反应详情

A mixture of ethyl 3-(2-hydroxy-4-methoxymethoxyphenyl)propionate (6.00 g), ethyl iodide (5.52 g), anhydrous potassium carbonate (3.26 g) and N,N-dimethylformamide (50 mL) was stirred at room temperature for 13 hrs. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated to give an oil. A mixture of the obtained oil, 10% aqueous sulfuric acid solution (10 mL) and ethanol (300 mL) was stirred with heating under reflux for 6 hrs. The reaction mixture was concentrated under reduced pressure and the residue was diluted with water, and then basified with a saturated aqueous sodium hydrogencarbonate. The mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The obtained residue was subjected to silica gel column chromatography to give ethyl 3-(2-ethoxy-4-hydroxyphenyl)propionate as a colorless oil (3.58 g, 64%) from a fraction eluted with ethyl acetate-hexane (1:6, v/v).

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated
5. customto give an oil
6. stirringwas stirred
7. temperaturewith heating
8. temperatureunder reflux for 6 hrs
9. concentrationThe reaction mixture was concentrated under reduced pressure
10. additionthe residue was diluted with water
11. extractionThe mixture was extracted with ethyl acetate
12. washThe organic layer was washed with saturated brine
13. dry with materialdried over anhydrous magnesium sulfate
14. concentrationconcentrated