1H-Indazole-5-carbonitrile → 5-(Aminomethyl)-1H-indazole
Reaktionsgleichung
[C:1]([C:3]1[CH:4]=[C:5]2[C:9](=[CH:10][CH:11]=1)[NH:8][N:7]=[CH:6]2)#[N:2]>C1COCC1>[NH2:2][CH2:1][C:3]1[CH:4]=[C:5]2[C:9](=[CH:10][CH:11]=1)[NH:8][N:7]=[CH:6]2Komponenten
3
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
To a solution of LiAl H4 (0.76 g, 20.1 mmol) in THF (10 mL) cooled to 0° C. was added a solution of 5-cyanoindazole (0.64 g, 4.47 mmol) in THF (10 mL) dropwise. After 0.5 h the reaction mixture was warmed to reflux for 2 h, then cooled to 0° C. and quenched by the careful addition of water (0.76 mL), 1.0 N sodium hydroxide (0.76 mL), and water (2.28 mL). This mixture was filtered through a pad of celite and washed with THF/MeOH (3:1, 300 mL). Removal of the solvent in vacuo provided a solid which was purified via flash column chromatography (25×150 mm column; elution with MeOH:CH2Cl2:CH2Cl2 saturated with NH3, 10:60:30). This afforded the title compound as a light yellow solid: