meso-Tetrapyridylporphins and Their Metal Complexes. Syntheses and Physico-Chemical Properties

Setsuro Sugata, Shoko Yamanouchi, Yoshikazu Matsushima

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Three isomers of meso-tetrapyridylporphins, i.e. tetra(2-pyridyl)- (2), (3-pyridyl)-(3), and (4-pyridyl)- (4), porphin have been synthesized. They were soluble in acetic acid, chloroform and acidic aqueous solvents. Solubilities in chloroform, dimethylform-amide and pyridine were in the order 3>2>4. Comparison of the visible spectra indicated that the intensities of the bands due to 0–0 transitions decreased (3>4>2) with an increase of the electron-withdrawing character of the pyridyl substituent. The copper(II) and zinc(II) complexes of 2 and 3 have been prepared. Infrared and nuclear magnetic resonance spectra and their assignments of the porphins and/or the metal complexes were described.

Original languageEnglish
Pages (from-to)884-889
Number of pages6
JournalChemical and Pharmaceutical Bulletin
Issue number5
Publication statusPublished - 1977


  • copper porphyrin
  • meso-tetra(2-pyridyl) porphin
  • meso-tetra(3-pyridyl) porphin
  • meso-tetra(4-pyridyl)porphin
  • solubility of porphyrins
  • visible spectra of porphyrins
  • zinc porphyrin

ASJC Scopus subject areas

  • Chemistry(all)
  • Drug Discovery


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