) was added dropwise thereto at —78°C. The reaction mixture was stirred at -78°C for 1 hr, a solution of methyl (S)—5-cyclopropyl—2—methylpent— 4—ynoate obtained in Reference Example 1 in THF (10 mL) was added thereto, and the mixture was stirred at the same temperature for 4 hr. To the reaction mixture was added an s ammonium de solution, and the mixture was extracted with ethyl acetate, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was ed by silica gel column chromatography (ethyl acetate:hexane = 1:3 — ethyl acetate alone) to give the title compound (2.36 g). Yield: 61%. 1H NMR (400 MHz, CDCla) 5 3.81 (s, 3H), 3.78 (s, 3H), 3.20 (ddd, J = 14.4, 22.8, 28.4 Hz, 2H), 2.91 (q, J = 6.8 Hz, 1H), 2.33 (dddd, J = 2.0, 6.8, 16.8, 44.4 Hz, 2H), 1.18 (d, J = 7.2 Hz, 3H), 1.18 (m, 1H), 0.71 (m, 2H), 0.60 (m, 2H). id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135" id="p-135"

[0135] Reference Example 3: methyl 7—((1R,2R,3R,SS)~5—acetoxy—2— hydroxymethyl-3—((tetrahydro—ZH—pyran—2— y1)oxy)cyclopentyl)heptanoate 1’ PPhaBr/WCOZH .. .

OH KHMDS/ THF o/K A00,"p \/\/\/COZMe,» 2) Mel; i-P'rz'NEt, 0180 6, V, '1' : aceone : - .3 ——-——-————-——-—-—> BS ‘ = <1. ,OH 3) H2. Pd/C . 4:) A020, pyridine, DMAP‘ 1'de 5) 3‘14"" To a suspension of 4—(carboxybutyl)triphenylphosphonium bromide (14.06 g) in THF (86 mL) was added 1M potassium bistrimethylsilylamide (64 mL), and the mixture was stirred for 1 hr. The mixture was cooled to —78°C, and a solution of (3aR,4S,5R,6aS)—4—(((tert- butyldimethylsilyl)oxy)methyl)hexahydro—5—((tetrahydro—ZH— pyran-2—yl)oxy)—2H—cyclopenta[b]furan—2—ol (3.92 g) in THF (50 mL) was added thereto. The e was stirred at the same temperature for 30 min, heated to room temperature, and stirred overnight. Water was added to the reaction mixture, and the mixture was extracted with tert—butylmethylether, acidified with disodium citrate, and extracted with ethyl acetate. The organic layer was dried over ous sodium sulfate and concentrated under d pressure, and acetone (390 mL) was added thereto. Diisopropylethylamine (9.16 mL), iodomethane (2.95 mL) and l,8—diazabicyclo[5.4.0]undec—7—ene (7.85 mL) were added thereto at 0°C. The mixture was d at room ature for 3.5 hr, saturated aqueous sodium hydrogen ate was added thereto, and the mixture was extracted with ethyl acetate. After concentration under reduced pressure, the residue was purified by silica gel column chromatography to give a viscous oil (3.21 g). Methanol (220 mL) was added to the oil (3.13 g), and the mixture was stirred using 5% Pd/C (1.13 g) under a hydrogen atmosphere for 40 min. The catalyst was filtered off, and the filtrate was concentrated under reduced re. To the residue were added pyridine (14 mL), acetic anhydride (14 mL), and 4—dimethylaminopyridine (170 mg), and the mixture was stirred for 1 hr. Water was added to the reaction mixture, and the mixture was extracted with a hexane— ethyl acetate mixed solvent. The c layer was dried over anhydrous sodium sulfate and trated under reduced pressure. THF (32 mL) was added to the residue, and the mixture was ice-cooled. 1M tetrabutylammonium.fluoride (6.7 mL) was added thereto, and the mixture was stirred at room temperature for 3 days. The on mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexanezethyl acetate = 3:1 - 1:3) to give the title compound (2.60 g). 1H NMR (300 MHz, CDCl3) 5 5.07 (m, 1H), 4.71 (m, 0.55H), 4.54 (m, , 4.15—4.04 (m, 1H), 4.04—3.88 (m, 1H), 3.88— 3.73 (m, 2H), 3.66 (s, 3H), 3.60—3.48 (m, 2H), 2.29 (m, 2H), 2.04 (t, J = 7.5 Hz, 2H), 1.95-1.15 (m, 20H).

Reference Example 4: methyl 7—((1R,2R,3R,58)~5—acetoxy—2— formyl—3—((tetrahydro-ZH-pyran—Z—yl)oxy)cyclopentyl)heptanoate COZM'e some soa-Pyl D‘MSO ' *> -. I.

O\/0H. -——————————————————-—> AcOEt, iPI'JzEtN OV‘O_ THPd IHPd Methyl 7—((1R,2R,3R,58)—5—acetoxy—2—hydroxymethyl—3— ((tetrahydro—ZH—pyran—Z—yl)oxy)cyclopentyl)heptanoate (3.0 g) was dissolved in ethyl e (48 mL), and N,N— diisopropylethylamine (7.6 mL) was added thereto under ice— cooling. To the mixture was added a solution of SO3~pyridine (3.6 g) in dimethylsulfoxide (24 mL), and the e was stirred for 30 min under ice-cooling. The reaction mixture was poured into ethyl acetate (50 mL) and water (50 mL), partitioned by adding aqueous sodium hydrogen carbonate, and the organic layer was concentrated under d pressure.

Hexane was added to the residue, and the mixture was washed successively with an aqueous copper sulfate solution, saturated brine and water. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the title compound (2.75 g). 1H NMR (300 MHz, CDCl3) 5 9.77 (dd, J = 16.1, 3.2 Hz, 1H), .13 (m, 1H), 4.70—4.50 (m, 1H), 4.41 (m, 1H), 3.81 (m, 2H), 3.66 (s, 3H), 3.46 (m, 2H), 3.40—2.92 (m, 0.46H), 2.88—2.78 (m, , 2.28 (t, J = 7.5 Hz, 2H), 2.50—2.20 (m, 1H), 2.06 (s, 3H), 1.98—1.52 (m, 16H).

Reference Example 5: methyl ,2R,3R,58)—5—acetoxy-2— ((1E,4S)—7—cyclopropyl—4-methyl-3—oxohept—1~en-6—yn—1—yl)—3— ((tetrahydro—ZH—pyran—Z—yl)oxy)cyclopentyl)heptanoate ICOZMe , \\?/V.

NjaH TH?(§ MeO y _ _ Meal?! ’ ——>" —-—-~———>'; O 0 DME’ - THP5 To sodium e (60%, dispersion in oil) (575 mg) was added 1,2—dimethoxyethane (126 mL), and a solution of dimethyl (S)-(+)—(6—cyclopropyl—3—methyl—2—oxohex—5—yn—1—yl)phosphonate (3.41 g) synthesized in Reference Example 2 in 1,2— dimethoxyethane (20 mL) was added dropwise o under ice— cooling. The mixture was stirred under ice-cooling for 1 hr, a solution of methyl ,2R,3R,58)—5—acetoxy—2—formyl—3— ((tetrahydro—2H—pyranyl)oxy)cyclopentyl)heptanoate (2.75 g) synthesized in Reference Example 4 in 1,2—dimethoxyethane (40 mL) was added dropwise thereto, and the mixture was stirred at the same temperature for 3 hr. To the reaction mixture were added ethyl acetate (290 mL) and saturated brine (290 mL), the mixture was diluted with water to carry out a liquid separation, and the aqueous layer was ted with ethyl acetate. The organic layer was dried over ous sodium sulfate and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate = 86:14 — ethyl acetate alone) to give the title compound (3.43 g) as a colorless oil. Yield: 61% (2 step yield from methyl 7—((1R,2R,3R,58)—5—acetoxy—2—hydroxymethyl ((tetrahydro—ZH—pyran—Z—yl)oxy)cyclopentyl)heptanoate obtained in Reference Example 3). 1H NMR (400 MHz, CDCla) 6 6.80 (m,1H), 6.28 (m, 1H), 5.12 (brt, J = 5.7 Hz, 1H), 4.54 (dt, J = 12.8, 3.0 Hz, 1H), 4.12— 3.96 (m, 1H), 3.83—3.58 (m, 2H), 3.65 (s, 3H), 3.50—3.38 (m, 1H), 3.14—2.83 (m, 1H), 2.75—2.16 (m, 4H), 2.06 (s, 3H), 1.95— 1.05 (m, 20H), 1.18 (d, J = 7.2 Hz, 3H), 0.75—0.54 (m, 4H).

Reference Example 6: methyl 7-((1R,2R,3R,58)—5-acetoxy—2- ((1E,38,48)—7—cyclopropyl—3—hydroxy—4—methylhept—1—en—6—yn—1- yl)—3—hydroxycyclopentyl)heptanoate . .Co?m 1) NaBH4 I’VCBCIg-FZ'HQO y ICOZMev Ace], Ad;. 11' MeOH g, 13:5. . 2) 65 %.Ac0H ' / THPC3 '0- H5 5-H Methyl 7—((1R,2R,3R,SS)—5—acetoxy—2—((1E,4S)—7— cyclopropyl—4-methyl—3-oxohept-l—en-6—yn—1—yl)—3—((tetrahydro— an—2—yl)oxy)cyclopentyl)heptanoate (2.47 g) synthesized in Reference Example 5 was dissolved in methanol (42 mL), cerium chloride heptahydrate (1.74 g) was added thereto, and the mixture was cooled to —40°C. To the mixture was added sodium borohydride (90.2 mg), and the mixture was stirred at the same temperature for 75 min. The reaction e was diluted with ethyl acetate, partitioned by adding saturated aqueous sodium hydrogen carbonate and water, and the aqueous layer was extracted with ethyl acetate. The organic layers were combined, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced re to give the title compound (2.45 g) as a crude product. 1H NMR (400 MHz, CDC13) 5 5.65—5.45 (m, 2H), 5.09 (brs, 1H), 4.60 (m, 1H), .98 (m, 1H), 3.92-3.78 (m, 2H), 3.66 (s, 3H), .30 (m, 1H), 2.28 (t, J = 7.6 Hz, 2H), 2.30—2.13 (m, 2H), 2.04 (s, 3H), .10 (m, 23H), 0.96 (m, 3H), 0.72— 0.58 (m, 4H).

The aforementioned crude product (2.45 g) was dissolved in THE (9.3 mL), a 65% aqueous acetic acid solution (93 mL) was added thereto, and the mixture was stirred at 45°C for 2 hr.

The reaction mixture was allowed to cool to room temperature, water (100 mL) was added thereto, and the mixture was extracted with an ethyl acetate-hexane (1:1) mixed solvent. The organic layers were combined, dried over anhydrous sodium sulfate, and concentrated under d pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate = 67:33 — ethyl acetate alone) to give the title compound (723 mg) and a stereoisomer thereof (1.23 g). 1H NMR (400 MHz, CDCl? The title compound: 5 5.58 (dd, J = 15.2, 7.4 Hz, 1H), .45 (dd, J = 15.2, 9.2 Hz, 1H), 5.14 (brt, J = 4.6 Hz, 1H), 3.97 (t, J = 7.4 Hz, 1H), 3.87 (q, J = 8.5 Hz, 1H), 3.66 (s, 3H), 2.72—2.56 (m, 2H), 2.50 (dq, J = 8.5, 6.5 Hz, 1H), 2.28 (t, J = 7.6 Hz, 2H), 2.30—2.17 (m, 2H), 2.05 (s, 3H), 1.80—1.49 (m, 6H), 1.49—1.00 (m, 9H), 0.93 (d, J = 6.5 Hz, 3H), 0.75—0.68 (m, 2 H), 0.62—0.57 (m, 2H).

Isomer of the title compound: 5 5.61 (dd, J = 15.2, 5.6 Hz, 1H), 5.50 (dd, J = 15.2, 8.6 Hz, 1H), 5.15 (brt, J = 4.6 Hz, 1H), 4.18 (t, J = 4.8 Hz, 1H), 3.90 (m, 1H), 3.65 (s, 3H), 2.48 (dq, J = 8.6, 6.4 Hz, 1H), 2.28 (t, J = 7.6 Hz, 2H), 2.05 (s, 3H), 1.86—1.17 (m, 10H), 1.49—1.00 (m, 9H), 0.96 (d, J = 6.4 Hz, 3H), 0.72—0.68 (m, 2H), 0.62—0.58 (m, 2H). nce Example 7: ,2R,3R,58)—2-((1E,3S,4S)-7— cyclopropylmethyl—3—((tetrahydro—ZH—pyran—Z—yl)oxy)hept—l— en-6—yn—1-yl)—5—hydroxy—3-((tetrahydro—2H—pyran—2— yl)oxy)cyclopentyl)heptanoic acid "Co.

Vp—TS'OH I CH20|2 2) NaOH,- MeOH id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150" id="p-150"

[0150] Methyl 7—((1R,2R,3R,58)—5—acetoxy—2—((1E,3S,4S)—7— cyclopropyl—B—hydroxy—4—methylhept—1—en—6—yn—l—yl)—3— hydroxycyclopentyl)heptanoate (67.6 mg) synthesized in Reference Example 6 was dissolved in methylene chloride (1 mL), 3,4-dihydro-2H—pyran (41.3 uL) and p—toluenesulfonic acid monohydrate (2.9 mg) were added thereto at 0°C, and the mixture was stirred at the same temperature for 30 min. To the on mixture were added diethylether (10 mL) and saturated aqueous sodium hydrogen carbonate (10 mL), the mixture was partitioned, and the aqueous layer was extracted with diethylether. The organic layers were ed, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give acetoxy—bis tetrahydropyranyl (THP) ether form (117.1 mg) as a crude product. 1H NMR (400 MHz, CDCl3) 6 .26 (m, 2H), 5.10 (m, 1H), 4.81—4.58 (m, 2H), .80 (m, 6H), 3.65 (s, 3H), 3.48—3.40 (m, 2H), 2.60—2.31 (m, 1H), 2.28 (t, J = 7.6 Hz, 2H), 2.31—2.10 (m, 3H), 2.04 (s, 3H), 1.90—1.10 (m, 22H), 0.93 (m, 3H), 0.70- 0.68 (m, 2H), 0.62—0.58 (m, 2H).

The crude product (117 mg) of acetoxy—bis THP ether form obtained above was dissolved in methanol (0.7 mL), a 1N aqueous sodium hydroxide solution (0.45 mL) was added thereto at 0°C, and the e was stirred at room temperature for 26 hr. To the reaction e was added an s citric acid solution, and the mixture was extracted with ethyl acetate. The c layers were combined, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexanezethyl acetate = 1:1 — 1:3) to give the title compound (70.9 mg). 1H NMR (400 MHz, CDCl3) 5 5.55—5.25 (m, 2H), 4.71 (m, 2H), 4.15—3.84 (m, 6H), 3.47 (m, 2H), 2.50—2.35 (m, 1H), 2.34 (t, J = 7.2 Hz, 2H), 2.25—2.10 (m, 2H), 1.97—1.20 (m, 28H), 0.94 (m, 3H), 0.71—0.68 (m, 2H), 0.60—0.58 (m, 2H).

Reference Example 8: methyl 7—((1R,2R,3R,SS)-2—((1E,38,4S)—7— cyclopropyl—4—methyl—3—((tetrahydro—ZH—pyran—Z—yl)oxy)hept-1— en—6-yn—1—yl)—5—hydroxy—3—((tetrahydro—ZH—pyran—Z— yl)oxy)cyclopentyl)heptanoate CQMe \/\/\/ K2003 NbQH THPé 6THP To acetoxy—bis THP ether form sized in the same manner as in nce Example 7 (682.4 mg) were added ol (6 mL) and ium carbonate (382.8 mg), and the mixture was stirred at 40°C for 2 hr. The reaction mixture was allowed to cool to room temperature, diluted with ethyl acetate, neutralized with acetic acid, and partitioned by adding saturated aqueous sodium hydrogen carbonate. The organic layer was washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced re, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate = 84:16 - ethyl acetate alone) to give the title compound (566.6 mg). 1H NMR (400 MHz, CDC13) 5 5.58—5.42 (m, 1.5H), 5.28—5.18 (m, 0.5H), 4.77—4.60 (m, 2H), 4.18—4.08 (m, 2H), 3.90—3.75 (m, 3H), 3.66 (s, 3H), 3.51—3.38 (m, 2H), 2.50—2.00 (m, 5H), 2.29 (t, J = 7.4 Hz, 2H), 2.00—1.40 (m, 26H), 0.92 (dddd, J = 17.2, 17.2, 6.8, 6.8 Hz, 3H), 0.74—0.68 (m, 2H), 0.62—0.58 (m, 2H).

Reference Example 9: (2E)—7—((1R,2R,3R,SS)—2—((lE,38,4S)—7~ cyclopropylmethyl((tetrahydro—ZH—pyran—Z—yl)oxy)hept—1~ en—6—yn—1-yl)hydroxy—3—((tetrahydro—2H—pyran—2— yl)oxy)cyclopentyl)hept—2-enoic acid 1) MessiCIf, pyridine 2)LmuPQ,PhseSePh .l‘ 3) H202/NaHCOg ,V Q1NNaOH 1 \/\/\/ .° ’ THPé 6THP To methyl 7—((1R,2R,3R,58)—2—((1E,38,4S)—7—cyclopropyl—4— methyl—3—((tetrahydro-2H—pyran—2—yl)oxy)hepten-6—yn—1—yl)—5- hydroxy—3—((tetrahydro—2H—pyran—2—yl)oxy)cyclopentyl)heptanoate (364.4 mg) synthesized in Reference Example 8 was added ne (2 mL), and the mixture was cooled to 0°C.

Trimethylchlorosilane (0.12 mL) was added thereto, and the mixture was stirred at the same temperature for 30 min. The reaction mixture was diluted with a mixed solvent of hexane and ethyl acetate (10:1), partitioned by adding saturated aqueous sodium hydrogen carbonate, and the organic layer was washed successively with water and saturated brine. The organic layer was dried over anhydrous sodium sulfate and concentrated under d re to give silylether form (366.1 mg) as a crude The crude product (366.1 mg) of silylether form was dissolved in THF (2.5 mL), a THF solution (1.41 mL) of 1.12 M lithium diisopropylamide was added thereto at —78°C, and the mixture was stirred at the same temperature for 30 min. To the mixture was added dropwise a solution of diphenyldiselenide (412.9 mg) in THF (1 mL) at —78°C, and the e was stirred at the same temperature for 45 min and at 0°C for 1 hr. The reaction mixture was diluted with ethyl acetate, partitioned by adding saturated ammonium chloride, and the aqueous layer was ted with ethyl acetate. The organic layers were ed, washed with saturated brine, dried over anhydrous sodium e, and concentrated under reduced pressure to give Selenylated form (763 mg) as a crude product.

To the crude product (763 mg) of the Selenylated form were added ethyl acetate (4 mL), THF (2 mL) and sodium hydrogen carbonate (179.2 mg), and the mixture was stirred. To the mixture was added 30% hydrogen peroxide water (0.21 mL), and the mixture was d at 35°C for 1 hr. The reaction mixture was diluted with ethyl e, saturated aqueous sodium hydrogen carbonate was added o, and the mixture was extracted with ethyl e. The organic layers were combined, washed with saturated brine, dried over anhydrous sodium sulfate, and concentrated under d pressure. The residue was dissolved in methanol (5 mL), a 1N aqueous sodium hydroxide solution (1.9 mL) was added thereto at 0°C, and the mixture was stirred at room temperature for 43 hr. The reaction mixture was diluted with ethyl e, neutralized with a saturated aqueous disodium citrate solution, and extracted with ethyl acetate. The extract was dried over ous sodium sulfate, concentrated under reduced pressure, and purified by silica gel column chromatography (hexanezethyl acetate = 3:1 — ethyl acetate — ethyl acetate:methanol = 20:1) to give the title compound (169.8 mg). 1H NMR (400 MHz, CDCl3) 5 7.00—6.87 (m, 1H), 5.81 (d, J = 14.8 Hz, 1H), 5.63—5.41 (m, 2H), 5.30—5.18 (m, 1H), 4.82—4.60 (m, 2H), 4.20—3.52 (m, 6H), 3.72 (s, 3H), 3.53—3.39 (m, 2H), 2.59—1.00 (m, 25H), 0.92 (m, 3H), 0.74—0.63 (m, 2H), 0.60—0.52 (m, 2H).

Reference Example 10: methyl 7—((1R,2R,3R,58)—5-acetoxy-2— ((1E,4S)~4—methyl—3—oxonon—1—en—6-yn—1—yl)—3-((tetrahydro—2H— pyran—2—yl)oxy)cyclopentyl)heptanoate MeO\M Mao—5- , O O The title compound was sized in the same manner as in Reference Example 5 from dimethyl (S)—3-methyl—2—oxooct—5— yn—1-yl)phosphonate and methyl 7—((1R,2R,3R,58)—5—acetoxy-2— formyl-3—((tetrahydro—2H—pyran—2—yl)oxy)cyclopentyl)heptanoate synthesized in nce Example 4. 1H NMR (300 MHz, CDC13) 5 6.76 (m, 1H), 6.29 (m, 1H), 5.13 (m, 1H), 4.58 (m, 1H), 4.12—3.44 (m, 3H), 3.66 (s, 3H), 2.89 (m, 1H), 2.74—2.10 (m, 5H), 2.07 (s, 3H), 1.99—1.08 (m, 21H), 1.20 (d, J = 7.2 Hz, 3H), 1.10 (t, J = 7.4 Hz, 3H).

Reference e 11: methyl 7-((1R,2R,3R,58)-5—acetoxy—2— hydroxymethyl—3-((tetrahydro—ZH—pyran—Z—yl)oxy)cyclopentyl)— 2,2—difluoroheptanoate 9/i\ ‘ . , 1: -¢g_.f" .VOTBS: " THP‘S mm The title compound was synthesized in the same manner as in Reference Example 3 from (3aR,4S,5R,6aS)—4~(((tert— butyldimethylsilyl)oxy)methyl)hexahydro—5—((tetrahydro—ZH— 2—yl)oxy)—2H—cyclopenta[b]furan-Z-ol by using 4—(1— carboxy—2,2-difluorobutyl)triphenylphosphonium bromide instead of 4—(carboxybutyl)triphenylphosphonium bromide. 1H NMR (300 MHz, CDC13) 5 5.64 (dt, J = 5.2, 5.2, 2.0 Hz, 1H), 4.70 (dd, J = 4.0, 0.8 Hz, 0.5H), 4.53 (dd, J = 5.1, 2.4 Hz, 0.5H), 4.08 (dddd, J = 8.4, 6.6, 4.8, 4.4 Hz, 0.5H), 4.53 (dd, J = 8.0, 6.2, 4.4, 4.4 Hz, 0.5H), 3.96—3.71 (m, 2H), 3.85 (s, 3H), 3.58—3.43 (m, 2H), 3.00 (brs, 1H), 2.29 (m, 2H), 2.12— 1.15 (m, 18H), 2.03 (d, J = 2.4 Hz, 3H). 19F NMR (282.65 MHz, CDyDD) 6 —106.26 (t, J = 17.3 Hz, 2F).

Reference Example 12: 2—((18,2R,3R,58)—5-hydroxy—2— 3o ((1E,3RS,4S)—4—methyl—3—((tetrahydro—ZH-pyran-2—yl)oxy)non—1— en—6—yn—1—yl)—3—((tetrahydro—ZH—pyran—Z— c"‘m‘ 6 6 yl)oxy)cyclopentyl)ethanol O/‘kl . . "0,1 ; \QV . ., // THPO OTHP THPé 0TH? (3aR,4R,5R,6aS)-hexahydro—5—hydroxy((1E,3RS,4S)—3— hydroxy—4—methyl—1—nonen—6-ynyl)—2H—cyclopenta[b]furan—2—one (3.50 g) was dissolved in methylene chloride (61 mL), 2,3— dihydropyran (3.3 mL) and p—toluenesulfonic acid monohydrate (24.5 mg) were added thereto under oling, and the mixture was stirred at room temperature for 30 min. The reaction mixture was poured into saturated aqueous sodium hydrogen carbonate, and the mixture was extracted with ethyl acetate.

The organic layer was dried over anhydrous sodium e and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate = 85/15 - ethyl acetate) to give bis THP ether form (7.26 g). The bis THP ether form (994 mg) was dissolved in THF (4 mL) and added to a suspension of lithium aluminum hydride (75 mg) in THF (4 mL) under ice—cooling. The mixture was stirred at the same temperature for 40 min. The reaction e was diluted with diethylether, an aqueous sodium e solution was added thereto, and the mixture was ed through celite and washed with ethyl acetate. The filtrate was concentrated under reduced re to give the title nd (953 mg) as a viscous oil. 1H NMR (300 MHz, CDCl3) 5 5.60—5.26 (m, 2H), 4.77~4.65 (m, 2H), 4.30—3.60 (m, 7H), 3.48 (m, 2H), 2.20—1.40 (m, 25H), 1.13 (t, J = 6.9 Hz, 3H), 0.96 (m, 3H).

Reference Example 13: methyl 4—((2—((1R,2R,3R,SS)—5—hydroxy—2— ((1E,3RS,4S)-4—methyl((tetrahydro-ZH-pyran—Z—yl)oxy)non—1— en—6—yn—1—yl)-3—((tetrahydro—ZH—pyran-Z— yl)oxy)cyclopentyl)ethyl)thio)butanoate THPC; 0TH? id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169" id="p-169"

[0169] 2—((18,2R,3R,SS)—5—hydroxy—2—((1E,3RS,4S)—4—methyl—3— ((tetrahydro—2H—pyran—2—yl)oxy)non—l—en—6—yn—1—yl)—3— ((tetrahydro—2H—pyran—2—yl)oxy)cyclopentyl)ethanol (122 mg) synthesized in Reference Example 12 was dissolved in THF (2 mL), diisopropylethylamine (91 uL) and methanesulfonyl chloride (30 uL) were added thereto at —20°C, and the mixture was stirred for 1 hr. To the reaction mixture were added diisopropylethylamine (44 uL) and methanesulfonyl chloride (10 uL), and the mixture was stirred at -lO°C for 1 hr.

Diisopropylamine (91 uL) and chlorotrimethylsilane (4O uL) were added thereto, and the mixture was d for 1 hr. rmore, a solution of S—potassium thioacetate (92 mg) in N,N—dimethylformamide (2.5 mL) was added thereto at -10°C, potassium carbonate (211 mg) was added thereto, and the mixture was stirred at room temperature overnight. Water was added to the reaction mixture, the mixture was extracted with a mixed solvent of ethyl e and hexane (1:1), and the c layer was washed with ted brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was dissolved in methanol (1 mL), methyl 4— tanoate (72 mg) and potassium carbonate (86 mg) were added thereto, and the mixture was stirred at room temperature for 1.5 hr. Thereafter, a saturated aqueous um de solution was added thereto, the mixture was extracted with tert—butylmethylether, dried over anhydrous sodium sulfate, and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexanezethyl acetate = 4:1 — 1:1) to give the title compound (71 mg). 1H NMR (300 MHz, CDC13) 5 5.55 (m, 2H), 4.68 (m, 2H), 4.30—3.70 (m, 5H), 3.67 (s, 3H), 3.46 (m, 2H), 2.60—2.40 (m, 4H), 2.23 (m, 2H), 2.10—1.40 (m, 26H), 1.13 (t, J = 6.9 Hz, 3H), 0.96 (m, 3H).

Example 1: methyl ((1R,2R,3R)—3—hydroxy—2—((1E,3RS,4S)—3— hydroxy—4—methylnon—1—en—6—ynyl)~5— oxocyclopenty1)ethyl)thio)butanoate und (1)—1] id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171" id="p-171"

[0171] COZMe‘ HQ / THPév oT?p To methyl 4—((2—((1R,2R,3R,58)—5—hydroxy((1E,3RS,4S)— 4—methyl—3-((tetrahydro—2H—pyran-2—yl)oxy)non—1—en—6-yn-1—yl)— 3—((tetrahydro—2H-pyran—2— yl)oxy)cyclopentyl)ethyl)thio)butanoate (70 mg) synthesized in Reference Example 13 were added ethyl acetate (0.8 mL) and N,N- diisopropylethylamine (0.15 mL), a on of SO3-pyridine (63 mg) in dimethylsulfoxide (0.67 mL) was slowly added thereto at 0°C, and the mixture was stirred for 20 min. Thereafter, the mixture was diluted with ethyl acetate, and partitioned by adding water. The organic layer was washed with 1N hydrochloric acid and saturated aqueous sodium hydrogen carbonate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexanezethyl acetate = 93/7 - 20/80) to give the corresponding 5-oxo—bis THP ether form (52 mg). To the 5-oxo—bis THP ether form (52 mg) were added THF (0.2 mL) and 65% acetic acid (3.6 mL), and the mixture was stirred at 45°C for 1 hr, diluted with water, and extracted with a mixed solvent of hexane and ethyl e (1:1). The organic layer was dried over anhydrous sodium sulfate and dried under d pressure, and the residue was purified by silica gel column chromatography e:ethyl acetate = 50:50 — 35:65) to give the title compound (29 mg). 1H NMR (300 MHz, CDC13) 5 5.64 (dddd, J = 15.1, 15.1, 8.0, 6.9 Hz, 2H), .03 (m, 2H), 3.70 (s, 1H), 3.68 (s, 2H), 2.76 (dd, J = 7.5, 6.6 Hz, 1H), 2.62 (dt, J = 7.2, 3.2 Hz, 2H), 2.51 (t, J = 7.4 Hz, 2H), 2.43 (t, J = 7.4 Hz, 2H), 2.39—2.10 (m, 7H), 2.10—1.61 (m, 7H), 1.12 (t, J = 7.5 Hz, 3H), 0.97 (d, J = 6.6 Hz, 3H). id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173" id="p-173"

[0173] Example 2: methyl (2E)—4—((2—((1R,2R,3R)—3—hydroxy—2— ((1E,3RS,4S)—3—hydroxy—4—methy1non-1—en—6—yn—1-yl)-5— oxocyclopentyl)ethy1)thio)but-2—enoate [compound (1)—2] THPG" .oTHp The title compound was obtained by synthesis in the same manner as in Reference Example 13 and Example 1 by using methyl 4—bromo—2—butenoate d of methyl 4-iodobutanoate from 2— ((18,2R,3R,58)~5—hydroxy—2—((1E,3RS,4S)-4—methyl—3~ ((tetrahydro—ZH—pyran—2~yl)oxy)non~1—en—6-yn-1—yl)—3— ((tetrahydro—ZH—pyran-Z-yl)oxy)cyclopentyl)ethanol synthesized in Reference Example 12. 1H NMR (300 MHz, CDCl3) 5 6.86 (ddd, J = 15.6, 7.6, 7.6 Hz, 1H), 6.07 (dt, J = 15.6, 9.5 Hz, 1H), 5.92—5.56 (m, 2H), 4.30—4.00 (m, 2H), 3.75 (s, 3H), 3.60—3.00 (m, 2H), 2.90—2.70 (m, 2H), 2.70—2.08 (m, 9H), 2.05—1.64 (m, 4H), 1.13 (t, J = 7.2 Hz, 3H), 1.02—0.95 (m, 3H).

Example 3: methyl ((1R,2R,3R)—3—hydroxy((1E,3RS,4S)—3- hydroxy—4—methylnon—1—en—6—yn—1—y1)—5—oxocyclopentyl)heptanoate [compound (1)—3] Methyl 7~((lR,2R,3R,SS)~5~acetoxy—2-((lE,4S)methyl—3— oxonon—l—en—6—yn—1—yl)~3—((tetrahydro—ZH-pyran—Z— yl)oxy)cyclopentyl)heptanoate (44 mg) synthesized in Reference Example 10 was dissolved in methanol (0.5 mL), cerium chloride heptahydrate (9.5 mg) and sodium dride (1.9 mg) were added thereto under ice—cooling, and the mixture was stirred at room temperature-for 30 min. The reaction mixture was diluted with ethyl acetate, ioned by adding a saturated aqueous ammonium chloride solution, and the aqueous layer was extracted with ethyl acetate. The c layers were combined, dried over anhydrous ium sulfate, and concentrated under reduced pressure. The residue was dissolved in methylene chloride (1 mL), 3,4—dihydro—2H—pyran (10.5 uL) and p— esulfonic acid drate (0.73 mg) were added thereto at 0°C, and the mixture was stirred at the same temperature for 1 hr. The on mixture was partitioned by adding ethyl acetate and saturated aqueous sodium hydrogen carbonate, and the aqueous layer was extracted with ethyl acetate. The organic layers were combined, dried over anhydrous magnesium e, and trated under reduced pressure. To the residue were added methanol (0.5 mL) and potassium carbonate (10.6 mg), and the mixture was stirred at room.temperature for 16 hr. The reaction mixture was partitioned by adding ethyl acetate and a saturated aqueous ammonium chloride solution, and the aqueous layer was extracted with ethyl acetate, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexanezethyl acetate = 84:16 - 50:50) to give methyl 7-((1R,2R,3R,5S)—2—((1E,3RS,4S)—4—methyl—3—((tetrahydro— 2H—pyran—2—yl)oxy)non—1—en—6—yn—1—yl)—5—hydroxy—3—((tetrahydro— 2H—pyran—2—yl)oxy)cyclopentyl)heptanoate (33 mg). The obtained compound was treated in the same manner as in Example 1 to give the title compound. 1H NMR (300 MHz, CDC13) 6 5.75—5.55 (m, 2H), 4.22—3.98 (m, 2H), 3.66 (s, 3H), 2.75 (dd, J = 18.4, 7.2 Hz, 1H), 2.43—1.28 (m, 22H), 1.12 (t, J = 7.3 Hz, 3H) 0.97 (d, J = 6.9 Hz, 3H). e 4: 7—((1R,2R,3R)-2—((1E,3S,4S)—7~cyclopropyl—3—hydroxy— 4—methylhept—1~en—6—yn—1—yl)—3—hydroxy—5— oxocyclopentyl)heptanoic acid [compound (1)—9] 1) 0‘03, H2804 aq aCMOne 2) 65% AcOH,‘ THF THP5 éWHP 7—((1R,2R,3R,5S)—2—((1E,3S,4S)—7—cyclopropyl-4—methyl—3— ((tetrahydro—2H—pyran—2—yl)oxy)hept—1—en—6—yn—1—yl)—5—hydroxy— 3—((tetrahydro—ZH-pyran—Z—yl)oxy)cyclopentyl)heptanoic acid (70.9 mg) synthesized in Reference e 7 was dissolved in acetone, and 2.67 M Jones t (70.8 uL) was added dropwise thereto at —20°C. The mixture was stirred at the same temperature for 30 min. Then, the Jones reagent (7.1 uL) was added thereto, and the mixture was further stirred for 10 min.

The reaction mixture was partitioned by adding 2—propanol (0.15 mL), diethyl ether (10 mL) and water (6 mL). The aqueous layer was extracted with diethylether, and the organic layers were combined, washed successively with water and brine, dried over anhydrous magnesium e, and concentrated under reduced pressure to give oxo—bis THP ether form (53.7 mg) as a crude product.

The ed oxo—bis THP ether form as a crude product (53.7 mg) was dissolved in THF (0.252 mL), a 65% aqueous acetic acid solution (2.52 mL) was added thereto, and the mixture was stirred at 45°C for 2 hr and at room temperature for 1 hr.

Water was added to the reaction mixture, and the mixture was extracted with ethyl e. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and trated under reduced pressure. The residue was purified by silica gel column chromatography e:ethyl acetate = 1:2 — ethyl acetate alone - ethyl acetatezmethanol = :1) to give the title compound (29.5 mg). 1H NMR (400 MHz, CDC13) 5 5.69 (dd, J = 15.2, 7.6 Hz, 1H), .60 (dd, J = 15.2, 8.8, 1H), 4.13—4.03 (m, 2H), 2.75 (dd, J = 18.4, 7.2 Hz, 1H), 2.43—1.20 (m, 22 H), 0.94 (d, J = 6.4 Hz, 3H), 0.75—0.71 (m, 2H), 0.63—0.59 (m, 2H).

Example 5: (2E)—7—((1R,2R,3R)—2—((1E,3S,4S)~7—cyclopropyl—3— hydroxy—4—methylhept—1—en—6—yn—1—yl)—3—hydroxy—5— oxocyclopentyl)hept—2—enoic acid [compound ] ICOZH \" 1) Grog... H2804 m-----——--———-—)~, 2)654AcOHaq // ;_ THPC‘: I 5TH? id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184" id="p-184"

[0184] The title compound was synthesized by Jones oxidation followed by deTHP reaction in the same manner as in Example 4 by using (2E)—7—((1R,2R,3R,SS)((1E,3S,4S)cyclopropyl—4— methyl—3-((tetrahydro—2H—pyran—2—yl)oxy)hept—1—en—6—yn—1—y1)~5— hydroxy—3-((tetrahydro—2H—pyran~2—yl)oxy)cyclopentyl)hept—2— enoic acid synthesized in Reference Example 9. Yield: 66.4%. 1H NMR (400 MHz, CDC13) 5 6.98 (dt, J = 15.6, 6.9 Hz, 1H), .98 (brs, 2H), 5.77 (d, J = 15.6 Hz, 1H), 5.58 (dddd, J = 15.3, .3, 7.4, 6.8 Hz, 2H), .93 (m, 2H), 2.71 (dd, J = 18.2, 7.4 Hz, 1H), 2.40—1.00 (m, 16H), 0.89 (d, J = 6.8 Hz, 3H), 0.71—0.67 (m, 2H), 0.59—0.55 (m, 2H).

Example 6: 7—((1R,2R,3R)-3—hydroxy—2—((1E,3S,4S)—3—hydroxy—4— methylnon-l—en—6—yn—1—yl)—5—oxocyclopentyl)heptanoic acid [compound (1)—6] THPd of The title compound was synthesized in the same manner as in Reference Example 6, Reference Example 7 and Example 4 from methyl 7-((1R,2R,3R,5$)-5—acetoxy—2—((1E,4S)—4—methyl-3—oxonon— 1-en—6—yn—1—yl)—3—((tetrahydro—ZH—pyran—Z— yl)oxy)cyclopentyl)heptanoate synthesized in Reference Example 1H NMR (400 MHz, CDCl3) 5 5.65 (dddd, J = 15.3, 15.3, 8.3, 7.2 Hz, 2H), 4.12—4.01 (m, 2H), 2.74 (dd, J = 18.0, 7.2 Hz, 1H), 2.45—1.96 (m, 11H), 1.79 (m, 1H), 1.50—1.40 (m, 4H), 1.40—1.30 (m, 7H), 1.13 (t, J = 6.9 Hz, 3H), 0.96 (d, J = 6.9 Hz, 3H).

Example 7: (2E)—7—((1R,2R,3R)—3—hydroxy—2—((1E,3S,4S)—3— y—4-methylnon—1—en—6—yn—1—yl)—5—oxocyclopentyl)hept-2— enoic acid [compound (1)-7] COzMe: COzH The title nd was synthesized in the same manner as in Reference Example 6, Reference Example 7, Reference Example 8, Reference e 9 and Example 5 from methyl 7— ((1R,2R,3R,58)acetoxy—2—((1E,4S)methyl—3—oxonon-1—en—6— yn—1—yl)—3—((tetrahydro—ZH—pyran—Z- )cyclopentyl)heptanoate synthesized in Reference Example 1H NMR (300 MHz, CDCl3) 5 7.01 (dt, J = 15.4, 7.0 Hz, 1H), .80 (d, J = 15.4 Hz, 1H), 5.62 (dddd, J = 15.3, 15.3, 8.2, 7.7 Hz, 2H), 4.08—3.80 (m, 2H), 2.73 (dd, J = 18.3, 7.5 Hz, 1H), 2.46-1.70 (m, 11H), 1.87—1.30 (m, 8H), 1.14 (t, J = 7.4 Hz, 3H), 0.94 (t, J = 6.9 Hz, 3H).

Example 8: (5—methyl—2—oxo—1,3-dioxol—4-yl)methyl 7— ((lR,2R,3R)—3~hydroxy—2—((1E,3S,4S)—3—hydroxy-4—methylnon—1—en— 6—yn-1—yl)oxocyclopentyl)heptanoate [compound (1)—4] m—"\>==?{- COZH o "0 o §e?#/~*{/‘~/, 1)DBU.Nm \E; // m65%Ac0H J LH', THPGV éTHP The oxo—bis THP ether form (250 mg) obtained as an intermediate in Example 6 in the same manner as in Example 4 was dissolved in acetone (4.5 mL), and 4—chloromethyl—5—methyl— 1,3—dioxol—2—one (20.8 mg) was added dropwise thereto at 0°C.

Sodium iodide (68.4 mg) and 1,8—diazabicyclo[5.4.0]undec—7—ene (82.2 mg) were added thereto, and the mixture was stirred at the same temperature for 21 hr. To the reaction e were added diethylether and saturated aqueous sodium hydrogen carbonate, and the s layer was ted with diethylether, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column tography (hexane alone — hexanezethyl acetate = 16:84 — ethyl acetate alone - ethyl acetatezmethanol = 98:2) to give ester form (278 mg). Then, THF (0.95 mL) and a 65% aqueous acetic acid solution (9.5 mL) were added to the obtained ester form (278 mg), and the mixture was stirred at 45°C for 1 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The c layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate = 3:1 — 1:5 — ethyl acetate alone - ethyl e:methanol = 50:1) to give the title compound (168.2 mg). 1H NMR (300 MHz, CDCl3) 5 5.64 (dddd, J = 15.2, 15.2, 8.4, 7.1 Hz, 2H), 4.83 (s, 2H), 4.13—3.99 (m, 2H), 2.74 (dd, J = 17.7, 7.5 Hz, 1H), 2.46—1.94 (m, 11H), 1.85-1.19 (m, 14H), 1.13 (d, J = 7.4 Hz, 3H), 0.95 (d, J = 4.2 Hz, 3H). id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194" id="p-194"

[0194] Example 9: 3,3—dimethyl-2—oxobutyl 7—((1R,2R,3R)—3—hydroxy—2— ((1E,3S,4S)—3—hydroxy—4—methylnon—1—en-6—yn—1—yl)—5— oxocyclopentyl)heptanoate [compound (1)—5] COZH 1)- ~""/~\¢/.- c:- v o __ oE 'DBULNm , 2 .AQOH aq __- ; THPG éTHP The oxo—bis THP ether form (200.9 mg) obtained as an intermediate in Example 6 in the same manner as in Example 4 was dissolved in acetone (3.7 mL), and 1—chloropinacolone (28.2 mg), sodium iodide (14 mg) and 1,8—diazabicyclo[5.4.0]undec—7— ene (16.6 mg) were added thereto at 0°C, and the mixture was stirred at the same temperature for 17 hr. To the reaction mixture were added lether and saturated aqueous sodium hydrogen carbonate, and the aqueous layer was extracted with diethylether. The organic layer was dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column tography (hexane alone - hexane:ethyl acetate = 16:84 — ethyl acetate alone — ethyl e:methanol = 95:5) to give ester form (163.6 mg). Then, THF (0.95 mL) and a 65% aqueous acetic acid solution (9.5 mL) were added to the obtained ester form (21.6 mg), and the mixture was stirred at 45°C for 2.5 hr. Water was added to the on mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography e:ethyl acetate = 3:1 — ethyl acetate alone) to give the title compound (116.6 mg). 1H NMR (300 MHz, CDC13) 5 .57 (m, 2H), 4.88 (s, 2H), 4.18—4.00 (m, 2H), .68 (m, 1H), 2.46—1.95 (m, 10H), 1.85— 1.17 (m, 12H), 1.21 (d, J = 4.7 Hz, 9H), 1.14 (dt, J = 7.4, 4.7 Hz, 3H), 0.97 (dd, J = 6.9, 4.5 Hz, 3H).

Example 10: 2,2—difluoro—7-((1R,2R,3R)—3—hydroxy—2—((1E,3S,4S)— 3—hydroxy-4—methylnon-l—en—6—yn-1—yl)—5— oxocyclopentyl)heptanoic acid [compound (1)—8] COZMe <::1\~/OH ":::::::::::::::2;.

Tnpé The title compound was sized in the same manner as in Reference Example 4 — Reference Example 7 and Example 4 from methyl 7—((1R,2R,3R,5S)-5—acetoxy-2—hydroxymethyl ((tetrahydro—ZH—pyran-Z—yl)oxy)cyclopentyl)-2,2— difluoroheptanoate synthesized in Reference Example 11. 1H NMR (400 MHz, CDC13) 6 5.60 (dddd, J = 15.2, 15.2, 8.4, 7.4 Hz, 2H), 4.03 (dd, J 17.2, 8.4 Hz, 1H), 3.97 (t, J 7.6 Hz, 1H), 2.86—2.65 (m, 1H), 2.51—1.88 (m, 9H), 1.74 (m, 1H), 1.72—1.17 (m, 11H), 1.12 (t, J = 7.4 Hz, 3H), 0.94 (d, J = 6.8 Hz, 3H). 19}? NMR (282.65 M Hz, CD3OD) 5 -106.42 (t, J = 15.4 Hz, 2F). id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200" id="p-200"

[0200] Preparation Example 1: Production of tablet 1) compound (1) 0.003 g 2) lactose 50 g 3) cornstarch 15 g 4) calcium carboxymethylcellulose 44 g ) magnesium stearate 1 g 1000 tablets total 3 g The total amount of 1), 2), and 3) and 30 g of 4) are kneaded with water, vacuum dried and sieved. The sieved powder is mixed with 14 g of 4) and 1 g of 5), and the mixture is punched by a tableting machine. In this manner, 1000 tablets containing 3 pg of the Example compound per tablet are obtained.

Preparation Example 2: Production of capsule 1) compound (1) 0.003 g 2) fine powder cellulose 10 g 3) lactose 19 g 4) magnesium te 1 g total 30.003 g 1), 2), 3) and 4) are mixed and filled in gelatin capsules to give 1000 capsules containing 3 ug of the Example nd per capsule.

Experimental e 1: Evaluation of human platelet aggregation tory action in vitro (1) Preparation of human platelet-rich plasma Using 3.8 w/v% sodium citrate as an anticoagulant, blood samples were collected from human brachial vein at a ratio of sodium citrate solutionzblood (volume ratio) = 1:9, and an upper layer of platelet—rich plasma (PRP) was collected by fugation (12OXg, 10 min).. Platelet poor plasma (PPP) was prepared from PRP-free blood by centrifugation (17OOXg, 10 min).. The number of platelets in PRP was measured and adjusted to 25X1O4/ uL by diluting with PPP. (2) Measurement of platelet aggregation ability The platelet aggregation y was measured by a platelet aggregometer (PRP313 M, IMI Co., Ltd.) according to the method of Born (Nature, 1962, vol. 194, pp.927-929). PRP (190 uL) was placed in a glass cuvette and mounted on the platelet aggregometer. Then, 5 uL of the compound of the t invention, limaprost (positive control substance) or vehicle control (0.25 vol% dimethyl sulfoxide [DMSO]) was added as a test substance, and the mixture was incubated at 37°C for min. ADP (LMS Co., Ltd.) (5 uL) as a platelet aggregation agent was added at 3 umol/L in a final concentration to cause aggregation, and the maximum response of the aggregation was measured. (3) Evaluation of inhibitory action on platelet ation The aggregation inhibition ratio of a test substance was determined by ng the maximum ation ratio of l as 100%, and ICw value was determined by using "Dx calculation (linear fitting): git transformation" of SAS System n 9.1.3 (Stat Preclinica Client Ver. 1.1 SAS Institute Japan, Ltd.). Furthermore, the relative activity (%) of each test substance was calculated by defining the activity of 1C" value of limaprost as 100.

The results are shown in Table 1. As shown in Table 1, the compound of the present invention exhibited a very potent activity in the human platelet aggregation inhibitory action test in vitro, and some of them exhibited activity not less than 10—fold that of limaprost.

[Table 1] Test substance Relative activity (%) compound( compound compound (l)—7 compound Experimental Example 2: Evaluation of inhibitory action on rat platelet aggregation in vitro (1) Preparation of rat platelet—rich plasma In the same manner as in the above—mentioned Experimental Example l(l), blood samples were collected from the abdominal artery of 8— to 9—week—old male SD rats. PRP was diluted with PPP and the number of platelet was adjusted to 63.ZXl04/uL. (2) Measurement of platelet aggregation ability In the same manner as in the above-mentioned Experimental e 1(2) except that the final concentration of ADP was 2 umol/L, the nd of the present ion, prostaglandin El (PGElzpositive control substance) or vehicle control was added as a test substance, and the maximum response of aggregation was measured. id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208" id="p-208"

[0208] (3) Evaluation of platelet aggregation inhibitory action In the same manner as in the above—mentioned Experimental Example 1(3), ICw values were ined from the aggregation inhibition ratio of the test nce, and the relative activity (%) of each test substance was calculated by defining the activity of ICw value of PGE1 as 100.

The results are shown in Table 2. The compound of the t invention showed a potent activity in the rat platelet aggregation inhibitory action test in vitro. All of compounds (1)—1 to (1)—3 as test substances are diastereomeric mixtures of R form and S form of the stereochemistry of the hydroxy group on the w—chain. Therefore, when only the effective active form (one of the diastereomers) is separated from the mixture and the above—mentioned test is med, the activity may be almost doubled. id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209" id="p-209"

[0209] [Table 2] Test substance Relative activity (%) compound (1)—1 compound (1)—2 compound (1)—3 compound (1)—8 Experimental Example 3: tion of persistent inhibitory action on guinea pig platelet ation ex vivo (1) Measurement of ICw value As a test substance, a single oral dose of the compound of the present invention (3 doses of 79, 132 and 263 nmol/kg), limaprost (positive control nce: 3 doses of 79, 263 and 789 nmol/kg) or vehicle control (water for injection containing 0.26 vol% DMSO) was administered at 10 mL/kg to 4- to 10+week—old male Hartley guinea pigs. Blood s were collected from the abdominal artery 4 hr later, platelet aggregation ability was measured, and the ICm value was calculated from the aggregation inhibitory activity (aggregation was induced by 0.5 umol/L ADP) in the same manner as in the above—mentioned mental Example 1(3). (2) Administration of test nce and preparation of platelet—rich plasma A single oral dose showing the ICm value determined. in the above—mentioned test (1) of compound (1)—7 (168 nmol/kg), compound (1)—9 (178 nmol/kg), compound (1)-1O (187 nmol/kg) or limaprost (266 nmol/kg) was administered. Blood samples were collected from the abdominal artery of the guinea pig at 1, 2, 4, 6, 10, 16 and 24 hr later. PRP was diluted with PPP and the number of platelet was adjusted to about 60X104/uL in the same manner as in the above—mentioned Experimental Example 1(1) (n=3 — 4). (3) Measurement of platelet aggregation In the same manner as in the above—mentioned Experimental Example 1(2), the platelet aggregation ability was measured ing to the method of Born. PRP (190 uL) was placed in a glass cuvette, mounted on the platelet aggregometer and incubated at 37°C for 10 min. ADP (10 uL) as platelet aggregation agent was added at 0.5 umol/L in a final concentration to cause aggregation, and the maximum reaction of the aggregation was measured. (4) Evaluation of persistent inhibitory action on platelet aggregation The maximum aggregation inhibition ratio of the test substance based on the m aggregation inhibition ratio of the control group as 0% was determined from the maximum coagulation ratio of the l group and the maximum coagulation ratio of the test substance when ICw values were ated. Furthermore, in a graph showing time course changes of the maximum aggregation inhibition ratio, wherein the vertical axis shows the m aggregation tion ratio (%) and the horizontal axis shows time (hr) after administration of test substance, the area of the part surrounded by the line connecting the points of the maximum aggregation inhibition ratios plotted at each measurement time and the horizontal axis was determined as AUC. In on, the d time at which the maximum aggregation inhibition ratio became 0% on the graph was determined as the time at which inhibition of aggregation disappeared (inhibition 0 hr).

The results are shown in Table 3. As shown in Table 3, in the guinea pig platelet aggregation tory action test ex vivo, the compounds of the present invention showed higher AUG values from 1 hr after administration to inhibition 0 hr (AUC: l—inhibition 0 hr) than limaprost did. It was confirmed that the nds of the present invention had a more potent platelet aggregation inhibitory action than limaprost did.

When the maximum aggregation inhibition ratio after 6 hr from the administration as an index of persistent activity was evaluated, the compounds of the present invention showed higher AUC values from 6 hr after administration to tion 0 hr (AUC: 6—inhibition 0 hr) and a longer time up to the disappearance of inhibitory of aggregation (inhibition 0 hr) in comparison with limaprost. It was therefore confirmed that the compounds of the present ion are superior to ost in the persistent efficacy.

[Table 3] AUC:1— AUC:6— Test Inhibition 0 hr inhibition 0 hr inhibition 0 hr substance (hr) (% relative to (% relative to limaprost) limaprost) compound (1)-7 compound (l)-9 compound (l)—1O limaprost Experimental Example 4: Evaluation of increasing effect on rat cauda equine blood flow (1) Administration of test substance The compound of the present invention or limaprost (positive control substance) as a test substance was injected at 0.263, 0.789 and 2.63 nmol/kg in ple to Slc:Wistar male rats (body weight: about 200 — 250 g) from the tail vein at a flow rate of 0.2 mL/min for 10 min with an on pump (model 11, Harvard Apparatus). A vehicle (1 vol% DMSO— physiological saline) was similarly injected to the l group (5 — 6 mice in each group). (2) ement of cauda equine blood flow The rats were fixed in a prone position under halothane anesthesia and kept warm by a heater (Nippon Medical & Chemical Instruments Co., Ltd.). The lower back of the rats was shaved, dissected to expose the spine, the vertebral arch of the fifth lumbar vertebra was excised and cauda equina was exposed. The cauda equine blood flow was measured by a laser Doppler blood flow meter (TBF—LNl, Unique Medical Co., Ltd.) via a non— contact type probe (LP—NC special type, Unique Medical Co., Ltd.) fixed perpendicularly to a position of the exposed cauda equina upper by about 1 mm from before administration of each test substance until 60 min after the administration. The open wound was filled with liquid paraffin to prevent drying of the exposed cauda . (3) Data analysis The obtained data was taken into a personal er via PowerLab8/3O tered trade mark, ML870, ADInstruments) every 1/400 second, and analyzed using LabChart (registered trade mark, ADInstruments). The analysis time points were before administration (administration 0 min), and 3, 5, 8, 10, 13, 15, 18, 20, 30, 40, 50 and 60 min after administration, or before administration (administration 0 min), and 3, 5, 10, 15, , 30, 40, 50 and 60 min after administration. The mean value for 10 seconds at each time point was taken as the measurement value, and the change rate (%) relative to the value before administration was obtained by the following equation.

The rate of change (%) = (measurement value at each time point after administration — measurement value before administration)/measurement value before administration X 100 Furthermore, difference in the rate of change (%) relative to the control group at each time point [A change rate (%)] was calculated by the following equation, and the maximum value of the A change rate was taken as the m change rate.

A change rate (%) = change rate of each individual at each time point — mean of change rate of control group From the maximum change rate at each dose of the test substance, the dose at which the cauda equine blood flow increases by 20% (EDm value) was determined by linear sion equation, and the relative activity (%) of each test substance was calculated based on the activity of EDm value of limaprost as 100.

The results are shown in Table 4. The compounds of the present invention ted a potent activity in the rat cauda equine blood flow test.

[Table 4] Test nce Relative activity (%) compound( )—9 nd (l)—lO limaprost [Industrial Applicability] The prostaglandin derivative of the present invention is useful as an active ingredient of a medicament. A medicament containing the prostaglandin tive of the present invention as an active ingredient is useful as a medicament for the prophylaxis or treatment of blood flow disorders, particularly, a medicament for the prophylaxis or treatment of a blood flow disorder associated with spinal canal is or chronic arterial occlusion.

This application is based on a patent application No. 2016—094196 filed in Japan, the contents of which are incorporated in full herein.

Claims

1. A compound represented by the following formula (1) or a pharmaceutically acceptable salt thereof; wherein RA is -CH2-CZ 1Z2(COX) or -CH=CZ1(COX), Z1 and Z2 are each independently a hydrogen atom or a fluorine atom, X is OR4 or NR5R6, R4 is a en atom, an alkyl group having 1 - 6 carbon atoms or 10 a substituted alkyl group having 1 - 6 carbon atoms, R5 is a en atom, an alkyl group having 1 - 6 carbon atoms or a substituted alkyl group having 1 - 6 carbon atoms, R 6 is a hydrogen atom, an alkyl group having 1 - 6 carbon atoms, a substituted alkyl group having 1 - 6 carbon atoms, an ulfonyl group having 1 - 15 6 carbon atoms, a substituted alkylsulfonyl group having 1 - 6 carbon atoms, an arylsulfonyl group having 6 - 10 carbon atoms or a substituted arylsulfonyl group having 6 - 10 carbon atoms; Y is CH2, S or O; A-B is a carbon-carbon single bond or a carbon-carbon double 20 bond; a hydroxy group bonded by a wavy line is a hydroxy group having a-configuration, ß-configuration or a mixed configuration of iguration and ß-configuration; R1 and R2 are each independently a hydrogen atom, an alkyl 25 group having 1 - 3 carbon atoms or a substituted alkyl group having 1 - 3 carbon atoms; n is an integer of 0 - 2; R3 is an alkyl group having 2 - 3 carbon atoms or a cycloalkyl group having 3 - 5 carbon atoms; 30 the substituent of the substituted alkyl group having 1 - 6 carbon atoms or the substituted alkyl group having 1 - 3 carbon atoms is selected from the group consisting of halogen atom, y group, alkoxy group, halogenated alkoxy group, acyl group, acyloxy group, halogenated acyloxy group, alkylsulfonyloxy group, 5 halogenated alkylsulfonyloxy group, arylsulfonyloxy group, arylsulfonyloxy group substituted halogenated alkyl group, alkoxycarbonyloxy group, amino group, tuted amino group, aryl group and cyclic group; the substituent of the substituted alkylsulfonyl group having 10 1 - 6 carbon atoms is halogen atom; the substituent of the substituted arylsulfonyl group having 6 - 10 carbon atoms is selected from the group ting of halogen atom, alkyl group, halogenated alkyl group, and alkoxy group; 15 the substituent of the substituted amino group is selected from the group consisting of alkyl group having 1 - 6 carbon atoms, alkoxy group having 1 - 6 carbon atoms, alkenyl group having 2 - 6 carbon atoms, alkynyl group having 2 - 6 carbon atoms, aryl group having 6 - 10 carbon atoms, monovalent heterocyclic group, aralkyl 20 group having 7 - 14 carbon atoms, benzhydryl group, trityl group, acyl group and tri-organosilyl group, and when the substituent of the tuted amino group is a group containing a en atom, one or more of the hydrogen atoms may be further substituted by a substituent selected from the group consisting of n atom, 25 alkyl group having 1 - 6 carbon atoms, alkoxy group having 1 - 6 carbon atoms, alkoxycarbonyl group having 1 - 6 carbon atoms, cyano group and nitro group.

2. The compound or a pharmaceutically acceptable salt thereof 30 according to claim 1, wherein Y is CH2.

3. The compound or a pharmaceutically acceptable salt thereof according to claim 1 or 2, wherein RA is -CH=CZ1(COX). 35

4. The compound or a pharmaceutically acceptable salt thereof ing to claim 1 or 2, wherein RA is -CH2-CZ 1Z2(COX).

5. The compound or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 4, wherein n is 1.

6. The compound or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 5, wherein A-B is a carbon double bond. 10

7. The compound or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 6, wherein R1 is a hydrogen atom and R2 is an alkyl group having 1 - 3 carbon atoms.

8. The compound or a pharmaceutically acceptable salt thereof 15 according to any one of claims 1 to 7, wherein R3 is a cycloalkyl group having 3 - 5 carbon atoms.

9. The compound or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 8, wherein X is OR4.

10. A cyclodextrin clathrate compound of the compound or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 9. 25

11. A medicament comprising the nd or a ceutically acceptable salt thereof according to any one of claims 1 to 9, or the cyclodextrin clathrate compound according to claim 10 as an active ingredient. 30

12. The medicament according to claim 11, which is a prophylactic or eutic agent for a blood flow disorder.

13. The medicament according to claim 12, wherein the blood flow disorder is a blood flow disorder of nerve.

14. The medicament according to claim 13, n the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis. 5

15. The medicament according to claim 12, wherein the blood flow disorder is a blood flow disorder of peripheral artery, skin or brain.

16. The medicament according to claim 15, wherein the blood flow 10 disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary hypertension.

17. The medicament according to claim 15, wherein the blood flow disorder of skin is a blood flow disorder associated with re 15 ulcer.

18. The medicament according to claim 15, wherein the blood flow disorder of brain is a blood flow disorder associated with suppression of recurrence after cerebral tion.

19. Use of the compound or a pharmaceutically able salt thereof according to any one of claims 1 to 9, or the cyclodextrin clathrate compound according to claim 10 in the cture of a medicament for the prophylaxis or treatment of a blood flow 25 disorder.

20. The use according to claim 19, n the blood flow er is a blood flow disorder of nerve. 30

21. The use according to claim 20, wherein the blood flow disorder of nerve is a blood flow disorder associated with spinal canal stenosis.

22. The use according to claim 19, wherein the blood flow disorder 35 is a blood flow disorder of peripheral artery, skin or brain.

23. The use according to claim 22, wherein the blood flow disorder of peripheral artery is a blood flow disorder associated with chronic arterial occlusion or pulmonary hypertension.

24. The use according to claim 22, wherein the blood flow disorder of skin is a blood flow disorder associated with re ulcer.

25. The use according to claim 22, wherein the blood flow disorder 10 of brain is a blood flow disorder associated with suppression of recurrence after al tion.

26. The compound according to claim 1, substantially as herein described with reference to any one of the Examples thereof.