Facile aerial oxidation of a porphyrin. Part 3. Some metal complexes of meso-tetrakis-(3,5-di-t-butyl-4-hydroxyphenyl)porphyrin

Organotins‐promoted peroxidation of unsaturated fatty acids: A new antioxidative scavenger for promoters

“…The free base porphyrins meso-tetraphenylporphyrin and meso-tetrakis(3,5-di-tert-butyl-4-hydroxyphenyl)porphyrin were synthesized as described previously by the known procedures [25][26][27][28], purified by silica gel column chromatography using CHCl 3 , 80% CHCl 3 , and 20% hexane as the eluting solvents and identified by UV-Vis and IR spectroscopy. UVVis spectra were recorded on a Varian 100S spectrophotometer in CH 2 Cl 2 , benzene, CHCl 3 , and oleic acid.…”

Synthesis and antioxidative activity of metalloporphyrins bearing 2,6-di-tert-butylphenol pendants

“…Oxidation of porphyrins 1a-f and 2a-f to the corresponding radicals 1a Å -f Å and 2a Å -f Å Porphyrins 1a-f and 2a-f were oxidized in anhydrous toluene by the tenfold excess of PbO 2 at 293 K using diphenylpicrylhydrazyl as a standard in the determination of gfactor. The experimental X-band EPR spectra of radicals 1a Å -f Å and 2a Å -f Å show triplets typical for organic phenoxyl radicals [31,32] characterizing interaction of a spin of the unpaired electron with two equivalent meta-protons in phenoxyl residue (Fig. 2).…”

Oxidase Activity of Iron and Manganese Porphyrins with Antioxidant 2,6-Di-tert-butylphenol Groups

“…[13][14][15][16][17][18] Получены серии порфиринов, содержащих фенольные (1-2) или фенильные (1а-2а) заместители.…”