Electrooxidative iridium-catalyzed sp2 C−H activation-annulation leading to cationic π-extended heteroaromatics

An electrochemically driven, Cp*Ir( iii )-catalyzed method for alkenyl and aromatic C(sp 2 )–H activation and coupling with alkynes for the synthesis of biologically useful quaternary ammonium salts under mild conditions is demonstrated.