反应详情

温度

25 °C

To a suspension of (S)—N6-(5-cyclopropyl-1H-pyrazol-3-yl)-N2-(1-(4-fluorophenyl)ethyl)-3-nitropyridine-2,6-diamine (Example 26; 0.40 g, 1.05 mmol) and zinc dust (0.342 g, 5.23 mmol) in MeOH-THF (1:1, 16 ml) was slowly added a saturated aqueous ammonium chloride solution (2.5 ml). The mixture was stirred at 25° C. for 1 hr, then treated with saturated ammonium acetate solution (4 ml). The resulting mixture was stirred for another 30 min. The Zn dust was removed by filtration and the cake was washed with EtOAc (20 ml). The organic layer was separated, washed with brine (10 ml), and dried over Na2SO4. Removal of the solvent gave the title compound at quantitative yield. 1H NMR (400 MHz) δ 11.5 (br, 1H), 7.98 (br, 1H), 7.43 (m, 2H), 7.07 (m, 2H), 6.67 (d, J=8 Hz, 1H), 6.09 (s, 1H), 5.63-5.70 (m, 2H), 5.19 (m, 1H), 4.04 (br, 2H), 1.77 (m, 1H), 1.46 (d, J=6.8 Hz, 3H), 0.85 (m, 2H), 0.59 (m, 2H). MS: Calcd.: 352. Found: [M+H]+ 353.

1. stirringThe resulting mixture was stirred for another 30 min
2. customThe Zn dust was removed by filtration
3. washthe cake was washed with EtOAc (20 ml)
4. customThe organic layer was separated
5. washwashed with brine (10 ml)
6. dry with materialdried over Na2SO4
7. customRemoval of the solvent