Diisopropylethylamine → 4-{(3S,5R)-3-[(tert-butoxycarbonyl)amino]-5-methylpiperidin-1-yl}-3-[({6-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-5-fluoropyridin-2-yl}carbonyl)amino]-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate

Participants

Reaction Steps

A mixture of 3-amino-4-{(3S,5R)-3-[(tert-butoxycarbonyl)amino]-5-methylpiperidin-1-yl}-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate (299 mg, 0.739 mmol), 6-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-5-fluoropyridine-2-carboxylic acid (230 mg, 0.739 mmol) and HATU (562 mg, 1.48 mmol) in DMF (0.7 mL) and DIPEA (0.386 mL, 2.22 mmol) was stirred at room temperature for 2 h. The reaction mixture was quenched with water, the mixture was extracted with EtOAc (2 times). The combined organic phases were washed with brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by purified by column chromatography on silica gel using CombiFlash® apparatus eluting with EtOAc/hexanes (50-100%) to give an amide intermediate, 4-{(3S,5R)-3-[(tert-butoxycarbonyl)amino]-5-methylpiperidin-1-yl}-3-[({6-[2,6-difluoro-4-(1-hydroxy-1-methylethyl)phenyl]-5-fluoropyridin-2-yl}carbonyl)amino]-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl acetate.

Provenance & Evidence