Journal
INORGANICA CHIMICA ACTA
Volume 455, Issue -, Pages 415-428Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2016.04.012
Keywords
Vanadium compounds; Polymer-supported vanadium complexes; Organic polymeric supports; Catalytic oxidations; Organic transformations; Asymmetric synthesis
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Funding
- Science and Engineering Research Board (SERB), Government of India, New Delhi [EMR/2014/000529]
- Fundacao para a Ciencia e a Tecnologia [PEst-OE/QUI/UI0100/2013]
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Homogeneous catalysts have widespread technological application. However, due to advantageous features of immobilization of homogeneous catalysts on solid supports over their soluble counterparts, particularly their easy separation from the reaction mixture and their recycle ability, such systems have grown rapidly over the past few years. Amongst transition-metal compounds, vanadium-based complexes are often good catalysts for oxidation of organic compounds, e.g. by using H2O2 as primary oxidant, and have been successfully applied to a great variety of substrates. This work revises and discusses the performance of the various vanadium-based systems immobilized on polymeric supports developed since ca. 2011, with enhanced focus on applications for asymmetric synthesis. Several strategies are used to prepare immobilized vanadium-based complexes to be used as catalysts. The usual starting point is typically the selection of a homogeneous catalyst i.e. a vanadium complex that has been demonstrated to be highly active and/or highly selective. The additional constraints of the immobilized catalysts sometimes result in more effective catalysts with high turnover numbers which offer real prospect for technological developments. (C) 2016 Elsevier B.V. All rights reserved.
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