Methyl acetoacetate → HCID 178463089, Verbindung

HRID 47628Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 47628
C(O)(=O)C(O)=O.[CH2:7]([NH:9][NH2:10])[CH3:8].C(N(CC)CC)C.[C:18](OC)(=[O:23])[CH2:19][C:20]([CH3:22])=O>C1(C)C=CC=CC=1>[CH2:7]([N:9]1[C:18]([OH:23])=[CH:19][C:20]([CH3:22])=[N:10]1)[CH3:8]

Komponenten

5

Edukt 3

HCID 7757Methyl acetoacetateHCID 8471TriethylamineHCID 96181Hydrazine, ethyl-, ethanedioate (1:1)

Produkt 1

HCID 178463089HCID 178463089, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

A suspension of 23 g of ethyl hydrazine oxalate and 22 ml of triethylamine in 500 ml of toluene was stirred at room temperature for 15 minutes. 17 ml of methyl acetoacetate was added and the mixture was azeotroped for 1.5 hours. The mixture was evaporated and the residue was purified by flash chromatography on silica gel using dichloromethane/methanol (97:3) for the elution to give 19 g of 2-ethyl-5-methyl-2H-pyrazol-3-ol as an orange solid.

Aufarbeitung

  1. customthe mixture was azeotroped for 1.5 hours
  2. customThe mixture was evaporated
  3. customthe residue was purified by flash chromatography on silica gel
  4. washfor the elution

Quellen und Nachweise

ORD-Eintrag
ord-3e722a6946a544cca7bd5c0d21f6cef4
Quelldatensatz
uspto-grants-2004_03
Patentnummer
US06699887B2

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