Water → 5-(2-Methoxyethoxy)-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one

Participants

Reaction Steps

A suspension of 5-hydroxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (100 mg, 0.25 mmol), 2-bromoethyl methyl ether (0.070 mL, 0.75 mmol), and K2CO3 (104 mg, 0.75 mmol) in DMF (1 mL) was stirred for 24 h at room temperature. 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 hexane/AcOEt (1/2) to give the title compound (89.9 mg, 79% yield) as a pale yellow amorphous solid: 1H NMR (300 MHz, CDCl3): δ ppm 3.45 (3H, s), 3.78-3.81 (2H, m), 4.42-4.44 (2H, m), 7.02 (1H, dd, J=1.9, 7.9 Hz), 7.20 (1H, s), 7.34-7.45 (7H, m), 7.55 (1H, d, J=7.9 Hz), 7.80 (1H, d, J=1.9 Hz), 8.29 (1H, s). LC-MS (ESI) m/z 457 [M+H]+. Anal. Calcd for C23H19F3N4O3.0.25H2O: C, 59.93; H, 4.26; N, 12.16. Found: C, 59.87; H, 4.09; N, 12.15.

Provenance & Evidence