反应详情

A mixture of 4′-hydroxy-2′,6′-dimethylbiphenyl-3-carbaldehyde (1.05 g, 4.64 mmol), ethyl 3-(4-amino-2-fluorophenyl)propanoate. (1.00 g, 4.73 mol), acetic acid (0.80 mL, 14 mmol) and 1,2-dichloroethane (20 mL) was stirred at room temperature for 2 hr, and sodium triacetoxyborohydride (3.00 g, 14.2 mmol) was added. The mixture was stirred overnight at room temperature and concentrated. Ethyl acetate was added to the residue, and the mixture was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The mixture was purified by silica gel column chromatography (30% ethyl acetate/hexane) to give the title compound (1.29 g, yield 66%) as a yellow oil.

1. concentrationconcentrated
2. additionEthyl acetate was added to the residue
3. washthe mixture was washed with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe mixture was purified by silica gel column chromatography (30% ethyl acetate/hexane)