Water → 1-(tert-Butoxycarbonyl)-4-(methanesulfonyloxy)piperidine

Participants

Reaction Steps

To N-Boc-4-hydroxypiperidine (2200 g, 10.95 mol) in anhydrous DCM (8 L) was added triethylamine (2284 mL, 16.42 mol) in one portion at 0° C., then MsCl (1316 g, 11.49 mol) was added drop wise into the mixture at 0° C. The mixture was stirred at room temperature for 2 h. Water (2 L) was added to the mixture and the organic phase was separated, and then the organic phase was washed with 1 M hydrochloride solution (4 L), saturated NaHCO3 solution (4 L), brine (1 L), and dried over anhydrous Na2SO4. The organic layer was concentrated to afford tert-butyl 4-[(methylsulfonyl)oxy]piperidine-1-carboxylate, which was used for the next step without further purification.

Provenance & Evidence