The present invention relates to a process for the preparation of an isocyanate compound comprising the steps of: a) Reacting an amine compound A having at least one primary amino group with CO2 and an organotin compound S having at least one radical OR3 attached to the tin atom of the organotin compound, wherein R3 is a C-bound organic radical having from 1 to 30 carbon atoms, wherein 1, 2 or 3 carbon atoms may be replaced by oxygen or nitrogen, to convert at least one of the primary amino groups in the amine compound A into a carbamate group, thereby obtaining a carbamate compound C; b) cleavage of the carbamate groups in the carbamate compound C obtained in step a) to form the isocyanate compound and an alcohol R3OH, without separation of the tin compound formed in step a); c) obtaining the isocyanate compound from the reaction mixture of step b).
                            本发明涉及一种用于制备
异氰酸酯化合物的方法,包括以下步骤:a)使至少含有一个伯
氨基的胺化合物A与
CO2和至少含有一个连接到
有机锡化合物
锡原子的自由基OR3的
有机锡化合物S反应,其中R3是一个具有1至30个碳原子的C-连接有机基团,其中1、2或3个碳原子可以被氧或氮替换,以将胺化合物A中的至少一个伯
氨基转化为
碳酸酯基团,从而获得
碳酸酯化合物C;b)在步骤a)中获得的
碳酸酯化合物C中的
碳酸酯基团裂解,形成
异氰酸酯化合物和醇R3OH,不分离步骤a)中形成的
锡化合物;c)从步骤b)的反应混合物中获得
异氰酸酯化合物。