Highly Enantioselective Organocatalytic Michael Addition Reactions of Ketones with Chalcones
作者:Jian Wang、Hao Li、Liansuo Zu、Wei Wang
DOI:10.1002/adsc.200505420
日期:2006.3
A highly enantioselective, organocatalyticMichaeladdition reaction of unmodified ketones with chalcones has been developed for the first time. The process, catalyzed by (S)-N-(pyrrolidin-2-ylmethyl)-trifluoromethanesulfonamide, affords 1,5-diketones in high yields (73–89%) and with high degrees of enantio- and diastereoselectivity (86–97% ee, >30 : 1 dr).