benzyl (R)-2-(diphenylacetyloxy)butanoate | 1208982-37-9

• 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: benzyl (R)-2-(diphenylacetyloxy)butanoate
• 英文别名: benzyl (2R)-2-(2,2-diphenylacetyl)oxybutanoate
• CAS: 1208982-37-9
• 化学式: C₂₅H₂₄O₄
• 分子量: 388.463
• InChiKey: NUEQWGXDJGPHPQ-JOCHJYFZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.7
• 重原子数：
  29
• 可旋转键数：
  10
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2,2-二苯基乙酸 在 (+)-苯并四咪唑 、 乙酸酐 、 三甲基乙酸酐 、 N,N-二异丙基乙胺 作用下， 以 乙醚 为溶剂， 反应 14.0h， 生成 benzyl (R)-2-(diphenylacetyloxy)butanoate
  参考文献：
  名称：

  A convenient method for the kinetic resolution of racemic 2-hydroxyalkanoates using diphenylacetic anhydride (DPHAA) and a chiral acyl-transfer catalyst

  摘要：

  Diphenylacetic anhydride (DPHAA) was found to be a useful reagent for the kinetic resolution of racemic 2-hydroxyalkanoates in the presence of a catalytic amount of (R)-benzotetramisole ((R)-BTM). The combined use of DPHAA and (R)-BTM effectively produced a variety of the optically active 2-hydroxyalkanoates and the corresponding 2-acyloxyalkanoates from racemic 2-hydroxyalkanoates (s-values = 42-177). A fairly broad substrate scope was demonstrated by this novel chiral induction system. We also revealed that the use of only 0.3 equiv of DPHAA is enough to provide the optically active 2-acyloxyalkanoates in good yields and with excellent ee's by the added use of 0.3 equiv of pivalic anhydride for the kinetic resolution of the racemic 2-hydroxyalkanoates. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2011.08.018

文献信息

• METHOD FOR PRODUCING OPTICALLY ACTIVE 2-HYDROXY ESTER AND NOVEL INTERMEDIATE COMPOUND
  申请人：Shiina Isamu

  公开号：US20110319650A1

  公开（公告）日：2011-12-29

  Disclosed is a method for producing an optically active 2-hydroxy ester, comprising selectively esterifying one enantiomer of a racemic 2-hydroxy ester in a solvent containing a catalyst such as tetramisole or benzotetramisole, and a carboxylic acid anhydride, or a carboxylic acid anhydride and a carboxylic acid. In particular, in the case where the solvent contains a carboxylic acid anhydride, but does not contain a carboxylic acid, as the carboxylic acid anhydride, a carboxylic acid anhydride containing a tertiary or quaternary carbon atom in the a-position is used. On the other hand, in the case where the solvent contains a carboxylic acid anhydride and a carboxylic acid, as the carboxylic acid, a carboxylic acid containing a tertiary or quaternary carbon atom in the a-position is used.

  揭示了一种生产光学活性2-羟基酯的方法，包括在含有催化剂（如四氮唑或苯基四氮唑）和羧酸酐，或者羧酸酐和羧酸的溶剂中，选择性地酯化一个二羟基酯的对映体。特别是，在溶剂中含有羧酸酐但不含有羧酸的情况下，作为羧酸酐，使用含有三级或四级碳原子的α-位置的羧酸酐。另一方面，在溶剂中含有羧酸酐和羧酸的情况下，作为羧酸，使用含有三级或四级碳原子的α-位置的羧酸。
• Kinetic Resolution of the Racemic 2-Hydroxyalkanoates Using the Enantioselective Mixed-Anhydride Method with Pivalic Anhydride and a Chiral Acyl-Transfer Catalyst
  作者：Isamu Shiina、Kenya Nakata、Keisuke Ono、Masuhiro Sugimoto、Akihiro Sekiguchi

  DOI：10.1002/chem.200902257

  日期：2010.1.4

  A variety of optically active 2‐hydroxyalkanoates and the corresponding 2‐acyloxyalkanoates are produced by the kinetic resolution of racemic 2‐hydroxyalkanoates by using achiral 2,2‐diarylacetic acid with hindered carboxylic anhydrides as the coupling reagents. The combined use of diphenylacetic acid, pivalic anhydride, and (+)‐(R)‐benzotetramisole ((R)‐BTM) effectively produces (S)‐2‐hydroxyalkanoates

  外消旋的2-羟基链烷酸酯的动力学拆分，是通过使用非手性的2,2-二芳基乳酸和受阻的羧酸酐作为偶联剂，通过动力学拆分外消旋的2-羟基链烷酸酯而产生的。二苯乙酸，新戊酸酐和（+）-（R）-苯并四咪唑（（R）-BTM）的组合使用可有效地从外消旋2-羟基链烷酸酯生成（S）-2-羟基链烷酸酯和（R）-2-酰基氧基链烷酸酯（s值= 47-202）。这个协议提供了直接从非手性酸diarylacetic和外消旋仲醇所需的手性2-羟基链烷酸酯衍生物不包括所述仲在手性酰基转移催化剂的作用下，通过转酰基反应过程从酸组分与大分子羧酸酐生成混合酸酐，从而制得苯乙醇部分。通过DFT计算揭示了由消旋混合物中包含的（R）-2-羟基链烷酸酯提供所需（R）-2-酰基氧基链烷酸酯的过渡态，并讨论了过渡形式的结构特征。