methanesulfonate 、
(2S,4S)-2-(1-cyanocyclopropylcarbamoyl)-4-methanesulfonyloxypyrrolidine-1-carboxylic acid tert-butyl ester 、
2-巯基苯甲醇 以yielded (2S,4R)-2-(1-cyano-cyclopropylcarbamoyl)-4-(2-hydroxymethyl-phenylsulfanyl)-pyrrolidine-1-carboxylic acid t-butyl ester as a colorless oil的产率得到(2S,4R)-2-(1-cyano-cyclopropylcarbamoyl)-4-(2-hydroxymethyl-phenylsulfanyl)-pyrrolidine-1-carboxylic acid t-butyl ester