反应详情

A mixture of 1-[4-(3,6-dihydro-2H-pyran-4-yl)-2-fluorophenyl]-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (300 mg, 0.675 mmol), 10% Pd—C (50% wet, 300 mg), THF (30 mL), and MeOH (30 mL) was hydrogenated for 2 h at room temperature. The reaction mixture was filtered, and the filtrate was concentrated under reduced pressure. The residue was recrystallized from MeOH/H2O to give the title compound (255 mg, 85% yield) as a white solid: mp 187-189° C.; 1H NMR (300 MHz, CDCl3): δ ppm 1.57-1.83 (4H, m), 2.72-2.82 (1H, m), 3.45-3.58 (2H, m), 3.90 (3H, s), 4.09 (2H, td, J=3.0, 11.3 Hz), 6.35 (1H, t, J=8.3 Hz), 6.86 (1H, dd, J=1.5, 8.3 Hz), 7.03 (1H, dd, J=1.9, 12.8 Hz), 7.28 (1H, d, J=1.9 Hz), 7.35-7.46 (5H, m), 7.78 (1H, d, J=1.9 Hz), 7.79 (1H, d, J=2.6 Hz). LC-MS (ESI) m/z 447 [M+H]+. Anal. Calcd for C25H23FN4O3: C, 67.25; H, 5.19; N, 12.55. Found: C, 67.13H, 5.13; N, 12.57.

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe residue was recrystallized from MeOH/H2O