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Hidrogenación asimétrica de fosfinatos de enol di y trisubstituidos con complejos de iridio ligado N,P

Pradeep Cheruku¹, Jarle Diesen, Pher G Andersson

¹Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, Sweden.

Journal of the American Chemical Society

|March 29, 2008

Resumen

La hidrogenación asimétrica catalizada por iridio de los fosfinatos de enol produce productos altamente enantioselectivos. Este método produce eficientemente alcoholes quirales, ofreciendo una alternativa a la hidrogenación de cetonas tradicional.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
Catalización asimétrica por catálisis asimétrica.
Química orgánica sintética y orgánica.

Sus antecedentes:

Los fosfinatos de enol son versátiles intermediarios sintéticos.
La hidrogenación asimétrica es crucial para la síntesis de compuestos quirales.
El desarrollo de sistemas catalíticos eficientes para la síntesis enantioselectiva está en curso.

Objetivo del estudio:

Para investigar la hidrogenación asimétrica catalizada por iridio de los fosfinatos de enol di- y trisubstituidos.
Para lograr una alta enantioselectividad y conversión para un amplio alcance de sustrato.
Explorar la utilidad de los productos de fosfinato resultantes en la síntesis de alcoholes quirales.

Principales métodos:

Utilizando catalizadores basados en iridio para reacciones asimétricas de hidrogenación.
Empleando varios fosfinatos de enol di- y trisubstituidos como sustratos.
Analizando la enantiopuridad del producto utilizando cromatografía quiral.

Principales resultados:

Se han logrado excelentes enantioselectividades (hasta >99% ee) para una amplia gama de fosfinatos de enol aromáticos y alifáticos.
Se observa la conversión completa de sustratos bajo condiciones de reacción optimizadas.
Demostró la fácil transformación de los fosfinatos hidrogenados en alcoholes quirales con la estereoquímica preservada.
Se hidrogenaron con éxito los fosfinatos de enol puramente sustituidos por alquilo para producir valiosos alcoholes quirales.

Conclusiones:

La hidrogenación asimétrica catalizada por iridio de los fosfinatos de enol es un método altamente efectivo para generar compuestos quirales.
Este enfoque proporciona acceso a los alcoholes quirales que son difíciles de sintetizar a través de otras rutas.
Los fosfinatos de enol sirven como valiosos precursores para la síntesis estereoselectiva de los alcoholes.

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