Synthesis of Sulfur-Substituted α-Stereogenic Amides and Ketones: Highly Enantioselective Sulfa-Michael Additions of 1,4-Dicarbonylbut-2-enes
作者:Fangli Zhao、Wen Zhang、Yuanyong Yang、Yuanhang Pan、Wenchao Chen、Hongjun Liu、Lin Yan、Choon-Hong Tan、Zhiyong Jiang
DOI:10.1002/adsc.201100227
日期:2011.10
Conjugate addition to 1,4-dicarbonylbut-2-enes will generate an α-stereogenic center with respect to one of the carbonyl groups, which informally, can be considered as an inversion of normal reactivity patterns or umpolung protocol. In this paper, the addition of tert-butyl mercaptan to 1,4-dicarbonylbut-2-enes including (E)-4-oxo-4-arylbutenamides and (E)-4-oxo-4-arylbutenones has been developed,
与1,4-二羰基丁-2-烯共轭加成将产生一个相对于羰基基团的α-立体异构中心,非正式地,该中心可被认为是正常反应性模式或质谱协议的颠倒。在本文中,已经开发了叔丁基硫醇到包括(E)-4-氧代-4-芳基丁烯酰胺和(E)-4-氧代-4-芳基丁烯酮在内的1,4-二羰基丁-2-烯中,以高区域选择性和对映选择性(最高ee高达98%)合成了一系列手性硫取代的α-立体异构酰胺和酮。