The synthesis and characterization of new metal-free and metalloporphyrazine containing macrobicyclic moieties

The synthesis and characterization of new metal-free (8) and metal derivatives of a symmetrically four substituted porphyrazines (7,9) derived from 15,18,23,26-tetraoxa-5,8-dithia-1,12-diazabicyclo[10.8.8]octacos-6-ene-6,7-dicarbonitrile (6), which were synthesized in a multi-step reaction sequence have been investigated. These compounds were prepared starting from dicyanoethylene containing macrobicycle which contains sulfur, oxygen as well as nitrogen heteroatoms. These pigments were characterized by 1H, 13C NMR, IR, UV–vis, mass spectrometry, microanalysis and AA spectrophotometry.