Triethylamine → 2-{2-[2-ethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethenyl}-1H-isoindole-1,3(2H)-dione

Participants

Reaction Conditions

Reaction Steps

A thick walled glass tube, equipped with a stir bar, was charged with palladium (II) acetate (64 mg, 0.29 mmol), acetonitrile (50 mL), N-vinylphthalimide (1.19 g, 6.89 mmol), triethylamine (2.4 mL, 17 mmol), tri-o-tolylphosphine (260 mg, 0.86 mmol) and 1-(7-bromo-2-ethyl-1H-imidazo[4,5-c]quinolin-1-yl)-2-methylpropan-2-ol (2.00 g, 5.74 mmol). The reaction mixture was purged with nitrogen and the tube was sealed and heated at 120° C. in an oil bath for 16 hours. The reaction was cooled to ambient temperature and silica gel (20 g) was added followed by concentration under reduced pressure. The sample absorbed on silica was purified by chromatography using a HORIZON HPFC system (silica cartridge, eluting with a 0-7% gradient of methanol in dichloromethane). The recovered solid was washed with 1% aqueous sodium carbonate to provide 1.95 g of 2-{2[2-ethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethenyl}-1H-isoindole-1,3(2H)-dione as a bright yellow solid. MS (APCI) m/z 441 (M+H)+.

Provenance & Evidence