Heteroaryldifluoromethylation of Organoborons Catalyzed by Palladium: Facile Access to Aryl(Heteroaryl)difluoromethanes

Abstract

A first example of Pd-catalyzed heteroaryldifluoromethylation of organoborons with bromodifluoromethylated heteroarenes has been described. The use of phosphine ligand PAd2(n-Bu)·HI is critical for the reaction efficiency. With use of this ligand, a wide range of aryl(heteroaryl)difluoromethanes were obtained with high efficiency. The notable features of this reaction are its broad substrate scope and excellent functional group compatibility, thus providing a facile protocol for application in drug discovery and development.