Abstract
Metalloporphyrins effectively catalyze C-H bond functionalization, including C-O (hydroxylation), C-N (amination), and C-C bond formation (carbene insertion). Over the last 20 years, numerous papers have reported that these complexes display catalytic efficiency and selectivity (regioselectivity and enantioselectivity) in solution (homogeneous catalysis). Green chemistry advocates idealization and production of more efficient, selective, and preferably recyclable catalysts to develop technological processes that are increasingly aligned with the principles. This has encouraged investigations into processes that can heterogenize efficient metalloporphyrin (MP) catalysts. Indeed, scientists have more and more often used heterogeneous catalysis as a tool to design clean and green processes. In this context, silica and its many functionalized derivatives represent an excellent strategy to obtain inexpensive, inert, and often highly pure (depending on the preparation route) supports to immobilize catalytic species. In this review, we intend to address this issue.
Keywords: Catalysis, heterogeneous catalysis, immobilization, oxidation reaction, porphyrin, silica.
Current Organic Synthesis
Title:Metalloporphyrins Immobilized on Silica and Modified Silica as Catalysts in Heterogeneous Processes
Volume: 11 Issue: 1
Author(s): Shirley Nakagaki, Gabriel K.B. Ferreira, Alex L. Marcalb and Katia J. Ciuffi
Affiliation:
Keywords: Catalysis, heterogeneous catalysis, immobilization, oxidation reaction, porphyrin, silica.
Abstract: Metalloporphyrins effectively catalyze C-H bond functionalization, including C-O (hydroxylation), C-N (amination), and C-C bond formation (carbene insertion). Over the last 20 years, numerous papers have reported that these complexes display catalytic efficiency and selectivity (regioselectivity and enantioselectivity) in solution (homogeneous catalysis). Green chemistry advocates idealization and production of more efficient, selective, and preferably recyclable catalysts to develop technological processes that are increasingly aligned with the principles. This has encouraged investigations into processes that can heterogenize efficient metalloporphyrin (MP) catalysts. Indeed, scientists have more and more often used heterogeneous catalysis as a tool to design clean and green processes. In this context, silica and its many functionalized derivatives represent an excellent strategy to obtain inexpensive, inert, and often highly pure (depending on the preparation route) supports to immobilize catalytic species. In this review, we intend to address this issue.
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Nakagaki Shirley, Ferreira K.B. Gabriel, Marcalb L. Alex and Ciuffi J. Katia, Metalloporphyrins Immobilized on Silica and Modified Silica as Catalysts in Heterogeneous Processes, Current Organic Synthesis 2014; 11 (1) . https://dx.doi.org/10.2174/15701794113106660087
DOI https://dx.doi.org/10.2174/15701794113106660087 |
Print ISSN 1570-1794 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6271 |
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