2-Hydrazinoethanol → 5-amino-1-(2-hydroxyethyl)-1H-pyrazole-4-carbonitrile
Reaktionsgleichung
C(O[CH:4]=[C:5]([C:8]#[N:9])[C:6]#[N:7])C.[NH:10]([CH2:12][CH2:13][OH:14])[NH2:11]>C(O)C>[NH2:9][C:8]1[N:10]([CH2:12][CH2:13][OH:14])[N:11]=[CH:4][C:5]=1[C:6]#[N:7]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 95 °C
Versuchsvorschrift
A 100-mL round-bottom flask was charged with 2-(ethoxymethylene)malononitrile (4.88 g, 39.96 mmol), ethanol (50 mL) and 2-hydrazinylethan-1-ol (4.4 g, 57.82 mmol). The resulting solution stirred for 10 h at 95° C. After cooling to room temperature, the reaction mixture was concentrated under vacuum. The residue was purified via column chromatography on silica gel (eluting with 9:1, dichloromethane/methanol) to afford 5-amino-1-(2-hydroxyethyl)-1H-pyrazole-4-carbonitrile (3.9 g, 63%) as a yellow solid. MS (ESI, pos. ion) m/z 153 [M+H]+.