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Construcción supramolecular de un aldehído-ciclobutano a través del estado sólido: combinación de formación de imina

Shalisa M Oburn¹, Dale C Swenson¹, S V Santhana Mariappan¹

¹Department of Chemistry, University of Iowa , Iowa City, Iowa 52245-1297, United States.

Journal of the American Chemical Society

|June 13, 2017

Resumen

Este estudio demuestra la síntesis orgánica en estado sólido utilizando el autoensamblaje metálico-orgánico y la química imina. Un nuevo método logra la fotodimerización estereoselectiva [2+2] de alquenos, lo que produce ciclobutanos funcionalizados de alta pureza.

Área de la Ciencia:

Química orgánica
Ciencias de los materiales
Química supramolecular

Sus antecedentes:

La síntesis de estado sólido ofrece ventajas en selectividad y eficiencia.
Las estructuras metal-orgánicas pueden dirigir las reacciones fotoquímicas.
La formación de iminas es una herramienta versátil para la funcionalidad molecular.

Objetivo del estudio:

Desarrollar una nueva vía sintética en estado sólido para los ciclobutanos.
Para utilizar el autoensamblaje metálico-orgánico para el control de la fotodimerización.
Para lograr la cicloadición estereoselectiva [2+2] a través de polímeros de coordinación.

Principales métodos:

Utilizando la formación de imina reversible para funcionalizar el transcinamaldehído con un grupo pirídico.
Utilizando iones de plata para el autoensamblaje metálico-orgánico en un polímero de coordinación 1D.
Inducción de la fotodimerización intermolecular [2+2] dentro del conjunto de estado sólido.

Principales resultados:

El polímero de coordinación 1D facilitó la fotodimerización estereoselectiva [2+2] del alqueno funcionalizado por piridil.
La reacción de cicloadición procedió en rendimiento cuantitativo.
La posterior eliminación del grupo pirídico produjo el ciclo butano funcionalizado con aldehído objetivo (α-truxilaldehído).

Conclusiones:

Se estableció una estrategia sintética robusta de estado sólido que combina el autoensamblaje y la química imina.
Este método proporciona una vía altamente estereoselectiva y eficiente para los ciclobutanos funcionalizados.
El enfoque destaca el potencial de los polímeros de coordinación para dirigir las transformaciones fotoquímicas en estado sólido.

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