Phenylhydrazine hydrochloride → 3-(1-Methylethyl)-1-phenyl-1H-pyrazol-5-amine
反応式
[CH3:1][CH:2]([CH3:8])[C:3](=O)[CH2:4][C:5]#[N:6].Cl.[C:10]1([NH:16][NH2:17])[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1>CCO>[CH:2]([C:3]1[CH:4]=[C:5]([NH2:6])[N:16]([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=2)[N:17]=1)([CH3:8])[CH3:1]参加物
4
反応条件
- 温度
- 65 °C
実験手順
Using the procedure described in Example 308A Step 1, to a solution of 4-methyl-3-oxopentanenitrile (303 mg, 2.7 mmol) prepared as described in Example 122A Step 1, in anhydrous EtOH (6 ml) was added phenylhydrazine hydrochloride (473 mg, 3.3 mmol) and the reaction mixture was heated at 65° C. overnight. The residue was purified by silica gel chromatography (hexane/ethyl acetate 2-50%) to afford 3-isopropyl-1-phenyl-1H-pyrazol-5-amine (423 mg, 77%) as a solid. 1H NMR (300 MHz, CDCl3) δ 1.22 (d, J=6 Hz, 6H), 3.86 (brs, 2H), 5.35 (s, 1H), 7.21-7.49 (m, 5H); LC-MS (ESI) m/z 202 (M+H)+.