Efficient synthesis of extended conjugation porphyrins and search for a novel function utilizing their pi-system

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This research result roughly consists of three topics. (BCOD=[2.2.2]bicyclooctadiene)1) We planned to progress the conjugation expansion of BCOD part and metal coordination in one pot. Monobenzoporphyrin triple-decker type complexes were selectively obtained in moderate yield under this condition. Their structure were determined by X-ray analysis. 2) The porphyrins with esters groups in the BCOD moiety. The ester groups can be converted into the diene strucutre. The condition of the conversion into diene form and Diels-Alder reaction of the corresponding porphyrin with several dienophiles were investigated. 3) The synthesis of diporphyrin with chiral bridge was accomplished. The complexation behavior of the diporphyrin with fullerenes was examined and the structure of inclusion complexes were revealed by X-ray analysis.