Platinum-Catalyzed Michael Addition and Cyclization of Tertiary Amines with Nitroolefins by Dehydrogenation of α,β-sp<sup>3</sup> C−H Bonds
作者:Xiao-Feng Xia、Xing-Zhong Shu、Ke-Gong Ji、Yan-Fang Yang、Ali Shaukat、Xue-Yuan Liu、Yong-Min Liang
DOI:10.1021/jo100133z
日期:2010.5.7
A mild platinum-catalyzed oxidative dehydrogenation of α,β-C(sp3)−H bonds of tertiary amines in the presence of ambient oxygen is revealed, and the in situ formed enamines subsequently reacting with various nitroolefins resulted in the development of two one-pot synthetic protocols involving Michael addition−elimination and Michael addition−cyclization. By using different functionalized nitroolefins
揭示了在环境氧存在下温和的铂催化叔胺的α,β-C(sp 3)-H键的氧化脱氢,随后原位形成的烯胺与各种硝基烯烃反应导致形成两个锅合成协议,涉及迈克尔加成消除和迈克尔加成环化。通过使用与当前氧化条件相容的不同官能化硝基烯烃,可以方便地分别获得两种结构上不同的产物,即三取代的烯胺和发色[2,3- b ]哌啶。