Methanesulfonyl chloride → HCID 57947555, compound

Participants

Reaction Steps

To a solution of (S)-tert-butyl 1-(benzyloxy)-3-hydroxypropan-2-ylcarbamate (1.89 g, 6.4 mmol) in DCM (50 mL) was added MsCl (0.55 mL, 7.04 mmol) and DIEA (1.27 mL, 7.68 mmol). The mixture was stirred at RT for 30 min. The mixture was diluted with DCM (300 mL), washed with NaHCO3 and brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The crude product was dissolved in DMF (20 mL). To this DMF solution was added NaN3 (1.25 g, 19.2 mmol) and the mixture was heated to 80° C. for 6 h. LCMS indicated the completion of the reaction. The mixture was cooled to RT, water (20 mL) and EtOAc (200 mL) were added. The organic layer was separated, washed with NaHCO3, brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The rude was purified on silica gel column to give (S)-tert-butyl 1-azido-3-(benzyloxy)propan-2-ylcarbamate (1.5 g, 73% for 2 steps).

Provenance & Evidence