Phenylhydrazine → 2-(2-Phenylhydrazono)malonic acid

HRID 1416107

Reaktionsgleichung

Reaktionsgleichung von HRID 1416107
O.O=[C:3]([C:7]([OH:9])=[O:8])[C:4]([OH:6])=[O:5].[C:10]1([NH:16][NH2:17])[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1>C(O)C.O>[C:10]1([NH:16][N:17]=[C:3]([C:7]([OH:9])=[O:8])[C:4]([OH:6])=[O:5])[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Komponenten

5

Edukt 2

HCID 7516PhenylhydrazineHCID 20057180Ketomalonic acid hydrate

Produkt 1

HCID 5486342-(2-Phenylhydrazono)malonic acidAusbeute 94,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 702EthanolLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

To a vigorously stirred solution of ketomalonic acid monohydrate (29.33 g) in ethanol (140 ml) and water (300 ml) at ambient temperature was added phenylhydrazine (23.3 g) dropwise over a 40 minute period. The resultant slurry was stirred overnight at ambient temperature. The solid was separated by filtration, washed sucessively with cold water (100 ml) and ethanol (25 ml) and air dried. Subsequent drying was performed at 75° C. overnight in a vacuum oven to give the title compound as a yellow solid (42.38 g). 1H (300 MHz, DMSO-d6): d 7.12(t, 1H), 7.35-7.48(m, 4H); m.p.: 155-157° C. (dec).

Aufarbeitung

  1. customThe solid was separated by filtration
  2. washwashed sucessively with cold water (100 ml) and ethanol (25 ml) and air
  3. customdried
  4. customSubsequent drying
  5. waitwas performed at 75° C. overnight in a vacuum oven

Quellen und Nachweise

ORD-Eintrag
ord-f5a07a0fb14e4af69cbcf50d1e4bc63c
Quelldatensatz
uspto-grants-1999_06
Patentnummer
US05910495

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