Hydroamination and Hydrophosphination of Isocyanates/Isothiocyanates under Catalyst‐Free Conditions

Abstract Symmetrical and unsymmetrical N , N’ ‐disubstituted as well as trisubstituted ureas/thioureas by the hydroamination of isocyanates/isothiocyanates, and various phosphathioureas by the hydrophosphination of isothiocyanates have been synthesized in good to excellent yields under catalyst‐free and mild conditions. This protocol is also applicable for the efficient synthesis of chiral ureas and thioureas and common herbicides, such as fenuron and monuron.