反应详情

Dess-Martin periodinane (12 mg, 0.028 mmol) was added to a solution of tert-butyl {(3S)-1-[3-({[5-[(tert-butoxycarbonyl)amino]-2-(2,6-difluorophenyl)-1,3-thiazol-4-yl]carbonyl}amino)-7-hydroxy-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]piperidin-3-yl}carbamate (15 mg, 0.022 mmol) in DCM (0.098 mL). The reaction mixture was stirred at room temperature for 1 h. The solution was neutralized with 1 M NaOH, diluted with MeOH and filtered. The mixture was then concentrated under reduced pressure and the crude product was purified by preparative LC-MS (XBridge™ preparative C18 5 μm 30×10 mm OBD™ column, flow rate 60 mL/min., eluting with a gradient of MeCN and water with 0.15% NH4OH) to give sub-title compound as off-white powder (7.5 mg, 50%). LCMS calc. for C33H39F2N6O6S (M+H)+: m/z=685.3. Found: 685.1.

1. filtrationfiltered
2. concentrationThe mixture was then concentrated under reduced pressure
3. customthe crude product was purified by preparative LC-MS (XBridge™ preparative C18 5 μm 30×10 mm OBD™ column, flow rate 60 mL/min.
4. washeluting with a gradient of MeCN and water with 0.15% NH4OH)