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Aminación intermolecular homobencílica controlada por catalizador C ((sp³) -H para la síntesis de las

Erwan Brunard¹, Vincent Boquet¹, Tanguy Saget¹

¹Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France.

Journal of the American Chemical Society

|February 22, 2024

Resumen

Los investigadores desarrollaron un nuevo método para la aminación selectiva de enlaces C-H utilizando un catalizador de rodio. Esto proporciona acceso directo a valiosas beta-ariletilaminas, importantes en el descubrimiento de fármacos.

Área de la Ciencia:

Química orgánica
Catálisis
Química medicinal

Sus antecedentes:

La funcionalización del enlace C-H es crucial para sintetizar moléculas complejas.
La aminación selectiva de enlaces C ((sp3) -H no activados sigue siendo un desafío importante en la síntesis orgánica.

Objetivo del estudio:

Desarrollar un nuevo sistema catalítico para la aminación intermolecular selectiva de enlaces C-H homobencílicos.
Proporcionar una vía sintética directa a las valiosas beta-ariletilaminas.

Principales métodos:

Utilizó un sulfamato a medida como fuente de nitrógeno.
Se utiliza un catalizador de tetracarboxilato de rodio simétrico en C4.
Se han realizado estudios de regioselectividad e investigaciones computacionales (modelo de tensión de activación, análisis de descomposición energética).

Principales resultados:

Se ha logrado una aminación intermolecular selectiva de enlaces homobencílicos C ((sp3) -H no activados.
Demostró un amplio alcance con más de 30 ejemplos y una alta regioselectividad (relación homobenzil/benzil hasta 35:1).
Los estudios computacionales revelaron un mecanismo concertado con un estado de transición asincrónico, impulsado por interacciones orbitales e interacciones no covalentes.

Conclusiones:

La reacción catalizada por rodio desarrollada ofrece un acceso directo y eficiente a las beta-ariletilaminas.
La regioselectividad se rige por las interacciones orbitales entre el nitreno de rodio y el enlace C-H, influenciadas por las interacciones no covalentes en la bolsa catalítica.
Esta metodología tiene un potencial significativo para aplicaciones químicas medicinales.

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