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A simple and efficient one-pot multicomponent solvent-free protocol developed for the synthesis of 3,4-dihydropyrimidine-2-one derivatives from the reaction of various aromatic aldehyde, ethyl acetoacetate, urea, and dioxane-HCl as a catalyst. The main advantages of this protocol are solvent-free, atom economy, inexpensive, excellent product yield, and use of Dioxane-HCl complex as a catalyst.

Rapid One-Pot Multicomponent Dioxane-HCl Complex Catalyzed Solvent-Free Synthesis of 3,4-Dihydropyrimidine-2-One Derivatives