Highly efficient copper-catalyzed direct C–H amidation of quinoxalin-2(1H)-ones with amidates under microwave irradiation

A novel and highly efficient copper-catalyzed direct oxidative amidation of quinoxalin-2(1H)-ones with a variety of aromatic and aliphatic amides was described. This methodology provided a practical approach to various 3-acylamino quinoxalin-2(1H)-ones from readily available starting materials in good to excellent yields.