Diisopropylethylamine → N-{4-[(3S,5R)-3-amino-5-(trifluoromethyl)piperidin-1-yl]-2,3-dihydrofuro[2,3-b]pyridin-5-yl}-6-(2,6-difluorophenyl)-5-fluoropyridine-2-carboxamide

To a mixture of 6-(2,6-difluorophenyl)-5-fluoropyridine-2-carboxylic acid (38.7 mg, 0.153 mmol), tert-butyl [(3S,5R)-1-(5-amino-2,3-dihydrofuro[2,3-b]pyridin-4-yl)-5-(trifluoromethyl)piperidin-3-yl]carbamate (51.4 mg, 0.128 mmol) and HATU (178.7 mg, 0.4700 mmol) was added DMF (2.0 mL) followed by DIPEA (159.5 mg, 1.234 mmol). The reaction mixture was stirred at room temperature for 3 h, and then concentrated under reduced pressure. To the resulting residue was added DCM (2.0 mL), followed by TFA (2.0 mL). The mixture was stirred at room temperature for 30 min., and then concentrated under reduced pressure. The resulting residue was purified using RP-HPLC (XBridge™ C18 column, eluting with a gradient of MeCN/water containing 0.1% NH4OH, at flow rate of 30 mL/min.) to afford the title compound as a white solid (13.5 mg, 20%). LCMS calc. for C25H22F6N5O2 (M+H)+: m/z=538.2. found 538.2.

1. concentrationconcentrated under reduced pressure
2. additionTo the resulting residue was added DCM (2.0 mL)
3. stirringThe mixture was stirred at room temperature for 30 min.
4. concentrationconcentrated under reduced pressure
5. customThe resulting residue was purified
6. washeluting with a gradient of MeCN/water containing 0.1% NH4OH, at flow rate of 30 mL/min.)

ORD record

ord-d0e42644ee924e3db25f930646080725

Source dataset

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09200004B2