JPH07119208B2 - Naphthylthioalkylcarboxylic acid derivatives - Google Patents

Description

TECHNICAL FIELD The present invention relates to a general formula useful as an intermediate for the manufacture of pharmaceuticals. (R ¹ and R ² in the formula may be the same or different and each is a cycloalkyl group having 3 to 6 carbon atoms, an acyloxy group having 2 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 7 carbon atoms, and 3 carbon atoms. Is an alkenyloxy group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, R ³ is an alkyl group having 1 to 4 carbon atoms or a benzyl group, and m and n are 1, 2 or 3) And a naphthylthioalkylcarboxylic acid derivative.

More specifically, the present invention shows a cholecystokinin (hereinafter referred to as CCK) receptor antagonistic action, and is useful as a prophylactic and therapeutic agent for diseases such as irritable colitis, biliary dyskinesia, and acute pancreatitis. (In the formula, R ⁴ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a benzyl group, and R ¹ , R ² m and n have the same meanings as described above), and a naphthylsulfonylalkylcarboxylic acid derivative The present invention relates to a naphthylthioalkylcarboxylic acid derivative represented by the general formula (I), which is useful as an intermediate for the production of

Conventional technology CCK is gastrin, secretin
It is a typical gastrointestinal hormone along with, especially pancreatic exocrine stimulation,
It is known to be a hormone involved in gallbladder contraction and the like.

In recent years, research on CCK has been advanced, and C
The involvement of CK has been elucidated.

As a result, specific, competitive and reversible CCK receptor antagonists have come to be expected as preventive and therapeutic agents for diseases such as irritable colitis, biliary dyskinesia, and acute pancreatitis,
It is getting attention.

The object of the present invention is to have a CCK receptor antagonistic action, in the general formula (II) useful as a prophylactic and therapeutic agent for diseases such as irritable colitis, biliary dyskinesia, acute pancreatitis and the like. It is to provide a naphthylthioalkylcarboxylic acid derivative represented by the general formula (I), which is useful as an intermediate for the production of the naphthylsulfonylalkylcarboxylic acid derivative represented.

Means for Solving the Problems The naphthylsulfonylalkylcarboxylic acid derivative represented by the general formula (II) has a strong CCK receptor antagonistic action, and prevents diseases such as irritable colitis, biliary dyskinesia, and acute pancreatitis. And is useful as a therapeutic agent.

The naphthylthioalkylcarboxylic acid derivative represented by the above general formula (I) of the present invention is very easily and in good yield by oxidizing the naphthylthioalkylcarboxylic acid derivative with an appropriate oxidizing agent and hydrolyzing or hydrogenolyzing it as necessary. The compounds of the general formula (II) can be derived.

The naphthylthioalkylcarboxylic acid derivative represented by the general formula (I) of the present invention is a novel compound and can be produced as follows.

That is, the general formula A naphthylthioalkylcarboxylic acid derivative represented by the formula (R ³ has the same meaning as described above) or a reactive functional object derivative thereof, and a general formula (R ¹ , R ² m, and n in the formula have the same meanings as described above)
It can be produced by reacting with an amine represented by

The compound of the general formula (III) used as a starting material in the method for producing the compound of the general formula (I) of the present invention is a novel compound and can be produced as follows.

That is, the formula 2-naphthalenethiol represented by (A and B in the formula are each a cyano group or a carbon number of 2
A compound represented by the formula (1) to (5) or (A is an alkoxycarbonyl group having 2 to 5 carbon atoms and B is a carboxy group or an alkali metal salt thereof) in the presence of a Lewis base or a Lewis acid catalyst. In response to the general formula (A and B in the formula have the same meanings as described above), and can be obtained by hydrolysis and monoesterification by a suitable method, if necessary.

The naphthylthioalkylcarboxylic acid derivative represented by the general formula (I) of the present invention has an asymmetric carbon and has two kinds of optical isomers. Any mixture is included.

EFFECTS OF THE INVENTION The naphthylthioalkylcarboxylic acid derivative represented by the general formula (I) of the present invention is oxidized by using an appropriate oxidizing agent such as m-chloroperbenzoic acid, and is hydrolyzed or added as required. By hydrogenolysis, the naphthylsulfonylalkylcarboxylic acid derivative represented by the general formula (II) can be extremely easily and efficiently obtained.

As described above, the compound represented by the general formula (II) produced from the compound of the general formula (I) of the present invention has a CCK receptor antagonistic action, and is susceptible to irritable colitis, biliary dyskinesia, acute pancreatitis, etc. It is useful as a therapeutic agent for the disease.

For example, in a binding assay for CCK receptor in rat isolated pancreas using ¹²⁵ I-labeled CCK-8, 4- [N, N- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylsulfonyl) pentane was obtained. The acid exhibits 50% binding inhibition (IC ₅₀ ) at 1.1 × 10 ⁻⁷ molarity.

EXAMPLES The contents of the present invention will be described in more detail with reference to the following reference examples and examples. The melting points of the compounds in Reference Examples and Examples are all uncorrected.

Reference Example 1 4-Methoxycarbonyl-2- (2-naphthylthiomethyl) butyric acid 10.0 g of 2-naphthalenethiol and 6.8 ml of 2-methyleneglutaronitrile were dissolved in 150 ml of ethanol, and Triton B was added.
After adding 10 drops (40% methanol solution), the mixture was heated under reflux for 2 hours. The reaction mixture was concentrated under reduced pressure, extracted with chloroform, washed with water, and dried over anhydrous magnesium sulfate. After evaporating the solvent under reduced pressure, the residue was recrystallized from ethyl acetate-hexane to obtain 15.6 g of 2- (2-naphthylthiomethyl) glutaronitrile having a melting point of 52 to 55 ° C.

Elemental analysis value: (as C ₁₆ H ₁₄ N ₂ S) C% H% N% Calculated value 72.15 5.30 10.52 Measured value 71.98 5.24 10.41 IR (KBr): ν _CN 2245cm ⁻¹ NMR (CDC ¹ ₃ ) δ: 1.95 to 2.3 (2H, m), 2.4 ~ 2.7 (2H, m), 2.8 ~ 2.95
(1H, m), 3.13 (1H, dd, J = 7.1,13.7Hz), 3.30 (1H, dd, J
= 6.6,13.7Hz), 7.4 ~ 7.6 (3H, m), 7.75 ~ 8.0 (4H, m) 2- (2-naphthylthiomethyl) glutaronitrile 15.5
g was dissolved in 70 ml of acetic acid, 70 ml of concentrated hydrochloric acid was added, and the mixture was heated under reflux for 17 hours. The reaction solution was concentrated under reduced pressure, diethyl ether was added, insoluble materials were removed by filtration, washed with water, then an aqueous sodium hydrogen carbonate solution was added, and the mixture was shaken. The aqueous layer was acidified with hydrochloric acid, extracted with diethyl ether, washed with water and dried over anhydrous magnesium sulfate. After distilling off the solvent under reduced pressure, the residue was recrystallized from diethyl ether-hexane to give a melting point of 140-1.
42 ° C 2- (2-naphthylthiomethyl) glutaric acid 15.9
got g.

Elemental analysis value: (as C ₁₆ H ₁₆ O ₄ S) C% H% Calculated value 63.14 5.30 Measured value 63.37 5.34 IR (KBr): ν _{C = O} 1720 cm ^-1 NMR (DMS0-d ₆ ) δ: 1.7 to 2.0 (2H, m), 2.15 ~ 2.4 (2H, m), 2.5 ~ 2.65
(1H, m), 3.1 ~ 3.4 (2H, m), 7.35 ~ 7.6 (3H, m), 7.75 ~
8.0 (4H, m), 12.32 (2H, s) 2- (2-naphthylthiomethyl) glutaric acid 28.8 g was dissolved in 300 ml of methanol to give p-toluenesulfonic acid 0.9 g.
Was added and reacted at 40 ° C. for 2.5 hours with stirring. The reaction mixture was concentrated under reduced pressure, water was added to the residue, the mixture was extracted with ethyl acetate, washed with water, and dried over anhydrous magnesium sulfate. After distilling off the solvent under reduced pressure, the residue was recrystallized from isopropyl ether,
27.4 g of 4-methoxycarbonyl-2- (2-naphthylthiomethyl) butyric acid having a melting point of 70 to 71 ° C. was obtained.

Elemental analysis value: (as C ₁₇ H ₁₈ O ₄ S) C% H% Calculated value 64.13 5.70 Measured value 64.11 5.50 IR (KBr): ν _{C = 0} 1730,1700 cm ⁻¹ NMR (CDC ¹ ₃ ) δ: 1.95 to 2.2 (2H, m), 2.3 ~ 2.5 (2H, m), 2.65 ~ 2.8
(1H, m), 3.10 (1H, dd, J = 6.6, 13.2Hz), 3.33 (1H, dd, J
= 7.7, 13.2Hz), 3.62 (3H, s), 7.4 to 7.55 (3H, m), 7.7
-7.9 (4H, m) Reference Example 2 4-benzyloxycarbonyl-2- (2-naphthylthiomethyl) butyric acid 2- (2-naphthylthiomethyl) glutaric acid 14.0 g was dissolved in 180 ml of acetonitrile, and 57 ml of benzyl alcohol was added.
And 0.52 g of p-toluenesulfonic acid were added, and the mixture was heated under reflux for 23 hours. The reaction solution was concentrated under reduced pressure, and the residue was subjected to silica gel flash column chromatography (elution solvent:
After purification with methylene chloride / methanol = 70/1), recrystallization from ethyl acetate-hexane gave 4-benzyloxycarbonyl-2- (2-naphthylthiomethyl), melting point 94-95 ° C.
11.0 g of butyric acid was obtained.

Elemental analysis value: (as C ₂₃ H ₂₂ O ₄ S) C% H% Calculated value 70.03 5.62 Measured value 70.05 5.69 IR (KBr): ν _{C = 0} 1730,1700 cm ⁻¹ NMR (CDC1 ₃ ) δ: 1.9 to 2.2 (2H, m), 2.3 ~ 2.55 (2H, m), 2.65 ~ 2.8
(1H, m), 3.09 (1H, dd, J = 6.6, 13.2Hz), 3.26 (1H, dd, J
= 7.7, 13.2Hz), 5.09 (2H, s), 7.2 to 7.5 (8H, m), 7.65
-7.85 (4H, m) Example 1 Methyl 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylthio) pentanoate 4-methoxycarbonyl-2- (2-naphthylthio) 0.64 g of methyl) butyric acid was dissolved in 10 ml of dry methylene chloride, 0.3 ml of thionyl chloride was added, and the mixture was heated under reflux for 2 hours. The reaction solution was concentrated and dried under reduced pressure to obtain an oily residue. A solution of this residue in 5 ml of dry methylene chloride was added to 0.48 g of bis- (2-cyclohexylethyl) amine and 0.7 of triethylamine.
After adding dropwise to a solution of 15 ml of dry methylene chloride in 15 ml of ice-cooled solution, the mixture was reacted at room temperature for 20 hours. The reaction solution was washed successively with diluted hydrochloric acid, an aqueous solution of sodium hydrogen carbonate and water, and then dried over anhydrous magnesium sulfate. After distilling off the solvent under reduced pressure,
The residue was purified by silica gel medium pressure liquid column chromatography (eluting solvent: ethyl acetate / hexane = 1/2),
0.94 g of oily methyl 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylthio) pentanoate was obtained.

_{IR (neat): ν C =} 0 1735,1635cm -1 NMR (CDC1 3) δ: 0.3~1.75 (26H, m), 2.0~2.5 (4H, m), 2.85~3.4
(7H, m), 3.65 (3H, s), 7.35 ~ 7.55 (3H, m), 7.7 ~ 7.85
(4H, m) Example 2 In the same manner as in Example 1, the compounds in the table (oil) were produced.

Reference Example 3 Methyl 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylsulfonyl) pentanoate and 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] Methyl 5- (2-naphthylsulfonyl) pentanoic acid 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylthio) pentanoate 0.50 g was dissolved in 20 ml of dry methylene chloride and iced. 0.51 g of m-chloroperbenzoic acid (80%) was added little by little with stirring under cold conditions, and the mixture was reacted at room temperature for 6 hours. After adding sodium sulfite to the reaction solution, it was washed successively with an aqueous solution of sodium hydrogen carbonate and water and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was subjected to silica gel medium pressure liquid column chromatography (eluting solvent: ethyl acetate / hexane =
After purification with 1/2), recrystallized from ethyl acetate-hexane,
0.48 g of methyl 4- [N, N-bis (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylsulfonyl) pentanoate having a melting point of 115.5 to 118 ° C. was obtained.

Elemental analysis value: (as C ₃₃ H ₄₇ NO ₅ S) C% H% N% Calculated value 69.56 8.31 2.46 Measured value 69.51 8.22 2.33 NMR (CDC1 ₃ ) δ: 0.75 to 2.1 (28H, m), 2.32 (2H, t, J = 7.1Hz), 2.95
~ 3.45 (6H, m), 3.63 (3H, s), 3.84 (1H, dd, J = 7.7,13.
7Hz), 7.55 ~ 7.75 (2H, m), 7.8 ~ 8.1 (4H, m), 8.48 (1
H, s) 4- [N, N-bis- (2-cyclohexylethyl) carbamoyl] -5- (2-naphthylsulfonyl) pentanoate (150 mg) was dissolved in ethanol (3 ml), and 1N aqueous sodium hydroxide solution (0.26 ml) was added. Stirred at room temperature for 16 hours. The reaction solution was concentrated under reduced pressure, acidified with diluted hydrochloric acid, extracted with ethyl acetate, washed with water, and dried over anhydrous magnesium sulfate. After evaporating the solvent under reduced pressure, the residue was recrystallized from ethyl acetate-hexane to give 4- [N, N-melting point 138.5-139.5 ° C.
Bis- (2-cyclohexylethyl) carbamoyl]-
86 mg of 5- (2-naphthylsulfonyl) pentanoic acid was obtained.

Elemental analysis value: (as C ₃₂ H ₄₅ NO ₅ S) C% H% N% Calculated value 69.16 8.16 2.52 Measured value 69.22 8.28 2.48 NMR (CDC1 ₃ ) δ: 0.75 to 2.1 (28H, m), 2.37 (2H, t, J = 7.1Hz), 3.0
~ 3.35 (6H, m), 3.83 (1H, dd, J = 7.7, 13.7Hz), 7.55 ~
7.75 (2H, m), 7.8 ~ 8.05 (4H, m), 8.48 (1H, s)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Saka, Masaaki Saka 1-2-34 Nomizo Woodwork, Matsumoto-shi, Nagano Kissei Yakuhin Dairyo Dormitory (72) Inventor Toyohiro Kobayashi 3158 Nakagawate, Meishina-cho, Higashichikuma-gun, Nagano Prefecture Address Examiner Zenichi Wakimura

Claims (1)

[Claims] 1. A general formula (R ¹ and R ² in the formula may be the same or different and each is a cycloalkyl group having 3 to 6 carbon atoms, an acyloxy group having 2 to 5 carbon atoms, an alkoxycarbonyl group having 2 to 7 carbon atoms, and 3 carbon atoms. Is an alkenyloxy group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, R ³ is an alkyl group having 1 to 4 carbon atoms or a benzyl group, and m and n are 1, 2 or 3) Naphthylthioalkylcarboxylic acid derivatives.