Cobalt-Mediated, Enantioselective Synthesis of <i>C</i><sub>2</sub> and <i>C</i><sub>1</sub> Dienes
作者:W. Christopher Boyd、Mark R. Crimmin、Lauren E. Rosebrugh、Jennifer M. Schomaker、Robert G. Bergman、F. Dean Toste
DOI:10.1021/ja107968c
日期:2010.11.24
novel base mixture derived from enantiopure ammonium salts and NaHMDS was used as a source of chirality, and this enantioselective desymmetrization of C(s) alkenes has been applied to the asymmetric synthesis of C(2)- and C(1)-symmetric diene ligands in high regioselectivity (3.7-20:1 anti/syn), near perfect diastereoselectivity (>99:1 dr), and high enantioselectivity (90-96% ee).