PROCESS FOR PREPARING N-(ARYLSULPHONYL)-CARBAMIDE ACID DERIVATES AND INTERMEDIATES USEFUL FOR CARRYING OUT THIS PROCESS

摘要

An improved process is disclosed for preparing known N-(arylsulphonyl)-carbamic acid derivates (carbamide, carbamate and thiocarbamate) having the formula (I), in which Ar can be an aryl group, Z can be N, S or O and R<4> and R<5> can be different aliphatic, cycloaliphatic or aromatic groups. To produce these compounds, arlsulphonylimines having the general formula (II): ArSO2N=XR<1>R<2>R<3>, in which R<1>, R<2> et R<3>, independently from each other, designate C1-12-alkyl, cyclohexyl, optionally substituted benzyl, phenyl or naphthyl; and X stands for an atom of phosphorus, arsenic, antimony, sulphur, selenium, tellurium or iodine, are catalytically carbonylated with CO and the resulting arylsulphonyl isocyanate having the formula (III): ArSO2NCO is reacted during or after carbonylation with compounds having the general formula (IV): R<4>R<5>ZH.