反应详情

10 g commercially available dichlorophthalazine are added portionwise at 90° C. to a solution of 50 ml ethanol and 20 ml hydrazine hydrate. After 10 min the reaction mixture is cooled to ambient temperature, the precipitate is filtered with suction and rinsed with ethanol to yield 8.4 g of the title compound.

1. filtrationthe precipitate is filtered with suction
2. washrinsed with ethanol