Highly Diastereo- and Enantioselective Catalytic Domino Thia-Michael/Aldol Reactions: Synthesis of Benzothiopyrans with Three Contiguous Stereocenters
作者:Gui-Ling Zhao、Jan Vesely、Ramon Rios、Ismail Ibrahem、Henrik Sundén、Armando Córdova
DOI:10.1002/adsc.200700407
日期:2008.1.25
Highly enantioselective organocatalytic domino thia-Michael/aldol reactions between 2-mercaptoacetophenone and α,β-unsaturated aldehydes are presented. The reactions proceed with excellent chemo-, diastereo- and enantioselectivity to give the corresponding benzothiopyran derivatives in high yields with up to >15:1 dr and 96 to >99 % ee.
提出了2-巯基苯乙酮与α,β-不饱和醛之间的高度对映选择性的有机催化多米诺-迈克尔/羟醛反应。反应以优异的化学,非对映体和对映体选择性进行,以高产率得到相应的苯并噻喃并衍生物,其高达> 15:1 dr和96至> 99%ee。