Sodium → methyl 5-amino-1-methyl-1H-pyrazole-3-carboxylate
Reaktionsgleichung
[Na].[NH2:2][C:3]1[N:7]([CH3:8])[N:6]=[C:5]([C:9]([O:11][CH2:12]C)=[O:10])[CH:4]=1>CO>[NH2:2][C:3]1[N:7]([CH3:8])[N:6]=[C:5]([C:9]([O:11][CH3:12])=[O:10])[CH:4]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a solution of 48 mg (2.1 mmol) of sodium in 40 ml of methanol is added 2.0 mg (11.8 mmol) of 5-amino-3-ethoxycarbonyl-1-methylpyrazole, and the mixture is refluxed over night, and distilled under reduced pressure. To the resulting residue are added a small amount of water and sodium chloride, and the mixture is extracted 6 times with chloroform. The extract is dried with magnesium sulfate, chromatographed on a column of silica gel and eluted with ethyl acetate to give 1.37 g (74.1% yield) of the objective compound.
Aufarbeitung
- temperaturethe mixture is refluxed over night
- distillationdistilled under reduced pressure
- additionTo the resulting residue are added a small amount of water and sodium chloride
- extractionthe mixture is extracted 6 times with chloroform
- dry with materialThe extract is dried with magnesium sulfate
- customchromatographed on a column of silica gel
- washeluted with ethyl acetate
Quellen und Nachweise
- ORD-Eintrag
- ord-2acea9e5ebbe4025b45c98ee01e9c12d
- Quelldatensatz
- uspto-grants-1989_10
- Patentnummer
- US04873334
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