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Progreso hacia un motor molecular rotatorio de diseño racional y accionado químicamente.
T Ross Kelly1, Xiaolu Cai, Fehmi Damkaci
1E. F. Merkert Chemistry Center, Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, USA.
Journal of the American Chemical Society
|January 11, 2007
Resumen
Los investigadores tenían como objetivo la rotación unidireccional repetida en una máquina molecular utilizando el compuesto 7. Sin embargo, no se produjo la formación intramolecular de uretano, crucial para la rotación, lo que obstaculizó el progreso en la maquinaria molecular.
Área de la Ciencia:
- La maquinaria molecular es una maquinaria molecular.
- Se trata de una química supramolecular.
- Síntesis orgánica La síntesis orgánica es la síntesis orgánica.
Sus antecedentes:
- El prototipo 1 demostró 120 grados de rotación unidireccional impulsado por phosgene.
- Las máquinas moleculares basadas en triptíceno ofrecen potencial para el movimiento controlado.
Objetivo del estudio:
- Diseñar y sintetizar el compuesto 7 para la rotación unidireccional repetida.
- Para investigar el mecanismo de rotación inducida por fosgeno en un derivado del triptceno.
Principales métodos:
- Síntesis del compuesto 7 que involucra la adición de benzina, fotociclado de stilbeno y acoplamiento de Stille.
- Utilizado 4- ((dimetilamino) piridina (DMAP) para la entrega selectiva de fosgeno.
- Se ha investigado la formación intramolecular de uretano a través del 1,1'-carbonyldiimidazol.
Principales resultados:
- El compuesto 7 se sintetizó con éxito con DMAP para el relevo selectivo de fosgeno.
- La unidad del DMAP transmitió regioselectivamente 1,1'-carbonyldiimidazol, pero no el fosgeno.
- No se produjo la rotación del triptíceno, y la formación intramolecular de uretano no tuvo éxito.
Conclusiones:
- La vía de formación de uretano intramolecular diseñada falló en el compuesto 7.
- Las posibles razones de fallo incluyen enlaces de hidrógeno o interacciones de Bürgi-Dunitz que involucran a DMAP.
- Se necesita más investigación para superar las barreras conformacionales en las máquinas moleculares basadas en triptíceno.
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