(R)-2-decanyl tosylate | 130566-82-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (R)-2-decanyl tosylate
• 英文别名: [(2R)-decan-2-yl] 4-methylbenzenesulfonate
• CAS: 130566-82-4
• 化学式: C₁₇H₂₈O₃S
• 分子量: 312.474
• InChiKey: HEOQSGMVJDBNBC-MRXNPFEDSA-N

物化性质

• 沸点：
  415.1±14.0 °C(Predicted)
• 密度：
  1.031±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6
• 重原子数：
  21
• 可旋转键数：
  10
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.65
• 拓扑面积：
  51.8
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (R)-2-decanyl tosylate 在 正丁基锂 、 甲基溴化镁 、 magnesium 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 为溶剂， 反应 4.67h， 生成 5R,9S-dimethylheptadecane
  参考文献：
  名称：

  Stereospecific inversion of secondary tosylates to yield chiral methyl-branched building blocks, applied to the asymmetric synthesis of leafminer sex pheromones

  摘要：

  All four of the possible stereoisomers of 5,9-dimethylheptadecane, the major sex pheromone component secreted by female moths of the mountain-ash bentwing (Leucoptera scitella), were synthesized by the coupling of two chiral blocks with a methyl branch at the 2- or 3-position. The blocks were prepared by applying the stereospecific inversion of secondary tosylates, which were derived from (R)- and (S)-propylene oxide, and their enantiopurities were confirmed by chiral HPLC analysis. (c) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2012.05.023
• 作为产物：
  描述：

  1-溴代庚烷 在 甲基溴化镁 、 三甲胺盐酸盐 、 magnesium 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 4.0h， 生成 (R)-2-decanyl tosylate
  参考文献：
  名称：

  Stereospecific inversion of secondary tosylates to yield chiral methyl-branched building blocks, applied to the asymmetric synthesis of leafminer sex pheromones

  摘要：

  All four of the possible stereoisomers of 5,9-dimethylheptadecane, the major sex pheromone component secreted by female moths of the mountain-ash bentwing (Leucoptera scitella), were synthesized by the coupling of two chiral blocks with a methyl branch at the 2- or 3-position. The blocks were prepared by applying the stereospecific inversion of secondary tosylates, which were derived from (R)- and (S)-propylene oxide, and their enantiopurities were confirmed by chiral HPLC analysis. (c) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2012.05.023

文献信息

• Clarification of the Stereochemical Course of Nucleophilic Substitution of Arylsulfonate-Based Nucleophile Assisting Leaving Groups
  作者：D. Christopher Braddock、Rebecca H. Pouwer、Jonathan W. Burton、Phillip Broadwith

  DOI：10.1021/jo900991z

  日期：2009.8.21

  Secondary alcohols modified as tosylates, PEG-sulfonates, or quisylates undergo inversion of configuration at the reacting center when treated with lithium halide in acetone at reflux, where the PEG-sulfonates and quisylates are substantially more reactive. In sterically hindered cases, elimination is a competing process. In contrast, when treated with TiCl4, simple secondary sulfonates give chloride

  当在丙酮中用卤化锂在回流下处理时，被修饰为对甲苯磺酸盐，PEG-磺酸盐或对甲苯磺酸盐的仲醇在反应中心发生构型转化，其中PEG-磺酸盐和对甲苯磺酸盐的反应性更高。在空间受限的情况下，淘汰是一个相互竞争的过程。相反，当用TiCl 4处理时，简单的仲磺酸盐使氯化物产物的构型部分反转。在这些条件下，在给定的烷基磺酸盐底物中观察到的任何构型保留都可能是由于相邻基团的参与或对碳正离子（或离子对）的非对映选择性攻击，而不是S N i机理。