Triethylamine → 2-(2-{2-(2-methoxyethyl)-1-[3-(2-oxopyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-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 (17 mg, 0.08 mmol), acetonitrile (50 mL), N-vinylphthalimide (716 mg, 4.13 mmol), triethylamine (1.6 mL, 11 mmol), tri-o-tolylphosphine (69 mg, 0.22 mmol) and 1-{3-[8-bromo-2-(2-methoxyethyl)-1H-imidazo[4,5-c]quinolin-1-yl]propyl}pyrrolidin-2-one (1.62 g, 3.76 mmol). The reaction mixture was purged with nitrogen and the tube was sealed and heated at 120° C. in an oil bath for 15 hours. The reaction was cooled to ambient temperature and methanol (50 mL) and chloroform (50 ml) were added. After filtering through a 0.2 micron PTFE membrane, the solution was concentrated under reduced pressure and then purified by chromatography using a HORIZON HPFC system (silica cartridge, eluting with a 0-8% gradient of methanol in dichloromethane) to provide 2.0 g of 2-(2-{2-(2-methoxyethyl)-1-[3-(2-oxopyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-yl}ethenyl)-1H-isoindole-1,3(2H)-dione as a bright yellow solid.

Provenance & Evidence