JPS6153349B2 - - Google Patents
Info
- Publication number
- JPS6153349B2 JPS6153349B2 JP56125880A JP12588081A JPS6153349B2 JP S6153349 B2 JPS6153349 B2 JP S6153349B2 JP 56125880 A JP56125880 A JP 56125880A JP 12588081 A JP12588081 A JP 12588081A JP S6153349 B2 JPS6153349 B2 JP S6153349B2
- Authority
- JP
- Japan
- Prior art keywords
- thiadiazole
- reaction
- acid
- thiol
- amino
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 125000003277 amino group Chemical group 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- -1 5-substituted-1,3,4-thiadiazole-2-thiols Chemical class 0.000 description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 23
- 238000006243 chemical reaction Methods 0.000 description 14
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 6
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000010908 decantation Methods 0.000 description 5
- 238000007363 ring formation reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- YNNGZCVDIREDDK-UHFFFAOYSA-N aminocarbamodithioic acid Chemical compound NNC(S)=S YNNGZCVDIREDDK-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010511 deprotection reaction Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 150000003573 thiols Chemical class 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- JLAMDELLBBZOOX-UHFFFAOYSA-N 3h-1,3,4-thiadiazole-2-thione Chemical class SC1=NN=CS1 JLAMDELLBBZOOX-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- OTCCIMWXFLJLIA-UHFFFAOYSA-N N-acetyl-DL-aspartic acid Natural products CC(=O)NC(C(O)=O)CC(O)=O OTCCIMWXFLJLIA-UHFFFAOYSA-N 0.000 description 2
- OTCCIMWXFLJLIA-BYPYZUCNSA-N N-acetyl-L-aspartic acid Chemical compound CC(=O)N[C@H](C(O)=O)CC(O)=O OTCCIMWXFLJLIA-BYPYZUCNSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000006640 acetylation reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- JHCKVPVXWBVGDI-UHFFFAOYSA-N hydrazine;dihydrate Chemical compound O.O.NN JHCKVPVXWBVGDI-UHFFFAOYSA-N 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- NBNQOWVYEXFQJC-UHFFFAOYSA-N 2-sulfanyl-3h-thiadiazole Chemical compound SN1NC=CS1 NBNQOWVYEXFQJC-UHFFFAOYSA-N 0.000 description 1
- NJSRYBIBUXBNSW-UHFFFAOYSA-N 3-azaniumyl-4-oxo-4-phenylmethoxybutanoate Chemical compound OC(=O)CC(N)C(=O)OCC1=CC=CC=C1 NJSRYBIBUXBNSW-UHFFFAOYSA-N 0.000 description 1
- RBVFLRAWKORMNY-UHFFFAOYSA-N 4-(2-sulfanylidene-3h-1,3,4-thiadiazol-5-yl)butanoic acid Chemical compound OC(=O)CCCC1=NN=C(S)S1 RBVFLRAWKORMNY-UHFFFAOYSA-N 0.000 description 1
- 229930186147 Cephalosporin Natural products 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 1
- 125000003047 N-acetyl group Chemical group 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- HEMHJVSKTPXQMS-DYCDLGHISA-M Sodium hydroxide-d Chemical compound [Na+].[2H][O-] HEMHJVSKTPXQMS-DYCDLGHISA-M 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 230000021736 acetylation Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 235000003704 aspartic acid Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229940124587 cephalosporin Drugs 0.000 description 1
- 150000001780 cephalosporins Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 125000005740 oxycarbonyl group Chemical group [*:1]OC([*:2])=O 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nitrogen- Or Sulfur-Containing Heterocyclic Ring Compounds With Rings Of Six Or More Members (AREA)
Description
本発明は新規な、5−置換−1・3・4−チア
ジアゾール−2−チオール類に関するものであ
り、さらに詳しくは、下図に示す一般式()の
Rが
それぞれ1ケのアミノ基とカルボキシル基を官能
基として持つ二置換アルキル基(アミノ基は保護
されていてもよい)で表わされる、5−置換−
1・3・4−チアジアゾール−2−チオール類に
関するものである。これらの化合物は、医薬品の
中間体、たとえばセフアロスポリン系抗生物質の
3位又は7位置換系の中間体として有用な化合物
である。
本発明において用いられる原料は酸性のアミノ
酸であり、このようなものとしては、たとえば、
アスパラギン酸、あるいはグルタミン酸等があげ
られる。これらの原料を用いて、目的の5−置換
−1・3・4−チアジアゾール−2−チオール類
を合成する方法は下図の反応式で示される。
(反応式)
〔式中R′は、
The present invention relates to novel 5-substituted-1,3,4-thiadiazole-2-thiols, and more specifically, R in the general formula () shown in the figure below is 5-substituted - represented by a disubstituted alkyl group each having one amino group and one carboxyl group as functional groups (the amino group may be protected)
It relates to 1,3,4-thiadiazole-2-thiols. These compounds are useful as intermediates for pharmaceuticals, for example, intermediates for 3- or 7-substituted cephalosporin antibiotics. The raw materials used in the present invention are acidic amino acids, such as:
Examples include aspartic acid and glutamic acid. A method for synthesizing the desired 5-substituted-1,3,4-thiadiazole-2-thiols using these raw materials is shown by the reaction formula shown below. (reaction formula) [In the formula, R′ is
【式】又は[Formula] or
【式】を表わし、これらのアミ
ノ基は保護されていてもよいものとする。又、
R″はメチル、エチル又はベンジル基を示す。〕
上記反応のエステル化において用いられるア
ルコールは、メチル、エチル、ベンジル等があり
通常のエステル化法、たとえば上記アルコールを
溶媒として乾燥HClガス、SOCl2、H2SO4等を脱
水剤として行なわれる。
又、のヒドラジル化は、ヒドラジンにエステ
ルを作用させることにより容易に目的を達成する
ことが出来る。この反応で用いられる溶媒は水、
アルコール又はその混合系であり、目的物は結晶
又は油状で析出し、ロ過又はデカンテーシヨンの
操作により得られる。
次にのジチオカルジバン酸化は、ヒドラジド
に二硫化炭素を塩基の存在下作用させて行なうこ
とが出来る。この反応で用いられる溶媒としては
アルコール類、たとえばメタノール、又はエタノ
ールが用いられる。又塩基としては水酸化カリウ
ム、水酸化ナトリウム等が用いられる。
最後にの環化は、ジチオカルバジン酸の塩に
縮合剤を作用させて行なう。この反応の溶媒は縮
合剤そのものを用い、このような目的で使われる
縮合剤としては、強酸たとえば硫酸、またはリン
酸などがあげられる。
この反応において、アミノ基の保護基として用
いられるものは、反応の途中で脱離されないもの
で、反応に特に悪い影響を及ぼさないものならな
んでも良いが、このようなものとしては、アセチ
ル基、ベンジルオキシカルボニル基があげられ
る。
本発明の方法により得られる目的化合物の具体
例を以下に示す。
()[Formula] is represented, and these amino groups may be protected. or,
R'' represents a methyl, ethyl, or benzyl group.] The alcohol used in the esterification in the above reaction includes methyl, ethyl, benzyl, etc., and the usual esterification method is used, for example, dry HCl gas, SOCl 2 using the above alcohol as a solvent. , H 2 SO 4 etc. is used as a dehydrating agent. Also, the hydrazylation of can be easily achieved by reacting ester with hydrazine. The solvents used in this reaction are water,
It is an alcohol or a mixture thereof, and the target product is precipitated in the form of crystals or oil, and is obtained by filtration or decantation. The subsequent oxidation of dithiocardiban can be carried out by treating the hydrazide with carbon disulfide in the presence of a base. The solvent used in this reaction is alcohol, such as methanol or ethanol. Further, as the base, potassium hydroxide, sodium hydroxide, etc. are used. The final cyclization is carried out by allowing a condensing agent to act on the salt of dithiocarbazic acid. The condensing agent itself is used as the solvent for this reaction, and examples of the condensing agent used for this purpose include strong acids such as sulfuric acid and phosphoric acid. In this reaction, any protecting group for the amino group may be used as long as it is not eliminated during the reaction and does not have a particularly negative effect on the reaction. Examples of such groups include acetyl, benzyl, etc. An example is an oxycarbonyl group. Specific examples of target compounds obtained by the method of the present invention are shown below. ()
【式】
5−(1−アミノ−3−カルボキシ)プロピ
ル−1・3・4−チアジアゾール−2−チオー
ル。
()[Formula] 5-(1-amino-3-carboxy)propyl-1,3,4-thiadiazole-2-thiol. ()
【式】
5−(1−アミノ−2−カルボキシ)エチル
−1・3・4−チアジアゾール−2−チオー
ル。
()[Formula] 5-(1-amino-2-carboxy)ethyl-1,3,4-thiadiazole-2-thiol. ()
【式】
5−(3−アミノ−3−カルボキシプロピ
ル)−1・3・4−チアジアゾール−2−チオ
ール。
()[Formula] 5-(3-amino-3-carboxypropyl)-1,3,4-thiadiazole-2-thiol. ()
【式】
5−(2−アミノ−2−カルボキシエチル)−
1・3・4−チアジアゾール−2−チオール。
次に本発明の化合物の製法を実施例により説明
する。
実施例 1
5−(2−アミノ−2−カルボキシエチル〕−
1・3・4−チアジアゾール−2−チオール
(1) アセチル化
アスパラギン酸−β−ベンジルエステル22.3
g(0.1モル)を50%アセトニトリル100mlに溶
解し、無水酢酸30mlを滴下しながらアセチル化
反応を行なつた。この反応の間5%NaHCO3溶
液を同時に滴下しPHを7−9に調整した。反応
後、溶媒の半量を減圧で除き、その後PHを2〜
3に合せ、酢酸エチル200mlで抽出した後、有
機層を芒硝で乾燥し、濃縮乾固して油状の残渣
を得た。このオイルをヘキサンで洗浄した後、
一夜冷却放置してN−アセチルアヌパラギン酸
−β−ベンジルエステル22gを得た。
収率83%
IR 1734cm-1、1651cm-1
(2) ヒドラジドの合成
上記N−アセチルアスパラギン酸−β−ペン
ジルエステル22g(0.083モル)をエタノール
100mlに溶解し、ヒドラジン・2水和物7.88g
(0.15モル)を加え室温で2日間撹拌すると油
状の析出物が得られた。上澄をデカンテーシヨ
ンで除きエタノールで数回洗浄し、N−アセチ
ルアスパラギン酸−β−ヒドラジド11.5gを得
た。
収率72.16%
IR 1648cm-1、1552cm-1
(3) ジチオカルバジン酸の合成
上記N−アセチルアスパラギン酸−β−ヒド
ラジド11.52g(0.06モル)を、水酸化カリウ
ム6.72gをエタノール70mlに溶解した溶液に氷
冷下加え、溶解した。この後二硫化炭素6.84g
(0.04モル)を加え室温で1晩撹拌すると油状
の析出物が得られる。上澄をデカンテーシヨン
で除き、エタノールで数回洗浄した後乾燥し
て、3−(3−アセトアミド−3−カルボキシ
プロピオニル)−ジチオカルバジン酸カリウム
塩12.8gを得た。
収率69.7%
IR 1680cm-1、1642cm-1(KBr)
(4) 環化反応
上記3−(3−アセトアミド−3−カルボキ
シプロピオニル)−ジチオカルバジン酸カリウ
ム塩9.18g(0.03モル)を氷冷した濃硫酸30ml
に30分かけて少しつつ加えた。これをさらに2
時間撹拌した後反応液を粉砕した氷600ml中に
撹拌しながら投入した。析出した結晶をロ取し
て、5−(2−アセトアミド−2−カルボキシ
エチル)−1・3・4−チアジアゾール−2−
チオール5.4gを得た。収率72.0%
IR 3349cm-1 1629cm-1(KBr)
NMR(ppm) 2.0(S)CH3
3.5〜3.9(m)[Formula] 5-(2-amino-2-carboxyethyl)-
1,3,4-thiadiazole-2-thiol. Next, the method for producing the compound of the present invention will be explained with reference to Examples. Example 1 5-(2-amino-2-carboxyethyl)-
1,3,4-Thiadiazole-2-thiol (1) Acetylation Aspartic acid-β-benzyl ester 22.3
g (0.1 mol) was dissolved in 100 ml of 50% acetonitrile, and an acetylation reaction was carried out while adding 30 ml of acetic anhydride dropwise. During this reaction, 5% NaHCO 3 solution was simultaneously added dropwise to adjust the pH to 7-9. After the reaction, remove half of the solvent under reduced pressure, then reduce the pH to 2-
After extracting with 200 ml of ethyl acetate, the organic layer was dried with Glauber's salt and concentrated to dryness to obtain an oily residue. After cleaning this oil with hexane,
The mixture was left to cool overnight to obtain 22 g of N-acetyl anuparagic acid β-benzyl ester. Yield 83% IR 1734cm -1 , 1651cm -1 (2) Synthesis of hydrazide 22g (0.083 mol) of the above N-acetylaspartic acid β-pendyl ester was added to ethanol.
7.88g of hydrazine dihydrate dissolved in 100ml
(0.15 mol) was added and stirred at room temperature for 2 days to obtain an oily precipitate. The supernatant was removed by decantation and washed several times with ethanol to obtain 11.5 g of N-acetylaspartic acid-β-hydrazide. Yield 72.16% IR 1648 cm -1 , 1552 cm -1 (3) Synthesis of dithiocarbazic acid 11.52 g (0.06 mol) of the above N-acetylaspartic acid-β-hydrazide and 6.72 g of potassium hydroxide were dissolved in 70 ml of ethanol. It was added to the solution under ice cooling and dissolved. After this, 6.84g of carbon disulfide
(0.04 mol) and stirred at room temperature overnight to obtain an oily precipitate. The supernatant was removed by decantation, washed several times with ethanol, and then dried to obtain 12.8 g of 3-(3-acetamido-3-carboxypropionyl)-dithiocarbazate potassium salt. Yield 69.7% IR 1680 cm -1 , 1642 cm -1 (KBr) (4) Cyclization reaction 9.18 g (0.03 mol) of the above 3-(3-acetamido-3-carboxypropionyl)-dithiocarbazate potassium salt was cooled on ice. 30ml of concentrated sulfuric acid
I added it a little over 30 minutes. Add this 2 more times
After stirring for an hour, the reaction solution was poured into 600 ml of crushed ice with stirring. The precipitated crystals were collected by filtration and 5-(2-acetamido-2-carboxyethyl)-1,3,4-thiadiazole-2-
5.4 g of thiol was obtained. Yield 72.0% IR 3349cm -1 1629cm -1 (KBr) NMR (ppm) 2.0 (S) CH 3 3.5-3.9 (m)
【式】
(〓〓〓) 3.8〜4.3(m)CH−N
(5) 脱保護反応
上記5−(2−アセトアミド−2−カルボキ
シエチル)−1・3・4−チアジアゾール−2
−チオール5.0g(0.02モル)を6N−塩酸30ml
に溶解し、3時間加熱還流した。この溶液を減
圧で濃縮乾固し、残渣をエタノールで洗浄して
目的の5−(2−アミノ−2−カルボキシエチ
ル)−1・3・4−チアジアゾール−2−チオ
ール塩酸塩3.2gを得た。収率58.3%
IR 3125 (KBr)
NMR(ppm) 3.4〜3.8(m)[Formula] (〓〓〓) 3.8-4.3(m)CH-N (5) Deprotection reaction Above 5-(2-acetamido-2-carboxyethyl)-1,3,4-thiadiazole-2
- 5.0g (0.02mol) of thiol in 30ml of 6N hydrochloric acid
and heated under reflux for 3 hours. This solution was concentrated to dryness under reduced pressure, and the residue was washed with ethanol to obtain 3.2 g of the desired 5-(2-amino-2-carboxyethyl)-1,3,4-thiadiazole-2-thiol hydrochloride. . Yield 58.3% IR 3125 (KBr) NMR (ppm) 3.4-3.8 (m)
【式】
(〓〓〓) 3.7〜4.1(m)OH−N
実施例 2
5−(3−アミノ−3−カルボキシプロピル)−
1・3・4−チアジアゾール−2−チオール
(1) ジチオカルバジン酸の合成
グルタミン酸−γ−ベンジルエステル23.7g
(0.1モル)を用い、実施例3の(1)、(2)、(3)と同
様の操作により、3−(4−アセトアミド−4
−カルボキシブチロイル)−ジチオカルバジン
酸カリウム塩12.6gを得た。収率39.4%
IR 1682cm-1、1638cm-1
(2) 環化反応
上記3−(4−アセトアミド−4−カルボキ
シブチロイル)−ジチオカルバジン酸カリウム
塩11.16g(0.035モル)を用い、実施例3の(4)
と同様の操作により、5−(3−アセトアミド
−3−カルボキシプロピル)−1・3・4−チ
アジアゾール−2−チオール5.9gを得た。収
率63.8%
IR 3353cm-1、1630cm-1(KBr)
NMR(ppm) 2.0(S)CH3
1.7〜2.2(m)CH2
(〓〓〓) 3.8〜4.2(m)CH−N
3.0〜3.4(m)[Formula] (〓〓〓) 3.7-4.1(m)OH-N Example 2 5-(3-amino-3-carboxypropyl)-
Synthesis of 1,3,4-thiadiazole-2-thiol (1) dithiocarbazic acid Glutamic acid-γ-benzyl ester 23.7g
Using (0.1 mol), 3-(4-acetamide-4
12.6 g of potassium salt of -carboxybutyroyl)-dithiocarbazate was obtained. Yield 39.4% IR 1682 cm -1 , 1638 cm -1 (2) Cyclization reaction Using 11.16 g (0.035 mol) of the above 3-(4-acetamido-4-carboxybutyroyl)-dithiocarbazate potassium salt, Example 3 (4)
By the same operation as above, 5.9 g of 5-(3-acetamido-3-carboxypropyl)-1,3,4-thiadiazole-2-thiol was obtained. Yield 63.8% IR 3353cm -1 , 1630cm -1 (KBr) NMR (ppm) 2.0 (S) CH 3 1.7 - 2.2 (m) CH 2 (〓〓〓) 3.8 - 4.2 (m) CH-N 3.0 - 3.4 (m)
【式】
(3) 脱保護反応
上記5−(3−アセトアミド−3−カルボキ
シプロピル)−1・3・4−チアジアゾール−
2−チオール5.24g(0.02モル)を用い実施例
3の(5)と同様な操作により、目的の5−(3−
アミノ−3−カルボキシプロピル)−1・3・
4−チアジアゾール−2−チオール塩酸塩3.7
gを得た。
収率64.8%
IR 3130cm-1 (KBr)
NMR(ppm) 1.7〜2.2(m)CH2
(〓〓〓) 3.6〜4.1(m)CH−N
3.0〜3.4(m)[Formula] (3) Deprotection reaction 5-(3-acetamido-3-carboxypropyl)-1,3,4-thiadiazole-
The desired 5-(3-
Amino-3-carboxypropyl)-1・3・
4-thiadiazole-2-thiol hydrochloride 3.7
I got g. Yield 64.8% IR 3130cm -1 (KBr) NMR (ppm) 1.7-2.2 (m) CH 2 (〓〓〓) 3.6-4.1 (m) CH-N 3.0-3.4 (m)
【式】
実施例 3
5−(1−アミノ−2−カルボキシエチル)−
1・3・4−チアジアゾール−2−チオール
(1) アセチル化
L−アスパラギン酸−α−ベンジルエステル
22.3g(0.1モル)を50%アセトニトリル100ml
に溶解し、無水酢酸30mlを5%NaHCO3でPH8
〜9に調整しながら滴下した。反応後減圧下に
溶媒を濃縮し40mlとした。その後PHを2〜3に
合せ、酢酸エチル200mlで抽出した後、有機層
を芒硝で乾燥し、濃縮乾固して油状の残渣を得
た。このオイルをヘキサンで数回洗浄して、N
−アセチルアスパラギン酸−α−ベンジルエス
テル21.6gを得た。収率81.5%
IR 1733cm-1、1652cm-1(KBr)
(2) ヒデラジド化
上記N−アセチルアスパラギン酸−α−ペン
ジルエステル19.5g(0.0736モル)をエタノー
ル150mlに溶解し、ヒドラジン・2水和物7.35
(0.14モル)を加え室温で2日間撹拌すると油
状の析出物が得られた。上澄をデカンテーシヨ
ンで除きエタノールで数回洗浄した後減圧で乾
燥して、N−アセチルアスパラギン酸−α−ヒ
ドラジド10.7gを得た。収率75.7%
IR 1652cm-1、1557cm-1(KBr)
(3) ジチオカルバジン酸化
上記N−アセチルアスパラギン酸−α−ヒド
ラジド10.37g(0.054モル)を、水酸化カリウ
ム56gをエタノール75mlに溶解した溶液に氷冷
下加え溶解した。この後二硫化水素5.7g
(0.075モル)を加え室温で1晩撹拌すると油状
の析出物が得られた。上澄をデカンテーシヨン
で除き、エタノールで数回洗浄した後乾燥し
て、3−(2−アセトアミド−3−カルボキシ
プロピオニル)−ジチオカルバジン酸カリウム
塩11.9gを得た。
収率72.0%
IR 1679cm-1、1641cm-1(KBr)
(4) 環化反応
上記3−(2−アセトアミド−3−カルボキ
シプロピオニル)−ジチオカルバジン酸カリウ
ム塩9.18g(0.03モル)を冷却した濃硫酸25ml
に30分かけて少しづつ加えた。これをさらに3
時間撹拌した後、反応液を粉砕した氷600ml中
に撹拌しながら投入した。析出した結晶をロ取
して、5−(1−アセトアミド−2−カルボキ
シエチル)−1・3・4−チアジアゾール−2
−チオール5.6gを得た。収率74.7%
IR 3351cm-1、1635cm-1(KBr)
NMR(ppm) 2.0(S)OH3
(〓〓〓) 2.4〜2.9(m)CH−C=O
4.2〜4.7(m)OH−N
(5) 脱保護反応
上記5−(1−アセトアミド−2−カルボキ
シエチル)−1・3・4−チアジアゾール−2
−チオール5.0g(0.02モル)を6N−塩酸30ml
に溶解し、5時間加熱還流した。この溶液を減
圧で濃縮乾固し、残渣をエーテルで洗浄して、
日的の5−(1−アミノ−2−カルボキシエチ
ル)−1・3・4−チアジアゾール−2−チオ
ール塩酸塩3.8gを得た。収率69.2%
IR 3128cm-1(KBr)
NMR(ppm) 2.2〜2.6(m)CH2−C=O
(D2・O、NaOD) 4.1〜4.5(m)CH−N
実施例 4
5−(1−アミノ−3−カルボキシプロピル)−
1・3・4−チアジアゾール−2−チオール
(1) ジチオカルバジン酸の合成
L−グルタルミン酸−α−ベンジルエステル
23.7g(0.1モル)を用い、実施例5の(1)、
(2)、(3)と同様の操作で3−(2−アセトアミド
−4−カルボキシブチロイル)−ジチオカルバ
ジン酸−カリウム塩12.85gを得た。収率40.16
%
IR 1683cm-1、1640cm-1(KBr)
(2) 環化反応
上記3−(2−アセトアミド−4−カルボキ
シブチロイル)−ジチオカルバジン酸カリウム
塩12.8g(0.04モル)を用い、実施例5の(4)と
同様の操作で5−(1−アセトアミド−3−カ
ルボキシプロピル)−1・3・4−チアジアゾ
ール−2−チオール6.3gを得た。収率59.7%
IR 3347cm-1、1634cm-1(KBr)
NMR(ppm) 2.0(S)CH3、1.9〜2.3
(m)CH2
(〓〓〓) 2.1〜2.4(m)CH2−C=O
3.8〜4.2(m)CH−N
(3) 脱保護反応
上記5−(1−アセトアミド−3−カルボキ
シプロピル)−1・3・4−チアジアゾール−
2−チオール6.6g(0.025モル)を用い実施例
5の(5)と同様の操作で5−(1−アミノ−3−
カルボキシプロピル)−1・3・4−チアジア
ゾール−2−チオール3.98gを得た。収率
55.76%
IR 3126cm-1(KBr)
NMR(ppm) 1.8〜2.3(m)CH2
(〓〓〓) 2.1〜2.4(m)CH2−C=O
4.0〜4.4(m)CH−N[Formula] Example 3 5-(1-amino-2-carboxyethyl)-
1,3,4-thiadiazole-2-thiol (1) Acetylated L-aspartic acid-α-benzyl ester
22.3g (0.1mol) in 100ml of 50% acetonitrile
Dissolve 30 ml of acetic anhydride in 5% NaHCO3 to pH 8 .
It was added dropwise while adjusting the temperature to 9. After the reaction, the solvent was concentrated under reduced pressure to 40 ml. Thereafter, the pH was adjusted to 2 to 3, and the mixture was extracted with 200 ml of ethyl acetate. The organic layer was dried with sodium sulfate and concentrated to dryness to obtain an oily residue. Wash this oil several times with hexane and
21.6 g of -acetylaspartic acid-α-benzyl ester was obtained. Yield 81.5% IR 1733 cm -1 , 1652 cm -1 (KBr) (2) Hyderazidation 19.5 g (0.0736 mol) of the above N-acetylaspartic acid α-pendyl ester was dissolved in 150 ml of ethanol, and hydrazine dihydrate thing 7.35
(0.14 mol) was added and stirred at room temperature for 2 days to obtain an oily precipitate. The supernatant was removed by decantation, washed several times with ethanol, and then dried under reduced pressure to obtain 10.7 g of N-acetylaspartic acid-α-hydrazide. Yield 75.7% IR 1652 cm -1 , 1557 cm -1 (KBr) (3) Dithiocarbazine oxidation 10.37 g (0.054 mol) of the above N-acetylaspartic acid-α-hydrazide and 56 g of potassium hydroxide were dissolved in 75 ml of ethanol. It was added to the solution under ice cooling and dissolved. After this, 5.7g of hydrogen disulfide
(0.075 mol) was added and stirred at room temperature overnight to obtain an oily precipitate. The supernatant was removed by decantation, washed several times with ethanol, and then dried to obtain 11.9 g of 3-(2-acetamido-3-carboxypropionyl)-dithiocarbazate potassium salt. Yield 72.0% IR 1679 cm -1 , 1641 cm -1 (KBr) (4) Cyclization reaction 9.18 g (0.03 mol) of the above 3-(2-acetamido-3-carboxypropionyl)-dithiocarbazate potassium salt was cooled. 25ml concentrated sulfuric acid
was added little by little over 30 minutes. Add this to 3 more
After stirring for an hour, the reaction solution was poured into 600 ml of crushed ice with stirring. The precipitated crystals were collected by filtration to give 5-(1-acetamido-2-carboxyethyl)-1,3,4-thiadiazole-2.
- 5.6 g of thiol were obtained. Yield 74.7% IR 3351 cm -1 , 1635 cm -1 (KBr) NMR (ppm) 2.0 (S) OH 3 (〓〓〓) 2.4-2.9 (m) CH-C=O 4.2-4.7 (m) OH-N (5) Deprotection reaction 5-(1-acetamido-2-carboxyethyl)-1,3,4-thiadiazole-2
- 5.0g (0.02mol) of thiol in 30ml of 6N hydrochloric acid
and heated under reflux for 5 hours. The solution was concentrated to dryness under reduced pressure, and the residue was washed with ether.
3.8 g of 5-(1-amino-2-carboxyethyl)-1,3,4-thiadiazole-2-thiol hydrochloride was obtained. Yield 69.2% IR 3128cm -1 (KBr) NMR (ppm) 2.2-2.6 (m) CH 2 -C=O (D 2 O, NaOD) 4.1-4.5 (m) CH-N Example 4 5-( 1-amino-3-carboxypropyl)-
1,3,4-thiadiazole-2-thiol (1) Synthesis of dithiocarbazic acid L-glutaric acid-α-benzyl ester
Using 23.7g (0.1 mol), (1) of Example 5,
In the same manner as (2) and (3), 12.85 g of 3-(2-acetamido-4-carboxybutyroyl)-dithiocarbazic acid potassium salt was obtained. Yield 40.16
% IR 1683 cm -1 , 1640 cm -1 (KBr) (2) Cyclization reaction Example using 12.8 g (0.04 mol) of the above 3-(2-acetamido-4-carboxybutyroyl)-dithiocarbazate potassium salt 6.3 g of 5-(1-acetamido-3-carboxypropyl)-1,3,4-thiadiazole-2-thiol was obtained by the same operation as in 5-(4). Yield 59.7% IR 3347cm -1 , 1634cm -1 (KBr) NMR (ppm) 2.0 (S)CH 3 , 1.9-2.3
(m) CH 2 (〓〓〓) 2.1-2.4 (m) CH 2 -C=O 3.8-4.2 (m) CH-N (3) Deprotection reaction 5-(1-acetamido-3-carboxypropyl) -1,3,4-thiadiazole-
5-(1-amino-3-
3.98 g of (carboxypropyl)-1,3,4-thiadiazole-2-thiol was obtained. yield
55.76% IR 3126cm -1 (KBr) NMR (ppm) 1.8-2.3 (m) CH 2 (〓〓〓) 2.1-2.4 (m) CH 2 -C=O 4.0-4.4 (m) CH-N
Claims (1)
キシル基で置換された、2置換アルキル基(アミ
ノ基は保護されていてもよい)で表わされる、5
−置換アルキル−1・3・4−チアジアゾール−
2−チオール類。[Claims] 1. General formula (wherein R is a 2-substituted alkyl group (the amino group may be protected), each substituted with one amino group and an alkyl group, 5
-Substituted alkyl-1,3,4-thiadiazole-
2-thiols.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56125880A JPS5829780A (en) | 1981-08-13 | 1981-08-13 | 5-substituted alkyl-1,3,4-thiadiazole-thiol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56125880A JPS5829780A (en) | 1981-08-13 | 1981-08-13 | 5-substituted alkyl-1,3,4-thiadiazole-thiol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5829780A JPS5829780A (en) | 1983-02-22 |
| JPS6153349B2 true JPS6153349B2 (en) | 1986-11-17 |
Family
ID=14921203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56125880A Granted JPS5829780A (en) | 1981-08-13 | 1981-08-13 | 5-substituted alkyl-1,3,4-thiadiazole-thiol |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5829780A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0522130D0 (en) | 2005-10-31 | 2005-12-07 | Angeletti P Ist Richerche Bio | Therapeutic compounds |
-
1981
- 1981-08-13 JP JP56125880A patent/JPS5829780A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5829780A (en) | 1983-02-22 |
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