Enantioselective Organocatalytic Michael Addition of Ketones to Alkylidene Malonates
作者:Siang-En Syu、Chan-Hui Huang、Ko-Wei Chen、Chia-Jui Lee、Utpal Das、Yeong-Jiunn Jang、Wenwei Lin
DOI:10.1002/chir.22055
日期:2012.8
studied for the direct asymmetric Michaeladdition of ketones and alkylidenemalonates. The organocatalyst (S)‐2‐((naphthalen‐2‐ylthio)methyl)pyrrolidine, bearing a pyrrolidine and a sulfide moiety, showed a very high catalytic activity in the absence of additives. The reaction condition is mild, and the Michael adducts were obtained in very good enantioselectivities (up to 96%), diastereoselectivities