Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates or substituted isocyanates by reaction of an adduct of isocyanic acid and a tertiary amine with a primary and secondary amine, an alcohol, a thiol or a compound having one or two non-cumulated olefinic double bonds, and a process for the preparation of N-mono- or N,N-disubstituted ureas by reaction of ammonium isocyanate with a primary or secondary amine in a diluent.
制备不对称取代的
脲、
氨基甲酸酯、
硫代
氨基甲酸酯或取代
异氰酸酯的过程,通过将异
氰酸和三级胺的加合物与一级和二级胺、醇、
硫醇或具有一个或两个非累积烯丙基双键的化合物反应。以及通过在稀释剂中将
氨基异
氰酸盐与一级或二级胺反应制备N-单取代或N,N-双取代
脲的过程。