反应详情

Combine methyl 3-methoxy-4,5-dihydroxybenzoate (0.5 g, 2.5 mmol) and potassium carbonate (1.74 g, 12.65 mmol) in acetone (25 mL). Add dibromoethane (2.37 g, 12.65 mmol). Heat to reflux. After 24 hours, cool in an ice bath, acidify with a 1 M aqueous hydrochloric acid solution (35 mL), add water (25 mL), and extract three times with ethyl acetate. Combine the organic layers and extract with brine. Dry over-MgSO4, filter, and concentrate in vacuo to give methyl 3-methoxy-4,5-ethylenedioxybenzoate.

1. temperatureHeat to reflux
2. temperaturecool in an ice bath
3. extractionextract three times with ethyl acetate
4. extractionextract with brine
5. dry with materialDry over-MgSO4
6. filtrationfilter
7. concentrationconcentrate in vacuo