1-(naphthalen-1-ylmethyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid   、                                                                                      
2-甲基-2-丙基(E)-N5-(氨基{[(2,2,5,7,8-五甲基-3,4-二氢-2H-苯并吡喃-6-基)磺酰基]氨基}亚甲基)-L-鸟氨酰i噻吩基n酸酯   、                                                                                      
2-(1h-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate   、                                                                                      
N,N-二异丙基乙胺                                                                                                                                                                                              以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以to provide 910 mg tert-butyl (2S)-2-({[1-(1-naphthylmethyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-{[(2,2,5,7,8-pentamethyl-3,4-dihydro-2H-chromen-6-yl)sulfonyl]carbamimidamido}pentanoate的产率得到tert-butyl (2S)-2-({[1-(1-naphthylmethyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-{[(2,2,5,7,8-pentamethyl-3,4-dihydro-2H-chromen-6-yl)sulfonyl]carbamimidamido}pentanoate