4-苯基-1,2,4-三唑啉-3,5-二酮 、
6,7-Dihydro-1-(4-methylphenylsulfonyl)-2-(triphenylphosphoranylidenamino)-1H-azepin-3,5-dicarbonsaeure-dimethylester 以
氯仿 为溶剂,
以84%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-dicarbonsaeure-dimethylester