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Novel Porphyrinoids, 13. – Synthesis and Electrophilic Substitution of New Partially β-Unsubstituted [18]Porphyrins

✍ Scribed by Franck, Burchard ;Krautstrunk, Gerhard

Book ID: 102900981
Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 514 KB
Volume: 1993
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.1993199301172

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✦ Synopsis

Abstract

Three porphyrins 2, 3, and 4, related to Hans Fischer's octaethylporphyrin 1, but with unsubstituted pyrrole β‐positions were synthesized via the biladiene pathway. The ring‐closing reaction to form the porphyrin reveals a conformational control, called helical effect. These new porphyrins made possible an investigation of the regioselectivity of electrophilic aromatic substitutions at the porphyrin perimeter.

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