Quadricyclane was photooxygenated with singlet oxygen generated under Rose-Bengal-sensitized conditions to a dioxetane, which in turn gave 2-cyclopentene-1,4-dicarbaldehyde and 5-norbornene-cis-2,3-exo-diol. For the mechanism to form the dioxetane, an involvement of a [2σ+2σ+2π] electrocyclic process is proposed.
四环烯在玫瑰
苯胺敏化条件下与生成的单线态氧光氧化,生成二氧烯,然后进一步生成2-
环戊烯-1,4-二醛和5-诺尔本烯-顺-2,3-外二醇。关于生成二氧烯的机制,建议涉及一个[2σ+2σ+2π]电环过程。