1-methylsulfonylpyrrolidine

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of pyrrolidine (8.25 g, 116 mmol) in dichloromethane (120 mL) were added triethylamine (19.0 mL, 139 mmol) followed by addition of methanesulfonyl chloride (9.0 mL, 116 mmol) at 0° C. The reaction was allowed to stir while warming up to rt. overnight, which was transferred to a separatory funnel and washed twice with 1.0N HCl and brine once. Organic phase was dried over magnesium sulfate, filtered and solvent was removed to leave a pure title product as a white solid. Step B: 1-(Pyrrolidin-1-ylsulfonyl)propan-2-one overnight, which was transferred to a separatory funnel washed twice with 1.0N HCl and brine once Organic phase was dried over magnesium sulfate filtered solvent was removed