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Acoplamiento reductivo de nitroarenos y HCHO para la síntesis general de etano-1,2-diaminas funcionales mediante un

Jia-Lu Sun, Huanfeng Jiang, Pierre H Dixneuf¹

¹Université de Rennes, CNRS, ISCR UMR 6226, 35000 Rennes, France.

Journal of the American Chemical Society

|July 7, 2023

Resumen

Un nuevo método sintetiza N,N-diarylethane-1,2-diamines utilizando un catalizador de un solo átomo de cobalto (Co_SA-N/NC) y nitroarenos y formaldehído fácilmente disponibles. Este proceso eficiente ofrece una amplia compatibilidad del sustrato y la reutilización del catalizador.

Área de la Ciencia:

Catálisis
Síntesis orgánica
Ciencias de los materiales

Sus antecedentes:

La síntesis selectiva de N,N'-diarilethane-1,2-diaminas es un reto.
Los métodos existentes a menudo carecen de eficiencia o de alcance de sustrato.

Objetivo del estudio:

Desarrollar un método general y eficiente para la síntesis de N,N'-diariletano-1,2-diaminas.
Para utilizar un nuevo catalizador bifuncional de cobalto de un solo átomo (Co_SA-N/NC).

Principales métodos:

Acoplamiento reductivo directo de nitroarenos y formaldehído mediante el catalizador Co_SA-N/NC.
Estudios mecánicos que incluyen átomos individuales de cobalto anclados en N (CoN₄) y soporte de carbono dopado en N.
Las etapas de adición cíclica y hidrodeoxigenación de demanda de electrones inversa de 1,3-dipolar.

Principales resultados:

Síntesis exitosa de N,N'-diarilethane-1,2-diaminas con buena compatibilidad de sustrato y funcionalidad.
Demostrada capacidad de reutilización del catalizador y alta eficiencia paso/átomo.
Elucidado el mecanismo catalítico que involucra bloques de construcción generados "in situ".

Conclusiones:

El catalizador Co_SA-N/NC proporciona un método general, eficiente y reutilizable para sintetizar diaminas valiosas.
La reducción de nitroareno controlada por catalizadores a bloques de construcción específicos abre caminos para nuevas transformaciones químicas.

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