Journal
SYNTHETIC COMMUNICATIONS
Volume 34, Issue 20, Pages 3821-3825Publisher
TAYLOR & FRANCIS INC
DOI: 10.1081/SCC-200032533
Keywords
Biginelli reaction; bismuth subnitrate; dihydropyrimidinones; one-pot condensation
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An efficient synthesis of 3,4-dihydropyrimidinones (DHPMs) using bismuth subnitrate as the catalyst for the first time from an aldehyde, beta-ketoester, and urea in acetonitrile is described. This new method consistently has the advantage of excellent yields (88-96%) and short reaction times (1.5-4h) than do classical Biginelli reaction conditions.
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