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La adición de radicales de transferencia de átomos mediados por luz visible a través del enfriamiento oxidativo y
Carl-Johan Wallentin1, John D Nguyen, Peter Finkbeiner
1Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA.
Journal of the American Chemical Society
|April 11, 2012
Resumen
La fotocatálisis de luz visible permite la adición de radicales de transferencia atómica (ATRA) de haloalcanos y perfluoroalquilo yoduros a alquenos y alquinas. Los investigadores utilizaron ambas vías de enfriamiento oxidativo y reductor para aplicaciones sintéticas versátiles.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- La fotocatálisis por fotocatálisis.
- Las reacciones radicales.
Sus antecedentes:
- La adición radical de transferencia atómica (ATRA) es una reacción crucial en la síntesis orgánica.
- La fotocatálisis con luz visible ofrece una alternativa sostenible y eficiente a los métodos tradicionales.
- El desarrollo de nuevos sistemas fotocatalíticos amplía el alcance y la aplicabilidad de ATRA.
Objetivo del estudio:
- Para desarrollar reacciones ATRA mediadas por luz visible utilizando fotocatalizadores.
- Explorar las vías de enfriamiento reductivo y oxidativo para ATRA.
- Para ampliar el alcance del sustrato y las condiciones de reacción para ATRA.
Principales métodos:
- Se utilizaron fotocatalizadores de iridio y rutenio para el ATRA mediado por luz visible.
- Se empleó el apagado oxidativo de [Ir{dF(CF(3))ppy}(2)(dtbbpy) ]PF(6).
- Se utiliza el apagado reductivo de [Ru(bpy) ((3)) ]Cl ((2) con ascorbato de sodio.
Principales resultados:
- Se logró con éxito la ATRA de haloalcanos a alquenos y alquinas a través del enfriamiento oxidativo.
- Eficazmente realizado ATRA de ioduros de perfluoroalquilo en alceno y alquino a través de enfriamiento reductor.
- Demostró la naturaleza complementaria de las vías de enfriamiento oxidativo y reductivo.
Conclusiones:
- La fotocatálisis de luz visible proporciona una plataforma versátil para las reacciones ATRA.
- La elección de la vía de enfriamiento (oxidativa o reductiva) permite un control predecible sobre los resultados de la reacción.
- Este trabajo expande la utilidad sintética de ATRA para la construcción de moléculas complejas.
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