PRODUCTION OF ALIPHATIC O-ARYLURETHANE

PURPOSE:To obtain the subject compound by reacting a carbamic acid O-aryl ester or a mixture of the compound and urea with an aliphatic primary amine as raw materials in the presence of an aromatic hydroxyl compound while eliminating ammonia as the by-product. CONSTITUTION:A carbamic acid O-aryl ester shown by formula II or a mixture of urea containing >=1wt.% carbamic acid O-aryl ester is reacted with an aliphatic primary amine as raw materials in the presence of an aromatic hydroxyl compound shown by formula I (Ar is aromatic group) in a solvent such as pentane at 160-280 deg.C, especially 200-250 deg.C. In the operation, the reaction is carried out while eliminating ammonia as a by-product from the reaction system so that the ammonia concentration in the reaction solution is made