Water → 1-cyclobutyl-5-hydroxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one

Participants

Reaction Steps

To a solution of sodium iodide (2.11 g) in acetonitrile (84.3 mL) was added at room temperature chlorotrimethylsilane (1.78 mL) and the mixture was stirred for 30 min. Then, 1-cyclobutyl-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (0.91 g) was added, and the mixture was stirred at room temperature for 30 min, and further refluxed for 3 hr. The reaction mixture was allowed to cool to room temperature, water was added, and the mixture was stirred for 30 min, and extracted with ethyl acetate. The organic layer was washed with aqueous sodium thiosulfate solution and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was triturated with diisopropyl ether, and collected by filtration to give the title compound (800 mg).

Provenance & Evidence