作者:Xiuxiu Li、Cai You、Jiaxin Yang、Shuailong Li、Dequan Zhang、Hui Lv、Xumu Zhang
DOI:10.1002/anie.201906111
日期:2019.8.5
A general and efficient rhodium‐catalyzed asymmetric cyanide‐free hydrocyanation of alkenes has been developed. Based on the asymmetric hydroformylation/condensation/aza‐Cope elimination sequences, a broad scope of substrates including mono‐substituted, 1,2‐, and 1,1‐disubstituted alkenes (involving natural product R‐ and S‐limonene) were employed, and a series of valuable chiral nitriles are prepared
已经开发了一种通用且有效的烯烃铑催化的不对称无氰氢氰化方法。根据不对称的加氢甲酰化/缩合/氮杂-Cope消除顺序,使用了广泛的底物,包括单取代的,1,2-和1,1-二取代的烯烃(涉及天然产物R-和S-柠檬烯),制备了一系列有价值的手性腈,具有高收率(高达95%)和对映选择性(高达98% ee)。值得注意的是,实现高对映异构率的关键因素是添加催化量的苯甲酸。这种新颖的方法为维达列汀和Anagliptin的中间体提供了一种有效而简洁的合成途径。