反应详情

温度

25 °C

To a suspension of (S)-N4-(5-cyclopropyl-1H-pyrazol-3-yl)-N2-(1-(4-fluorophenyl)ethyl)-5-nitropyridine-2,4-diamine (Method 89, 0.15 g, 0.40 mmol) and zinc dust (0.13 g, 2.0 mmol) in MeOH-THF (1:1, 16 ml) was slowly added saturated ammonium chloride solution (2 ml). The reaction mixture was stirred at 25° C. for 1 hour, to which was added saturated ammonium acetate solution (5 ml). The resulting mixture was stirred for another 30 min. Zn dust was removed by filtration and washed with EtOAc (20 ml). The organic layer was separated, washed with brine (10 ml), dried over Na2SO4, and concentrated. The crude product was used directly for the next step without further purification. MS: Calcd.: 352; Found: [M+H]+ 353.

1. stirringThe resulting mixture was stirred for another 30 min
2. customZn dust was removed by filtration
3. washwashed with EtOAc (20 ml)
4. customThe organic layer was separated
5. washwashed with brine (10 ml)
6. dry with materialdried over Na2SO4
7. concentrationconcentrated
8. customThe crude product was used directly for the next step without further purification