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Síntesis total de la N-metilwelwitindolinona D isonitrile y también de la N-metilwelwitindolinona
Vikram Bhat1, Kevin M Allan, Viresh H Rawal
1Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States.
Journal of the American Chemical Society
|March 31, 2011
Resumen
Los investigadores lograron la primera síntesis total de N-metilwelwitindolinona D isonitrile, un alcaloide complejo de indol. Este avance utilizó métodos novedosos para construir su intrincado núcleo de bicyclo[4.3.1]decane e instalar grupos funcionales clave.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Síntesis de Productos Naturales.
- Química Medicinal La Química Medicinal es un campo de estudio de la química medicinal.
Sus antecedentes:
- Los alcaloides indoles representan una clase significativa de productos naturales con diversas actividades biológicas.
- N-metilwelwitindolinona D isonitrile es un miembro complejo de esta familia, que presenta un núcleo único de biciclo[4.3.1]decano.
- La síntesis total de tales productos naturales complejos presenta desafíos significativos en la química orgánica.
Objetivo del estudio:
- Desarrollar una síntesis total concisa y eficiente de N-metilwelwitindolinona D isonitrile.
- Para establecer una ruta sintética para acceder a complejos alcaloides de indole que contienen biciclo [4.3.1]decano.
- Demostrar la viabilidad de las transformaciones químicas clave para construir el marco pentacíclico del producto natural.
Principales métodos:
- Acoplamiento alquilativo mediado por ácido de Lewis para el ensamblaje rápido de núcleos de carbono.
- Arilación enolada catalizada por paladio para la construcción de la estructura del núcleo.
- La oxidación del indole y la ciclización para formar el anillo final del pentaciclo.
- Reorganización de un aldehído a un isotiocianato seguido de desulfurado para instalar el grupo isonitril.
Principales resultados:
- Síntesis total exitosa y concisa de N-metilwelwitindolinona D isonitrile.
- Construcción eficiente del complejo núcleo de carbono de biciclo[4.3.1]decano.
- Demostración de una nueva estrategia sintética para esta clase de alcaloides indólicos.
- Instalación del grupo funcional isonitril característico.
Conclusiones:
- La ruta sintética desarrollada proporciona un método viable para acceder a la N-metilwelwitindolinona D isonitrile.
- Esta síntesis abre caminos para la preparación de análogos y alcalóides indoles complejos relacionados.
- El estudio destaca el poder de las metodologías sintéticas modernas en la síntesis de productos naturales.
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