Zinc-Accelerated Cycloaddition of Carbon Dioxide to Styrene Oxide Catalyzed by Pyrrolidinopyridinium Iodides
Zinc-Accelerated Cycloaddition of Carbon Dioxide to Styrene Oxide Catalyzed by Pyrrolidinopyridinium Iodides
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DOI：
10.1007/s11244-014-0257-9
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发表时间：
2014-02
影响因子：
3.6
通讯作者：
Ken Motokura;Shintaro Itagaki;Y. Iwasawa;A. Miyaji;T. Baba
中科院分区：
文献类型：
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作者：
Ken Motokura;Shintaro Itagaki;Y. Iwasawa;A. Miyaji;T. Baba
ZnI2的加入大大加速了碘化吡咯烷吡啶催化的氧化苯乙烯与二氧化碳的环加成反应。在ZnI2存在下，在100 °C和1atm的CO2下，苯乙烯碳酸酯的产率在7h内达到高达89%。通过添加ZnI2，速率常数增加了三倍以上。除了高分辨率质谱和NMR分析之外，反应动力学研究表明主要活性物质由两个或更多个吡咯烷吡啶阳离子与ZnI42−阴离子结合组成。
The addition of ZnI2drastically accelerated the cycloaddition of carbon dioxide to styrene oxide catalyzed by pyrrolidinopyridinium iodides. In the presence of ZnI2, the styrene carbonate yield reached up to 89 % in 7 h at 100 °C under 1 atm of CO2. The rate constant increased by greater than three-fold by the addition of ZnI2. Studies of reaction kinetics in addition to high resolution mass and NMR analysis demonstrated that the primary active species consists of two or more pyrrolidinopyridinium cations combined with ZnI42−anion.