Dimethyl Sulfate → Methyl 3-methoxy-2-o-tolylacrylate

反応式

[OH:1][CH:2]=[C:3]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[CH3:14])[C:4]([O:6][CH3:7])=[O:5].[C:15](=O)([O-])[O-].[K+].[K+].S(OC)(OC)(=O)=O>COCCOC>[CH3:15][O:1][CH:2]=[C:3]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[CH3:14])[C:4]([O:6][CH3:7])=[O:5]

参加物

実験手順

To a flask (1000 mL), 48 g of methyl 3-hydroxy-2-o-tolylacrylate, 54.4 g of potassium carbonate, and 500 mL of ethylene glycol dimethyl ether were added. The mixture was stirred at room temperature for an hour, and then 36 mL of dimethyl sulfate was added. The mixture was allowed to react for between 6 and 8 hrs with stiffing at room temperature. The reaction was monitored with thin layer chromatography (TLC) until the reactants were basically consumed. Subsequently, the mixture was filtered, the solvent was removed by vacuum distillation, the residue was washed with water (1000 mL), extracted with ethyl acetate (2×300 mL), dried with anhydrous sodium sulfate and concentrated under reduced pressure to yield a light yellow oily product with a yield of 97%.