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Hidroaminación dirigida y regiocontrolada de alquenos no activados mediante protodepaladación

John A Gurak¹, Kin S Yang¹, Zhen Liu¹

¹Department of Chemistry, The Scripps Research Institute , 10550 North Torrey Pines Road, La Jolla, California 92037, United States.

Journal of the American Chemical Society

|April 20, 2016

Resumen

Este estudio informa de una nueva hidroaminación catalizada por el paladio de alquenos. El método utiliza un grupo de dirección para la síntesis regiocontrolada de ácidos gamma amino funcionalizados.

Área de la Ciencia:

Química orgánica
Catálisis
Metodología sintética

Sus antecedentes:

Las reacciones de hidroaminación son cruciales para sintetizar compuestos que contienen nitrógeno.
La dirección de las estrategias de grupo mejora la selectividad regional y el control de las transformaciones orgánicas.
La catálisis de paladio ofrece vías versátiles para la formación de enlaces C-N.

Objetivo del estudio:

Desarrollar una hidroaminación regiocontrolada de alquenos no activados.
Para utilizar un grupo de dirección extraíble para mejorar el control de la reacción.
Para sintetizar ácidos gamma-amino altamente funcionales.

Principales métodos:

La hidroaminación catalizada por el acetato de paladio (II).
Utilizando un grupo de dirección bidentario removible en el nucleófilo de nitrógeno.
Utilizando alquenos terminales y internos no activados.

Principales resultados:

Se ha conseguido una hidroaminación dirigida y controlada regional de varios alquenos.
Compatibilidad demostrada con diversos nucleófilos de nitrógeno.
Síntesis de aminoácidos gamma funcionalizados con buen rendimiento y alta regioselectividad.

Conclusiones:

El método desarrollado proporciona un acceso eficiente a valiosos derivados de los aminoácidos gamma.
La estrategia de grupo de dirección controla efectivamente la regioquímica y evita reacciones secundarias como la eliminación de beta-hidruro.
Este enfoque catalizado por el paladio ofrece una herramienta robusta para la química orgánica sintética.

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