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Síntesis total asimétrica de 11-deoxitetrodotoxina, un congénero natural que se encuentra en la naturaleza
Toshio Nishikawa1, Masanori Asai, Minoru Isobe
1Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
Journal of the American Chemical Society
|June 27, 2002
Resumen
Este estudio detalla la primera síntesis total de 11-deoxitetrodotoxina, un análogo de la toxina del pez globo. La síntesis estereocontrolada proporciona una nueva ruta a esta compleja molécula y sus derivados.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Química sintética de la química sintética.
- La neurociencia es la neurociencia.
Sus antecedentes:
- La tetrodotoxina es un potente bloqueador de los canales de sodio que se encuentra en los peces globo.
- Los esfuerzos sintéticos anteriores han sido limitados, con solo tetrodotoxina racémica sintetizada.
- Se logró una síntesis estereocontrolada de (-)-5,11-dideoxytetrodotoxina en 1999.
Objetivo del estudio:
- Para lograr la primera síntesis total de 11-deoxitetrodotoxina.
- Desarrollar una ruta sintética estereocontrolada para los análogos de tetrodotoxina.
- Para explorar cuestiones biológicamente relevantes asociadas con la tetrodotoxina.
Principales métodos:
- La síntesis comenzó con un intermediario de alcohol alílico.
- Los pasos clave incluyeron la epoxidación, la isomerización, la reducción de la oxidación, la ozonólisis y la adición estereoselectiva de acetílidos.
- Se empleó un nuevo método de guanidinilación y los siguientes pasos de desprotección.
Principales resultados:
- Se sintetizó con éxito la 11-deoxitetrodotoxina, un análogo de origen natural.
- Estableció una vía sintética altamente estereocontrolada.
- La síntesis involucró un intermediario de lactona completamente funcional.
Conclusiones:
- Este trabajo representa la primera síntesis total de la 11-deoxitetrodotoxina.
- La estrategia sintética desarrollada ofrece una ruta viable para acceder a los análogos de la tetrodotoxina.
- La síntesis proporciona una plataforma para una mayor investigación de la actividad biológica de la tetrodotoxina.
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