C–H Activation Relay (CHAR): An Efficient Construction of Isatin Skeleton by Aerobic Oxidation of Glycine Esters

Directed by the strategy of C–H activation relay (CHAR), an efficient construction of isatin skeleton was developed through catalytic oxidation of glycine esters. The mechanistic study reveals that the oxidation of the relatively active C–H bonds initiated the followed activation of remote and inert C–H bonds, and an intramolecular 1,6-hydrogen shift was involved as a key step.