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