Ethanol, reaction products with ammonia, distn. residues → 2-(2-Ethyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)propan-1-amine
反応式
[CH2:1]([C:3]1[C:14]([CH:15]([CH3:18])[C:16]#[N:17])=[C:6]2[C:7]3[CH2:13][CH2:12][O:11][C:8]=3[CH:9]=[CH:10][N:5]2[N:4]=1)[CH3:2].N.C(O)C>[Co]>[CH2:1]([C:3]1[C:14]([CH:15]([CH3:18])[CH2:16][NH2:17])=[C:6]2[C:7]3[CH2:13][CH2:12][O:11][C:8]=3[CH:9]=[CH:10][N:5]2[N:4]=1)[CH3:2]参加物
4
実験手順
A mixture of 2-(2-ethyl-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl)propanenitrile (185 mg, 0.767 mmol), Raney cobalt (1.9 g) and 2M ammonia/ethanol solution (15 mL) was stirred at room temperature for 12 hr under a hydrogen atmosphere, and further stirred at 40° C. for 3 hr. The catalyst was filtered through celite, and the filtrate was concentrated under reduced pressure to give the title compound (185 mg, yield 98%).