Rhodium‐Catalyzed Enantioselective Oxidative [3+2] Annulation of Arenes and Azabicyclic Olefins through Twofold C−H Activation
作者:Ruijie Mi、Guangfan Zheng、Zisong Qi、Xingwei Li
DOI:10.1002/anie.201911086
日期:2019.12.2
mostly limited to ortho selectivity. Activation of both ortho and meta C-H bonds constitutes a particularly important strategy for annulation, but has rarely been studied in enantioselective systems. Reported herein is rhodium(III)-catalyzed asymmetric [3+2] transannulation of arenes with 7-azabenzonorbornadienes. Two distinct classes of arenes have been identified as substrates, and the coupling proceeded
activation of secondaryamides in the presence of alkynes. An unusual mechanistic detour leading to pyridine derivatives as products is also presented and briefly discussed. In this article we describe the straightforward synthesis of polysubstituted pyrimidines by electrophilic activation of secondaryamides in the presence of alkynes. An unusual mechanistic detour leading to pyridine derivatives as products