An Efficient Direct Access to Carbamates from Alcohols and TosMIC Mediated by Iodine in DMSO

A new approach for the synthesis of carbamates from alcohols and TosMIC promoted by iodine/DMSO system is reported. This method offers a one-step, direct and practical strategy for the rapid construction of carbamates under mild conditions. The reaction proceeds via sequential oxidation of isocyanide to isocyanate and nucleo­philic addition of alcohols to isocyanate to afford the carbamates in high yields.