Copper-Catalyzed Oxidative C−H Amination: Synthesis of Imidazo[1,2-a]-N-Heterocycles from N-Heteroaryl Enaminones The open-air reaction conditions were general and successfully applied in the synthesis of heterocycles, such as substituted imidazo[1,2-a]pyridines, ... KR Reddy,AS Reddy,R Shan...