Sodium Hydroxide → HCID 58917328, compound

Participants

Reaction Steps

A mixture of 2-(ethoxymethyl)-1-{2-methyl-2-[2-(methylsulfonyl)ethoxy]propyl}-1H-imidazo[4,5-c]quinolin-4-amine (prepared as described in Example 9, 1.70 g, 4.04 mmol) and platinum(IV) oxide (1.0 g) in trifluoroacetic acid (20 mL) was hydrogenated on a Parr apparatus at 50 psi (3.5×105 Pa) hydrogen pressure for 40 hours. The mixture was filtered through CELITE filter agent, which was washed afterwards with dichloromethane. The filtrate was concentrated under reduced pressure to afford an oil that was suspended in water (20 mL) and adjusted to pH 13 with 50% aqueous sodium hydroxide. The mixture was extracted with dichloromethane (3×50 mL). The organic layers were combined, dried over sodium sulfate, filtered, and concentrated under reduced pressure to yield a white solid. The solid was recrystallized from toluene to afford 1.3 g of 2-(ethoxymethyl)-1-{2-methyl-2-[2-(methylsulfonyl)ethoxy]propyl}-6,7,8,9-tetrahydro-1H-imidazo[4,5-c]quinolin-4-amine as a white, fluffy powder, mp 150-153° C.

Provenance & Evidence