[CH3:1][O:2][C:3]1[CH:8]=[C:7]([O:9][CH3:10])[CH:6]=[C:5]([O:11][CH3:12])[CH:4]=1.[CH3:13][O:14][CH:15]([O:21]C)[CH2:16][C:17](OC)=O.C(O)(=O)C.Cl>O>[CH3:12][O:11][C:5]1[CH:4]=[C:3]([O:2][CH3:1])[CH:8]=[C:7]([O:9][CH3:10])[C:6]=1/[CH:17]=[CH:16]/[C:15]([O:14][CH3:13])=[O:21]1.7 g of 1,3,5-trimethoxybenzene, 1.68 g of methyl 3,3-dimethoxypropionate and 12 mL of glacial acetic acid were mixed, 313 mg of 35 wt % hydrochloric acid was added into the mixture at an inner temperature of 25° C., the added mixture was stirred for 1 hour at the same temperature to cause a reaction. After completion of the reaction, 36 mL of water was added dropwise into the reaction liquid, and the precipitated crystals were filtrated. The crystals were washed with 20 vol % of aqueous methanol, then, dried to obtain 2.46 g of methyl trans-3-(2,4,6-trimethoxyphenyl)acrylate (white solid). Yield: 98%.
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