A process is disclosed for producing substituted asymmetric ureas, starting from dialkylcarbonates, aromatic amines and aliphatic amines, by a two-step procedure and in the presence of a catalyst selected from among the Lewis' acids and the alkoxides or the hydroxides of alkali metals or alkaline earth metals.
本发明公开了一种以二烷基
碳酸酯、芳香胺和脂肪胺为原料,在从
路易斯酸和碱
金属或碱土
金属的烷氧基化物或氢氧化物中选出的催化剂存在下,通过两步法生产取代的不对称
脲的工艺。