16-bromo-3-methoxyestra-1,3,5(10),16-tetraene | 135616-01-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: 16-bromo-3-methoxyestra-1,3,5(10),16-tetraene
• 英文别名: (8S,9S,13S,14S)-16-bromo-3-methoxy-13-methyl-6,7,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthrene
• CAS: 135616-01-2
• 化学式: C₁₉H₂₃BrO
• 分子量: 347.295
• InChiKey: VZULSUNUQZBDLQ-AKHDSKFASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.8
• 重原子数：
  21
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.58
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  3-methoxyestra-1,3,5(10),16-tetraene-16-carboxylic acid 在 吡啶 、 4-二甲氨基吡啶 、 草酰氯 、 偶氮二异丁腈 、 三氯溴甲烷 作用下， 生成 16-bromo-3-methoxyestra-1,3,5(10),16-tetraene
  参考文献：
  名称：

  Regioselective conversion of cycloalkanones to vinyl bromides with 1,2-functionality transposition. A general stratagem

  摘要：

  Cyclic beta-keto esters, available by regioselective acylation of cycloalkanone enolates, are rapidly transformed to alpha,beta-unsaturated acids. This functionality transposition allows the derived 3-hydroxy-4-methylthiazole-2-(3H)-thione derivatives to serve as precursors to synthetically useful vinyl bromides. The process involves heating the hydroxamate ester with AIBN in bromotrichloromethane solution. Alkylative and ring contractive variants of the methodology are highlighted. The short sequence makes available precursors to vinyl anions that are not otherwise conveniently accessible.

  DOI：

  10.1021/jo00021a044

文献信息

• Regioselective conversion of cycloalkanones to vinyl bromides with 1,2-functionality transposition. A general stratagem
  作者：Leo A. Paquette、Karl Dahnke、Julien Doyon、Wei He、Kenetha Wyant、Dirk Friedrich

  DOI：10.1021/jo00021a044

  日期：1991.10

  Cyclic beta-keto esters, available by regioselective acylation of cycloalkanone enolates, are rapidly transformed to alpha,beta-unsaturated acids. This functionality transposition allows the derived 3-hydroxy-4-methylthiazole-2-(3H)-thione derivatives to serve as precursors to synthetically useful vinyl bromides. The process involves heating the hydroxamate ester with AIBN in bromotrichloromethane solution. Alkylative and ring contractive variants of the methodology are highlighted. The short sequence makes available precursors to vinyl anions that are not otherwise conveniently accessible.