反应详情

A 50 mL round bottom flask with a magnetic stirrer and reflux condenser was charged with 3-(5-acetyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one 108d (250 mg, 0.7 mmol), aqueous NaOH (5N, 6 mL), ethanol (6 mL). The mixture stirred at reflux for 30 min. After this time, ethyl acetate (5 mL) and water (5 mL) were added. The separated aqueous layer was extracted with ethyl acetate (2×5 mL). The combined organics were washed with brine (10 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to afford a 91% yield (200 mg) of crude 5-bromo-1-methyl-3-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)pyridin-2(1H)-one (126a).

1. temperatureA 50 mL round bottom flask with a magnetic stirrer and reflux condenser
2. temperatureat reflux for 30 min
3. extractionThe separated aqueous layer was extracted with ethyl acetate (2×5 mL)
4. washThe combined organics were washed with brine (10 mL)
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure