A mild and improved procedure is reported for the synthesis of cyanamides from the corresponding dithiocarbamic acid salts via a desulfurization strategy using phase transfer reagent ethyltriphenylphosphonium tribromide (ETPPTB) and sodium bicarbonate in water / ethyl acetate biphasic medium. This method is highly appealing because of its one-pot process, convenient operation, environmental friendly, mild reaction conditions and broad substrate scope.