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 Michael addition of ketones and alkylidene malonates. 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
研究了具有硫化物或砜功能(1a,1b,1c,1d)的有机催化剂对酮和亚烷基丙二酸酯的直接不对称迈克尔加成反应。带有吡咯烷和硫化物部分的有机催化剂(S)-2-((萘-2-基硫基)甲基)吡咯烷在没有添加剂的情况下显示出非常高的催化活性。反应条件温和,并且迈克尔加合物以非常好的对映选择性(高达96%),非对映选择性(高达95:5)和化学收率(高达95%)获得。手性24:600–605,2012。分级为4 +©2012 Wiley Periodicals,Inc.