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A chemical placebo: NaCl as an effective, cheapest, non-acidic and greener catalyst for Biginelli-type 3,4-dihydropyrimidin-2(1H)-ones (-thiones) synthesis

✍ Scribed by Maksim A. Kolosov; Valeriy D. Orlov; Dmitriy A. Beloborodov; Victor V. Dotsenko

Book ID: 106468242
Publisher: Springer
Year: 2008
Tongue: English
Weight: 825 KB
Volume: 13
Category: Article
ISSN: 1381-1991
DOI: 10.1007/s11030-008-9094-8

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## Abstract magnified image 3,4‐Dihydropyrimidin‐2‐(1__H__)‐ones and their thione analogues are synthesized from the condensation of aromatic aldehydes, β‐dicarbonyl compound and urea or thiourea in presence of 5 mol% of oxalic acid in ethanol‐water (1:2; v/v) under mild reaction conditions. The y