Water → 1-Pyrrolidinecarboxylic acid, 4-cyano-2-(methoxymethyl)-, 1,1-dimethylethyl ester, (2S-cis)-

Participants

Reaction Steps

A solution of (2S,4R)-1-(tert-butoxycarbonyl)-4-methanesulfonyloxy-2-methoxymethylpyrrolidine (3.3 g) and sodium cyanide (1.75 g) in dimethyl sulfoxide (35 ml) was heated for three hours and forty minutes at 92° C. The reaction mixture was poured into a mixture of water (100 ml) and ethyl acetate (100 ml). The organic layer was separated, washed with brine, and dried over magnesium sulfate. Evaporation of the solvent gave an oil, which was chromatographed on silica gel (200 ml) eluting with a mixture of hexane and ethyl (1:1, V/V) to give (2S,4S)-1-(tert-butoxycarbonyl)-4-cyano-2-methoxymethylpyrrolidine (2.5 g).

Provenance & Evidence