Trifluoroacetic acid → 5-methoxy-1-[2-methoxy-4-(1H-pyrazol-1-yl)phenyl]-3-{1-[3-(trifluoromethyl)phenyl]-1H-pyrazol-5-yl}pyridazin-4(1H)-one

Participants

Reaction Steps

To a suspension of 3-[3-(dimethylamino)prop-2-enoyl]-5-methoxy-1-[2-methoxy-4-(1H-pyrazol-1-yl)phenyl]pyridazin-4(1H)-one (136 mg) in ethanol (1.5 mL) was added dropwise a solution of 3-(trifluoromethyl)phenylhydrazine (0.049 mL) and TFA (0.15 mL) in ethanol (1.5 mL), and the mixture was stirred at room temperature for 3 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (NH, ethyl acetate), and recrystallized from ethanol/water to give the title compound (123 mg).

Provenance & Evidence