Sodium Carbonate → HCID 9902355, compound

Participants

Reaction Steps

A solution of 3-bromo-2-(4-fluorophenyl)-7-methoxypyrazolo[1,5-a]pyridine (from Example 27,180 mg, 0.560 mmol), 2-fluoropyridin-4-ylboronic acid (from Example 33, 112 mg, 0.800 mmol) and dichlorobis(triphenylphosphine)palladium (40.0 mg, 0.056 mmol) in N,N-dimethylformamide (6.00 mL) was placed in a pre-heated oil bath at 110° C. To the reaction was added, in a dropwise manner, 2M sodium carbonate (0.840 mL, 1.68 mmol). The reaction was allowed to stir for three hours before cooling to room temperature and filtering through a Celite 545 pad. The Celite filter was washed with ethyl acetate and the filtrate was concentrated to dryness at 50° C. under vacuum. The residue was dissolved in methylene chloride and dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated and purified by silica gel chromatography to yield the title compound (110 mg, 0.326 mmol, 58%). 1H NMR (CDCl3): δ 8.14(d, 1H, J=5.5 Hz), 7.53(dd, 2H, J=6.0, 8.0 Hz), 7.24–7.32(m, 2H), 7.00–7.10(m, 3H), 6.89(s, 1H), 6.23(dd, 1H, J=2.0, 6.0 Hz), 4.2(s, 3H). MS (ES+ve): 338.1 (40, M+), 323.1 (100).

Provenance & Evidence