N-Trimethylsilyloxyenamines as new aldehyde enolate synthons: general, efficient and diastereoselective aldol reaction with ketals and acetals
作者:Manoj R. Sonawane、Ivana Císařová、Ilya M. Lyapkalo
DOI:10.1039/b924880c
日期:——
(E)-N-Trimethylsilyloxyenamines, easily accessible from aldonitrones, proved to be excellent nucleophiles in TMSOTf-induced diastereoselective aldol reaction, both with ketals and acetals, proceeding via an extended transition state and leading to a new aldol C–C-bond in the aldonitrone products, that can be readily hydrolysed to the corresponding aldehydes.