tert-butyl 7-chloro-4-ethylhept-2-enoate | 138542-01-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: tert-butyl 7-chloro-4-ethylhept-2-enoate
• CAS: 138542-01-5；138542-02-6
• 化学式: C₁₃H₂₃ClO₂
• 分子量: 246.777
• InChiKey: JFVXIWWAQODNAV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.93
• 重原子数：
  16.0
• 可旋转键数：
  6.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  tert-butyl 7-chloro-4-ethylhept-2-enoate 在 正丁基锂 、 sodium iodide 作用下， 以 四氢呋喃 、 丙酮 为溶剂， 反应 24.1h， 生成 tert-butyl 2-[(1R,2S)-2-ethylcyclopentyl]acetate
  参考文献：
  名称：

  Stereochemistry of metal-halogen exchange-initiated intramolecular conjugate addition reactions in the construction of 5-membered carbocycles

  摘要：

  The stereochemistry of some lithium-iodine exchange-initiated cyclization reactions of model omega-iodo, gamma-substituted activated olefins has been studied. The stereoselectivities of these anionic cyclization reactions have been found to be a function of the olefin activator employed, reaction conditions, Michael acceptor olefin geometry, the nature of the gamma-substituent, and, in some cases, the presence of additives. Cyclization reactions of iodides possessing E olefin geometry give a moderate preference for trans cyclopentane formation while Z olefin geometry leads to extremely high (> 300:1) trans product selectivity. Cyclization reactions of E olefins under radical conditions were found to be slightly more trans-selective than those observed under anionic conditions although Z olefin geometry again promotes very high trans product selectivity. The presence of the allylic methoxyl group in (E)-7d leads to cis selectivity under both anionic and radical conditions. Intramolecular complexation involving the reactive carbon center and the methoxyl group is suggested in both modes as a possible explanation for this cis product selectivity.

  DOI：

  10.1021/jo00031a031
• 作为产物：
  描述：

  5-氯-2-乙基戊酸乙酯 在 18-冠醚-6 、 双(三甲基硅烷基)氨基钾 、 二异丁基氢化铝 作用下， 以 正己烷 、 甲苯 为溶剂， 反应 0.83h， 生成 tert-butyl 7-chloro-4-ethylhept-2-enoate
  参考文献：
  名称：

  Stereochemistry of metal-halogen exchange-initiated intramolecular conjugate addition reactions in the construction of 5-membered carbocycles

  摘要：

  The stereochemistry of some lithium-iodine exchange-initiated cyclization reactions of model omega-iodo, gamma-substituted activated olefins has been studied. The stereoselectivities of these anionic cyclization reactions have been found to be a function of the olefin activator employed, reaction conditions, Michael acceptor olefin geometry, the nature of the gamma-substituent, and, in some cases, the presence of additives. Cyclization reactions of iodides possessing E olefin geometry give a moderate preference for trans cyclopentane formation while Z olefin geometry leads to extremely high (> 300:1) trans product selectivity. Cyclization reactions of E olefins under radical conditions were found to be slightly more trans-selective than those observed under anionic conditions although Z olefin geometry again promotes very high trans product selectivity. The presence of the allylic methoxyl group in (E)-7d leads to cis selectivity under both anionic and radical conditions. Intramolecular complexation involving the reactive carbon center and the methoxyl group is suggested in both modes as a possible explanation for this cis product selectivity.

  DOI：

  10.1021/jo00031a031