Highly Diastereo- and Enantioselective Cyclopropanation of 1,2-Disubstituted Alkenes
作者:Jun Li、Sai-Hu Liao、Hu Xiong、You-Yun Zhou、Xiu-Li Sun、Yue Zhang、Xiao-Guang Zhou、Yong Tang
DOI:10.1002/anie.201203218
日期:2012.8.27
pendant C2‐symmetry‐breaking groups, for the Cu‐catalyzed asymmetric cyclopropanation of 1,2‐disubstituted alkenes has been developed. Under mild reaction conditions, both cis‐ and trans‐1,2‐substituted alkenes can be converted into the corresponding 1,2,3‐trisubstituted cyclopropanes with high levels of diastereo‐ and enantioselectivity (see scheme).
援助之手:已开发出一系列双(恶唑啉)配体,它们含有侧链C 2-对称断裂基团,用于铜催化的1,2-二取代烯烃的不对称环丙烷化。在温和的反应条件下,顺式和反式1,2-取代的烯烃都可以转化为相应的具有高非对映和对映选择性的1,2,3-三取代的环丙烷(参见方案)。