Synthesis of Functionalized Cyclic Carbonates by One-Pot Reactions of Carbon Dioxide, Epibromohydrin, and Phenols, Thiophenols, or Carboxylic Acids Catalyzed by Ionic Liquids
作者:Shi Wu、Yongya Zhang、Binshen Wang、Elnazeer H. M. Elageed、Liangzheng Ji、Haihong Wu、Guohua Gao
DOI:10.1002/ejoc.201601315
日期:2017.1.18
The one-pot reactions of CO2, epibromohydrin, and phenols, thiophenols, or carboxylic acids catalyzed by 1-butyl-3-[(3-hydroxyphenyl)methyl]imidazolium bromide were investigated. Three kinds of cyclic carbonates with ether, thioether, or ester groups were synthesized under mild reaction conditions in good-to-high yields. Reaction-mechanism studies indicated that the proton exchange between the alkoxide
研究了由 1-丁基-3-[(3-羟基苯基)甲基] 溴化咪唑鎓催化的 CO2、表溴醇和苯酚、苯硫酚或羧酸的一锅法反应。在温和的反应条件下以良好到高的收率合成了三种具有醚、硫醚或酯基团的环状碳酸酯。反应机理研究表明,表溴醇与 1-溴-3-苯氧基-2-丙醇的开环反应形成的醇盐之间的质子交换在该合成路线中起着至关重要的作用。催化剂1-丁基-3-[(3-羟基苯基)甲基]溴化咪唑鎓在反应过程中转化为相应的环状碳酸酯官能化离子液体。这种转化不影响其在反应中的催化性能。