反应详情

A mixture of 4-{(3S)-3-[(tert-butoxycarbonyl)amino]piperidin-1-yl}-3-({[6-(2,6-difluoro-3-methoxyphenyl)-5-fluoropyridin-2-yl]carbonyl}amino)-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate (5.0 mg, 0.008 mmol), MeOH (90 μL), THF (45 μL) and 1.0 M aq. NaOH (50 μL, 0.050 mmol) was stirred at room temperature for 20 min. The solvents were removed under reduced pressure to give the crude intermediate, which was dissolved in DCM (0.08 mL), followed by the addition of TFA (0.078 mL, 1.0 mmol). The reaction mixture was stirred at room temperature for 20 min. After concentrating the solution under reduced pressure, the residue was diluted with MeOH, filtered and purified by preparative LC-MS (XBridge™ preparative C18 5 μm OBD™ column, 30×10 mm, 60 mL/min., eluting with a gradient of MeCN and water with 0.1% NH4OH) to give both diastereoisomers of the title compound as white powders.

1. customThe solvents were removed under reduced pressure
2. customto give the crude intermediate, which
3. stirringThe reaction mixture was stirred at room temperature for 20 min
4. concentrationAfter concentrating the solution under reduced pressure
5. additionthe residue was diluted with MeOH
6. filtrationfiltered
7. custompurified by preparative LC-MS (XBridge™ preparative C18 5 μm OBD™ column, 30×10 mm, 60 mL/min.
8. washeluting with a gradient of MeCN and water with 0.1% NH4OH)