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Glicosilación estereoselectiva para el ensamblaje de 1,2-cis-aminoglucósidos mediante catálisis cooperativa de

Hongze Li¹, Dakang Zhang¹, Chong Li¹

¹Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States.

Journal of the American Chemical Society

|November 25, 2024

Resumen

Un nuevo método catalizado por hierro logra una glicosilación selectiva exclusiva de 1,2-cis-α, formando enlaces cruciales de 1,2-cis-aminoglucósidos en carbohidratos complejos. Este enfoque catalítico eficiente es escalable para la síntesis de glicanos y glucoconjugados.

Área de la Ciencia:

Química de los carbohidratos
Síntesis orgánica
Catálisis

Sus antecedentes:

La glicosilación es clave para sintetizar carbohidratos complejos.
El logro de vínculos estereoselectivos 1,2-cis-α-glicosídicos sigue siendo un desafío.
Los enlaces aminoglucósidos son componentes vitales de muchas moléculas bioactivas.

Objetivo del estudio:

Desarrollar un nuevo método catalítico para la glucosilación exclusivamente selectiva de 1,2-cis-α.
Para sintetizar una amplia variedad de enlaces 1,2-cis-aminoglucósidos.
Para aclarar el mecanismo de esta nueva reacción de glicosilación.

Principales métodos:

Utilizó un nuevo catalizador de hierro para las reacciones de glicosilación.
Se emplearon estudios mecanicistas para comprender la vía de reacción.
Investigó el mecanismo cooperativo de transferencia de átomos que involucra a los donantes de glucosilo, los aceptadores y los oxidantes.

Principales resultados:

Se ha logrado una selectividad exclusiva de 1,2-cis-α en la glicosilación.
Se han ensamblado con éxito diversos enlaces 1,2-cis-aminoglucósidos en glicanos complejos y glucoconjugados.
Demostró la eficacia del catalizador con una amplia gama de sustratos y la escalabilidad al nivel de multigrama.

Conclusiones:

El método desarrollado catalizado por hierro proporciona una vía robusta y selectiva para los enlaces 1,2-cis-aminoglicósidos.
El mecanismo catalítico único facilita la transferencia cooperativa de átomos para una alta estereoselectividad.
Este enfoque ofrece una estrategia escalable y eficiente para sintetizar estructuras complejas de carbohidratos.

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