4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano-[4,3-d][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | 623931-32-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酰胺类
• 英文名称: 4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano-[4,3-d][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate
• 英文别名: 4-nitrobenzyl(5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano[4,3-d][1,3]thiazol-2-yl)]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate
• CAS: 623931-32-8
• 化学式: C₂₄H₁₉BrN₄O₈S₂
• 分子量: 635.473
• InChiKey: QIVPOHLXZOIVAT-HWDGFJGFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.61
• 重原子数：
  39.0
• 可旋转键数：
  7.0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  142.58
• 氢给体数：
  0.0
• 氢受体数：
  12.0

反应信息

• 作为反应物：
  描述：

  4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano-[4,3-d][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate 在 锌 、 sodium hydroxide 作用下， 以 四氢呋喃 、 phosphate buffer 、 乙腈 为溶剂， 反应 2.0h， 以30%的产率得到sodium;(5R,6Z)-6-(10-oxa-7-thia-2,5-diazatricyclo[6.4.0.02,6]dodeca-1(8),3,5-trien-4-ylmethylidene)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate
  参考文献：
  名称：

  5,5,6-Fused tricycles bearing imidazole and pyrazole 6-methylidene penems as broad-spectrum inhibitors of β-lactamases

  摘要：

  beta-Lactamases are serine- and metal-dependent hydrolases, produced by the bacteria as defense against beta-lactam antibiotics. Commercially available inhibitors such as clavulanic acid, sulbactam, and tazobactam, which are currently used in the hospital settings, have reduced activity against newly emerging beta-lactamases. Bacterial production of diverse beta-lactamases including class-A, class-C, and ESBLs has motivated several research groups to search for inhibitors with a broader spectrum of activity. Previously, several novel 6-methylidene penems bearing, [5, 5] [5, 6] and [5, 5, 5] heterocycles have been synthesized in our laboratory and were shown to be potent and broad-spectrum beta-lactamase inhibitors. As a continuation of our previous work and in order to extend the structure-activity relationships, in this paper, we describe herein the synthesis and in vitro, in vivo activities of several novel 5,5,6-fused tricyclic heterocycles attached to the 6-methylidene penem core. The compounds presented in the current paper are potent and broad-spectrum inhibitors of the TEM-1 and AmpC beta-lactamases. In combination with piperacillin, their in vitro activities showed enhanced susceptibility to class A- and C-resistant strains studied in various bacteria. Some of the newly synthesized compounds such as 12a-c were shown to have in vivo activity in the acute lethal infection model against TEM-1 producing organisms. The 5,5,6-fused heterocyclic ring cores such as 21, 25, and 35 reported here are hitherto unknown in the literature. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2007.11.006
• 作为产物：
  描述：

  、 乙酸酐 以 四氢呋喃 、 乙腈 为溶剂， 反应 15.0h， 以400 mg的产率得到4-nitrobenzyl (5R)-6-[(acetyloxy)(5,8-dihydro-6H-imidazo[2,1-b][1,3]pyrano-[4,3-d][1,3]thiazol-2-yl)methyl]-6-bromo-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate
  参考文献：
  名称：

  5,5,6-Fused tricycles bearing imidazole and pyrazole 6-methylidene penems as broad-spectrum inhibitors of β-lactamases

  摘要：

  beta-Lactamases are serine- and metal-dependent hydrolases, produced by the bacteria as defense against beta-lactam antibiotics. Commercially available inhibitors such as clavulanic acid, sulbactam, and tazobactam, which are currently used in the hospital settings, have reduced activity against newly emerging beta-lactamases. Bacterial production of diverse beta-lactamases including class-A, class-C, and ESBLs has motivated several research groups to search for inhibitors with a broader spectrum of activity. Previously, several novel 6-methylidene penems bearing, [5, 5] [5, 6] and [5, 5, 5] heterocycles have been synthesized in our laboratory and were shown to be potent and broad-spectrum beta-lactamase inhibitors. As a continuation of our previous work and in order to extend the structure-activity relationships, in this paper, we describe herein the synthesis and in vitro, in vivo activities of several novel 5,5,6-fused tricyclic heterocycles attached to the 6-methylidene penem core. The compounds presented in the current paper are potent and broad-spectrum inhibitors of the TEM-1 and AmpC beta-lactamases. In combination with piperacillin, their in vitro activities showed enhanced susceptibility to class A- and C-resistant strains studied in various bacteria. Some of the newly synthesized compounds such as 12a-c were shown to have in vivo activity in the acute lethal infection model against TEM-1 producing organisms. The 5,5,6-fused heterocyclic ring cores such as 21, 25, and 35 reported here are hitherto unknown in the literature. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2007.11.006

文献信息

• Tricyclic 6-alkylidene-penems as class-D beta-lactamases inhibitors
  申请人：Mansour Suhayl Tarek

  公开号：US20060276446A1

  公开（公告）日：2006-12-07

  This invention relates to certain tricyclic 6-alkylidene penems which act as a inhibitor of class-D enzymes. β-Lactamases hydrolyze β-lactam antibiotics, and as such serve as the primary cause of bacterial resistance. The compounds of the present invention when combined with β-lactam antibiotics will provide an effective treatment against life threatening bacterial infections. In accordance with the present invention there are provided compounds of formula I which are useful for treatment of bacterial infections having class-D enzymes associated therewith: wherein: One of A and B denotes hydrogen and the other an optionally substituted fused tricyclic heteroaryl group; and X is S or O.

  这项发明涉及某些三环6-烷基亚胺基青霉素，其作为类D酶的抑制剂。β-内酰胺酶水解β-内酰胺类抗生素，因此是细菌抗药性的主要原因。本发明的化合物与β-内酰胺类抗生素结合时，将提供一种有效治疗危及生命的细菌感染的方法。根据本发明，提供了以下公式I的化合物，其用于治疗与类D酶相关的细菌感染：其中：A和B中的一个表示氢，另一个表示可选择取代的融合三环杂芳基团；X为S或O。