(S)-7-methylheptacosane | 1448311-84-9

• 分子结构分类: 有机化合物 - 碳氢化合物 - 饱和烃
• 英文名称: (S)-7-methylheptacosane
• 英文别名: (7S)-7-methylheptacosane
• CAS: 1448311-84-9
• 化学式: C₂₈H₅₈
• 分子量: 394.769
• InChiKey: MEQXGAAQVQYDIP-NDEPHWFRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  15.1
• 重原子数：
  28
• 可旋转键数：
  24
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 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：

  (2S)-2-methyloctan-1-ol 在 吡啶 、 正丁基锂 、 10% rhodium on carbon 、 氢气 、 sodium carbonate 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， -78.0~-10.0 ℃ 、101.33 kPa 条件下， 反应 19.17h， 生成 (S)-7-methylheptacosane
  参考文献：
  名称：

  Efficient asymmetric synthesis of long chain methyl-branched hydrocarbons, components of the contact sex pheromone of females of the cerambycid beetle, Neoclytus acuminatus acuminatus

  摘要：

  Both enantiomers of 7-methylheptacosane and 7-methylpentacosane, the major components of the female-produced contact sex pheromone of the red-headed ash borer beetle (Neoclytus acuminatus accuminatus) were synthesized in 62-68% overall yield (six steps) via alkynylation of the triflate of a shared chiral alcohol intermediate (R)- or (S)-2-methyloctanol. The enantiomers of the shared intermediate were prepared via acylation and subsequent asymmetic methylation of (R)- and (S)-4-isopropyloxazolidin-2-one chiral auxiliaries, respectively. The methodology can be readily adapted for the preparation of analogues with any desired chain length and methyl branch positions. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2013.05.021

文献信息

• Efficient asymmetric synthesis of long chain methyl-branched hydrocarbons, components of the contact sex pheromone of females of the cerambycid beetle, Neoclytus acuminatus acuminatus
  作者：Jan E. Bello、Jocelyn G. Millar

  DOI：10.1016/j.tetasy.2013.05.021

  日期：2013.7

  Both enantiomers of 7-methylheptacosane and 7-methylpentacosane, the major components of the female-produced contact sex pheromone of the red-headed ash borer beetle (Neoclytus acuminatus accuminatus) were synthesized in 62-68% overall yield (six steps) via alkynylation of the triflate of a shared chiral alcohol intermediate (R)- or (S)-2-methyloctanol. The enantiomers of the shared intermediate were prepared via acylation and subsequent asymmetic methylation of (R)- and (S)-4-isopropyloxazolidin-2-one chiral auxiliaries, respectively. The methodology can be readily adapted for the preparation of analogues with any desired chain length and methyl branch positions. (C) 2013 Elsevier Ltd. All rights reserved.