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Generación de nitrenos a partir de iminofosforanos: Facilitación de la amidación C(sp2)-H por cierre de anillo para

Yunzhi Xie¹, Yongkang Hu², Shijie Liu³

¹College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China.

Organic letters

|January 16, 2026

Resumen

Este estudio presenta un método eficiente para sintetizar oxindoles disustituidos utilizando iminofosforanos como precursores de nitrenos para reacciones de amidación C-H. El protocolo escalable permite la síntesis de moléculas complejas, incluidos productos naturales y candidatos a fármacos.

Área de la Ciencia:

Química Orgánica
Química Sintética
Química Medicinal

Sus antecedentes:

Los nitrenos son intermediarios reactivos cruciales en la síntesis de compuestos heterocíclicos a través de la amidación C-H.
El desarrollo de precursores de nitrenos eficientes es vital para avanzar en las metodologías sintéticas.

Objetivo del estudio:

Establecer un método eficiente para la preparación de oxindoles disustituidos.
Utilizar iminofosforanos como precursores de nitrenos eficaces para la amidación C-H por cierre de anillo.

Principales métodos:

Activación de iminofosforanos utilizando ácido meta-cloroperoxibenzoico (m-CPBA).
Generación de intermediarios de nitrenos para reacciones de amidación C-H.
Cálculos de teoría de funcionales de densidad (DFT) para estudios mecanísticos.

Principales resultados:

Se desarrolló un protocolo eficiente para la síntesis de oxindoles disustituidos.
El método demostró una excelente escalabilidad a cantidades de gramos.
Aplicación exitosa en la síntesis total de coixspirolactama A y un antagonista de CRTH2.

Conclusiones:

Los iminofosforanos son precursores de nitrenos eficaces para la amidación C-H.
El protocolo desarrollado ofrece utilidad sintética práctica y escalabilidad.
Este método facilita la síntesis de compuestos heterocíclicos complejos.

Palabras clave:

iminofosforanos precursores de nitrenos amidación C-H oxindoles disustituidos síntesis orgánica

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