Highly Enantioselective Cascade Reaction Catalyzed by Squaramides: the Synthesis of CF<sub>3</sub>-Containing Chromanes
作者:Yuanyuan Zhu、Xiaoyuan Li、Qiao Chen、Jinhuan Su、Fengjing Jia、Shuai Qiu、Mingxia Ma、Quantao Sun、Wenjin Yan、Kairong Wang、Rui Wang
DOI:10.1021/acs.orglett.5b01799
日期:2015.8.7
A catalytic asymmetric method for the synthesis of 2-CF3 chromanes has been described. Generally, the squaramide-catalyzed cascade reaction of 2-hydroxychalcones with beta-CF3-nitroalkenes gave the CF3-containing heterocyclic compounds bearing three contiguous stereogenic centers in excellent yields, diastereoselectivities, and enantioselectivities.