Method for preparing carbamate

Abstract

The invention relates to a method for preparing carbamate. The method for preparing the carbamate comprises the following processes of: dissolving carbonic ester, amine and acetate catalyst into a proper solvent so that the molar ratio of the carbonic diester to the amine is 2 to 20 times stoichiometric ratio and the molar ratio of the catalyst to the amine is 1:5-1:100; and then reacting for 0.5 to 16 hours at the temperature of between 30 and 160 DEG C, and performing separation and purification to obtain the required carbamate. The method has the main advantages that: the catalyst has stable chemical performance and low price; and the product separation and purification processes are simple.

Description

technical field

[0001] The present invention relates to a method for preparing carbamate. Background technique

[0002] Carbamate compounds have a wide range of uses and can be used as intermediates in pesticides, medicines, synthetic resin modification, and organic synthesis. As an intermediate in organic synthesis, it can be used to synthesize isocyanate, non-toxic polyurethane, dipolycyanamide derivatives, dialkyl carbonate and polyvinylamine, etc. Carbamate can be combined with unsaturated hydrocarbons, aldehydes, ketones, polyols and aromatic rings and other reactions to generate derivatives for various purposes, and can also be used to synthesize heterocyclic compounds such as pyrrole, triadimefon and quinimizolone, and has a good application prospect.

[0003] The traditional synthesis method mainly uses highly toxic phosgene as raw material, and obtains carbamate through alcoholysis and ammonolysis. In recent years, with the development of society, countries pay mo...