A<i>N,N′</i>-Dioxide-Copper(II) Complex as an Efficient Catalyst for the Enantioselective and Diastereoselective Mannich-Type Reaction of Glycine Schiff Bases with Aldimines
作者:Deju Shang、Yanling Liu、Xin Zhou、Xiaohua Liu、Xiaoming Feng
DOI:10.1002/chem.200900118
日期:2009.4.6
A highly diastereo‐ and enantioselective Mannich‐type reaction of glycine Schiff base 1 has been developed by using the N,N′‐dioxide L‐CuII complex as a catalyst. Various optically active anti‐α,β‐diamino acid esters were obtained in good yields with up to 96:4 d.r. and 97 % ee. This straightforward method features a low catalyst loading and mild reaction conditions.
温和的举止!通过使用N,N'-二氧化物L- Cu II配合物作为催化剂,开发了甘氨酸Schiff碱1的高度非对映和对映选择性曼尼希型反应。以高达96:4 dr和97%ee的高收率获得了各种光学活性的抗α,β-二氨基酸酯 。这种简单的方法具有催化剂负载低和反应条件温和的特点。