Gallium(III) Iodide‐catalyzed Biginelli‐type Reaction Under Solvent‐free Conditions: Efficient Synthesis of Dihydropyrimidine‐2(1H)‐one Derivatives

The Biginelli‐type condensation of ethyl acetoacetate/cycloketone, aldehyde and urea/thiourea under solvent‐free condition catalyzed by 10% gallium(III) iodide to form dihydropyrimidine‐2(1H)‐one derivatives was described. This process offered one way to constructing dihydropyrimidine‐2(1H)‐ones in good to excellent yields with simple procedure and short reaction time.