2,3,5,6-Tetrafluorophenylhydrazine → 4-iodo-1-(2,3,5,6-tetrafluorophenyl)-1H-pyrazolo[3,4-b]pyridine
反応式
F[C:2]1[N:9]=[CH:8][CH:7]=[C:6]([I:10])[C:3]=1[CH:4]=O.[F:11][C:12]1[C:17]([F:18])=[CH:16][C:15]([F:19])=[C:14]([F:20])[C:13]=1[NH:21][NH2:22]>CN1C(=O)CCC1>[I:10][C:6]1[CH:7]=[CH:8][N:9]=[C:2]2[N:21]([C:13]3[C:14]([F:20])=[C:15]([F:19])[CH:16]=[C:17]([F:18])[C:12]=3[F:11])[N:22]=[CH:4][C:3]=12参加物
4
反応条件
- 温度
- 184 °C
実験手順
To a 15 mL pressure bottle was added 2-fluoro-4-iodonicotinaldehyde (710 mg, 2.83 mmol), (2,3,5,6-tetrafluorophenyl)hydrazine (509 mg, 2.83 mmol), and anhydrous NMP (4 mL). The reaction mixture was flushed with argon, securely capped, and heated at 184° C. for 2.75 h. The reaction mixture was partitioned with ethyl acetate (300 mL), water (125 mL), and brine (50 mL). The organic layer was washed with water (4×40 mL) and brine (75 mL) and the combined aqueous layers were extracted with additional ethyl acetate (300 mL). The second organic layer was washed with water (4×60 mL), and brine (100 mL), and the combined organic layers were dried over sodium sulfate, and evaporated in vacuo to give 1.16 g (quantitative yield) of the title compound as a tan solid. LC/MS (Condition B): ret. T=3.92 min, (M+H)+ 393.89.