【Abstract】 An efficient one-pot synthesis method for 3,4-dihydropyrimidinones using lanthanum chloride heptahydrate as a catalyst by the reaction of aldehyde, β-keto ester and urea(in molar ratio 1∶1∶1 5) in ethanol is described. The method is simple and affords product in good yield(80%~90%).更多还原