Copper(II)-Catalyzed Aerobic Oxidative Coupling between Chalcone and 2-Aminopyridine<i>via</i>CH Amination: An Expedient Synthesis of 3-Aroylimidazo[1,2-<i>a</i>]pyridines
A simple and efficient protocol has been developed for the synthesis of 3‐aroylimidazopyridines via copper(II) acetate‐catalyzed aerobic oxidative amination. A library of 3‐aroylimidazopyridines was synthesized from readily accessible chalcones and 2‐aminopyridines with high yields and regioselectivity. The reaction proceeds through a tandemMichael addition followed by an intramolecular oxidative