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Catalizadores de cobalto estables e inertes para la hidrogenación altamente selectiva y práctica de los enlaces CN y

Feng Chen¹, Christoph Topf¹, Jörg Radnik¹

¹Leibniz-Institut für Katalyse e.V. an der Universität Rostock , Albert-Einstein Straße 29a, Rostock 18059, Germany.

Journal of the American Chemical Society

|June 21, 2016

Resumen

Los nuevos catalizadores de cobalto convierten eficientemente los nitriles y los compuestos carbonílicos en aminas y alcoholes. Los sistemas de catalizadores optimizados demuestran una alta actividad y selectividad en condiciones suaves para aplicaciones industriales.

Área de la Ciencia:

Catálisis
Ciencias de los materiales
Química orgánica

Sus antecedentes:

Los catalizadores heterogéneos son cruciales para las transformaciones químicas eficientes.
Los materiales basados en cobalto ofrecen potencial para aplicaciones catalíticas.
La pirólisis de complejos metálicos en soportes es un método para la preparación de catalizadores.

Objetivo del estudio:

Desarrollar nuevos catalizadores heterogéneos basados en cobalto.
Investigar la influencia del soporte y la modificación del ligando en el rendimiento del catalizador.
Evaluar los catalizadores en la hidrogenación de los nitriles y compuestos carbonílicos.

Principales métodos:

Preparación de complejos de cobalto con ligandos de nitrógeno.
Pirólisis de complejos en soportes inorgánicos (por ejemplo, α-Al2O3).
Prueba de la actividad y la selectividad del catalizador en las reacciones de hidrogenación.

Principales resultados:

El rendimiento del catalizador depende en gran medida del soporte y la elección del ligando.
Un catalizador óptimo ([Co(OAc) 2/Phen@α-Al2O3]-800) reduce eficientemente los nitriles aromáticos y alifáticos a las aminas primarias.
Diversas cetonas y aldehídos se reducen fácilmente a alcoholes utilizando el catalizador óptimo.

Conclusiones:

Los catalizadores heterogéneos basados en cobalto desarrollados son eficaces para la hidrogenación de nitrilo y carbonilo.
El sistema óptimo de catalizador muestra una amplia aplicabilidad y practicidad para sintetizar aminas y alcoholes.
El diseño del catalizador a través del soporte y la modificación del ligando es clave para lograr un alto rendimiento.

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