A Simple Organocatalytic Enantioselective Cyclopropanation of α,β-Unsaturated Aldehydes
作者:Ramon Rios、Henrik Sundén、Jan Vesely、Gui-Ling Zhao、Pawel Dziedzic、Armando Córdova
DOI:10.1002/adsc.200700032
日期:2007.5.7
A highly chemo- and enantioselective organocatalytic cyclopropanation of α,β-unsaturated aldehydes with bromomalonate and 2-bromoacetoacetate esters is presented. The reaction is catalyzed by chiral amines and gives access to 2-formylcyclopropanes in high yields and up to 99 % ee.
提出了具有溴代丙二酸酯和2-溴代乙酰乙酸酯的α,β-不饱和醛的高度化学和对映选择性的有机催化环丙烷化。该反应由手性胺催化,可以高收率和高达99%ee的产率生成2-甲酰基环丙烷。