Magnetite and Metal-Impregnated Magnetite Catalysts in Organic Synthesis: A Very Old Concept with New Promising Perspectives

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Title: Magnetite and Metal-Impregnated Magnetite Catalysts in Organic Synthesis: A Very Old Concept with New Promising Perspectives
Authors: Baeza, Alejandro | Guillena, Gabriela | Ramón, Diego J.
Research Group/s: Nuevos Materiales y Catalizadores (MATCAT) | Catálisis Estereoselectiva en Síntesis Orgánica (CESO)
Center, Department or Service: Universidad de Alicante. Departamento de Química Orgánica | Universidad de Alicante. Instituto Universitario de Síntesis Orgánica
Keywords: Green chemistry | Heterogeneous catalysis | Impregnation | Magnetite | Organic synthesis
Knowledge Area: Química Orgánica
Issue Date: 7-Jan-2016
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Citation: ChemCatChem. 2016, 8(1): 49-67. doi:10.1002/cctc.201500854
Abstract: Magnetite is a well-known material, with the impregnation of transition metals onto its surface being a very old protocol for preparing catalysts. However, only recently, the combination of both, magnetite and impregnation protocols, have been recognized as a powerful methodology to prepare catalysts. The impregnation protocol, of nearly all transition metals in the magnetite surface, has rendered the first generation of catalysts. These simple catalysts have been used in a very broad range of organic transformations. Thus, simple imine derivative formation or unknown reactions such as the direct cross β-alkylation of primary alcohols, through dehydrogenation, oxidation, addition, hydrogen autotransfer, and multicomponent reactions has been accomplished using these catalysts. In most cases, these catalysts could be just isolated by magnetic decantation and reused several times without a detrimental effect on the initial results. In some cases, the study of the surface of the catalyst by means of several surface characterization techniques has permitted to determine the real species involved in the process and their structural changes within the reaction cycles. Furthermore, the post-modification of the catalysts by reduction or oxidation of the immobilized metal, or by the addition of ligands, has enlarged the applicability of this type of catalysts.
Sponsor: This work was supported by the current Spanish Ministerio de Economía y Competitividad (CTQ2011-24151) and by the University of Alicante.
URI: http://hdl.handle.net/10045/61953
ISSN: 1867-3880 (Print) | 1867-3899 (Online)
DOI: 10.1002/cctc.201500854
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Peer Review: si
Publisher version: http://dx.doi.org/10.1002/cctc.201500854
Appears in Collections:INV - MATCAT - Artículos de Revistas
INV - CESO - Artículos de Revistas
INV - AMIC - Artículos de Revistas

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