Synthesis of 3,5-diacetoxystyrene by solid acid catalyst

3,5-Diacetoxystyrene(1) was synthesized from 3,5-dihydroxyacetophenone(4) in a three-step process.3,5-Diacetoxyacetophenone(3) was synthesized from(4) and acetic anhydride with sulfuric acid as catalyst,the yield of(3) was 92%,(3) was identified by 1H NMR;1-(1-hydroxyethyl)-3,5-diacetoxybenzene(2) was obtained by catalytic hydrogenation from(3),the yield of(2) was 98%,(2) was identified by 1H NMR;(1) was obtained from(2) through a solid acid catalytic reaction,the reaction conditions were as follows:m(2) ∶m(solid acid)= 5 ∶1,reflux reaction time was 5 h at 110 ℃,the yield of(1) was 95% and the purity of(1) was 98%.(1) was identified by IR,1H NMR,MS,the results of 1H NMR of(1) and MS of(1) were resolved further.