Journal
SYNTHETIC COMMUNICATIONS
Volume 42, Issue 2, Pages 227-235Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00397911.2010.523488
Keywords
Biginelli reaction; Bronsted acidic ionic liquid; 3-carboxypyridinium hydrogensulfate; dihydropyrimidinone; one-pot; solvent-free
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Funding
- Isfahan University of Technology (IUT), Iran
- Center of Sensor and Green Chemistry Research (IUT)
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In this work, the synthesis and characterization of 3-carboxypyridinium hydrogensulfate ([Hcpy]HSO4) as a new Bronsted acidic ionic liquid are reported. This reusable, inexpensive, and green catalyst was employed for one-pot condensation of 1,3-dicarbonyl compounds, aromatic aldehydes and urea or thiourea for the synthesis of the corresponding 3,4-Dihydropyrimidin-2(1H)-ones. The reactions were carried out under solvent-free and green conditions. The procedure gave the products in excellent yields within very short reaction times.
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