The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivatized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.
本发明提供了形成
氨基甲酸酯、
脲和
异氰酸酯的方法。在某些实施例中,这些方法包括将胺与酯取代的二芳基
碳酸酯反应,形成活性
氨基甲酸酯,可以进一步衍生为非活性
氨基甲酸酯或
脲。
脲或
氨基甲酸酯可以经过热解反应形成
异氰酸酯。