Cooperative Catalysis of Cyclic Carbonate Ring Opening: Application Towards Non-Isocyanate Polyurethane Materials
作者:Vince M. Lombardo、Elizabeth A. Dhulst、Emily K. Leitsch、Nathan Wilmot、William H. Heath、Anthony P. Gies、Matthew D. Miller、John M. Torkelson、Karl A. Scheidt
DOI:10.1002/ejoc.201500313
日期:2015.5
The reaction between cyclic carbonates and amines to produce hydroxyurethanes is an important alternative to current urethane chemistry. In order to address the issue of slow reaction rates, an efficient ring opening of cyclic carbonates with amines has been achieved utilizing cooperative catalysis. A new Lewis acid/Lewis base combination substantially decreases the reaction times for small molecule
环状碳酸酯和胺之间生成羟基氨基甲酸酯的反应是当前氨基甲酸酯化学的重要替代方法。为了解决反应速度慢的问题,利用协同催化实现了环状碳酸酯与胺的有效开环。新的路易斯酸/路易斯碱组合大大减少了小分子系统达到完全转化的反应时间。尽管三氮杂双环癸烯 (TBD) 对反应速率有重大影响,但添加三氟甲磺酸锂 (LiOTf) 作为助催化剂可以实现当前文献中报道的最快开环。