Hydrazine hydrate (1:1) → 3-Amino-5-(4-methoxyphenyl)pyrazole

HRID 1695206

Reaktionsgleichung

Reaktionsgleichung von HRID 1695206
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9](=O)[CH2:10][C:11]#[N:12])=[CH:5][CH:4]=1.O.[NH2:15][NH2:16]>C(O)C>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[NH:16][N:15]=[C:11]([NH2:12])[CH:10]=2)=[CH:5][CH:4]=1

Komponenten

4

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 2333984-Methoxybenzoylacetonitrile

Produkt 1

HCID 27564693-Amino-5-(4-methoxyphenyl)pyrazoleAusbeute 88 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

A suspension of 3-(4-methoxyphenyl)-3-oxopropanenitrile in ethanol was heated to 60° C. Hydrazine hydrate was added dropwise over a minimum of 30 min at 60° C. The resulting solution was held at 60° C. until reaction completion, generally 15-18 hr. The reaction mixture was quenched with water. Ethanol was removed by distillation to about 5 volumes. The product was isolated by filtration, washed with water and dried in a vacuum oven. The yield was 88-95%.

Aufarbeitung

  1. customThe resulting solution was held at 60° C. until reaction completion, generally 15-18 hr
  2. customThe reaction mixture was quenched with water
  3. customEthanol was removed by distillation to about 5 volumes
  4. customThe product was isolated by filtration
  5. washwashed with water
  6. customdried in a vacuum oven

Quellen und Nachweise

ORD-Eintrag
ord-b9cb9cc2d0f24b9d84b3837a460eacaf
Quelldatensatz
uspto-grants-2012_04
Patentnummer
US08163729B2

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