Hydrazine hydrate (1:1) → 6,7-Dimethoxy-1,2-dihydrophthalazin-1-one

Beteiligte Stoffe

Reaktionsschritte

4,5-Dimethoxyphthalaldehydic acid (10 g.) and hydrazine hydrate (2.4 ml.) in ethanol (150 ml.) were heated under reflux for 20 hours during which time a white crystalline solid formed. The mixture was cooled in an ice bath, filtered and the resulting product dried to give crude 6,7-dimethoxyphthalazin-1-one (7 g.). A sample was crystallized from water yielding colorless needles, m.p. 254°-256° C.

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