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Dos vías de metátesis de enlace σ reversibles para la formación de enlaces boro-palladio: síntesis selectiva de

Naohiro Kirai¹, Jun Takaya, Nobuharu Iwasawa

¹Department of Chemistry, Tokyo Institute of Technology, O-okayama, Tokyo 152-8551, Japan.

Journal of the American Chemical Society

|February 7, 2013

Resumen

Este estudio revela dos vías controlables para la activación de enlaces boro-boro utilizando catalizadores de paladio. La elección del ligando dirige estas reacciones, permitiendo la síntesis selectiva de valiosos complejos de borilpaladio.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
La catálisis de la catálisis.
Química del silicio-química del silicio

Sus antecedentes:

Los complejos de paladio son cruciales en la catálisis.
La activación del enlace boro-boro es un desafío.
La activación del enlace B-B es clave para la síntesis de compuestos de organoboron.

Objetivo del estudio:

Para demostrar dos vías reversibles de metatesis de enlace sigma para la activación del enlace B-B.
Para lograr la síntesis selectiva de complejos de borilpaladio.
Comprender el papel de los ligandos de fosfina en el control de las vías de reacción.

Principales métodos:

Reacción de los complejos eta(2)-(Si-H)Pd(0) con el complejo B(2)pin(2).
Utilizando el comportamiento fluxional de los enlaces Si-H.
El empleo de varios ligandos de fosfina para controlar la selectividad.

Principales resultados:

Demostró dos vías reversibles de metástasis de enlace sigma para la activación del enlace B-B.
Identificó el comportamiento fluxional de los enlaces Si-H que conectan las vías.
Logró la síntesis selectiva de dos tipos de complejos de borilpaladio de cinco coordenadas a través del control de ligandos.

Conclusiones:

La elección del ligando de fosfina es crítica para el control de las vías de activación del enlace B-B.
Este trabajo proporciona un método para la síntesis selectiva de complejos de borilpaladio.
Los hallazgos avanzan en la comprensión de los mecanismos de activación de enlaces B-B en la catálisis del paladio.

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