Hydrazine, (phenylmethyl)-, hydrochloride (1:1) → 2-Benzyl-6-phenyl-4,5-dihydropyridazin-3(2H)-one

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Reaction Steps

To a solution of 4-oxo-4-phenylbutanoic acid (1.0 g) in ethanol (28 mL) were added benzylhydrazine hydrochloride (1.1 g) and sodium acetate (4.2 g) at room temperature, and the mixture was heated under reflux overnight. The solvent was evaporated under reduced pressure, saturated aqueous sodium hydrogen carbonate solution was added, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the title compound (0.18 g).

Provenance & Evidence