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 2
Bismuth (III) sulfate trihydrate catalyzed synthesis of 3,4-dihydropyrimidinones/thiones derivatives.
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Reaction conditions: 2 mmol aldehyde, 2.5 mmol ethyl acetoacetate, 2.5 mmol urea/thiourea, and Bismuth (III) sulfate trihydrate (10 mol%) were refluxed with stirring for 60 min. |