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Una síntesis concisa y total del saliniketal B

Jun Liu¹, Jef K De Brabander

¹Department of Biochemistry and Harold C. Simmons Comprehensive Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA.

Journal of the American Chemical Society

|September 3, 2009

Resumen

Desarrollamos una síntesis eficiente de 11 pasos para el saliniketal B, un producto natural marino. Este nuevo método permite futuros estudios sobre su actividad biológica y mecanismo de acción.

Área de la Ciencia:

Química orgánica es la química orgánica.
Síntesis de Productos Naturales.
Química Medicinal La Química Medicinal es el campo de la Química Medicinal.

Sus antecedentes:

Saliniketal B es un producto natural marino derivado de los actinomicetos.
Actúa como un inhibidor de la inducción de la ornitina descarboxilasa mediada por el éster de forbol.
El mecanismo de acción del saliniketal B es actualmente desconocido, lo que requiere más estudios estructura-función.

Objetivo del estudio:

Desarrollar una síntesis concisa, enantioselectiva y altamente eficiente del saliniketal B.
Proporcionar una ruta escalable para obtener cantidades suficientes de saliniketal B para futuras investigaciones biológicas.
Explorar nuevas metodologías sintéticas para la construcción de productos naturales complejos.

Principales métodos:

Se utilizó la cicloisomerización mediada por platino (II) de alkinediolos para construir el sistema de anillos de dioxabiciclo [3.2.1]octano del núcleo.
Empleó una estrategia de acoplamiento de fragmentos de aldol altamente selectiva influenciada por un grupo metilo gamma-esteroégeno.
Desarrolló una secuencia de una sola olla que involucra desilación, fragmentación de dihidropiranona y amidación.

Principales resultados:

El saliniketal B fue sintetizado en una secuencia de 11 pasos.
El rendimiento total del saliniketal B fue del 23% de los materiales de partida disponibles en el mercado.
El acoplamiento convergente de dos fragmentos complejos, ensamblados en 7 y 8 pasos (rendimientos del 39% y 45% respectivamente), fue clave para la síntesis.

Conclusiones:

La vía sintética reportada es eficiente y enantioselectiva, proporcionando acceso al saliniketal B.
La estrategia sintética destaca las nuevas aplicaciones de las reacciones mediadas por platino (II) y los acoplamientos selectivos de fragmentos.
Esta síntesis facilita futuros estudios de la relación estructura-función del saliniketal B como inhibidor de la ornitina descarboxilasa.

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