Potassium Carbonate → HCID 72550059, compound

Participants

Reaction Steps

To a round-bottomed flask was added tert-butyl (3R,4S,5S)-1-(3-aminopyridin-4-yl)-4-(4-(hydroxymethyl)-1H-1,2,3-triazol-1-yl)-5-methylpiperidin-3-ylcarbamate (1.0 equiv.) and BSA (2.5 equiv.) in Acetonitrile/DMF (4/1, 0.05 M) to give a orange suspension. The mixture was stirred at room temperature for 1 hr at which time all of the solids had dissolved into solution. The mixture was taken to dryness. The crude in DMF (0.10 M) was added EDCI (2.4 equiv.), HOAT (2.4 equiv.) and 6-(2,6-difluorophenyl)-5-fluoropicolinic acid (2.4 equiv.). The mixture was stirred at rt for 16 hrs. The reaction was taken to dryness and dissolved in EtOAc and cooled to 0° C. to precipitate the urea byproduct. The mixture was filtered and the organics were washed with H2O, dried over MgSO4, filtered and concentrated. To a solution of the residue in EtOH (0.01 M) was added potassium carbonate (10.0 equiv.). The mixture was stirred at room temperature for 2 hrs. The reaction was diluted with DCM and quenched with NaHCO3(aq.). The organics were separated and the aqueous solution was extracted with DCM. The combined organics were dried over MgSO4, filtered, and concentrated. The crude alcohol was then dissolved in 25% TFA/DCM. The solution was stirred at room temp for 1 hr. The volatiles were removed on the rotovap. The crude product was taken up in DMSO, filtered, purified via prep-HPLC to yield N-(4-((3R,4S,5S)-3-amino-4-(4-(hydroxymethyl)-1H-1,2,3-triazol-1-yl)-5-methylpiperidin-1-yl)pyridin-3-yl)-6-(2,6-difluorophenyl)-5-fluoropicolinamide in 69% yield. LC/MS (m/z)=539.3 (MH+), Rt=0.57 min.

Provenance & Evidence