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Funcionalización de anillos aromáticos por heteroátomos utilizando catalizadores activables por luz infrarroja

Tasuku Iba¹, Rinko Kobayashi¹, Taniyuki Furuyama²

¹Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.

The Journal of organic chemistry

|February 18, 2026

Resumen

Este estudio presenta un nuevo método para funcionalizar anillos aromáticos utilizando luz infrarroja cercana (NIR) y un fotocatalizador de ftalocianina. La reacción incorpora eficientemente heteroátomos como fósforo, azufre y boro en estructuras aromáticas.

Área de la Ciencia:

Química Orgánica
Fotoquímica

Sus antecedentes:

La luz infrarroja cercana (NIR) ofrece una profunda penetración en los tejidos, lo que la hace ideal para la síntesis orgánica avanzada.
El desarrollo de fotocatalizadores eficientes para reacciones impulsadas por NIR es crucial para expandir las capacidades sintéticas.

Objetivo del estudio:

Desarrollar un método novedoso para la funcionalización de anillos aromáticos por heteroátomos utilizando luz NIR.
Utilizar fotocatalizadores a base de ftalocianina para la generación de especies reactivas de oxígeno.

Principales métodos:

Se emplearon complejos de zinc de ftalocianina como fotocatalizadores activados por luz NIR.
Se investigó la generación de radicales de arilo a partir de derivados de arilhidrazina a través de oxígeno singlete (¹O₂).
Se utilizó clorhidrato de arilhidrazina para la incorporación estable y fácil de heteroátomos (P, S, B).

Principales resultados:

Se logró con éxito la incorporación de heteroátomos (P, S, B) en anillos aromáticos a través de intermedios de radicales de arilo.
Se demostró la transformación selectiva de colorantes fluorescentes.
Se mostró la viabilidad de la reacción en condiciones de blindaje, superando las limitaciones de la fotoquímica convencional.

Conclusiones:

Se desarrolló una nueva estrategia impulsada por luz NIR para la funcionalización de anillos aromáticos.
El método permite la incorporación eficiente y selectiva de heteroátomos utilizando precursores fácilmente disponibles.
Ofrece una plataforma versátil para la síntesis orgánica, particularmente para moléculas complejas y en condiciones desafiantes.

Palabras clave:

funcionalización de anillos aromáticos luz infrarroja cercana fotocatalizadores de ftalocianina incorporación de heteroátomos radicales de arilo química orgánica fotoquímica

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