Hydrazine hydrate (1:1) → HCID 21450278, compound

Participants

Reaction Steps

Hydrazine hydrate (4.5 ml, 0.09 mole) was added to a stirred solution of methyl 3-(4-allyl-3-hydroxybenzoyl)propionate (5.6 g, 0.023 mole) in glacial acetic acid (60 ml) and the mixture heated under reflux for one hour. Evaporation under reduced pressure gave a residue which was triturated with water to give 6-(4-allyl-3-hydroxyphenyl)-4,5-dihydro-3(2H)-pyridazinone (5 g, m.p. 175°-178°C, 96%). The pure pyridazinone, recrystallised from ethanol had m.p. 178°-180°C.

Provenance & Evidence