Copper-Catalyzed C(sp2)–H Amidationwith Azides as Amino Sources.

A copper-catalyzed C–H amidationprocess, with azides as amino sources under oxidant-free conditions,has been developed. When N-heterocycles were employedas directing groups, sulfonylazide and benzoylazide could be usedas amidating reagents to provide corresponding N-arylamides.When amidines or imine were used, tandem C–N/N–N bondformation occurred to afford indazole derivatives in one pot. [ABSTRACT FROM AUTHOR]