反应详情

A solution of methyl 2-amino-3-(3,5-difluorophenyl)propanoate hydrochloride (3.67 g, 14.6 mmol) in aqueous ammonium hydroxide (5.5 mL) and water (22 mL) was stirred at ambient temperature for 18 hours and extracted with dichloromethane (4×50 mL). The combined organic layers were dried over anhydrous sodium sulphate, filtered and concentrated in vacuo to dryness to give 2-amino-3-(3,5-difluorophenyl)propanamide as a colorless solid (1.50 g, 51%): 1H NMR (300 MHz, CD3OD) δ 6.92-6.75 (m, 3H), 3.56 (dd, J=7.3, 6.3 Hz, 1H), 3.00 (dd, J=13.4, 6.3 Hz, 1H), 2.83 (dd, J=13.4, 7.4 Hz, 1H).

1. extractionextracted with dichloromethane (4×50 mL)
2. dry with materialThe combined organic layers were dried over anhydrous sodium sulphate
3. filtrationfiltered
4. concentrationconcentrated in vacuo to dryness