4-苯基-1,2,4-三唑啉-3,5-二酮   、                                                                                      
6,7-Dihydro-1-(4-methylphenylsulfonyl)-2-(triphenylphosphoranylidenamino)-1H-azepin-3,4,5-tricarbonsaeure-trimethylester                                                                                                                                                                                              以
                                                                                         
氯仿                                                                                  为溶剂,
                                                                                                                                                                                        以48%的产率得到2,3,5,6,7,9a-Hexahydro-7-(4-methylphenylsulfonyl)-1,3-dioxo-2-phenyl-8-<(triphenylphosphoranyliden)amino>-1H,4aH-<1,2,4>triazolo<1',2':1,2>diazet<3,4-d>azepin-4a,9,9a-tricarbonsaeure-trimethylester