Copper-Catalyzed Intramolecular Oxidative C-H Functionalization and C-N Formation of 2-Aminobenzophenones: Unusual Pseudo-1,2-Shift of the Substituent on the Aryl Ring

A good move: A copper-catalyzed intramolecular oxidative C H functionalization of 2-aminobenzophenone affords two regioisomeric acridones (see scheme). The reaction involves an unusual pseudo-1,2-migration of R-2 group(s) on the arene ring (bpy=2,2'-bipyridine, DMAc=dimethylacetimide).