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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Reducción catalizada por iridio de amidas secundarias a aminas e iminas secundarias por el dietilsilano
Chen Cheng1, Maurice Brookhart
1Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
Journal of the American Chemical Society
|July 10, 2012
Resumen
Los catalizadores de iridio reducen eficientemente las amidas secundarias a iminas y aminas utilizando dietilsilano. Esta reducción gradual ofrece altos rendimientos y tolerancia del grupo funcional a temperatura ambiente.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- La catálisis de la catálisis.
- Metodología sintética de la metodología sintética.
Sus antecedentes:
- Las amidas secundarias son grupos funcionales versátiles en la síntesis orgánica.
- Los métodos catalíticos eficientes para la reducción de amidas son cruciales para acceder a las iminas y aminas.
- Los métodos de reducción existentes pueden carecer de eficiencia o tolerancia de grupo funcional.
Objetivo del estudio:
- Desarrollar un nuevo sistema catalítico para la reducción de amidas secundarias.
- Para lograr la reducción gradual a las iminas y aminas secundarias.
- Explorar la eficiencia y el alcance del sistema catalítico desarrollado.
Principales métodos:
- Los catalizadores de iridio utilizados, específicamente [Ir(COE) 2Cl] 2.
- Empleó dietilsilano como agente reductor.
- Se investigó la reducción gradual mediante el control de la estequiometría silane.
Principales resultados:
- Se logra la reducción catalítica de amidas secundarias a iminas y aminas secundarias.
- Reducción gradual demostrada, lo que permite el aislamiento de los intermediarios de imina.
- Mostró una alta eficiencia con hasta 1000 volúmenes de negocio y 99% de conversión a temperatura ambiente.
- Tolerancia apreciable del grupo funcional exhibida.
Conclusiones:
- Desarrolló un método eficiente catalizado por iridio para la reducción secundaria de amida.
- El método proporciona acceso a las iminas y aminas secundarias con altos rendimientos.
- El sistema catalítico es robusto, eficiente y tolerante a varios grupos funcionales.
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