Sodium Chloride → (2S, 4S)-1-t-Butoxycarbonyl-2-ethylcarbamoyl-4-methanesulfonyloxypyrrolidine

関与物質

反応手順

13.81 ml of triethylamine and subsequently 7.65 ml of methanesulfonyl chloride were added, whilst ice-cooling, to a solution of 23.20 g of (2S, 4S)-1-t-butoxycarbonyl-2-ethylcarbamoyl-4-hydroxypyrrolidine dissolved in 250 ml of dry tetrahydrofuran, and then the mixture was stirred at 0° to 5° C. for 30 minutes. The reaction mixture was then poured into an aqueous solution of sodium chloride and extracted with ethyl acetate. The extract was washed with an aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate. The solvent was then removed by distillation under reduced pressure, to afford 26.54 g of the title compound as colorless crystals, melting at 138°-140° C.

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