Coupling reaction of epoxide and carbon dioxide catalysed by alkali metal salts in the presence of ß-cyclodextrin derivatives
Abstract
Purpose
This study aims to investigate the coupling reaction of epoxide and CO2 catalysed by alkali metal salts in the presence of ß-cyclodextrin (ß-CD) derivatives to generate cyclic carbonates at various conditions.
Design/methodology/approach
The coupling reaction was catalysed by alkali metal salts. The effects of the co-catalysts were investigated by using the conversion rate of raw materials. The affecting factors, such as reaction temperature, amount of the co-catalyst and reaction time, were explored. The possible mechanism of the coupling reaction was discussed.
Findings
Results showed that the structure of ß-CD is an important factor influencing the catalytic activity for the coupling reaction of epoxide with CO2. The catalytic system of 2,3,6-trimethyl-ß-CD with potassium iodide (KI) showed a high catalytic activity. The protocol was expanded to various epoxides, which provided the corresponding cyclic carbonates in excellent yields. The apparent decrease in the yields was not detected after four recycling times. Moreover, the mechanism for the synergetic effect of the catalyst was proposed.
Originality/value
The coupling reactions were achieved in the presence of different structure of ß-CD as co-catalysts. The affecting of substituent of ß-CD were investigated.
Keywords
Acknowledgements
This work was supported by Science and Technology Foundation of Universities of Hebei Province (Grant no: ZD2015113), Science Foundation of Hebei Province (Grant no: B2015402066, B2016402030) and the National Natural Science Foundation of China (Grant no: 21403051).
Citation
Guangqing, Z., Qin, S., Zhen, L., Haiyan, H., Hui, L. and Chang, T. (2017), "Coupling reaction of epoxide and carbon dioxide catalysed by alkali metal salts in the presence of ß-cyclodextrin derivatives", World Journal of Engineering, Vol. 14 No. 2, pp. 159-164. https://doi.org/10.1108/WJE-12-2016-0172
Publisher
:Emerald Publishing Limited
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