A convenient preparation of polymer-supported manganese porphyrin and its use as hydrocarbon monooxygenation catalyst

Catalytic Activity and Mechanism of Co‐Catalysts Used in Combinational Catalysts for Aerobic Oxidation

“…Crosslinked polystyrene (CPS) microspheres are another kind of polymer microspheres, and they are superior to CPGMA microspheres. CPS microspheres are often used as catalyst support because of their mechanical robustness, chemical inertness, and facile functionalization , . In this work, TEMPO was immobilized on CPS microspheres (commonly known as white microspheres) through two steps of polymer reactions, Friedel–Crafts acylation and nucleophilic substitution, to obtain the heterogeneous TEMPO/CPS microsphere catalysts.…”

Homogeneous and Heterogeneous Free-Based Porphyrins Incorporated to Silica Gel as Fluorescent Materials and Visible Light Catalysts Mimic Monooxygenases

“…However, in the presence of H 2 O 2 , the irreversible deactivation of catalyst took place, by leaching of the porphyrin complex from zeolite, followed by a loss of activity when the catalyst was reused (Skrobot et al, 2003). Tangestaninejad et al have described the tetra(4-pyridyl)porphyrinato manganese(III) anchored in chloromethylated styrene-divinylbenzene copolymer as an efficient and reusable catalyst for the (R)-(+)-limonene epoxidation by sodium periodate, among several other alkenes (Moghadam et al, 2004). The Chinese team has utilized manganese(III) 5,10,15-tris(tolyl)-20-(4-hydroxyphenyl) porphyrin covalently attached to the Merrifield's peptide resin for the highly diastereoselective epoxidation of cholest-5-ene derivatives (Du, et al, 2004).…”

Polystyrene microsphere-immobilized palladium(II) porphyrin as mild, reusable, and highly efficient catalyst for Heck reaction

“…Compared with common nitrogen ligands, porphyrins, which are tetradentate pincer ligands, can provide more stable palladium complexes suitable for Heck reactions (Wan & Liu, 2009). However, palladium-porphyrin homogeneous catalysts have two drawbacks that limit their practical applications in synthetic chemistry and industrial processes (Rahiman, Rajesh, Shanmuga Bharathi, Sreedaran, & Narayanan, 2006;Moghadam, Tangestaninejad, Habibi, & Mirkhani, 2004;Moghadam, Tangestaninejad, Mirkhani, Mohammadpoor-Baltork, & Kargar, 2005;Naik, Joshi, Umbarkar, & Deshpande, 2005). (1) The porphyrin ring is liable to oxidative self-destruction and palladium-porphyrins are prone to aggregation through p-p interactions.…”