Imidazole → HCID 58072364, compound

Participants

Reaction Steps

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), imidazole (40.8 mg, 0.6 mmol), CuI (9.5 mg, 0.05 mmol), trans-1,2-diaminocyclohexane (0.012 mL, 0.1 mmol), and Cs2CO3. (326 mg, 1.0 mmol) in 1,4-dioxane (2 mL) was refluxed for 4 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 AcOEt/THF (1/0-0/1) and crystallized from MeOH to give the title compound (16.5 mg, 8% yield) as a white solid: mp 235-236° C. (dec); 1H NMR (300 MHz, CDCl3): δ ppm 3.93 (3H, s), 6.49 (1H, t, J=8.7 Hz), 7.03 (1H, ddd, J=1.1, 2.3, 8.7 Hz), 7.22-7.27 (3H, m), 7.35 (1H, d, J=1.9 Hz), 7.38-7.49 (5H, m), 7.80 (1H, d, J=1.9 Hz), 7.82 (1H, d, J=2.6 Hz), 7.86 (1H, t, J=1.1 Hz). LC-MS (ESI) m/z 429 [M+H]+. Anal. Calcd for C23H17FN6O2: C, 64.48; H, 4.00; N, 19.62. Found: C, 64.35 H, 3.90; N, 19.43.

Provenance & Evidence