(2S,4R)-4-(2-chlorobenzenesulfonyl)-2-(1-cyanocyclopropylcarbamoyl)pyrrolidine hydrochloric acid 、
2,2,3,3,3-五氟三氟甲烷磺酸丙酯 以to give (2S,4R)-4-(2-chloro-benzenesulfonyl)-1-(2,2,3,3,3-pentafluoro-propyl)-pyrrolidine-2-carboxylic acid (1-cyano-cyclopropyl)-amide as a colorless oil的产率得到(2S,4R)-4-(2-chlorobenzenesulfonyl)-1-(2,2,3,3,3-pentafluoropropyl)pyrrolidine-2-carboxylic acid (1-cyanocyclopropyl)amide