反应详情

温度

0 °C

Acetyl chloride (7.9 ml, 111 mmol) in dichloromethane (50 ml) was added dropwise to a cold (0° C.) solution of ethyl (3S)-3-amino-3-(3-fluorophenyl)propanoate (WO99/31099, Scheme 3 page 97) (25.2 g, 102 mmol) in dichloromethane (200 ml). The reaction was stirred for 2 hours at 0° C., then water (100 ml) was added. The reaction mixture was adjusted to pH 1 with 2 N hydrochloric acid and the organic layer separated. The dichloromethane layer was washed with saturated sodium hydrogencarbonate solution (50 ml), water (50 ml) and then dried (MgSO4). Solvent was evaporated under reduced pressure to afford a thick oil which was purified by column chromatography (silica gel, eluting with diethyl ether) to give the title compound as a clear, colourless oil, 25.1 g.

1. customthe organic layer separated
2. washThe dichloromethane layer was washed with saturated sodium hydrogencarbonate solution (50 ml), water (50 ml)
3. dry with materialdried (MgSO4)
4. customSolvent was evaporated under reduced pressure
5. customto afford a thick oil which
6. customwas purified by column chromatography (silica gel, eluting with diethyl ether)