Enantioselective synthesis of quaternary stereogenic centers through catalytic asymmetric addition of dimethylzinc to α-ketoesters with chiral cis-cyclopropane-based amide alcohol as ligand
作者:Bing Zheng、Shicong Hou、Zhiyuan Li、Hongchao Guo、Jiangchun Zhong、Min Wang
DOI:10.1016/j.tetasy.2009.07.050
日期:2009.9
A new amino alcohol with a chiral cyclopropane backbone has been developed and used in the catalytic asymmetric diethylzinc addition to various types of α-ketoesters. This cyclopropane-based chiral amino alcohol shows moderate enantioselectivity in the addition of organozinc to α-ketoesters. For dimethylzinc addition to α-ketoesters, up to 81% ee are obtained, respectively.
已开发出具有手性
环丙烷骨架的新型
氨基醇,并将其用于催化不对称
二乙基锌除各种类型的α-
酮酸酯中。这种基于
环丙烷的手性
氨基醇在将
有机锌添加到α-
酮酸酯中时显示出中等的对映选择性。对于将二甲基
锌添加到α-
酮酸酯中,分别获得了高达81%的ee。