| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1270831 | Ultrasonics Sonochemistry | 2008 | 4 Pages |
Abstract
Sonication of aromatic aldehydes, urea and ethyl acetoacetate in presence of solvent (ethyl alcohol) or solvent-less dry media (bentonite clay) supported-zirconium (IV) chloride (ZrCl4) as catalyst at 35 kHz gives 6-methyl-4-substitutedphenyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid ethyl esters proficiently in high yields.
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Authors
Harish Kumar, Anupama Parmar,