5-(2-Bromoethyl)-5-pentanolide | 152668-02-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: 5-(2-Bromoethyl)-5-pentanolide
• 英文别名: 6-(2-bromoethyl)-tetrahydro-2H-pyran-2-one；6-(2-Bromoethyl)oxan-2-one
• CAS: 152668-02-5
• 化学式: C₇H₁₁BrO₂
• 分子量: 207.067
• InChiKey: FHEQVWQLHIOUCE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  10
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  5-(2-Bromoethyl)-5-pentanolide 在 Raney nickel 氢气 、 硼酸 、 溶剂黄146 、 N,N-二异丙基乙胺 作用下， 以 乙醇 、 水 为溶剂， 反应 27.67h， 生成 7,8-dimethyl-10-[2-(6-oxotetrahydro-2H-pyran-2-yl)ethyl]benzo[g]pteridine-2,4(3H,10H)-dione
  参考文献：
  名称：

  [EN] FLAVIN DERIVATIVES
  [FR] DÉRIVÉS DE LA FLAVINE

  摘要：

  本发明涉及新型黄素衍生物和其他黄素衍生物，它们的用途以及用作核糖开关配体和/或抗感染剂的组合物。该发明还提供了制备新型黄素衍生物的方法。

  公开号：

  WO2010019208A1
• 作为产物：
  描述：

  2-(2-bromoethyl)cyclopentanone 在 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 以64%的产率得到5-(2-Bromoethyl)-5-pentanolide
  参考文献：
  名称：

  Intramolecular nucleophilic acyl substitution reactions of halo-substituted esters and lactones. New applications of organosamarium reagents

  摘要：

  Intramolecular nucleophilic acyl substitution reactions involving a broad range of halo substituted carboxylic acid derivatives have been accomplished in excellent yield employing samarium(II) iodide as the reductive coupling agent. Although particular substrates cyclized most effectively in THF in the presence of tripiperidinophosphine oxide, carboxylic acid esters, the focus of this report, cyclize equally well without such an additive in the presence of a catalytic quantity of iron(III) complexes. Thus a comprehensive series of halo substituted esters were cyclized in excellent yield to the corresponding 4-, 5-, and 6-membered carbocycles. The reaction is extremely mild and selective as demonstrated by experiments wherein alkyl chlorides, acetals, and olefins remain completely intact under the reaction conditions. In addition to introducing a convenient procedure for preparing stereodefined spirocyclic systems, a new ring expansion sequence has been developed that appears extremely general for the preparation of various ring systems.

  DOI：

  10.1021/jo00077a053

文献信息

• FLAVIN DERIVATIVES
  申请人：Gadwood Robert

  公开号：US20120077781A1

  公开（公告）日：2012-03-29

  The present invention relates novel flavin derivatives and other flavin derivatives, their use and compositions for use as riboswitch ligands and/or anti-infectives. The invention also provides method of making novel flavin derivatives.

  本发明涉及新型的黄素衍生物和其他黄素衍生物，它们的用途和组合物用作核糖开关配体和/或抗感染剂。本发明还提供了制备新型黄素衍生物的方法。
• [EN] FLAVIN DERIVATIVES<br/>[FR] DÉRIVÉS DE LA FLAVINE
  申请人：BIORELIX PHARMACEUTICALS INC

  公开号：WO2010019208A1

  公开（公告）日：2010-02-18

  The present invention relates novel flavin derivatives and other flavin derivatives, their use and compositions for use as riboswitch ligands and/or anti-infectives. The invention also provides method of making novel flavin derivatives.

  本发明涉及新型黄素衍生物和其他黄素衍生物，它们的用途以及用作核糖开关配体和/或抗感染剂的组合物。该发明还提供了制备新型黄素衍生物的方法。
• Intramolecular nucleophilic acyl substitution reactions of halo-substituted esters and lactones. New applications of organosamarium reagents
  作者：Gary A. Molander、Jeffrey A. McKie

  DOI：10.1021/jo00077a053

  日期：1993.12

  Intramolecular nucleophilic acyl substitution reactions involving a broad range of halo substituted carboxylic acid derivatives have been accomplished in excellent yield employing samarium(II) iodide as the reductive coupling agent. Although particular substrates cyclized most effectively in THF in the presence of tripiperidinophosphine oxide, carboxylic acid esters, the focus of this report, cyclize equally well without such an additive in the presence of a catalytic quantity of iron(III) complexes. Thus a comprehensive series of halo substituted esters were cyclized in excellent yield to the corresponding 4-, 5-, and 6-membered carbocycles. The reaction is extremely mild and selective as demonstrated by experiments wherein alkyl chlorides, acetals, and olefins remain completely intact under the reaction conditions. In addition to introducing a convenient procedure for preparing stereodefined spirocyclic systems, a new ring expansion sequence has been developed that appears extremely general for the preparation of various ring systems.