1H-Indazole-5-carbonitrile → 5-(Aminomethyl)-1H-indazole
反応式
[H-].[H-].[H-].[H-].[Li+].[Al+3].[C:7]([C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[NH:14][N:13]=[CH:12]2)#[N:8]>C1COCC1>[NH2:8][CH2:7][C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[NH:14][N:13]=[CH:12]2参加物
4
反応条件
- 温度
- 0 °C
実験手順
To a solution-of LiAlH4 (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: