Hydroxy acid-functionalized ionic liquids as green alternatives for the efficient catalytic conversion of epoxides to cyclic carbonates under solvent and co-catalyst-free conditions
作者:Shuang Yue、Hongliu Qu、Xinxin Song、Shuliang Zang、Guichun Deng
DOI:10.1039/d1cy01128f
日期:——
environmentally friendly synthesis route of cycliccarbonatesfromcarbondioxide and epoxide applying novel hydroxy acid-functionalized ionicliquids as efficient catalysts under solvent and co-catalyst-free conditions has been developed. These hydroxy acid-functionalized ionicliquids exhibit outstanding catalytic activity for the conversion of CO2 and various epoxides to cycliccarbonates. The effects of
开发了一种创新、高效、实验简单且环境友好的环状碳酸酯合成路线,在无溶剂和无助催化剂的条件下,应用新型羟基酸官能化离子液体作为有效催化剂。这些羟基酸官能化的离子液体在将 CO 2和各种环氧化物转化为环状碳酸酯方面表现出出色的催化活性。反应参数(催化剂用量、CO 2压力、反应时间和温度)对环氧氯丙烷与CO 2合成碳酸氯丙烯的催化活性的影响被检查和优化。催化剂可以重复使用至少七次,而没有任何明显的选择性和活性损失。活化能经测定为66.9 kJ mol -1。最后,提出了可能的反应机理。
The ionic liquid-bound quinuclidine catalyzed Baylis-Hillman reactions were investigated. The IL-supported catalyst showed equally good catalytic activity as compared with its nonimmobilized counterpart. The corresponding Baylis-Hillman adducts were obtained in moderate to high yields in all the cases tested. The IL-supported quinuclidine can be readily recovered and reused six times without significant loss of catalytic activity.