(2R*,3S*)-1-(Tosyloxy)-3-bromohexan-2-ol | 137369-61-0

• 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: (2R*,3S*)-1-(Tosyloxy)-3-bromohexan-2-ol
• CAS: 137369-61-0
• 化学式: C₁₃H₁₉BrO₄S
• 分子量: 351.261
• InChiKey: AHZGBHROAZQBFK-OLZOCXBDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.62
• 重原子数：
  19.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  63.6
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  (2S,3S)-(-)-3-丙基环氧乙烷甲醇 在 4-二甲氨基吡啶 、 Amberlyst 15 、 三乙胺 、 lithium bromide 、 三甲氧基磷 作用下， 以 异辛烷 、 二氯甲烷 、 乙腈 为溶剂， 反应 5.0h， 生成 (2R*,3S*)-1-(Tosyloxy)-3-bromohexan-2-ol
  参考文献：
  名称：

  C-1 Reactivity of 2,3-Epoxy Alcohols via Oxirane Opening with Metal Halides: Applications and Synthesis of Naturally Occurring 2,3-Octanediol, Muricatacin, 3-Octanol, and 4-Dodecanolide

  摘要：

  The C-1 reactivity of 2,3-epoxy alcohols and derivatives has been examined thoroughly. In the first approach a rearrangement opening of 2,3-epoxy alcohols with LiI leads to 1-iodo 2,3-diols with erythro or three stereochemistry starting from trans or cis epoxy alcohols. Subsequent coupling with a carbon nucleophile can lead to a series of vicinal diols with predicted relative and absolute stereochemistry: the described methodology has been applied to the asymmetric synthesis of the naturally occurring (S,S)-2,3-octanediol and (R,R)-muricatacin. The second approach, starting from easily available tosyloxy epoxides, leads to the highly regioselective opening of the oxirane ring with Li halides. The 3-iodohydrins obtained can be reduced to the corresponding 1-(tosyloxy)alkan-2-ols and then coupled with common carbon nucleophiles to afford, in high yields, optically active alcohols. This methodology has been applied to the asymmetric synthesis of naturally occurring pheromones like 3(R)-octanol and 4(R)-dodecanolide.

  DOI：

  10.1021/jo00120a025

文献信息

• Highly Regioselective Ring Opening of 2,3-Epoxy Alcohol Methanesulfonates
  作者：Lian-xun Gao、Hitoshi Saitoh、Fei Feng、Akio Murai

  DOI：10.1246/cl.1991.1787

  日期：1991.10

  Reaction of 2,3-epoxy-1-ol methanesulfonates with diethylaluminum chloride or with the mixture of diethylaluminum chloride and diethylamine hydrobromide in dichloromethane gave rise to regioselectively the corresponding 3-chloro- and 3-bromo-1,2-diol 1-methanesulfonates, respectively, in excellent yields.

  将 2,3-环氧-1-醇甲烷磺酸盐与二乙基氯化铝或二乙基氯化铝与氢溴酸二乙胺的混合物在二氯甲烷中反应，可分别得到相应的 3-氯和 3-溴-1,2-二醇 1-甲烷磺酸盐，且产量极高。