7alpha-Chloro-3-methyl-3-cephem-4-carboxylic acid | 126598-04-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 7alpha-Chloro-3-methyl-3-cephem-4-carboxylic acid
• 英文别名: (6R,7S)-7-chloro-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
• CAS: 126598-04-7
• 化学式: C₈H₈ClNO₃S
• 分子量: 233.675
• InChiKey: VUOVDUOGDKCJDJ-MHTLYPKNSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.7
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  82.9
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  7alpha-Chloro-3-methyl-3-cephem-4-carboxylic acid 在 Oxone 、 草酰氯 、 N,N-二甲基甲酰胺 作用下， 以 四氢呋喃 、 甲醇 、 水 为溶剂， 反应 3.67h， 生成 7α-chloro-3-methyl-1,1-dioxoceph-3-em-4-carboxylic acid sulfone chloride
  参考文献：
  名称：

  Synthesis and evaluation of new elastase inhibitors. I. 1,1-Dioxocephem-4-thiolesters

  摘要：

  Several 7alpha-chloro and 7alpha-methoxy cephalosporin thiolester sulphones variously substituted at the C-3' position were synthesized from 7-amino-3-deacetoxycephalosporanic acid (7-ADCA). The compounds are time-dependent inhibitors of human leukocyte elastase (HLE) with effective K(i) ranging from micro- to nanomolar values, and second order rate constant reaching 10(6) M-1s-1; they also inhibit porcine pancreatic elastase with similar, though not identical efficiency. Compared to the corresponding cephem esters, the thiolesters of the 7-Cl series inhibit HLE up to 10 times as fast. Complete enzyme inactivation is achieved when a leaving group at C-3' (OAc or S-Het) is present, at the expense however of stability towards hydrolytic beta-lactam cleavage. In the 7-OMe series the thiolester compounds are far more stable and retain good efficiency for irreversible enzyme inhibition, superior to that displayed by the corresponding ester compounds. Three representative compounds (including one ester and two thiolesters) are shown to be effective inhibitors of HLE in the presence of insoluble elastin.

  DOI：

  10.1016/0223-5234(92)90019-w
• 作为产物：
  描述：

  7-氨基-3-甲基-8-氧代-5-硫杂-1-氮杂双环[4.2.0]辛-2-烯-2-甲酸 在 盐酸 、 sodium nitrite 作用下， 以 丙酮 为溶剂， 反应 1.0h， 生成 7alpha-Chloro-3-methyl-3-cephem-4-carboxylic acid
  参考文献：
  名称：

  Synthesis and evaluation of new elastase inhibitors. I. 1,1-Dioxocephem-4-thiolesters

  摘要：

  Several 7alpha-chloro and 7alpha-methoxy cephalosporin thiolester sulphones variously substituted at the C-3' position were synthesized from 7-amino-3-deacetoxycephalosporanic acid (7-ADCA). The compounds are time-dependent inhibitors of human leukocyte elastase (HLE) with effective K(i) ranging from micro- to nanomolar values, and second order rate constant reaching 10(6) M-1s-1; they also inhibit porcine pancreatic elastase with similar, though not identical efficiency. Compared to the corresponding cephem esters, the thiolesters of the 7-Cl series inhibit HLE up to 10 times as fast. Complete enzyme inactivation is achieved when a leaving group at C-3' (OAc or S-Het) is present, at the expense however of stability towards hydrolytic beta-lactam cleavage. In the 7-OMe series the thiolester compounds are far more stable and retain good efficiency for irreversible enzyme inhibition, superior to that displayed by the corresponding ester compounds. Three representative compounds (including one ester and two thiolesters) are shown to be effective inhibitors of HLE in the presence of insoluble elastin.

  DOI：

  10.1016/0223-5234(92)90019-w

文献信息

• 2-spirocyclopropyl cephalosporin sulfone derivatives
  申请人：SynPhar Laboratories, Inc.

  公开号：US05264429A1

  公开（公告）日：1993-11-23

  Derivatives of 2-spirocyclopropyl cephalosporin sulfone of the structural formula I ##STR1## are provided which are useful as potent elastase inhibitors.

  提供了2-螺环丙基头孢菌素磺酮(I结构式)的衍生物，这些衍生物是有用的强效弹性蛋白酶抑制剂。
• NOVEL 2-SPIROCYCLOPROPYL CEPHALOSPORIN SULFONE DERIVATIVES AND PROCESSES FOR THE PREPARATION THEREOF
  申请人：SYNPHAR LABORATORIES INC.

  公开号：EP0494914A1

  公开（公告）日：1992-07-22
• 2-SPIROCYCLOPROPYL CEPHALOSPORIN DERIVATIVES AND PROCESSES FOR THE PREPARATION THEREOF
  申请人：SYNPHAR LABORATORIES INC.

  公开号：EP0494914B1

  公开（公告）日：1998-12-23
• US5264430A
  申请人：——

  公开号：US5264430A

  公开（公告）日：1993-11-23
• US5264429A
  申请人：——

  公开号：US5264429A

  公开（公告）日：1993-11-23