Highly regio- and diastereoselective halohydroxylation of olefins: a facile synthesis of vicinal halohydrins
作者:Jinglei Zhang、Jie Wang、Zhuibai Qiu、Yang Wang
DOI:10.1016/j.tet.2011.06.077
日期:2011.9
out under mild conditions in the presence of N-tosyl-l-threonine (NTsLT) as an acidic additive using chloramine T trihydrate, 1,3-dichloro-5,5-dimethylhydantoin (DCDMH) or N-bromoacetamide (AcNHBr) as the halogen source, respectively, affording the corresponding vicinal halohydrins in good to high yields with excellent regio- and stereoselectivities.
基于各种具有给电子或吸电子取代基的烯烃的直接卤代羟基化,已经开发了一种用于合成邻位氯醇或溴代醇衍生物的有效方法。该反应在温和条件下在的存在下进行Ñ甲苯磺酰升-苏氨酸(NTsLT)作为酸性添加剂使用氯胺-T三水合物,1,3-二氯-5,5-二甲基(DCDMH)或ñ -bromoacetamide( AcNHBr)作为卤素源,分别以高至高收率提供相应的邻位卤代醇,并具有出色的区域选择性和立体选择性。