Journal
SYNTHETIC COMMUNICATIONS
Volume 42, Issue 17, Pages 2564-2573Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00397911.2011.562337
Keywords
Carbon dioxide; choline chloride; cycloaddition; epoxide; zinc bromide
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Funding
- National Natural Sciences Foundation of China [20876162, 20625618]
- National Basic Research Program of China (973 Program) [2009CB219901]
- Key Projects in the National Science and Technology Pillar Program in the Eleventh Five-Year Plan Period [2008BAF33B04]
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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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