Organocatalytic diastereo- and enantioselective sulfa-Michael addition to α,β-disubstituted nitroalkenes
作者:Qing-Lan Pei、Wen-Yong Han、Zhi-Jun Wu、Xiao-Mei Zhang、Wei-Cheng Yuan
DOI:10.1016/j.tet.2013.04.125
日期:2013.7
of α,β-disubstituted nitroalkenes with bifunctional organocatalyst has been developed. The expected adducts could be obtained in high yields with reasonable diastereo- and enantioselectivities. This process provides an easy access to synthetically useful chiral 1,2-aminothiol derivatives bearing two vicinal stereocenters. Importantly, current work represents the first example about the catalytic asymmetric
已经开发出用双官能有机催化剂将各种S-亲核体有效地不对称磺胺-迈克尔加成到一系列α,β-二取代的硝基烯烃中。可以以合理的非对映和对映选择性高收率获得预期的加合物。该方法提供了容易获得具有两个邻位立体中心的合成上有用的手性1,2-氨基硫醇衍生物的途径。重要的是,当前的工作代表了关于将除了硫代乙酸以外的各种S-亲核试剂催化不对称迈克尔加成到反应性较低的α,β-二取代的硝基烯烃上的第一个例子。