Palladium-Catalyzed Carbonylation of Amines: Switchable Approaches to Carbamates and N,N'-Disubstituted Ureas

Switchable access to carbamates and ureas has been developed by solvent control palladium-catalyzed carbonylation of aromatic amines under an atmosphere of carbon monoxide. A variety of N-phenylcarbamates and N,N'-diphenylureas was easily synthesized in good to excellent yields from readily available aromatic amines under mild conditions.