反应详情

To a solution of ethyl 4-hydroxy-3-methoxyphenylacetic acid (25 g, 120 mmol), commercially available from Aldrich Chemical Company, in acetone (150 mL) was added potassium carbonate (50 g, 360 mmol) followed by benzyl bromide (23 g, 130 mmol). The reaction mixture was stirred at ambient temperature for 15 hours and then was concentrated under reduced pressure. The residue was partitioned between 500 mL of water and 500 mL of diethyl ether. The aqueous layer was extracted with 300 mL of diethyl ether and the combined organic layers were dried over anhydrous magnesium sulfate, filtered and concentrated to give 32 g of the title compound as a yellow solid. The product was carried on to the next step without purification.

1. concentrationwas concentrated under reduced pressure
2. customThe residue was partitioned between 500 mL of water and 500 mL of diethyl ether
3. extractionThe aqueous layer was extracted with 300 mL of diethyl ether
4. dry with materialthe combined organic layers were dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated