PROCESS FOR MANUFACTURING N-ALK(EN)OXY (OR ARYLOXY)CARBONYL-ISOTHIOCYANATES AND ITS DERIVATIVES IN THE PRESENCE OF N,N-DIALKYLARYLAMINE CATALYST

摘要

The present invention provides a process for making N-alk(en)oxy(or aryloxy)carbonyl isothiocyanate derivatives by reacting a haloformate with a thiocyanate, in the presence of an aqueous solvent or an organic solvent and a catalytic amount of a N,N-dialk(en)ylarylamine, to produce a N-alkoxy (or aryloxy)carbonyl isothiocyanate intermediate product, wherein the intermediate product is converted to a N-alk(en)oxy(or aryloxy)carbonyl isothiocyanate derivative in high yield and purity. The invention further provides a process for making N-alk(en)oxy (or aryloxy)carbonyl isothiocyanates by reacting a haloformate with a thiocyanate, in the presence of an aqueous solvent or an organic solvent and a catalytic amount of a N,N-dialk(en)ylarylamine.