Hydrazine hydrate (1:1) → 6-(4-Fluorophenyl)-4,5-dihydro-3(2H)-pyridazinone

HRID 49394Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 49394
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=O)[CH2:9][CH2:10][C:11]([OH:13])=O)=[CH:4][CH:3]=1.O.[NH2:16][NH2:17]>C(O)C>[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH2:9][CH2:10][C:11](=[O:13])[NH:16][N:17]=2)=[CH:4][CH:3]=1

Komponenten

4

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 1013593-(4-Fluorobenzoyl)propionic acid

Produkt 1

HCID 6058786-(4-Fluorophenyl)-4,5-dihydro-3(2H)-pyridazinoneAusbeute 86 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

In a round-bottomed flask, 4-(4-fluoro-phenyl)-4-oxo-butyric acid (4.90 g, 25.0 mmol) and hydrazine hydrate (1.70 ml, 35.0 mmol) were dissolved in ethanol (50 ml), and the reaction mixture was heated to about 80° C. for about ninety minutes. The mixture was allowed to cool to room temperature and then concentrated in vacuo. The resulting solids were suspended and stirred in ethanol (10 ml) for ten minutes and the mixture was then filtered to give pure product (4.14 g, 21.5 mmol, 86% yield). LRMS ([M+H]+)=193.2; m.p. 191-193° C.

Aufarbeitung

  1. temperatureto cool to room temperature
  2. concentrationconcentrated in vacuo
  3. filtrationthe mixture was then filtered

Quellen und Nachweise

ORD-Eintrag
ord-63af00af25dc450f9038d63a2aa45ae1
Quelldatensatz
uspto-grants-2004_03
Patentnummer
US06706743B2

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