2(S)-[2(S)-(4-guanidinomethyl-benzoylamino)-3-methyl-butyrylamino]-3-phenyl-propionic acid   、                                                                                      
苄胺                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺   、                                                                                                  N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 20.02h,
                                                                                                                以45%的产率得到N-[1(S)-(1(S)-benzylcarbamoyl-2-phenyl-ethylcarbamoyl)-2-methyl-propyl]-4-guanidinomethyl-benzamide