期刊
CATALYSIS COMMUNICATIONS
卷 6, 期 1, 页码 57-60出版社
ELSEVIER
DOI: 10.1016/j.catcom.2004.10.011
关键词
room temperature ionic liquid; Pechmann reaction; acidic counterion; microwave irradiation; [bmim][HSO4] (1-butyl-3-methyl-imidazolium; hydrogen sulphate)
A efficient and easy method for preparation of (1-butyl-3-methyl-imidazolium hydrogen sulphate) ionic liquid using sodium bisulphate in place of concentrated sulphuric acid by microwave irradiation had been developed by us with manifold reduction in time. Further, this acidic room temperature ionic liquid has been exploited for the synthesis of coumarins under microwave irradiation and solventless conditions in short duration of time with quantitative yields, for the first time. (C) 2004 Elsevier B.V. All rights reserved.
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