2-amino-5-ethylthiophene-3-carboxylic acid | 55502-94-8

• 物质功能分类: 有机原料 - 羧酸类化合物及衍生物
• 分子结构分类: 有机化合物 - 有机杂环化合物 - 噻吩类
• 英文名称: 2-amino-5-ethylthiophene-3-carboxylic acid
• 英文别名: 2-amino-5-ethyl-thiophene-3-carboxylic acid；2-amino-5-ethylthiophene-3-carboxylate
• CAS: 55502-94-8
• 化学式: C₇H₉NO₂S
• mdl: MFCD08700490
• 分子量: 171.22
• InChiKey: KUYZGOKRHKYYNL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.285
• 拓扑面积：
  91.6
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-amino-5-ethylthiophene-3-carboxylic acid 在 吡啶 、 ammonium acetate 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 反应 1.0h， 生成 ethyl 3,4-dihydro-6-ethyl-5-iodo-4-oxothieno[2,3-d]pyrimidine-2-carboxylate
  参考文献：
  名称：

  3,4-二氢-4-氧杂噻吩并[2,3-d]嘧啶-2-羧酸酯的合成，这是一系列口服活性抗过敏药。

  摘要：

  已经制备了一系列新颖的3，4-二氢-4-氧杂噻吩并[2，3-d]嘧啶-2-羧酸衍生物，并测试了其抗过敏活性。已发现该系列的成员，包括羧酸盐和酯，在大鼠被动性皮肤过敏反应（PCA）测试中表现出口服活性。通过在5位取代H或CH3，在6位取代低级烷基，可以优化活性。乙基6-乙基-3,4-二氢-4-氧杂噻吩并[[2,3-d]嘧啶-2-羧酸酯和3,4-二氢-5-甲基-6-（2-甲基丙基）-4-氧噻吩并[ 2,3-d]嘧啶-2-羧酸二钾盐分别是最有效的酯和盐。

  DOI：

  10.1021/jm00191a009
• 作为产物：
  描述：

  净司他丁 在 sodium hydroxide 作用下， 以 甲醇 、 水 为溶剂， 反应 4.0h， 以74%的产率得到2-amino-5-ethylthiophene-3-carboxylic acid
  参考文献：
  名称：

  A Class of 5-Nitro-2-furancarboxylamides with Potent Trypanocidal Activity against Trypanosoma brucei in Vitro

  摘要：

  Recently, the World Health Organization approved the nifurtimox-eflornithine combination therapy for the treatment of human African trypanosomiasis, renewing interest in nitroheterocycle therapies for this and associated diseases. In this study, we have synthesized a series of novel 5-nitro-2-furancarboxylamides that show potent trypanocidal activity, similar to 1000-fold more potent than nifurtimox against in vitro Trypanosoma brucei with very low cytotoxicity against human He La cells. More importantly, the most potent analogue showed very limited cross-resistance to nifurtimox-resistant cells and vice versa. This implies that our novel, relatively easy to synthesize and therefore cheap, 5-nitro-2-furancarboxylamides are targeting a different, but still essential, biochemical process to those targeted by nifurtimox or its metabolites in the parasites. The significant increase in potency (smaller dose probably required) has the potential for greatly reducing unwanted side effects and also reducing the likelihood of drug resistance. Collectively, these findings have important implications for the future therapeutic treatment of African sleeping sickness.

  DOI：

  10.1021/jm301215e

文献信息

• Piperazine and homopiperazine compounds
  申请人：Millennium Pharmaceuticals, Inc.

  公开号：US20030153556A1

  公开（公告）日：2003-08-14

  Compounds are provided having a piperazine or homopiperazine ring which are useful in the treatment of thrombosis.

  提供了具有哌嗪或同源哌嗪环的化合物，这些化合物在治疗血栓症方面很有用。
• [EN] SUBSTITUTED PIPERAZINES OF AZEPINES, OXAZEPINES, AND THIAZEPINES<br/>[FR] PIPERAZINES SUBSTITUTEES D'AZEPINES, D'OXAZEPINES, ET DE THIAZEPINES
  申请人：LILLY CO ELI

  公开号：WO2005026177A1

  公开（公告）日：2005-03-24

  Described herein are antipyschotic compounds of formula (I) wherein: is an optionally benzo-fused five or six member aromatic ring having zero to three hetero atoms independently selected from N, O, and S; R1 is hydrogen, (C1-6) fluoroalkyl, (C3-6) cycloalkyl, or (C1-4) alkyl, wherein the (C1-4) alkyl is unsubstituted or substituted with hydroxy, methoxy, ethoxy, OCH2CH2OH, -CN, imidazolidin-2-one, phenyl, or tetrazole wherein tetrazole is unsubstituted or substituted with (C1-4) alkyl; R2 is H, halogen, (C1-6) fluoroalkyl, (C3-6) cycloalkyl, OR6, SR6, NO2, CN, COR6, C(O)OR6, C(OH)R6, CONR7R8, phenyl or (C1-6) alkyl, wherein the (C1-6) alkyl is unsubstituted or substituted with a hydroxy; R3 is hydrogen, (C 1-6)fluoroalkyl , (C3-6) cycloalkyl, (C 2-6) alkenyl, phenyl, monocyclic heteroaromatic, bicyclic heteroaromatic, or (C1-4)alkyl wherein (C1-4) alkyl is unsubstituted or substituted with a phenyl; R4 and R5 are independently selected from hydrogen, halogen, (C1-6) alkyl, (C1-6) fluoroalkyl, OR9, SR9, NO2, CN, or COR9; R6 is hydrogen, (C1-6) fluoroalkyl, or (C1-6) alkyl; R7 and R8 are independently hydrogen, or (C1-6) alkyl; R9 is hydrogen, (C1-6) fluoroalkyl, (C1-6) alkyl; Alk is (C1-4) alkylene unsubstituted or substituted with a hydroxy; Y is oxygen, sulfur, SO2, or a bond; X is CH2, C=O, S, O, or SO2; Z is hydrogen, halogen, (C1-6) alkyl, (C1-6)fluoroalkyl, -OH, (C1-6) alkoxy, (C1-6) fluoroalkoxy, (C1-6) alkylthio, (C1-6) acyl, (C1-4)alkylsulfonyl, -OCF3, -NO2, - CN, carboxamido which may be substituted on the nitrogen by one or two (C1-4) alkyl groups, and -NH2 in which one of the hydrogens may be replaced by a (C1-4) alkyl group and the other hydrogen may be replaced by either a (C1-4) alkyl group, a (C1-6) acyl group, or a (C1-4) alkylsulfonyl group; the phenyl of R1, R2 or R3 is independently unsubstituted or substituted with one to three substituents independently selected from Z; the monocyclic heteroaromatic of R3 is unsubstituted or substituted with one to three substituents independently selected from Z; the bicyclic heteroaromatic of R3 is unsubstituted or substituted with one to three substituents independently selected from Z; and salts, solvates, and crystal forms thereof. Also described are the use of the compounds of formula (I) as antagonists of the dopamine D2 receptor and as agents for the treatment of psychosis and bipolar disorders, and pharmaceutical formulations of the compounds of formula (I).

  本文描述了式(I)的抗精神病化合物，其中：是一个可选的苯并五元或六元芳香环，其中含有零至三个异原子，独立选择自N、O和S；R1是氢，(C1-6)氟烷基，(C3-6)环烷基，或(C1-4)烷基，其中(C1-4)烷基未取代或取代为羟基、甲氧基、乙氧基、OCH2CH2OH、-CN、咪唑烷-2-酮、苯基或四氮唑，其中四氮唑未取代或取代为(C1-4)烷基；R2是H、卤素、(C1-6)氟烷基、(C3-6)环烷基、OR6、SR6、NO2、CN、COR6、C(O)OR6、C(OH)R6、CONR7R8、苯基或(C1-6)烷基，其中(C1-6)烷基未取代或取代为羟基；R3是氢，(C1-6)氟烷基，(C3-6)环烷基，(C2-6)烯基，苯基，单环杂芳基，双环杂芳基，或(C1-4)烷基，其中(C1-4)烷基未取代或取代为苯基；R4和R5独立选择自氢、卤素、(C1-6)烷基、(C1-6)氟烷基、OR9、SR9、NO2、CN或COR9；R6是氢、(C1-6)氟烷基或(C1-6)烷基；R7和R8独立选择自氢或(C1-6)烷基；R9是氢、(C1-6)氟烷基或(C1-6)烷基；Alk是未取代或取代为羟基的(C1-4)烷基；Y是氧、硫、SO2或键；X是CH2、C=O、S、O或SO2；Z是氢、卤素、(C1-6)烷基、(C1-6)氟烷基、-OH、(C1-6)烷氧基、(C1-6)氟烷氧基、(C1-6)烷硫基、(C1-6)酰基、(C1-4)烷基磺酰基、-OCF3、-NO2、-CN、羧酰胺基，该羧酰胺基可在氮上被一个或两个(C1-4)烷基取代，以及-NH2，其中一个氢原子可被(C1-4)烷基取代，另一个氢原子可被(C1-4)烷基、(C1-6)酰基或(C1-4)烷基磺酰基取代；R1、R2或R3的苯基独立地未取代或取代为从Z中独立选择的一个至三个取代基；R3的单环杂芳基未取代或取代为从Z中独立选择的一个至三个取代基；R3的双环杂芳基未取代或取代为从Z中独立选择的一个至三个取代基；以及其盐、溶剂化合物和晶型形式。还描述了将式(I)的化合物用作多巴胺D2受体拮抗剂和治疗精神病和双相情感障碍的药物，以及式(I)的药物配方。
• Substituted 5-amino-1,2,4-thiadiazoles with pharmaceutical activity
  申请人：LILLY INDUSTRIES LIMITED

  公开号：EP0455356A1

  公开（公告）日：1991-11-06

  Pharmaceutical compounds of the following formula are described: in which R¹ is hydrogen, C₁₋₄ alkyl, C₁₋₄ alkoxy-C₁₋₄ alkyl, hydroxy-C₁₋₄ alkyl, optionally substituted phenyl, optionally substituted phenyl-C₁₋₄ alkyl or a heterocycle selected from: where R³ is hydrogen, C₁₋₄ alkyl, C₁₋₄ alkoxy, nitro, halo, cyano, trifluoromethyl, carboxyl or -CONH₂, and R⁴ is C₁₋₄ alkyl; and R² is hydrogen, C₁₋₄ alkyl, phenyl or thienyl substituted with a carboxyl or C₁₋₄ alkoxy-carbonyl group, an acyl group of the formula R⁵CO- where R⁵ is hydrogen, C₁₋₄ alkyl, C₁₋₄ alkoxy-C₁₋₄ alkyl, halo C₁₋₄ alkyl, C₁₋₄ alkoxy, halo-C₁₋₄ alkoxy, phenyl, phenyl-C₁₋₄ alkyl, -NHC₁₋₄ alkyl, -NH phenyl or where R⁶ is C₁₋₄ alkyl, or a group of the formula -CH=C(COC₁₋₄ alkoxy)₂; or a salt thereof.

  以下是描述的具有以下结构的药物化合物： 其中R¹为氢、C₁₋₄烷基、C₁₋₄烷氧基-C₁₋₄烷基、羟基-C₁₋₄烷基、可选择取代的苯基、可选择取代的苯基-C₁₋₄烷基或从以下选取的杂环： 其中R³为氢、C₁₋₄烷基、C₁₋₄烷氧基、硝基、卤素、氰基、三氟甲基、羧基或-CONH₂，R⁴为C₁₋₄烷基；而R²为氢、C₁₋₄烷基、苯基或经羧基或C₁₋₄烷氧基羰基取代的噻吩基，具有R⁵CO-式的酰基，其中R⁵为氢、C₁₋₄烷基、C₁₋₄烷氧基-C₁₋₄烷基、卤素C₁₋₄烷基、C₁₋₄烷氧基、卤素-C₁₋₄烷氧基、苯基、苯基-C₁₋₄烷基、-NHC₁₋₄烷基、-NH苯基或 其中R⁶为C₁₋₄烷基，或具有-CH=C(COC₁₋₄烷氧基)₂式的基团；或其盐。
• Thienopyridine-carboxylic acid derivatives
  申请人：Takeda Chemical Industries, Ltd.

  公开号：US03951989A1

  公开（公告）日：1976-04-20

  Novel thienopyridine-carboxylic acid derivatives, which are shown by the general formula ##SPC1## Wherein R.sup.1 represents hydrogen or a lower alkyl; R.sup.2 represents hydrogen, a lower alkyl or a halogen; or R.sup.1 and R.sup.2, taken together, may represent an alkylene to form a 5- or 6-membered ring with or without alkyl substituents; each of R.sup.4 and R.sup.5 represents hydrogen or a lower alkyl; and their pharmaceutically acceptable salts obtainable when R.sup.4 is hydrogen, which are useful medicines such as chemotherapeutic agents of bacterial infections.

  新型噻吩吡啶羧酸衍生物，其一般式如下所示：其中R.sup.1代表氢或较低的烷基；R.sup.2代表氢、较低的烷基或卤素；或R.sup.1和R.sup.2一起，可以代表烷基，形成一个5-或6-成员环，有或没有烷基取代基；R.sup.4和R.sup.5中的每一个代表氢或较低的烷基；当R.sup.4为氢时，其药用可接受的盐，可用作细菌感染的化疗药物等有用药物。
• Substituted piperazines of azepines, oxazepines and thiazepines
  申请人：He Xiaoqiang John

  公开号：US20060270656A1

  公开（公告）日：2006-11-30

  Described herein are antipyschotic compounds of formula (I) wherein: is an optionally benzo-fused five or six member aromatic ring having zero to three hetero atoms independently selected from N, O, and S; R 1 is hydrogen, (C 1-6 ) fluoroalkyl, (C 3-6 ) cycloalkyl, or (C 1-4 ) alkyl, wherein the (C 1-4 ) alkyl is unsubstituted or substituted with hydroxy, methoxy, ethoxy, OCH 2 CH 2 OH, —CN, imidazolidin-2-one, phenyl, or tetrazole wherein tetrazole is unsubstituted or substituted with (C 1-4 ) alkyl; R 2 is H, halogen, (C 1-6 ) fluoroalkyl, (C 3-6 ) cycloalkyl, OR 6 , SR 6 , NO 2 , CN, COR 6 , C(O)OR 6 , C(OH)R 6 , CONR 7 R 8 , phenyl or (C 1-6 ) alkyl, wherein the (C 1-6 ) alkyl is unsubstituted or substituted with a hydroxy; R 3 is hydrogen, (C 1-6 )fluoroalkyl , (C 3-6 ) cycloalkyl, (C 2-6 ) alkenyl, phenyl, monocyclic heteroaromatic, bicyclic heteroaromatic, or (C 1-4 )alkyl wherein (C 1-4 ) alkyl is unsubstituted or substituted with a phenyl; R 4 and R 5 are independently selected from hydrogen, halogen, (C 1-6 ) alkyl, (C 1-6 ) fluoroalkyl, OR 9 , SR 9 , NO 2 , CN, or COR 9 ; R 6 is hydrogen, (C 1-6 ) fluoroalkyl, or (C 1-6 ) alkyl; R 7 and R 8 are independently hydrogen, or (C 1-6 ) alkyl; R 9 is hydrogen, (C 1-6 ) fluoroalkyl, (C 1-6 ) alkyl; Alk is (C 1-4 ) alkylene unsubstituted or substituted with a hydroxy; Y is oxygen, sulfur, SO 2 , or a bond; X is CH 2 , C═O, S, O, or SO 2 ; Z is hydrogen, halogen, (C 1-6 ) alkyl, (C 1-6 )fluoroalkyl, —OH, (C 1-6 ) alkoxy, (C 1-6 ) fluoroalkoxy, (C 1-6 ) alkylthio, (C 1-6 ) acyl, (C 1-4 )alkylsulfonyl, —OCF 3 , —NO 2 , —CN, carboxamido which may be substituted on the nitrogen by one or two (C 1-4 ) alkyl groups, and —NH 2 in which one of the hydrogens may be replaced by a (C 1-4 ) alkyl group and the other hydrogen may be replaced by either a (C 1-4 ) alkyl group, a (C 1-6 ) acyl group, or a (C 1-4 ) alkylsulfonyl group; the phenyl of R 1 , R 2 or R 3 is independently unsubstituted or substituted with one to three substituents independently selected from Z; the monocyclic heteroaromatic of R 3 is unsubstituted or substituted with one to three substituents independently selected from Z; the bicyclic heteroaromatic of R 3 is unsubstituted or substituted with one to three substituents independently selected from Z; and salts, solvates, and crystal forms thereof. Also described are the use of the compounds of formula (I) as antagonists of the dopamine D 2 receptor and as agents for the treatment of psychosis and bipolar disorders, and pharmaceutical formulations of the compounds of formula (I).

  本文描述了式(I)的抗精神病化合物，其中： - 是一个可选的苯并五元或六元芳香环，其具有0-3个杂原子，独立地选自N，O和S； - R1是氢，(C1-6)氟烷基，(C3-6)环烷基或(C1-4)烷基，其中(C1-4)烷基未取代或取代了羟基，甲氧基，乙氧基，OCH2CH2OH，—CN，咪唑啉-2-酮，苯基或四唑，其中四唑未取代或取代了(C1-4)烷基； - R2是H，卤素，(C1-6)氟烷基，(C3-6)环烷基，OR6，SR6，NO2，CN，COR6，C(O)OR6，C(OH)R6，CONR7R8，苯基或(C1-6)烷基，其中(C1-6)烷基未取代或取代了羟基； - R3是氢，(C1-6)氟烷基，(C3-6)环烷基，(C2-6)烯基，苯基，单环杂芳基，双环杂芳基或(C1-4)烷基，其中(C1-4)烷基未取代或取代了苯基； - R4和R5独立地选自氢，卤素，(C1-6)烷基，(C1-6)氟烷基，OR9，SR9，NO2，CN或COR9； - R6是氢，(C1-6)氟烷基或(C1-6)烷基； - R7和R8独立地是氢或(C1-6)烷基； - R9是氢，(C1-6)氟烷基或(C1-6)烷基； - Alk是(C1-4)烷基，未取代或取代了羟基； - Y是氧，硫，SO2或键； - X是CH2，C═O，S，O或SO2； - Z是氢，卤素，(C1-6)烷基，(C1-6)氟烷基，—OH，(C1-6)烷氧基，(C1-6)氟烷氧基，(C1-6)烷硫基，(C1-6)酰基，(C1-4)烷基磺酰基，—OCF3，—NO2，—CN，羧酰胺，其氮上可能通过一个或两个(C1-4)烷基取代，以及—NH2，在其中一个氢可能被(C1-4)烷基取代，另一个氢可能被(C1-4)烷基，(C1-6)酰基或(C1-4)烷基磺酰基取代； - R1，R2或R3的苯基独立地未取代或取代了1-3个Z取代基； - R3的单环杂芳基未取代或取代了1-3个Z取代基； - R3的双环杂芳基未取代或取代了1-3个Z取代基； - 还描述了该化合物的盐，溶剂化合物和晶体形式。 还描述了将式(I)化合物用作多巴胺D2受体拮抗剂和治疗精神病和双相障碍的药物，以及式(I)化合物的制剂。