本发明公开了一种多氨基甲酸酯的制备方法。具体的讲，采用离子液体为催化剂，多胺与碳酸二甲酯通过催化制相应多氨基甲酸酯的方法。本发明催化剂简单，除离 子液体外不加入其它溶剂和催化剂；产品以晶体形式析出，分离简单、纯度高；离子液体可以循环使用，属于环境友好的生产过程；反应所需条件简单，易于工业化 生产；反应时间短，反应在常压下进行，操作安全。

邓友全,周瀚成,石峰,等. 一种多氨基甲酸酯的制备方法. Cn1778793. 2007.

Selective synthesis of carbamates from amines and dimethyl carbonate were studied in the presence of various ionic liquids as catalysts. The –SO3H-functionalized ionic liquid was found to be the most active catalyst among the applied ionic liquids, and nearly 100% conversion and 95% selectivity were achieved when using 1,6-hexanediamine as reactant. The acid functional ionic liquid catalyst system is also readily separable and reusable after reaction.

Keywords: Green chemistry; Ionic liquid; Carbamates; Amine; Non-phosgene

★★★☆☆ Zhou HC,Shi F,Tian X,et al. Synthesis Of Carbamates From Aliphatic Amines And Dimethyl Carbonate Catalyzed By Acid Functional Ionic Liquids[J]. Journal Of Molecular Catalysis A: Chemical,2007,271:89-92.