Research Article
An Efficient One-Pot Multi-Component Synthesis of 3,4-Dihydropyrimidin-2-(1H)-Ones/Thiones Catalyzed by Bismuth (III) Sulfate Trihydrate under Solvent-Free Conditions
Table 1
Bismuth (III) sulfate trihydrate catalyzed synthesis of 5-(ethoxycarbonyl)-4-phenyl-6-methyl-3,4-dihydropyrimidin-2(1H)-one (5a) in different solvents conditions.
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Reaction conditions: 2 mmol benzaldehyde, 2.5 mmol ethyl acetoacetate, 2.5 mmol urea/thiourea, and Bismuth (III) sulfate trihydrate (10 mol%) were refluxed with stirring for 60 min. |