Methanesulfonyl chloride → (3R,4R,5S)-1-(3-(bis(tert-butoxycarbonyl)amino)pyridin-4-yl)-3-((tert-butoxycarbonyl)amino)-5-methylpiperidin-4-yl methanesulfonate

Participants

Reaction Steps

To a solution of tert-butyl tert-butoxycarbonyl(4-((3R,4R,5S)-3-((tert-butoxycarbonyl)amino)-4-hydroxy-5-methylpiperidin-1-yl)pyridin-3-yl)carbamate (1.0 equiv.) in DCM (0.20 M) was added TEA (1.7 equiv.), followed by MsCl (1.3 equiv.). The capped solution was stirred at rt for 90 mins. The reaction mixture was quenched with NaHCO3(sat.), and extracted with EtOAc. The organic layer was washed with NaCl(sat.), dried over MgSO4, filtered, concentrated to yield (3R,4R,5S)-1-(3-(bis(tert-butoxycarbonyl)amino)pyridin-4-yl)-3-((tert-butoxycarbonyl)amino)-5-methylpiperidin-4-yl methanesulfonate in 99% yield. LC/MS (m/z)=601.3 (MH+), Rt=0.83 min.

Provenance & Evidence