Inside Cover: Preferential Formation of Cyclic Trimers by Palladium-Catalyzed Oxidative Coupling Reactions of 2,18-Diethynylporphyrins (Angew. Chem. Int. Ed. 49/2012)

Authors

  • Sumito Tokuji,

    1. Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
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  • Prof. Dr. Hideki Yorimitsu,

    Corresponding author
    1. Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
    • Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
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  • Prof. Dr. Atsuhiro Osuka

    Corresponding author
    1. Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
    • Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
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Abstract

original image

Cyclic porphyrin oligomers are difficult to obtain efficiently. In their Communication on page 12357 ff., A. Osuka, H. Yorimitsu, and S. Tokuji show Pd-catalyzed trimerization of 2,18-diethynylporphyrins. Hexaporphyrins with meso–meso directly linked porphyrins can be used to model a light-harvesting antenna. The crystal structure of the trimer resembles the family crest of Mitsuba-aoi (three leaves of Hollyhock), which is the famous crest of the Tokugawa clan.

Cartoon 1.

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