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Síntesis total de la (-) -corilagina
Hidetoshi Yamada1, Kohei Nagao, Kazutoyo Dokei
1School of Science and Technology, Kwansei Gakuin University, Sanda 669-1337, Japan. hidetosh@kwansei.ac.jp
Journal of the American Chemical Society
|May 29, 2008
Resumen
Los investigadores lograron la primera síntesis total de 1C4/B-ellagitaninas, que se caracterizan por una glucosa única en su anillo. Este avance utilizó un nuevo acoplamiento oxidativo y una ruta sintética para el puente de 3,6-hexahidroxydifenoil (HHDP).
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Síntesis de Productos Naturales.
- Química de los carbohidratos Química de los carbohidratos
Sus antecedentes:
- Las ellagitaninas son productos naturales complejos con diversas actividades biológicas.
- El puente 3,6-hexahidroxydiphenoyl (HHDP) es un motivo estructural clave en muchas ellagitaninas.
- Las ellagitaninas 1C4/B, caracterizadas por la glucosa invertida en el anillo, representan una subclase desafiante.
Objetivo del estudio:
- Para lograr la primera síntesis total de 1C4/B-ellagitanninas.
- Desarrollar nuevas metodologías sintéticas para la construcción del puente HHDP e incorporar glucosa invertida en anillo.
Principales métodos:
- Acoplamiento oxidativo de galatos simétricamente protegidos.
- La ruta sintética abierta temporalmente en anillo para la construcción del puente de 3,6-hexahidroxydifenoil (HHDP).
- Síntesis estereoselectiva y manipulación de derivados de la glucosa.
Principales resultados:
- El éxito de la síntesis total de una 1C4/B-ellagitannina.
- Demostración de una nueva estrategia de acoplamiento oxidativo para galatos.
- Desarrollo de una ruta eficiente a la porción HHDP con un núcleo de glucosa invertido en anillo.
Conclusiones:
- La estrategia sintética desarrollada permite el acceso a 1C4/B-ellagitanninas. previamente inaccesibles.
- Este trabajo proporciona una base para la síntesis de otras ellagitaninas complejas.
- La metodología abre nuevas vías en la síntesis de carbohidratos y productos naturales.
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