Control electrónico de metales preciosos soportados para catalizar reacciones de formación carbono-nitrógeno e hidrogenación de anillos aromáticos
In this thesis, different solids-containing precious metals has been prepared with controlled size and electronics, and used as catalysts for hydrogenation and hydroadition reactions, among others, obtaining prod-ucts of interest in Fine Chemistry. A palladium catalyst comprising <3 nm nanopa...
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| Formato: | tesis doctoral |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | español |
| OAI Identifier: | oai:riunet.upv.es:10251/77993 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/77993 |
| Access Level: | acceso abierto |
| Palavra-chave: | Catálisis metales hidrogenación |
| Resumo: | In this thesis, different solids-containing precious metals has been prepared with controlled size and electronics, and used as catalysts for hydrogenation and hydroadition reactions, among others, obtaining prod-ucts of interest in Fine Chemistry. A palladium catalyst comprising <3 nm nanoparticules supported on carbon is capable of hydrogenating different nitroderivative compounds and subsequent cross-couplings of the amine generated in the process, with high chemoselectivity and at relatively low temperatures. Furthermore, this catalyst with a Lewis acid function allows to obtain cyclohexanone oxime directly from nitrobenzene under mild reaction condi-tions with yields above 95%. A carbon-supported nanoalloy platinum-ruthenium catalyst catalyzes the hydrogenation of different types of aromatic rings such as acetophe-none, vinyl benzoic acid, anisole and butylbenzene as well as coupling re-action cascades with other nitro groups, ketones, nitriles or oximes, to ob-tain different types of secondary amines. The catalytically active species of different insoluble metallic chlo-rides for hydroadition reactions is a metallic monomer disgregated from the polymeric salt by the action of substrates and products. These active spe-cies can be mimicked by the electronic modulation of zeolite Y-supported metal solids, which are able to perform the hydroamination of alkynes with good yields and selectivity, getting a reusable catalyst operating under mild conditions. Furthermore, different NSAIDs were synthesized with the sup-ported Pt catalyst to give different in-vitro cyclooxygenase activities. |
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