Ethyl orthoformate → 1-{2-[2-(methylsulfonyl)ethoxy]ethyl}-1H-imidazo[4,5-c]quinoline

Participants

Reaction Steps

Triethyl orthoformate (2 mL, 12 mmol) was added to a stirred solution of N4-{2-[2-(methylsulfonyl)ethoxy]ethyl}quinoline-3,4-diamine (3.1 g, 10 mmol) in acetonitrile (50 mL). Pyridine hydrochloride (0.3 g) was added and the reaction mixture was heated to reflux with the volatiles being collected in a Dean Stark trap. After 20 minutes analysis by TLC indicated that the starting material was consumed. The reaction mixture was concentrated under reduced pressure to provide a viscous oil. The oil was triturated with ethyl acetate. The resulting solid was isolated by filtration and washed with ethyl acetate to provide 2.17 g of 1-{2-[2-(methylsulfonyl)ethoxy]ethyl}-1H-imidazo[4,5-c]quinoline as an off-white powder.

Provenance & Evidence