4-(4'-trifluoromethyl-biphenyl-2-carbonylamino)-1-methyl-pyrrole-2-carboxylic acid   、                                                                                      
4-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-benzylamine                                                                                                                                                              在
                                                                                                                                                                                 O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        以90%的产率得到N-[4-(1,4-dioxa-8-aza-spiro[4.5]dec-8-yl)-phenylmethyl]-4-(4'-trifluoromethylbiphenyl-2-carbonylamino)-1-methyl-pyrrole-2-carboxylic acid amide