Direct Carbon−Carbon Bond Formation via Reductive Soft Enolization: A Kinetically Controlled <i>syn</i>-Aldol Addition of α-Halo Thioesters and Enolizable Aldehydes
作者:Scott J. Sauer、Michelle R. Garnsey、Don M. Coltart
DOI:10.1021/ja1057407
日期:2010.10.13
The direct addition of enolizable aldehydes and alpha-halo thioesters to produce beta-hydroxy thioesters enabled by reductive soft enolization is reported. The transformation is operationally simple and efficient and has the unusual feature of giving high syn-selectivity, which is the opposite of that produced for (thio)esters under conventional conditions. Moreover, excellent diastereoselectivity results when a chiral nonracemic alpha-hydroxy aldehyde derivative is used.