4-Phenyl-1,2,4-triazolin-3,5-dione readily cycloadds to endo- and exo-tricyclo[3.2.1.02,4]oct-6-enes to give Δ1-1,2-diazetines besides skeletally rearranged products. All adducts can be converted to the respective azo compounds which exhibit some unusual thermal and photochemical behavior.
                                    4-Phenyl-1,2,4-triazolin-3,5-dione 很容易环加成内型和外型
三环[3.2.1.02,4]oct-6-enes,除了骨架重排外还得到 Δ1-1,2-二氮杂
环丁烷产品。所有加合物都可以转化为各自的偶氮化合物,这些化合物表现出一些不寻常的热和光
化学行为。