反应详情

A mixture of (3R,4R,5S)-1-[7-(acetyloxy)-3-amino-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]-3-[(tert-butoxycarbonyl)amino]-5-methylpiperidin-4-yl acetate (11.0 mg, 0.024 mmol), 3-[(tert-butoxycarbonyl)amino]-6-(2,6-difluorophenyl)-5-fluoropyridine-2-carboxylic acid (12 mg, 0.03 mmol), HATU (33 mg, 0.09 mmol) in DMF (0.09 mL) and DIPEA (23 mg, 0.18 mmol) was stirred at room temperature for 16 h. The reaction mixture was diluted with 1N NaOH solution (0.5 mL) and MeOH (0.5 mL). The reaction mixture was stirred at room temperature for 1 h. After concentration under vacuum, the aqueous layer was extracted with DCM three times. The combined organic layers were dried, filtered and concentrated under reduced pressure to give the crude product, which was 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 the sub-title compound as a white powder. LCMS calc. for C36H44F3N6O7 (M+H)+: m/z=729.3. Found: 729.4.

1. stirringThe reaction mixture was stirred at room temperature for 1 h
2. concentrationAfter concentration under vacuum
3. extractionthe aqueous layer was extracted with DCM three times
4. customThe combined organic layers were dried
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customto give the crude product, which
8. customwas purified by preparative LC-MS (XBridge™ preparative C18 5 μm OBD™ column, 30×10 mm, 60 mL/min.
9. washeluting with a gradient of MeCN and water with 0.1% NH4OH)