反应详情

温度

0 °C

Into a 0° C. solution containing sodium tetrahydroborate (0.022 g, 0.580 mmol) dissolved in ethanol (1 ml), (S)-3-acetyl-N-(1-(4-chloro-3-(3-chloro-4-cyanophenyl)-1H-pyrazol-1-yl)propan-2-yl)-1H-pyrazole-5-carboxamide (0.125 g, 0.290 mmol) of Example 224 dissolved in 2 ml of ethanol was added slowly. The mixture was stirred at 0° C. for a few minutes after which the mixture was allowed to warm to RT and the stirring was continued for 4.5 h. A few drops of water was added slowly. The pH was adjusted below 4 with 2 M HCl. The solvent was evaporated and the residue extracted with DCM/water. Organic phase was isolated with phase separator and evaporated. The product was purified by recrystallization from ethanol. Yield 51.0%. 1H-NMR (400 MHz; DMSO-d6): δ 1.14 (d, 3H), 1.38 (d, 3H), 4.23-4.37 (m, 2H), 4.40-4.50 (m, 1H), 4.75-4.83 (m, 1H), 5.40 (d, 1H), 6.40 (s, 1H), 8.00 (dd, 1H), 8.04 (dd, 1H), 8.05-8.14 (m, 3H), 13.03 (s, 1H).

1. additionwas added slowly
2. temperatureto warm to RT
3. customThe solvent was evaporated
4. extractionthe residue extracted with DCM/water
5. customOrganic phase was isolated with phase separator
6. customevaporated
7. customThe product was purified by recrystallization from ethanol