Author： Cheng Weiguo Fu Zengzeng Wang Jinquan Sun Jian Zhang Suojiang
Publisher： Taylor & Francis Ltd
ISSN： 0039-7911
Source： Synthetic Communications, Vol.42, Iss.17, 2012-09, pp. : 2564-2573
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Abstract
In this work, ZnBr2-based choline chloride (CH) was first investigated to catalyze the synthesis of cyclic carbonates from CO2 and epoxides under solventless conditions. It was demonstrated that ZnBr2-based CH was very efficient and selective. Under the optimum reaction conditions, 99% yield of propylene carbonate was achieved. The catalyst can be reused five times without loss of catalytic activity. It was proved to be very active in a variety of terminal epoxides with CO2. In addition, a synergistic catalytic mechanism by Zn2+ and -OH was proposed.
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