Journal
TETRAHEDRON LETTERS
Volume 44, Issue 4, Pages 857-859Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(02)02612-6
Keywords
Biginelli reaction; dihydropyrimidinones; ammonium chloride; one-pot condensation; solvent-free
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Ammonium chloride as a very inexpensive and readily available reagent, and efficiently catalyzes one-pot, three component, Biginelli condensation reactions of aldehydes, 1,3-dicarbonyl compounds and urea or thiourea under solvent-free conditions to afford the corresponding 3,4-dihydropyrimidin-2-(1H)-ones in high yields at 100degreesC. (C) 2003 Elsevier Science Ltd. All rights reserved.
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