| 1266614-98-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• CAS: 1266614-98-5
• 化学式: C₁₉H₃₄Si₂
• 分子量: 318.65
• InChiKey: PSGKRWKAHHMICT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.36
• 重原子数：
  21
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.68
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  2-Methyl-5-acetylcyclohexanon 、 三甲基硅烷化重氮甲烷 在 正丁基锂 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 为溶剂， 反应 2.5h， 以51%的产率得到
  参考文献：
  名称：

  Selectivity Control in Alkylidene Carbene-Mediated C−H Insertion and Allene Formation

  摘要：

  Regioselectivity of alkylidene carbene-mediated C-H insertion was explored utilizing electronic, conformational, steric, and stereoelectronic effects. Relying on these factors, highly regio- and chemoselective carbene insertion reaction of C-H bonds in different environments could be obtained. The observed selectivity clearly indicates that an electronic effect plays a more important role than steric effect. In general, C-H bonds in conformationally rigid cyclic environments are less reactive than those in acyclic systems toward carbene insertion, and in this situation, a competing intermolecular reaction between alkylidene carbene and trimethylsilyldiazomethane led to the formation of allenylsilanes. The formation of allenylsilane becomes more favorable as the concentration of reaction becomes higher, as well as the C-H bonds undergoing insertion becomes electronically and conformationally deactivated.

  DOI：

  10.1021/jo102180f

文献信息

• Selectivity Control in Alkylidene Carbene-Mediated C−H Insertion and Allene Formation
  作者：Jun-Cheng Zheng、Sang Young Yun、Chunrui Sun、Nam-Kyu Lee、Daesung Lee

  DOI：10.1021/jo102180f

  日期：2011.2.18

  Regioselectivity of alkylidene carbene-mediated C-H insertion was explored utilizing electronic, conformational, steric, and stereoelectronic effects. Relying on these factors, highly regio- and chemoselective carbene insertion reaction of C-H bonds in different environments could be obtained. The observed selectivity clearly indicates that an electronic effect plays a more important role than steric effect. In general, C-H bonds in conformationally rigid cyclic environments are less reactive than those in acyclic systems toward carbene insertion, and in this situation, a competing intermolecular reaction between alkylidene carbene and trimethylsilyldiazomethane led to the formation of allenylsilanes. The formation of allenylsilane becomes more favorable as the concentration of reaction becomes higher, as well as the C-H bonds undergoing insertion becomes electronically and conformationally deactivated.