反应详情

A mixture of tert-butyl ((3R,4R,5S)-1-(5-amino-2,3-dihydrofuro[2,3-b]pyridin-4-yl)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methylpiperidin-3-yl)carbamate (200 mg, 0.418 mmol), 6-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-5-fluoropyridine-2-carboxylic acid (130 mg, 0.418 mmol), HATU (318 mg, 0.836 mmol) in DMF (1.5 mL) and DIPEA (218 μL, 1.25 mmol) was stirred at room temperature for 2 h. After quenched with water, the mixture was extracted with EtOAc (2×). The combined organic phases were washed with brine, dried over Na2SO4, and concentrated. The residue was purified by purified by column chromatography on silica gel using CombiFlash® apparatus eluting with EtOAc/hexanes (50-100%), to yield an amide intermediate, tert-butyl ((3R,4R,5S)-4-{[tert-butyl(dimethyl)silyl]oxy}-1-{5-[({6-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-5-fluoropyridin-2-yl}carbonyl)amino]-2,3-dihydrofuro[2,3-b]pyridin-4-yl}-5-methylpiperidin-3-yl)carbamate.

1. customAfter quenched with water
2. extractionthe mixture was extracted with EtOAc (2×)
3. washThe combined organic phases were washed with brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated
6. customThe residue was purified
7. customby purified by column chromatography on silica gel using CombiFlash® apparatus
8. washeluting with EtOAc/hexanes (50-100%)