Triethylamine → 2(N-methoxy-N-methylcarbamoyl)-3-methansulfonyloxypyrrolidine

Participants

Reaction Conditions

Reaction Steps

Methane sulphonyl chloride (3.49 g) was added dropwise over 10 minutes to a mixture of compound 65 (7.6 g) and triethylamine (7.7 ml) in dichloromethane (350 ml) and cooled to 0° C. under an argon atmosphere. It was then stirred at 0° C. for another hour. The reation mixture was then applied directly to a silica flash column which was eluted with ethyl acetate to give (2S,3 S)-1-tert-butoxycarbonyl)-2(N-methoxy-N-methylcarbamoyl)-3-methansulfonyloxypyrrolidine (compound 66) as a gum (9.7 g).

Provenance & Evidence