Chlorine, an atom economical auxiliary for asymmetric aldol reactions
作者:Shira D. Halperin、Robert Britton
DOI:10.1039/c3ob27462d
日期:——
An auxiliary strategy has been developed for asymmetricreactions of aldehydes in which the auxiliary itself is not chiral, but a single chlorine atom introduced via organocatalytic α-chlorination. The stereodirecting influence of the chlorine atom is then exploited prior to its removal by radical reduction. This strategy is demonstrated in the synthesis of several aldols (92–99% ee) and the natural