Incorporation of the 1,5-naphthalene subunit into heteroporphyrin structure: toward helical aceneporphyrinoids

J Org Chem. 2013 May 17;78(10):5090-5. doi: 10.1021/jo4006624. Epub 2013 May 3.

Abstract

5,10,15,20-Tetraaryl-22-hetero-1,5-naphthiporphyrins, which contain a 1,5-naphthylene moiety instead of one pyrrole embedded in the macrocyclic framework of heteroporphyrins, were obtained by the [3 + 1] approach using the 1,5-naphthylene analogue of tripyrrane (1,5-bis(phenyl(2-pyrolyl)methyl)naphthalene) and 2,5-bis(arylhydroxymethyl)heterocyclopentadiene (heterocyclopentadiene: thiophene, selenophene, tellurophene). The steric constraints, imposed by the substitution mode of the 1,5-naphthylene building block, resulted in the specific helical conformation of 22-hetero-1,5-naphthiporphyrins. The spectroscopic and structural properties of these aceneporphyrinoids indicate a lack of macrocycle aromaticity. Their protonation yielded solely dicationic species.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Models, Molecular
  • Molecular Structure
  • Naphthalenes / chemical synthesis*
  • Naphthalenes / chemistry*
  • Porphyrins / chemical synthesis*
  • Porphyrins / chemistry*

Substances

  • Naphthalenes
  • Porphyrins