期刊
CATALYSIS COMMUNICATIONS
卷 9, 期 15, 页码 2475-2480出版社
ELSEVIER
DOI: 10.1016/j.catcom.2008.06.021
关键词
benzimidazolium; Bronsted acidic ionic liquid; acetalization; aromatic aldehyde
资金
- National Natural Science Foundation of China [20503016]
- National 863 High-Tech Research and Development Program of China [2007AA05Z101]
In this article, a new group of Bronsted acidic task-specific ionic liquids based on benzimidazolium cation was synthesized and used as environmentally benign catalysts for acetalization of aromatic aldehydes with diols. Hammett method had been used to determine the acidity order of these ionic liquids, which was consistent with the catalytic activities observed in acetalization reaction. Maximum substrate conversion of 98% and product selectivity of 100% were obtained using [PSebim]HSO4 as catalyst, which could be reused at least 10 times without obvious loss of catalytic activity. (C) 2008 Elsevier B.V. All rights reserved.
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