Hydrazine hydrate (1:1) → 1(2H)-Phthalazinone

HRID 839496Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 839496
Br[CH:2](Br)[C:3]1[C:4]([C:9]([OH:11])=O)=[CH:5][CH:6]=[CH:7][CH:8]=1.O.[NH2:14][NH2:15]>C(O)C>[C:9]1(=[O:11])[C:4]2[C:3](=[CH:8][CH:7]=[CH:6][CH:5]=2)[CH:2]=[N:15][NH:14]1

Komponenten

4

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 3455532-(dibromomethyl)benzoic acid

Produkt 1

HCID 83941(2H)-PhthalazinoneAusbeute 88 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

A solution of 29.4 g (0.1 mole) of α,α-dibromo-o-toluic acid and 16 g (0.32 mole) of hydrazine hydrate in 200 ml of ethanol was heated under reflux with stirring for 1 hour. The solvent was evaporated under reduced pressure, and the residue recrystallized from ethanol to give 12.8 g (yield: 88%) of 1-phthalazinone having a melting point of 181°-182° C.

Aufarbeitung

  1. temperatureunder reflux
  2. customThe solvent was evaporated under reduced pressure
  3. customthe residue recrystallized from ethanol

Quellen und Nachweise

ORD-Eintrag
ord-42ff49d6f9494d9f98551c75957ce1a5
Quelldatensatz
uspto-grants-1978_06
Patentnummer
US04096143

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