具有两个手性中心的铜-(希夫碱)配合物催化的不对称环丙烷化反应。

Enantiomer Pub Date : 2002-11-01 DOI:10.1080/10242430215705
Changsheng Jiang, Zhang Ming, Qitao Tan, Dai Qian, Tianpa You
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引用次数: 11

摘要

以1,2-二苯基-2-氨基乙醇为原料,合成了一系列具有两个手性中心的铜(希夫碱)配合物,并用于催化乙烯与重氮乙酸酯的不对称环丙烷化反应。提出了一种可以解释观测结果的机制。其中一些配合物也是1,1-二苯乙烯与重氮乙酸乙酯的不对称环丙烷化反应的有效催化剂,e.e.高达98.6%。在不使用溶剂的情况下,e.e.为80.7%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Asymmetric cyclopropanation catalyzed by a series of copper-(Schiff-base) complexes with two chiral centers.

A series of copper(Schiff-base) complexes with two chiral centers derived from 1,2-diphenyl-2-amino-ethanol were synthesized and applied to catalyze the asymmetric cyclopropanation of ethenes with diazoacetates. A mechanism that can explain the observed results was proposed. Some of these complexes were also efficient catalysts for asymmetric cyclopropanation of 1,1-diphenylethene with ethyl diazoacetate, affording high e.e. of up to 98.6%. An e.e. of 80.7% was achieved when no solvent was used.

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