Regio- and Enantioselective Friedel–Crafts Benzhydrylation of Indoles in Carbocyclic Ring with <i>ortho</i>-Quinomethanes: Access to Chiral Diarylindolylmethanes
作者:Ming-Ming Chu、Xue-Yang Chen、Yi-Feng Wang、Suo-Suo Qi、Zhen-Hui Jiang、Dan-Qian Xu、Zhen-Yuan Xu
DOI:10.1021/acs.joc.9b03479
日期:2020.8.7
The functionalization of indoles in the carbocyclic ring has been achieved via organocatalytic enantioselective Friedel–Crafts benzhydrylation of hydroxyindoles with in situ generated ortho-quinomethanes in oil–water biphases, allowing an efficient access to varied diarylindolylmethanes with a wide substrate scope. The high yields, excellent stereoselectivities, mild conditions, low catalyst loading
碳环中吲哚的功能化是通过油水两相中羟基吲哚与原位生成的邻喹啉甲烷的有机催化对映选择性Friedel-Crafts苯甲酰化而实现的,从而可以有效地获得具有广泛底物范围的各种二芳基吲哚甲烷。高产率,优异的立体选择性,温和的条件,较低的催化剂负载量和易于扩展的性能也证明了这种新颖方法的兴趣。