Diisopropylethylamine → 4,6-bis-((3R,5S)-3,5-bis-(tert-Butoxycarbonylamino)-piperidin-1-yl)-3,5-dichloro-2-(4-acetylamino-phenyl-amino)-pyridine

Participants

Reaction Conditions

Reaction Steps

4-((3R,5S)-3,5-bis-(tert-butoxycarbonylamino)-piperidin-1-yl)-3,5-dichloro-2-(4-acetylamino-phenyl-amino)-6-fluoro-pyridine (165) (0.29 g, 0.463 mmol) and cis-3,5-bis-(tert-butoxycarbonylamino)-piperidine (4) (0.219 g, 0.695 mmol) were combined and suspended in NMP (3.5 mL) in a 40 mL I-Chem vial. iPr2EtN (0.926 mmol) was added and the mixture was sonicated for 2 minutes. The mixture was heated to 110° C. and within 30 minutes all of the solids had dissolved. The solution continued to shake in the Teflon septum capped vial for 5 days. LC-MS indicated nearly complete reaction at this point. The solution was diluted with EtOAc (100 mL), washed with H2O (50 mL) and brine (50 mL), dried over MgSO4 and concentrated to give a brown oil which eventually solidified. Trituration of the solid with EtOAc followed by collection via filtration under reduced pressure gave the desired product (166) as a beige powder (0.183 g, 0.198 mmol, 43% yield). LC-MS (ESI): (exact mass: 921.43) m/e=922.6 [M+1]+.

Provenance & Evidence