Tetrahydrofuran → 6-(4-(4-cyano-3-fluoro-2-methylphenyl)-5-methoxy-1H-pyrazol-1-yl)nicotinic acid

関与物質

反応手順

Combined 6-(4-bromo-5-methoxy-1H-pyrazol-1-yl)nicotinic acid (500 mg, 1.677 mmol), 2-fluoro-3-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (876 mg, 3.35 mmol), THF (10.500 mL), and water (3.50 mL) in a microwave vial. Degassed with nitrogen then added [1,1′-bis(di-tert-butylphosphino)ferrocene]dichloropalladium(II) (1093 mg, 1.677 mmol) and sodium carbonate (711 mg, 6.71 mmol). The reaction was degassed 2 minutes more, then capped and subjected to microwave irradiation at 110° C. for 1 hour. The reaction mixture was then diluted with EA (20 mL) and washed with water (20 mL). A precipitate was observed in the aqueous layer which was filtered and the solids collected to give 6-(4-(4-cyano-3-fluoro-2-methylphenyl)-5-methoxy-1H-pyrazol-1-yl)nicotinic acid (275 mg, 0.781 mmol, 46.5%) which was dried under vacuum and used in the next step without further purification. ESI-MS m/z [M+H]+ 353.2.

情報源と証拠