Oxidative C–N fusion of pyridinyl-substituted porphyrins†
Abstract
The mild (electro)chemical oxidation of pyridin-2-ylthio-meso substituted Ni(II) porphyrins affords C–N fused cationic and dicationic pyridinium-based derivatives. These porphyrins are fully characterized and the molecular structure of one of them was confirmed by X-ray crystallography. A mechanism for the intramolecular oxidative C–N coupling is proposed based on theoretical calculations and cyclic voltammetry analyses.