反应详情

To a stirring suspension of N-(5-chloropyridin-2-yl)-5-iodo-2-[(4-piperidinylcarbonyl)amino]benzamide trifluoroacetate (1.5 g, 2.52 mmol) in methanol (25 mL) was added ac tone (25 mL), followed by acetic acid (0.6 mL, 10 mmol), and then sodium cyanoborohydride (0.67 g, 10 mmol). After stirring overnight, the solution was treated with saturated aqueous ammonium acetate solution, concentrated, and partitioned between dichloromethane and saturated aqueous sodium bicarbonate. The organic phase was washed with brine, dried over magnesium sulfate, filtered, and concentrated. The crude product was purified by chromatography over silica gel, eluting with a step gradient of 5-15% 2 M solution of ammonia/methanol in dichloromethane. The chromatography product was slurried in diethyl ether and filtered to give 0.87 g (65%) of a white solid.

1. additionwas added ac tone (25 mL)
2. concentrationconcentrated
3. custompartitioned between dichloromethane and saturated aqueous sodium bicarbonate
4. washThe organic phase was washed with brine
5. dry with materialdried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product was purified by chromatography over silica gel
9. washeluting with a step gradient of 5-15% 2 M solution of ammonia/methanol in dichloromethane
10. filtrationfiltered