Manganese porphyrins immobilized on magnetic SBA-15 mesoporous silica as selective and efficient catalysts for cyclic and linear alkane oxidation

Iron(III) Complexation with Galactodendritic Porphyrin Species and Hydrocarbons’ Oxidative Transformations

“…On the other hand, products from the oxidation of linear alkanes in the terminal positions are of great interest for the chemical and pharmaceutical industry since, for example, they can be used for the production of adipic acid, from the oxidation of hexane in terminal positions, an important commodity for the production of Nylon‐6,6 [8,36] . Synthetic metalloporphyrins have been intensely studied as catalysts in the oxo‐functionalization of these less reactive substrates in the attempt to obtain more efficient and environmentally friendly selective catalytic systems [11c,37] …”

The Research on Porphyrins and Analogues in Brazil: A Small Review Covering Catalytic and other Applications since the Beginning at Universidade de São Paulo in Ribeirão Preto until the Joint Venture between Brazilian Researchers and Colleagues from Universidade de Aveiro, Portugal

“…In spite of all the different solids used as supports for the immobilization of metalloporphyrins (Table 1), there is an expectation that MPs organized as porous materials, either using a porous solid as support (e.g., macroporous LDH, mesoporous silicas or zeolites), [85][86][87][89][90][91]99,100,125 or integrated into porous structures, such as metal-organic frameworks (MOFs) 27,80,140,141,145,146,192,193 or porous organic polymers (e.g., PIM = polymers of intrinsic microporosity), 149,153 will have enhanced catalytic performance, mainly regarding the selectivity, relative to non-porous materials, since the confinement effect for reagents and/or products may lead to unusual and unexpected selectivities for the same reaction relative to a homogeneous environment.…”

“…The results also suggested that the longer reaction time (1 h versus 24 h) favors substrate access to the catalytic active species confined in the structure of the solid support, improving the efficiency and selectivity of the catalyst for oxidation in the substrate's terminal position. More recently, Ucoski et al 87 reported the unusual catalytic performance of a solid based on electrostatic immobilization of a manganese porphyrin on mesoporous silica SBA-15 modified magnetite (Figure 12). The idea that the mesoporous material could give unusual selectivity to the catalytic reaction was again explored.…”

“…These objectives have contributed to an increasing number of reports on the use of solids based on magnetic particles for various catalytic purposes. 86,87,[92][93][94][201][202][203][204] A solid support based on mesoporous SBA-15 silica (Santa Barbara Amorphous) 205 and magnetite particles (F 3 O 4 ) was prepared (named SBA-Si-Mag), and then two cationic MnPs (here named as MnP1, and MnP2) were immobilized on them, generating two solid catalysts (MnP1-SBA-Si-Mag and MnP2-SBA-Si-Mag, Figure 12). The third generation porphyrin MnP2 was used to search for the best efficiency of the cationic catalyst.…”

Consecutive Oxidation/Condensation/Cyclization/Aromatization Sequences Catalyzed by Nanostructured Iron(III)‐Porphyrin Complex towards Benzoxazole Derivatives

“…One of the appealing options for the construction of green and efficient catalysts is to use the porphyrin family. Recently, various metalloporphyrins have been prepared and used in organic reactions …”