三氟乙酸   、                                                                                      
[2-Oxo-1-({[4-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-cyclohexylmethyl]-carbamoyl}-methyl)-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl]-acetic acid tert-butyl ester                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以95.6%的产率得到trans-{2-oxo-1-[2-oxo-2-({[4-(5,6,7,8-tetrahydro-1,8-naphthyridin-2-ylamino)cyclohexyl]methyl}amino)ethyl]-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl}acetic acid trifluoroacetate