Hydrazine hydrate (1:1) → HCID 54358025, compound

Participants

Reaction Conditions

Reaction Steps

1.10 g (0.0220 mole) of hydrazine hydrate was added to a solution of 4.50 g (0.0191 mole) of methyl 1-butenyl-3-formyl-4,5-dimethylpyrrole-2-carboxylate (cis/trans=24/76) in 47 ml of acetic acid and the resulting mixture was stirred at 100° C. for 2 hours. The reaction mixture cooled to room temperature was poured into ice-water. Precipitated crystals were collected by filtration and washed with water. The crystals thus obtained were dissolved in 300 ml of dichloromethane and the solution was dried over anhydrous sodium sulfate. Distilling off the solvent gave 3.53 g (0.0163 mole) of 1-(2-butenyl)-2,3-dimethyl-6,7-dihydropyrrolo[2,3-d]-pyridazine-7-one (cis/trans=21/79) as pale brown crystals.

Provenance & Evidence