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