反应详情

温度

0 °C

N—((S)-1-(3-(3-chloro-4-cyanophenyl)-1H-pyrazol-1-yl)propan-2-yl)-2-(1-hydroxy-ethyl)thiazole-4-carboxamide (250 mg, 0.601 mmol), 4-dimethylaminopyridine (7.34 mg, 0.060 mmol) and pyridine (3 ml) were added into a flask and the mixture was cooled to 0° C. Acetic anhydride (0.063 ml, 0.661 mmol) was added dropwise and the mixture was allowed to warm to RT with stirring. The reaction was left to react overnight. Next morning more acetic anhydride (10 μl, 0.106 mmol) was added and the reaction was stirred for another hour in RT. The mixture was evaporated and dried overnight in vacuum at 40° C. The product was purified by recrystallization twice from ethanol/heptanes to yield 24.09% of final product. 1H-NMR (400 MHz; DMSO-d6): δ 1.14 (d, 3H), 1.62 (dd, 3H), 2.11 (s, 3H), 4.29-4.53 (m, 3H), 6.02-6.10 (m, 1H), 6.94-6.98 (m, 1H), 7.84-7.87 (m, 1H), 7.92-8.00 (m, 2H), 8.07 (d, 1H), 8.22 (d, 1H), 8.38-4.49 (m, 1H).

1. temperatureto warm to RT
2. waitThe reaction was left
3. customto react overnight
4. stirringthe reaction was stirred for another hour in RT
5. customThe mixture was evaporated
6. customdried overnight in vacuum at 40° C
7. customThe product was purified by recrystallization twice from ethanol/heptanes