Synthesis of Multi(metallo)porphyrin Dendrimers through Nucleophilic Aromatic Substitution on meso-Pyrimidmyl Substituted Porphyrins

摘要

A convergent synthetic strategy toward novel all-porphyrin dendrimers,which can be regarded as synthetic model systems of the natural photosynthetic light-harvesting antennae,was successfully explored.The dendron propagation,based on nucleophilic aromatic substitution reactions on a meso-dichloropyrimidinyl substituted porphyrin AB_2 monomer,was carried out up to the second-generation dendron,and the used approach was proven to be compatible with the stepwise introduction of different metals in the successive generations.Three different metals(Pt,Zn,and Ni)could be introduced in the second-generation heptaporphyrin dendron.By applying analogous meso-dichloropyrimidinyl substituted porphyrin cores,novel multiporphyrin dendrimers were obtained.