Copper(I) bromide catalyzed arylation of cyclic enamides and naphthyl-1-acetamides using diaryliodonium salts

Copper(I) bromide catalyzed direct C-H arylation of cyclic enamides was achieved using diaryliodonium salts in the absence of base/additive at ambient temperature with high yields. A biologically active dihydro[a]benzocarbazole scaffold was synthesized using the established protocol. The scope of the current methodology was further extended for the synthesis of C4-, C7-aryl-substituted 1-naphthyl acetamides in good yields.