Methanol → HCID 86629393, compound

Participants

Reaction Steps

A solution of 1-isobutyl-8-vinyl-1H-imidazo[4,5-c]quinolin-4-amine (500 mg, 1.9 mmol) in dichloromethane (30 mL) and methanol (5 mL) was cooled to −78° C. Ozone was bubbled through the solution for 10 minutes. While still cold, the reaction was purged with oxygen for 15 minutes and dimethyl sulfide (0.7 mL, 9.4 mmol) was added. The reaction was warmed to ambient temperature and then concentrated under reduced pressure. The residue was dissolved in dichloromethane (50 mL) and washed with 1% aqueous sodium carbonate (2×15 mL). The combined aqueous fractions were extracted with chloroform (3×20 mL) and sequentially dried (MgSO4), filtered, and purified by chromatography using a HORIZON HPFC system (silica cartridge, eluting with a gradient of 0-6% methanol in dichloromethane) to provide 237 mg of 4-amino-1-isobutyl-1H-imidazo[4,5-c]quinoline-8-carbaldehyde as an off-white solid. MS (ESI) m/z 269 (M+H)+.

Provenance & Evidence