反应详情

温度

55 °C

To a solution of 2-tert-butylamino-6-chloro-nicotinamide (3, 850 mg, 3.73 mmol) in acetonitrile (anhydrous, 40 mL) were added pyridine (2.42 mL, 29.9 mmol) and POCl3 (1.37 mL, 14.9 mmol). The reaction was heated at 55° C. for 3 hours. After cooling to room temperature, NaOH solution (10% aq.) was slowly added till pH 9. The solution was extracted with EtOAc (3×50 mL). The combined organic layer was dried over MgSO4, filtered, and concentrated in vacuo. Purification was accomplished by Biotage silica gel chromatography, eluting with 2%-30% EtOAc/hexanes gradient, to afford 630 mg (80% yield) of the title product.

1. temperatureAfter cooling to room temperature
2. extractionThe solution was extracted with EtOAc (3×50 mL)
3. dry with materialThe combined organic layer was dried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification
7. washeluting with 2%-30% EtOAc/hexanes gradient