Methanesulfonyl chloride → HCID 54252157, compound

Participants

Reaction Steps

(S)-1-(tert-Butoxycarbonylamino)-3-hydroxypyrrolidine (40 g, 0.21 mol) was dissolved in anhydrous methylene chloride (400 mL), in the presence of N,N-diisopropyl-ethylamine (73 mL, 0.42 mol, 2 equiv.) and cooled using an ice bath. This solution was treated with methanesulfonyl chloride (18 mL, 0.23 mol, 1.1 equiv.) over a 30 min. period and was then allowed to stir at room temperature for 4 h. The solution was concentrated and the residue dissolved in ethyl acetate (250 mL). The resulting organic solution washed with 5% NaHCO3 and then with brine. The organic extract was dried over magnesium sulfate, filtered and concentrated to give (S)-1-(tert-butoxycarbonyl-amino)-3-methanesulfonyloxypyrrolidine as a dark oil (39 g) which was used directly without further purification.

Provenance & Evidence