Synthesis of a “doubly-strapped” porphyrin is described, which has two –O(CH2)10O– straps on both sides of the porphyrin ring. This porphyrin did not form the zinc complex when treated with zinc acetate, even under forcing conditions. Such inertness toward zinc insertion can be attributed to the steric hindrance of the –O(CH2)10O– straps. Oligoporphyrins with one strapped ring were also synthesized. Reaction of these porphyrins with zinc acetate resulted in insertion of zinc into all non-strapped rings, while the strapped ring remained unchanged. These doubly-strapped porphyrins will be useful in constructing oligoporphyrins as photosynthetic model compounds, in which photochemical and electrochemical properties are controlled by selective metal insertion.
                                    描述了一种“双带”
卟啉的合成,该
卟啉在
卟啉环的两侧各有一个 –O(
CH2)10O– 带。即使在强制条件下,这种
卟啉在处理
锌乙酸盐时也未形成
锌复合物。这种对
锌插入的不敏感性可归因于 –O(   )10O– 带的立体障碍。还合成了带有单一带的寡
卟啉。这些
卟啉与
锌乙酸盐反应导致
锌插入所有非带环中,而带环保持不变。这些双带
卟啉将在构建作为光合模型化合物的寡
卟啉中发挥作用,其中通过选择性
金属插入来控制光
化学和电
化学性质。