反应详情

TFA (0.02 mL, 0.3 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-cyano-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]piperidin-3-yl}carbamate (5.0 mg, 0.0072 mmol) in DCM (0.009 mL). The reaction mixture was stirred at room temperature for 15 min., then evaporated under reduced pressure. The resulting mixture was diluted with MeOH and neutralized with small amount of NH4OH. After filtration, 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 the title compound (4 mg) as a mixture of two diastereoisomers, which was further purified by chiral preparative LC (Phenomenex Lux® Cellulose-1 column, 21.2×250 mm, 5 μm particle, flow rate 18 mL/min., isocratic eluting with 45% EtOH in hexanes) to give the title compound as two separated diastereoisomers.

1. customevaporated under reduced pressure
2. additionThe resulting mixture was diluted with MeOH and neutralized with small amount of NH4OH
3. filtrationAfter filtration
4. customthe crude product was purified by preparative LC-MS (XBridge™ preparative C18 5 μm 30×10 mm OBD™ column, flow rate 60 mL/min.
5. washeluting with a gradient of MeCN and water with 0.15% NH4OH)