Dimethylformamide → HCID 86629391, compound

Participants

Reaction Conditions

Reaction Steps

A thick walled glass tube, equipped with a stir bar, was charged with palladium (II) acetate (12 mg, 0.05 mmol), acetonitrile (20 mL), N,N-dimethylformamide (15 mL) triethylamine (1.10 mL, 7.92 mmol), tri-o-tolylphosphine (48 mg, 0.16 mmol), methyl vinyl sulfone (294 mg, 2.77 mmol) and 1-[4-amino-7-bromo-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-1-yl)-2-methylpropan-2-ol (1.00 g, 2.64 mmol). The reaction mixture was purged with nitrogen. The tube was sealed and heated at 120° C. in an oil bath. The reaction was maintained at 120° C. for 18 hours and then cooled to ambient temperature. The reaction was filtered and the filtrate was concentrated under reduced pressure. The resulting solid was partitioned between chloroform (100 mL) and aqueous 1% sodium carbonate (100 mL). The fractions were separated and the aqueous fraction was extracted with chloroform (5×50 mL). The combined organic fractions were concentrated and purified by chromatography using a HORIZON HPFC system (silica cartridge, eluting with 0-6% gradient of methanol in dichloromethane) to provide 750 mg of 1-{4-amino-2-(methoxymethyl)-7-[2-(methylsulfonyl)ethenyl]-1H-imidazo[4,5-c]quinolin-1-yl}-2-methylpropan-2-ol as a yellow semi-solid. MS (ESI) m/z 405 (M+H)+.

Provenance & Evidence