Catalytic synthesis of 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane with H_4SiW_6Mo_6O_(40)/SiO_2

A novel catalyst,H4SiW6Mo6O40 /SiO2 was synthesized by a sol-gel technique,and characterized by FTIR and XRD.2-Methyl-2-ethoxycarbonylmethyl-1,3-dioxolane was synthesized from ethyl acetoacetate and ethylene glycol in the presence of H4SiW6Mo6O40 /SiO2 as catalyst.The factors influencing the synthesis were discussed and the best reaction conditions were found out.Experimental results showed that H4SiW6Mo6O40 /SiO2 is an excellent catalyst.Under the exeperimental conditions as follows:molar ratio of ethyl acetoacetate to ethylene glycol is 1:1.5,the mass ratio of the catalyst is 1.0% of all the reactants,volume of cyclohexane is 8mL,and the reaction time is 60 min,the yield of 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane can reach 72.8 %.