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Síntesis total concisa, asimétrica y estereocontrolada de las estefacidinas A, B y la notoamida B

Gerald D Artman¹, Alan W Grubbs, Robert M Williams

¹Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.

Journal of the American Chemical Society

|April 26, 2007

Resumen

Este estudio presenta síntesis totales asimétricas concisas de los metabolitos fúngicos estafacidina A, estafacidina B y notoamida B. Se emplearon nuevas estrategias sintéticas y calentamiento por microondas para la preparación eficiente de estas moléculas complejas.

Área de la Ciencia:

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

Sus antecedentes:

Los metabolitos de hongos como la estefacidina A, la estefacidina B y la notoamida B poseen estructuras complejas con actividades biológicas potenciales.
Las rutas sintéticas eficientes y escalables son cruciales para una mayor investigación y posibles aplicaciones terapéuticas de estos compuestos.

Objetivo del estudio:

Desarrollar síntesis totales concisas y asimétricas de (-) -estefacidina A, (+) -estefacidina B y (+) -notoamida B.
Establecer nuevas metodologías sintéticas aplicables a la construcción de productos naturales complejos.

Principales métodos:

Síntesis asimétrica utilizando el éster metílico de prolina (R) -alilo.
Desarrollo de una ruta revisada para el núcleo de piranoindol.
Aplicación de la metatesis cruzada para la introducción de grupos funcionales.
ciclización SN2' para la formación de un sistema biciclo puenteado [2.2.2].
Síntesis asistida por microondas para optimizar los tiempos de reacción y los rendimientos.

Principales resultados:

Se lograron síntesis totales asimétricas exitosas y concisas de (-) -estefacidina A, (+) -estefacidina B y (+) -notoamida B.
Los principales intermediarios se sintetizaron de manera eficiente utilizando el calentamiento por microondas, lo que condujo a una mejora de los rendimientos.
Se validó una nueva estrategia de metatesis cruzada y la ciclización SN2' para la construcción de las intrincadas arquitecturas moleculares.

Conclusiones:

Las estrategias sintéticas desarrolladas proporcionan un acceso eficiente a importantes metabolitos fúngicos.
Las metodologías empleadas ofrecen versatilidad para la síntesis de productos naturales relacionados.
Este trabajo contribuye al campo de la síntesis de productos naturales y el descubrimiento de fármacos.

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