Salen Promoted Enantioselective Nazarov Cyclizations of Activated and Unactivated Dienones
作者:Gerri E. Hutson、Yunus E. Türkmen、Viresh H. Rawal
DOI:10.1021/ja401908m
日期:2013.4.3
A novel class of chiral 5,5'-di(2,4,6-trialkyl)-aryl salen-metal complexes have been developed and shown to catalyze highly enantioselective Nazarov cyclization reactions, giving rise to cyclopentenoids in 90:10-98:2 er. Significantly, the catalysts also promote, for the first time, highly enantioselective Nazarov reactions of "unactivated" dienones, producing hydrindenone products having in place three contiguous chiral centers.