Reaction of 1‐hydrazinophthalazine (I) with acetylacetone (IIa) or ethyl acetoacetate (IIb) yields a mixture of the hydroxypyrazolines (III) and the azines (IV).
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ChemInform Abstract: Some Novel Observations on the Reaction of 1‐Hydrazinophthalazine with Polycarbonyl Compounds