Asymmetric Synthesis of Trisubstituted Tetrahydrothiophenes Bearing a Quaternary Stereocenter via Double Michael Reaction Involving Dynamic Kinetic Resolution
作者:Sara Meninno、Gianluca Croce、Alessandra Lattanzi
DOI:10.1021/ol4014975
日期:2013.7.5
The stereoselective synthesis of highly functionalized tetrahydrothiophenes bearing three contiguous stereocenters, one of them quaternary, can be achieved by reacting trans-α-cyano-α,β-unsaturated ketones and trans-tert-butyl 4-mercapto-2-butenoate in the presence of a readily available amine thiourea. The products are obtained in high yield, good diastereoselectivity, and excellent enantioselectivity
可以通过在存在下使反式-α-氰基-α,β-不饱和酮与反式-叔丁基4-巯基-2-丁烯酸酯反应,来实现带有三个连续的立体中心的高官能化四氢噻吩的立体选择性合成。一种现成的胺硫脲。以高收率,良好的非对映选择性和优异的对映选择性获得产物。四氢噻吩的整体形成是通过级联双迈克尔反应进行的,该反应涉及动态动力学拆分的高效过程。