Copper‐Catalyzed Direct Carbamoylation of Quinoxalin‐2(1H)‐ones with Hydrazinecarboxamides Under Mild Conditions

A direct C–H bond carbamoylation of quinoxalin‐2(1H)‐ones with hydrazinecarboxamides has been developed. This reaction provides a series of 3‐carbamoylquinoxalin‐2(1H)‐one derivatives in moderate to good yields under mild conditions with a broad range of substrates and functional group tolerance. The present methodology affords a convenient and practical access to pharmaceutically active 3‐carbamoylquinoxalin‐2(1H)‐one derivatives.