Salen Promoted Enantioselective Nazarov Cyclizations of Activated and Unactivated Dienones
摘要:
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.
Salen Promoted Enantioselective Nazarov Cyclizations of Activated and Unactivated Dienones
摘要:
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.