Gao Jinwei, Li Liuyi, Cui Caiyan, Ziaee Muhammad Asad, Gong Yaqiong, Sa Rongjian, Zhong Hong
College of Science, North University of China Taiyuan Shanxi 030051 P. R. China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou Fujian 350002 China
RSC Adv. 2019 Apr 29;9(23):13122-13127. doi: 10.1039/c8ra10475a. eCollection 2019 Apr 25.
The synthesis of five-membered cyclic carbonates catalytic cycloaddition reaction of CO with epoxides is considered to be an effective technology for alleviation of the energy crisis and global warming. Various commercial organic bases and ionic salts were used as catalysts, while the relationship of catalytic activity and compound structure has been seldom explored. Herein, a facilely obtained binary catalytic system based on triethylamine/NBuBr was developed for CO activation and chemical fixation. The highly efficient catalytic system showed outstanding conversion and above 99% selectivity under metal-free mild reaction conditions (100 °C, 1 atm) in one hour. The detailed process of CO activation and chemical fixation was investigated at the molecular level by a series of experiments and theoretical calculation, which provided a mode for the design and synthesis of a highly efficient catalytic system for conversion of CO under mild conditions.
二氧化碳与环氧化合物催化环加成反应合成五元环状碳酸酯被认为是缓解能源危机和全球变暖的有效技术。各种商业有机碱和离子盐被用作催化剂，然而催化活性与化合物结构之间的关系却鲜有探索。在此，开发了一种基于三乙胺/溴化正丁基铵的简便二元催化体系用于二氧化碳的活化和化学固定。该高效催化体系在无金属温和反应条件（100℃，1个大气压）下一小时内表现出优异的转化率和99%以上的选择性。通过一系列实验和理论计算在分子水平上研究了二氧化碳活化和化学固定的详细过程，为温和条件下二氧化碳转化的高效催化体系的设计和合成提供了一种模式。
