α,α-Disubstituted Boron Enolates in the Asymmetric Synthesis of Quaternary Carbon Centers
作者:E. Diane Burke、James L. Gleason
DOI:10.1021/ol0364428
日期:2004.2.1
[reaction: see text] Reduction of alpha,alpha-disubstituted thioglycolate amides with lithium di-tert-butylbiphenylide affords alpha,alpha-disubstituted enolates with high Z/E selectivity. Transmetalation of the enolates with dicyclohexylboron bromide facilitates highly diastereoselective aldol reaction with aromatic and alpha,beta-unsaturated aldehydes.