反应详情

MeMgBr (1 M solution in THF, 50 mL, 50 mmol) was added dropwise at −78° C. to a solution of N,5-dimethoxy-1-[2-methoxy-4-(1H-pyrazol-1-yl)phenyl]-N-methyl-4-oxo-1,4-dihydropyridazine-3-carboxamide (6.32 g, 16.4 mmol) in THF (100 mL). After stirring for 1 h, the reaction mixture was quenched with 1 M HCl aqueous solution and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was washed with AcOEt and recrystallized from MeOH to give the title compound (1.53 g, 27% yield) as pale yellow prisms: mp 193-196° C.; 1H NMR (300 MHz, CDCl3): δ ppm 2.69 (3H, s), 3.90 (3H, s), 4.00 (3H, s), 6.54 (1H, dd, J=1.9, 2.3 Hz), 7.30 (1H, dd, J=2.3, 8.7 Hz), 7.57 (1H, d, J=8.7 Hz), 7.63 (1H, d, J=2.3 Hz), 7.77-7.78 (2H, m), 8.00 (1H, d, J=2.3 Hz). Anal. Calcd for C12H16N4O4: C, 59.99; H, 4.74; N, 16.46. Found: C, 59.68; H, 5.00; N, 16.26.

1. customthe reaction mixture was quenched with 1 M HCl aqueous solution
2. extractionextracted with AcOEt
3. washThe extract was washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated under reduced pressure
6. washThe residue was washed with AcOEt
7. customrecrystallized from MeOH