Highly active, hexabutylguanidinium salt/zinc bromide binary catalyst for the coupling reaction of carbon dioxide and epoxides
Highly active, hexabutylguanidinium salt/zinc bromide binary catalyst for the coupling reaction of carbon dioxide and epoxides
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DOI：
10.1016/j.molcata.2006.01.038
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发表时间：
2006-05
影响因子：
--
通讯作者：
Haibo Xie;Shenghai Li;Suobo Zhang
中科院分区：
文献类型：
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作者：
Haibo Xie;Shenghai Li;Suobo Zhang
本文开发了一种实验上简单、廉价的六丁基胍/ znbr2催化剂体系，用于二氧化碳和环氧化物在温和的反应条件下偶联生成具有显著催化活性的环状碳酸盐，而不需要使用额外的有机溶剂（例如，苯乙烯氧化物的周转率（TOF, h−1）值高达6.6×103h−1，环氧氯丙烷的周转率（TOF, h−1）高达1.01×104h−1）。该催化剂体系还具有可回收和可重复使用的优点。因此，它是一种非常有效、环保、简单的催化工艺。六丁基溴化胍离子液体特殊的立体性和亲电性使得该新型催化剂体系具有优异的催化性能。
An experimentally simple and inexpensive catalyst system based on hexabutylguanidinium/ZnBr2has been developed for the coupling of carbon dioxide and epoxides to form cyclic carbonates with significant catalytic activity under mild reaction conditions without using additional organic solvents (e.g. the turnover frequencies (TOF, h−1) values as high as 6.6×103h−1for styrene oxide and 1.01×104h−1for epichlorohydrin). This catalyst system also offers the advantages of recyclability and reusability. Therefore, it is a very effective, environmentally benign, and simple catalytic process. The special steric and electrophilic characteristics of hexabutylguanidinium bromide ionic liquid result in the prominent performance of this novel catalyst system.