反应详情

A mixture of 3-chlorophthalic anyhydride (0.02 mol) and hydrazine hydrate (0.02 mol) in dry ethanol (50 ml) was heated to reflux in a reaction flask. Reflux continued for several hours until the 3-chlorophthalic anhydride disappeared and a white crystalline solid deposited on the walls of the flask. The solid was filtered and recrystallized from ethanol to yield 5-chloro-2,3-dihydrophthalazine1,4-dione in a yield of 58 percent.

1. temperaturewas heated
2. temperatureto reflux in a reaction flask
3. temperatureReflux
4. filtrationThe solid was filtered
5. customrecrystallized from ethanol