Cyclohexane hydroxylation by iodosylbenzene and iodobenzene diacetate catalyzed by a new β-octahalogenated Mn–porphyrin complex: The effect of meso-3-pyridyl substituents

Porphyrins as Catalysts in Scalable Organic Reactions

“…Other types of porphyrins have been explored for this hydroxylation reaction, and in 2007, Idemori and co-workers studied Mn(III)-tetrapyridylporphyrin as catalyst in the hydroxylation of cyclohexene [67]. Iida and co-workers have shown that the combination of tert-butyl hydroperoxide (TBHP) and the osmium(II) carbonyl complex of meso-tetramesitylporphyrin [Os(TMP)(CO)] as oxygen donor and catalyst respectively (Scheme 16), is an efficient and versatile oxidation system for the functionalization of bioactive molecules, like bile acids [68] and terpenoids [69].…”

“…Iida and co-workers have shown that the combination of tert-butyl hydroperoxide (TBHP) and the osmium(II) carbonyl complex of meso-tetramesitylporphyrin [Os(TMP)(CO)] as oxygen donor and catalyst respectively (Scheme 16), is an efficient and versatile oxidation system for the functionalization of bioactive molecules, like bile acids [68] and terpenoids [69]. Other types of porphyrins have been explored for this hydroxylation reaction, and in 2007, Idemori and co-workers studied Mn(III)-tetrapyridylporphyrin as catalyst in the hydroxylation of cyclohexene [67]. Iida and co-workers have shown that the combination of tert-butyl hydroperoxide (TBHP) and the osmium(II) carbonyl complex of meso-tetramesitylporphyrin [Os(TMP)(CO)] as oxygen donor and catalyst respectively (Scheme 16), is an efficient and versatile oxidation system for the functionalization of bioactive molecules, like bile acids [68] and terpenoids [69].…”

Chemical Reactions Catalyzed by Metalloporphyrin-Based Metal-Organic Frameworks

“…The introduction of electronegative groups in the β-pyrrole positions of the ring of second-generation porphyrins give rise to porphyrin ligands of the third generation [Figure 2(c)]. At first, it was expected that the addition of extra EWG or bulky groups would render the macrocycle ring even more robust and resistant to oxidative self-destruction and increase the catalytic activity of MP, but most of the communications on third-generation MPs published in the past two decades have revealed that they do not furnish the same catalytic results as the second-generation counterparts [23,24,25,26,27,28,29,30,31]. In homogeneous catalysis, third-generation MP undergo inactivation for several reasons, consequently providing poor catalytic yields.…”

Spectroscopic and electrochemical studies of high-valent water soluble manganese porphyrine. Electrocatalytic water oxidation

“…This behaviour is due to the fact that the chloride ion oxidation overlaps 9) and (᭹) Eq. (11). C) Effect of the pH on the chloride oxidation charge (Eq.…”

“…In particular, synthetic manganese porphyrins derived from Mn(III)mesotetraphenylporphyrin, (TPP)Mn(III) show the catalytic ability to mimetize various biological systems in homogenous or heterogeneous catalysis [1][2][3]. Furthermore, these macromolecules have been employed as catalysts in a variety of oxidation reactions [4], including olefin epoxidation [1,[5][6][7][8], hydroxylation of alkenes and alkanes [9][10][11] and oxidative degradation of pollutants and hazardous waste [12,13], and usually show similar or better catalytic properties than their iron analogs. An integral part of the research in these fields has been the isolation of the high-valent metalloporphyrin intermediates involved in these processes.…”