Enantioselective Synthesis of Unsymmetrical Triarylmethanes by Chiral Brønsted Acids
作者:Feng-Lai Sun、Xiao-Jian Zheng、Qing Gu、Qing-Li He、Shu-Li You
DOI:10.1002/ejoc.200901164
日期:2010.1
Chiral Bronsted acid catalyzed Friedel-Crafts alkylation of electron-rich arenes with (3-indolyl)methanamines has been realized to provide an efficient synthesis of enantioenriched unsymmetricaltriarylmethanes. With 5 mol-% of a newly developed chiral phosphoric acid, the enantioenriched unsymmetricaltriarylmethanes were obtained in excellent yields with up to 91 % ee.
手性布朗斯台德酸催化富电子芳烃与(3-吲哚基)甲胺的弗瑞德-克来福特烷基化已被实现,以提供对映体富集的不对称三芳基甲烷的有效合成。使用 5 mol-% 的新开发的手性磷酸,以高达 91% ee 的优异收率获得对映体富集的不对称三芳基甲烷。