(2S,4R)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide hydrochloride 、
四氢吡喃-4-甲酸 、 以to give (2S,4R)-1-(tetrahydro-pyran-4-carbonyl)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide as a colorless oil的产率得到(2S,4R)-1-(tetrahydro-pyran-4-carbonyl)-4-(2-trifluoromethyl-benzenesulfonyl)-pyrrolidine-2-carboxylic acid cyanomethyl-amide