Ethanol → HCID 57545294, compound

Participants

Reaction Steps

1-[4-Amino-2-(2-methoxyethyl)-7-(3-nitrobenzyloxy)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol (3.1 g, 6.66 mmol) was mixed with 100 mL of warm ethanol and 1 g of 5% platinum on carbon. The mixture was shaken under hydrogen pressure (50 psi, 3.4×105 pa) for 5 hours. The material had come out of solution so an additional 100 mL of methanol and 0.5 g platinum catalyst were added. After shaking under hydrogen pressure overnight, the mixture was filtered through CELITE filter agent. The filter cake was washed with 3×75 mL portions of hot methanol and the filtrates were combined and concentrated under reduced pressure. An orange foam resulted which was purified by column chromatography using silica gel. The polar component of the eluent was chloroform:methanol: 2% aqueous ammonium hydroxide 80:18:2 (CMA), and elution was carried out with CMA:chloroform in a gradient from 0:100 to 40:60. Fractions containing product were combined and concentrated to yield 1.55 g of 1-[4-amino-7-(3-aminobenzyloxy)-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol as an off-white solid. A small portion was recrystallized from acetonitrile to provide an analytical sample, mp 203.0-206.0° C.

Provenance & Evidence