Palladium-Catalyzed Direct C-H Bond Alkynylations of Heteroarenes Using gem-Dichloroalkenes

Palladium-catalyzed direct alkynylations of heteroarenes were accomplished with inexpensive gem-dichloroalkenes as user-friendly electrophiles, which set the stage for a modular, step-economical synthesis of diversely decorated heteroaryl alkynes with ample scope.