Direct oxidative carboxylation of styrene to styrene carbonate in the presence of ionic liquids
Direct oxidative carboxylation of styrene to styrene carbonate in the presence of ionic liquids
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DOI：
10.1016/j.catcom.2003.11.016
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发表时间：
2004-02
影响因子：
3.7
通讯作者：
Jianmin Sun;S. Fujita;B. Bhanage;M. Arai
中科院分区：
文献类型：
--
作者：
Jianmin Sun;S. Fujita;B. Bhanage;M. Arai
在离子液体存在下，以苯乙烯和压缩CO2为原料，通过环氧化和环加成两步反应耦合，一锅法合成了苯乙烯碳酸酯。离子液体的结构和阴离子的亲核性强烈影响苯乙烯碳酸酯的生成，四丁基溴化铵（TBAB）是最有效的催化剂。其他反应参数，如CO2压力，反应温度，时间，和TBAB浓度也进行了研究，并提出了一个合理的反应机理。
Styrene carbonate is synthesized by a direct benign route from styrene and compressed CO2in the presence of ionic liquid, in which two sequential reactions of epoxidation and cycloaddition are coupled for a one-pot synthesis. The structure of ionic liquids and the nucleophilicity of anions strongly affect the yield of styrene carbonate formed and tetrabutylammonium bromide (TBAB) is the most effective catalyst. Other reaction parameters such as CO2pressure, reaction temperature, time, and TBAB concentration have also been investigated and a plausible reaction mechanism is proposed.