反应详情

Triethyl orthopropionate (15.1 mL of 97%, 1.1 eq.) and a catalytic amount of pyridine hydrochloride were added to a solution of 4-[(3-aminoquinolin-4-yl)amino]butan-1-ol (16 g, 69 mmol, 1 eq.) in pyridine (150 mL). The reaction mixture was refluxed for 1 hour at which time analysis by TLC indicated that all of the starting material had been consumed. The reaction mixture was concentrated under reduced pressure and the residue was triturated with water (300 mL). The resulting solid was isolated by filtration and then recrystallized from ethyl acetate to provide 8.2 g of 4-(2-ethyl-1H-imidazo[4,5-c]quinolin-1-yl)butan-1-ol. A second crop (1.9 g) was obtained by reducing the volume of the mother liquor.

1. temperatureThe reaction mixture was refluxed for 1 hour at which time analysis by TLC
2. customhad been consumed
3. concentrationThe reaction mixture was concentrated under reduced pressure
4. customthe residue was triturated with water (300 mL)
5. customThe resulting solid was isolated by filtration
6. customrecrystallized from ethyl acetate