反应详情

A suspension of 1-(2-fluoro-4-iodophenyl)-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (244 mg, 0.5 mmol), 2-pyrrolidinone (0.046 mL, 0.6 mmol), CuI (9.5 mg, 0.05 mmol), trans-1,2-diaminocyclohexane (0.012 mL, 0.1 mmol), and K3PO4 (212 mg, 1.0 mmol) in 1,4-dioxane (2 mL) was refluxed for 6 h under Ar atmosphere. The reaction mixture was poured into water and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography eluting with THF and recrystallized from MeOH/H2O to give the title compound (73.6 mg, 33% yield) as a pale yellow solid: mp 200-202° C.; NMR (300 MHz, CDCl3): δ ppm 2.16-2.26 (2H, m), 2.62-2.68 (2H, m), 3.82-3.87 (2H, m), 3.90 (3H, s), 6.40 (1H, t, J=9.0 Hz), 7.10 (1H, ddd, J=1.1, 2.3, 9.0 Hz), 7.30 (1H, d, J=1.9 Hz), 7.35-7.45 (5H, m), 7.77-7.83 (3H, m). LC-MS (ESI) m/z 446 [M+H]+. Anal. Calcd for C24H20FN5O3.0.25H2O: C, 64.06; H, 4.59; N, 15.59. Found: C, 64.08; H, 4.57; N, 15.49.

1. temperaturewas refluxed for 6 h under Ar atmosphere
2. extractionextracted with AcOEt
3. washThe extract was washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by basic silica gel column chromatography
7. washeluting with THF
8. customrecrystallized from MeOH/H2O