Dianion Approach to Chiral Cyclopropene Carboxylic Acids
作者:Lian-an Liao、Ni Yan、Joseph M. Fox
DOI:10.1021/ol047837+
日期:2004.12.1
[reaction: see text] In this Letter, we describe a general method for preparing the dianions of cyclopropene carboxylic acids, and we show that their subsequent reactions with electrophiles provide a general means for selectively introducing diverse types of functional groups. This provides a general method for the synthesis of chiral 1,2-disubstituted cyclopropenes, and opens new avenues for the enantioselective