Regioselective C−H Functionalization Directed by a Removable Carboxyl Group:  Palladium-Catalyzed Vinylation at the Unusual Position of Indole and Related Heteroaromatic Rings

Abstract

The palladium-catalyzed oxidative vinylation of indole-3-carboxylic acids with alkenes effectively proceeds via directed C-H functionalization and decarboxylation to produce the corresponding 2-vinylated indoles. Similarly, pyrrole-, furan-, and thiophenecarboxylic acids also undergo decarboxylative vinylation.