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Aprovechando la transferencia de electrones mediada por aniones radicales para el acoplamiento cruzado catalizado por

Shuo Wu¹, Chia-Jung Yang², Mu-Jeng Cheng²

¹Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States.

Journal of the American Chemical Society

|December 29, 2025

Resumen

Este estudio introduce un nuevo método catalizado por el cobre que utiliza el anión radical de dióxido de carbono (CO2•) para acoplar eficientemente los bromuros de alquilo. Este enfoque supera las limitaciones en la transferencia de un solo electrón para aplicaciones más amplias en la síntesis orgánica.

Área de la Ciencia:

Química orgánica
Catálisis
La Química Radical

Sus antecedentes:

Las reacciones de acoplamiento cruzado catalizadas por cobre son vitales en la síntesis orgánica.
La transferencia lenta de un solo electrón del cobre a los haluros de alquilo es una limitación clave.
El desarrollo de métodos eficientes para la funcionalización de C ((sp3) es crucial.

Objetivo del estudio:

Para superar el cuello de botella de la transferencia lenta de un solo electrón en la catálisis del cobre.
Desarrollar una nueva estrategia para la funcionalización eficiente del bromuro de alquilo.
Para permitir la formación de enlaces C(sp3) -N, C(sp3) -S y C(sp3) -C.

Principales métodos:

Generación de aniones radicales de dióxido de carbono (CO2•−) a través de la activación C-H catalizada por Cu del formato.
Utilizando CO2•− para la transferencia eficiente de un solo electrón a los bromuros de alquilo.
Acoplamiento de radicales alquilo con diversos nucleófilos.

Principales resultados:

Formación exitosa de enlaces C ((sp3) -N, C ((sp3) -S y C ((sp3) -C con buenos a excelentes rendimientos.
Amplio alcance del sustrato que incluye bromuros de alquilo no activados y varios nucleófilos.
Síntesis demostrada a escala de decagrama con rentabilidad y simplicidad.

Conclusiones:

El protocolo desarrollado ofrece una estrategia distinta y eficiente para el acoplamiento cruzado catalizado por cobre.
Este método supera las limitaciones anteriores en la cinética de transferencia de un solo electrón.
Permite la optimización de reacciones fáciles, la síntesis de bibliotecas y la diversificación de las moléculas de fármacos en etapas tardías.

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