Methylene-Bridged Bis(imidazoline)-Derived 2-Oxopyrimidinium Salts as Catalysts for Asymmetric Michael Reactions
作者:Andrey E. Sheshenev、Ekaterina V. Boltukhina、Andrew J. P. White、King Kuok Mimi Hii
DOI:10.1002/anie.201300614
日期:2013.7.1
In nothing flat: The title salts, having planar nitrogen centers, were utilized successfully as phase‐transfer catalysts for asymmetric Michael reactions of tert‐butyl glycinate benzophenone Schiff base with vinyl ketone and chalcone derivatives, thus providing excellent levels of diastereo‐ and enantiocontrol (see scheme).
一言以蔽之:具有平面氮中心的标题盐被成功地用作甘氨酸叔丁酯二苯甲酮席夫碱与乙烯基酮和查尔酮衍生物的不对称迈克尔反应的相转移催化剂,从而提供了极好的非对映和对映控制水平(见方案)。