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Acoplamiento hidrodeoxigenativo y transformación de aldehídos en un marco de imida/hidruro de titanio tetranuclear

Yat-Ming So¹, Ching Tat To¹, Murali Mohan Guru¹

¹Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, Wako 351-0198, Japan.

Journal of the American Chemical Society

|July 22, 2023

Resumen

Este estudio introduce un nuevo complejo de titanio para el acoplamiento hidrodeoxigenativo de aldehídos aromáticos, formando bibenzilos. Este método ofrece una nueva vía para la formación de enlaces carbono-carbono sin reactivos de sacrificio.

Área de la Ciencia:

Química organometálica
Catálisis
Síntesis orgánica

Sus antecedentes:

La formación de enlaces carbono-carbono es crucial en la síntesis orgánica.
Los métodos existentes a menudo requieren reactivos de sacrificio o condiciones duras.
El desarrollo de sistemas catalíticos eficientes para reacciones de acoplamiento está en curso.

Objetivo del estudio:

Informar sobre un nuevo método para el acoplamiento hidrodeoxigenativo de aldehídos aromáticos.
Para utilizar un complejo tetranuclear de imida/hidruro de titanio derivado de N2.
Para explorar la formación de enlaces C-C utilizando compuestos carbonílicos con este complejo.

Principales métodos:

Síntesis y caracterización del complejo tetranuclear de imida/hidruro de titanio (Cp'Ti) 4 (μ3-NH) 2 (μ-H) 4).
Reacción del complejo con aldehídos aromáticos para acoplamiento hidrodeoxigenativo.
Reacciones adicionales bajo el aire para formar hidrobenzamidas y complejos de oxo de titanio.

Principales resultados:

Se logró un acoplamiento hidrodeoxigenativo sin precedentes de aldehídos aromáticos a bibenzilos.
Demostró el papel de los ligandos hidruro e imuro en el acoplamiento reductor y la hidrogenación.
Funcionalización exhibida de las unidades de imida sin reactivos de sacrificio.

Conclusiones:

El complejo tetranuclear de imida/hidruro de titanio sirve como plataforma para la formación de enlaces C-C.
Este marco permite la activación y la funcionalidad de N2.
El estudio presenta un nuevo enfoque catalítico para la síntesis de bibenzilos a partir de aldehídos.

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