Triethylamine → HCID 21984182, compound

Participants

Reaction Conditions

Reaction Steps

A round bottom flask, equipped with a stir bar, was charged with 1-[4-amino-7-bromo-2-(ethoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol (1.18 g, 3.0 mmol), 1-propanol (30 mL), potassium vinyltrifluoroborate (0.4 g, 3.0 mmol), triethylamine (1.25 mL, 9.0 mmol) and dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloromethane adduct (Pd(dppf)), (11 mg, 0.015 mmol). The reaction mixture was heated at 80° C. for 66 hours. The reaction mixture was cooled to ambient temperature and then concentrated to dryness under reduced pressure. The solid was dissolved in dichloromethane (100 mL) and washed with saturated aqueous potassium carbonate (50 mL). The fractions were separated and the organic fraction was concentrated to dryness. The off-white solid was purified by chromatography using a HORIZON HPFC system (silica cartridge, 0-15% CMA/chloroform). Recrystallization from acetonitrile provided 0.31 g of 1-[4-amino-2-(ethoxymethyl)-7-vinyl-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol as an off-white crystalline solid. MS (APCI) m/z 341 (M+H)+.

Provenance & Evidence