Nineteen N1-substituted 3,4-dihydropyrimidin-2(1H)-ones derivatives(eleven new compounds) were synthesized by an one-pot reaction of aromatic aldehydes,methyl(ethyl) acetoacetate and N-substituted ureas using CuCl_2·2H_2O as a catalyst under solvent-free conditions.The structures were characterized by ~1H NMR,~(13)C NMR and MS.The effects of the catalyst dosage and the reaction temperature on the yields were investigated.The results showed that the optimal reaction conditions were as follows:the catalyst do...
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