Access to [4,3,1]-Bridged Carbocycles via Rhodium(III)-Catalyzed C–H Activation of 2-Arylindoles and Annulation with Quinone Monoacetals
作者:Guangfan Zheng、Xujing Duan、Lu Chen、Jiaqiong Sun、Shuailei Zhai、Xiaojiao Li、Jierui Jing、Xingwei Li
DOI:10.1021/acs.joc.0c00018
日期:2020.3.20
Reported herein is the Rh(III)-catalyzed annulation of N-unprotected 2-arylindoles with quinone monoacetals for the straightforward synthesis of [4,3,1]-bridged carbocycles with exclusive C(3) selectivity. Mechanistic studies, particularly deuterium-labeling experiments, suggest that the coupling likely proceeds via two-fold C-H activation with two-fold migratory insertion into the enone moieties.
本文报道的是Rh(III)催化的N-未保护的2-芳基吲哚与醌单缩醛的环化反应,可直接合成具有独有的C(3)选择性的[4,3,1]桥联碳环。机理研究,特别是氘标记实验表明,这种偶联可能是通过两倍的CH活化和两倍的迁移性插入烯酮部分而进行的。