(+/-)-ethyl 7-(5-(tert-butoxycarbonyl)-2,5-diazabicyclo-[4.1.0]heptan-2-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate | 1228675-31-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 喹啉及其衍生物
• 英文名称: (+/-)-ethyl 7-(5-(tert-butoxycarbonyl)-2,5-diazabicyclo-[4.1.0]heptan-2-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate
• CAS: 1228675-31-7
• 化学式: C₂₅H₃₀FN₃O₅
• 分子量: 471.529
• InChiKey: DAEPIWGNNKSSFO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.85
• 重原子数：
  34.0
• 可旋转键数：
  4.0
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  81.08
• 氢给体数：
  0.0
• 氢受体数：
  7.0

反应信息

• 作为反应物：
  描述：

  (+/-)-ethyl 7-(5-(tert-butoxycarbonyl)-2,5-diazabicyclo-[4.1.0]heptan-2-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate 在 盐酸 、 水 作用下， 反应 2.0h， 以80%的产率得到(+/-)-7-(2,5-diazabicyclo-[4.1.0]heptan-2-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid hydrochloride
  参考文献：
  名称：

  Substituted 2,5-diazabicyclo[4.1.0]heptanes and their application as general piperazine surrogates: synthesis and biological activity of a Ciprofloxacin analogue

  摘要：

  Piperazines and modified piperazines, such as homopiperazines and 2-methylpiperazines, are found in a wide range of pharmaceutical substances and biologically active molecules. In this study 2,5-diazabicyclo[4.1.0]heptanes, in which a cyclopropane ring is fused onto a piperazine ring, are described as modified piperazine analogues. Differentially N,N'-disubstituted and N-monosubstituted compounds can be readily prepared from 2-ketopiperazine in a few steps, using a Simmons-Smith reaction of 1,2,3,4-tetrahydropyrazines with diethylzinc and diiodomethane for the key cyclopropane ring formation. An analogue of the fluoroquinolone antibacterial Ciprofloxacin was synthesized using a palladium-catalyzed Buchwald-Hartwig cross-coupling to attach the diazabicyclo[4.1.0]heptane core to the 7-position of the fluoroquinolone core. The resultant analogue was demonstrated to have similar antibacterial activity to the parent drug Ciprofloxacin. X-ray crystallographic analysis of this analogue reveals a distorted piperazine ring in the diazabicyclo[4.1.0]heptane core. The pK(a) of the conjugate acid of N-Cbz-monoprotected 2,5-diazabicyclo[4.1.0]heptane was determined to be 6.74 +/- 0.05, which is 1.3 pK(a) units lower than the corresponding N-Cbz-monoprotected piperazine compound. The lower basicity of diazabicyclo[4.1.0]heptanes is due to the electron-withdrawing character of the adjacent cyclopropane rings. The modified physicochemical and structural properties of diazabicyclo[4.1.0]heptanes relative to piperazines are expected to lead to interesting changes in the pharmacokinetic and biological activity profile of these molecules. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2010.02.046
• 作为产物：
  描述：

  (+/-)-tert-butyl 2,5-diazabicyclo[4.1.0]heptane-2-carboxylate 、 7-氯-1-环丙基-6-氟-4-氧代-1,4-二氢-喹啉-3-羧酸乙基酯 在 tris-(dibenzylideneacetone)dipalladium(0) 、 caesium carbonate 、 R-(+)-1,1'-联萘-2,2'-双二苯膦 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 16.0h， 以57%的产率得到(+/-)-ethyl 7-(5-(tert-butoxycarbonyl)-2,5-diazabicyclo-[4.1.0]heptan-2-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate
  参考文献：
  名称：

  Substituted 2,5-diazabicyclo[4.1.0]heptanes and their application as general piperazine surrogates: synthesis and biological activity of a Ciprofloxacin analogue

  摘要：

  Piperazines and modified piperazines, such as homopiperazines and 2-methylpiperazines, are found in a wide range of pharmaceutical substances and biologically active molecules. In this study 2,5-diazabicyclo[4.1.0]heptanes, in which a cyclopropane ring is fused onto a piperazine ring, are described as modified piperazine analogues. Differentially N,N'-disubstituted and N-monosubstituted compounds can be readily prepared from 2-ketopiperazine in a few steps, using a Simmons-Smith reaction of 1,2,3,4-tetrahydropyrazines with diethylzinc and diiodomethane for the key cyclopropane ring formation. An analogue of the fluoroquinolone antibacterial Ciprofloxacin was synthesized using a palladium-catalyzed Buchwald-Hartwig cross-coupling to attach the diazabicyclo[4.1.0]heptane core to the 7-position of the fluoroquinolone core. The resultant analogue was demonstrated to have similar antibacterial activity to the parent drug Ciprofloxacin. X-ray crystallographic analysis of this analogue reveals a distorted piperazine ring in the diazabicyclo[4.1.0]heptane core. The pK(a) of the conjugate acid of N-Cbz-monoprotected 2,5-diazabicyclo[4.1.0]heptane was determined to be 6.74 +/- 0.05, which is 1.3 pK(a) units lower than the corresponding N-Cbz-monoprotected piperazine compound. The lower basicity of diazabicyclo[4.1.0]heptanes is due to the electron-withdrawing character of the adjacent cyclopropane rings. The modified physicochemical and structural properties of diazabicyclo[4.1.0]heptanes relative to piperazines are expected to lead to interesting changes in the pharmacokinetic and biological activity profile of these molecules. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2010.02.046