反应详情

To a solution of ethyl 3-(4-amino-2-fluorophenyl)propanoate (1.48 g, 7.00 mmol) and 4′-(2-ethoxyethoxy)-2′,6′-dimethylbiphenyl-3-carbaldehyde (2.09 g, 7.00 mmol) in toluene (15 mL) were added molecular sieves (0.4 nm, beads, 3.5 g), and the mixture was stirred at room temperature for 30 hr. The reaction mixture was filtered through celite, and the filtrate was concentrated under reduced pressure. The obtained residue was dissolved in ethanol (20 mL), 10% palladium-carbon (50% water-containing product, 0.5 g) was added, and the mixture was stirred under a hydrogen atmosphere (balloon pressure) at room temperature for 12 hr. The catalyst was filtered off, and the obtained filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (5%-30% ethyl acetate/hexane) to give the title compound (2.88 g, yield 83%) as a colorless oil.

1. filtrationThe reaction mixture was filtered through celite
2. concentrationthe filtrate was concentrated under reduced pressure
3. dissolutionThe obtained residue was dissolved in ethanol (20 mL)
4. addition10% palladium-carbon (50% water-containing product, 0.5 g) was added
5. stirringthe mixture was stirred under a hydrogen atmosphere (balloon pressure) at room temperature for 12 hr
6. filtrationThe catalyst was filtered off
7. concentrationthe obtained filtrate was concentrated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (5%-30% ethyl acetate/hexane)