Synthesis of Diethyl Malonate Catalyzed by Ferric Sulfate under Microwave Irradiation

In this article,diethyl malonate was synthesized from malonic acid and ethyl alcohol using ferric sulfate as the catalyst under microwave irradiation.The effects of reaction conditions including molar ratio of raw materials,reaction time,the dosage of catalyst,water-carrying agent and reaction temperature were discussed,the optimum reaction conditions were determined as follows:the molar ratio of ethyl alcohol to malonate is 3∶1,dosage of catalyst is 1.0 g,reaction time is 10 min,water-carrying agent is 20 mL.The result showed that the course of reaction is mild and convenient.The yield of the diethyl malonate could be up to 72.1%.The compound synthesized was characterized by refractive index and IR.