反应详情

(S)-3-Methylmorpholine (119 mg, 0.86 mmol), 4-bromo-3-fluorobenzaldehyde (175 mg, 0.86 mmol) triethylamine (132 μl, 0.95 mmol) and sodium triacetoxyborohydride (274 mg, 1.29 mmol) were dissolved in dichloroethane (2.5 ml). The mixture was stirred at ambient temperature under argon atmosphere for 24 h. Hydrochloric acid (1M) was added until pH 1-2. The mixture was washed with dichloromethane. The aqueous phase was made alkaline with KOH (1M, aq) and extracted with dichloromethane. The combined organic phases were dried over Na2SO4 and concentrated in vacuo to give (S)-4-(4-bromo-3-fluorobenzyl)-3-methylmorpholine (220 mg, 89%).

1. washThe mixture was washed with dichloromethane
2. extractionextracted with dichloromethane
3. dry with materialThe combined organic phases were dried over Na2SO4
4. concentrationconcentrated in vacuo