Synthesis and application of new type of porphyrins

在碱存在下，芳香硝基化合物与异氰基乙酸乙酯反应合成了异吲哚。研究了该路线的适用范围和局限性。通过对碱和溶剂的选择，各种芳香硝基化合物都可转化为相应的异吲哚。由此制备的异吲哚被转化为相应的卟啉。这种卟啉的电子性质很好地控制了稠合芳环的选择。其中，红移最大的是那些与苊烯环稠合的卟啉化合物，在600 nm和800 nm处分别出现Soret带和Q带，作为一种新型的卟啉化合物，还制备了多环骨架和冠醚稠合的卟啉化合物。它们可以为传感器或催化剂提供潜在有用的材料。

Isoindoles were prepared by the reaction of aromatic nitro compounds with ethyl isocyanoacetate in the presence of base. The scope and limitation of this route were studied. By the choice of base and solvent all kinds of aromatic nitro compounds were converted into the corresponding isoindoles. Isoindoles thus prepared were converted into the corresponding porphyrins. The electronic properties of such porphyrins are nicely controlled by the choice of fused aromatic rings. The most red-shifted porphyrins are those fused with acenapthyrene rings to show 600 nm and 800 nm as a soret band and Q bands, respectively.As a new type of porphyrins, porphyrins fused with polycyclic skeletons and crown ether were also prepared. They may provide potentially useful materials for a sensor or a catalyst.