An efficient one-pot synthesis of N,N′-disubstituted ureas and carbamates from N-acylbenzotriazoles

A facile and high-yielding one-pot synthesis of carbamates and N , N ′-disubstituted symmetrical ureas from N -acylbenzotriazoles has been devised. It is believed that, the intermediate acyl-azide undergo Curtius rearrangement and in different solvents gives different products i.e. carbamates in alcohols and N , N ′-disubstituted symmetrical urea in THF.