2-(2,4-二氯苯氧基)丙酸丁酯 | 25184-73-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 2-(2,4-二氯苯氧基)丙酸丁酯
• 英文名称: n-butyl 2-(2,4-dichlorophenoxy)propanoate
• 英文别名: Butyl 2-(2,4-dichlorophenoxy)propanoate
• CAS: 25184-73-0
• 化学式: C₁₃H₁₆Cl₂O₃
• mdl: MFCD23153756
• 分子量: 291.174
• InChiKey: BVZWLEASLFETCA-UHFFFAOYSA-N

物化性质

• 保留指数：
  1780.8

计算性质

• 辛醇/水分配系数(LogP)：
  5
• 重原子数：
  18
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.461
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-(2,4-二氯苯氧基)丙酸丁酯 在 lipase (PS-30) 作用下， 以 水 为溶剂， 生成 (R)-2-(2,4-二氯苯氧基)丙酸 、 (2S)-2-(2,4-二氯苯氧基)丙酸
  参考文献：
  名称：

  Dynamic Enzymatic Resolution of Thioesters

  摘要：

  A detailed investigation of several issues related to the enzymatic resolution of thioesters under conditions of continuous racemization of substrate was conducted. The kinetic acidity of the alpha-protons of a series of alpha-substituted propionate thioesters was studied. It was found that the rate of alpha-proton exchange could be enhanced as much as 20-fold by variation of the thiol moiety, increasing the range of compounds to which enzymatic dynamic resolution may be applied. The relative rates of hydrolysis of ethyl butyrate and ethyl thiobutyrate by several enzymes commonly used in enzymatic resolution were determined. All of the enzymes studied exhibited similar rates of thioester and oxoester hydrolysis except for the esterase from pig liver, which showed very low activity in thioester hydrolysis. Dynamic resolution of the propargyl and trifluoroethyl thioesters of alpha-phenylpropionate was conducted using subtilisin Carlsberg as a catalyst. These examples demonstrated that enzymatic dynamic resolution can be applied even when the rate of alpha-proton exchange and the enantioselectivity of the enzyme are fairly low. A dynamic enzymatic transesterification procedure was demonstrated in the resolution of the trifluoroethyl thioester of alpha-(2,4-dichlorophenoxy)propionate, and product was obtained in 93% ee. This work helps expand and define the scope of enzymatic dynamic resolution of thioesters.

  DOI：

  10.1021/ja980445b
• 作为产物：
  描述：

  2,4-滴丙酸 在 草酰氯 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 生成 2-(2,4-二氯苯氧基)丙酸丁酯
  参考文献：
  名称：

  Dynamic Enzymatic Resolution of Thioesters

  摘要：

  A detailed investigation of several issues related to the enzymatic resolution of thioesters under conditions of continuous racemization of substrate was conducted. The kinetic acidity of the alpha-protons of a series of alpha-substituted propionate thioesters was studied. It was found that the rate of alpha-proton exchange could be enhanced as much as 20-fold by variation of the thiol moiety, increasing the range of compounds to which enzymatic dynamic resolution may be applied. The relative rates of hydrolysis of ethyl butyrate and ethyl thiobutyrate by several enzymes commonly used in enzymatic resolution were determined. All of the enzymes studied exhibited similar rates of thioester and oxoester hydrolysis except for the esterase from pig liver, which showed very low activity in thioester hydrolysis. Dynamic resolution of the propargyl and trifluoroethyl thioesters of alpha-phenylpropionate was conducted using subtilisin Carlsberg as a catalyst. These examples demonstrated that enzymatic dynamic resolution can be applied even when the rate of alpha-proton exchange and the enantioselectivity of the enzyme are fairly low. A dynamic enzymatic transesterification procedure was demonstrated in the resolution of the trifluoroethyl thioester of alpha-(2,4-dichlorophenoxy)propionate, and product was obtained in 93% ee. This work helps expand and define the scope of enzymatic dynamic resolution of thioesters.

  DOI：

  10.1021/ja980445b

文献信息

• 一种氯代苯氧羧酸酯的制备方法
  申请人：山东润博生物科技有限公司

  公开号：CN108947820A

  公开（公告）日：2018-12-07

  本发明提供了一种氯代苯氧羧酸酯的制备方法，包括以下步骤：苯氧羧酸酯在催化剂A和催化剂B的作用下，和氯化剂进行2位和/或4位的选择性氯化反应，得到氯代苯氧羧酸酯；所述催化剂A为路易斯酸；所述催化剂B具有以下结构式：R1＇‑S‑R2＇。本发明通过对工艺路线的重新设计，对催化剂和氯化剂的精细筛选，有效地提高了氯化选择性同时避免了有效成分的损失，所得氯代苯氧羧酸酯的含量可达98.5％以上，收率可达99％以上。