Enantioselective Chloro-<i>O</i>-cyclization of Unsaturated<i>N</i>-Tosylcarbamates
作者:Hui Yang、Guo-Tao Fan、Ling Zhou、Jie Chen
DOI:10.1002/adsc.201601328
日期:2017.4.17
An enantioselective chloro‐O‐cyclization of unsaturated N‐tosylcarbamates has been developed for the first time using a Cinchona‐derived quaternary ammonium salt as the catalyst, the desired enantioenriched chloromethyldioxolanimines were prepared with excellent regioselectivities and high enantioselectivities.
不饱和N-甲苯磺基氨基甲酸酯的对映选择性氯-O-环化反应是首次使用金鸡纳衍生的季铵盐作为催化剂开发的,制备了所需的对映体富集的氯甲基二氧杂苯胺,具有良好的区域选择性和高对映选择性。