sodium;(5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylidene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate | 1020108-51-3

• 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: sodium;(5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylidene)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate
• CAS: 1020108-51-3
• 化学式: C₁₆H₁₂N₃O₃S₂*Na
• 分子量: 381.411
• InChiKey: MRYQNSOCZWWRRK-MBZBDMRWSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  -1.83
• 重原子数：
  25
• 可旋转键数：
  2
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  131
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为产物：
  描述：

  4-nitrobenzyl (5R)-6-[(acetyloxy)(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-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20%的产率得到sodium;(5R,6Z)-7-oxo-6-(5,6,7,8-tetrahydroimidazo[2,1-b][1,3]benzothiazol-2-ylmethylidene)-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

• 5,5,6-Fused tricycles bearing imidazole and pyrazole 6-methylidene penems as broad-spectrum inhibitors of β-lactamases
  作者：Aranapakam M. Venkatesan、Atul Agarwal、Takao Abe、Hideki Ushirogochi、Mihira Ado、Takasaki Tsuyoshi、Osvaldo Dos Santos、Zhong Li、Gerry Francisco、Yang I. Lin

  DOI：10.1016/j.bmc.2007.11.006

  日期：2008.2.15

  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.