反应详情

To 600 ml of acetone solution containing 30.0 g (0.15 mol) of 5-bromo-2-hydroxybenzaldehyde was added 20.6 g (0.15 mol) of potassium carbonate, and then, 12.5 ml (0.17 mol) of chloromethylmethyl ether was added dropwise to the mixture over 30 minutes under ice-cooling. After stirring the mixture at the same temperature for 30 minutes, the mixture was further stirred at room temperature for 5 hours. After completion of the reaction, 600 ml of water was added to the reaction mixture. A pH of the mixture was adjusted to 7.6 with conc. hydrochloric acid, and extracted with ethyl acetate. The organic layer after separation was washed with a saturated aqueous solution of sodium chloride, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to obtain 28.4 g of the title compound as a pale yellowish oil. (Yield: 77%)

1. temperaturecooling
2. stirringthe mixture was further stirred at room temperature for 5 hours
3. additionwas added to the reaction mixture
4. extractionextracted with ethyl acetate
5. customThe organic layer after separation
6. washwas washed with a saturated aqueous solution of sodium chloride
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated under reduced pressure