Lewis Base Catalyzed Aldol Additions of Chiral Trichlorosilyl Enolates and Silyl Enol Ethers
作者:Scott E. Denmark、Shinji Fujimori、Son M. Pham
DOI:10.1021/jo051930+
日期:2005.12.1
diastereodifferentiation in chiral Lewis base catalyzed aldoladditions using chiral enoxysilanes derived from lactate, 3-hydroxyisobutyrate, and 3-hydroxybutyrate have been investigated. Trichlorosilylenolates derived from the chiral methyl and ethyl ketones were subjected to aldolization in the presence of phosphoramides, and the intrinsic selectivity of these enolates and the external stereoinduction