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Formación de enlaces N-N intermoleculares catalizados por P^III/P^{V: Acoplamiento reductor selectivo cruzado de}

Gen Li¹, Steven P Miller², Alexander T Radosevich¹

¹Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Journal of the American Chemical Society

|September 2, 2021

Resumen

Un nuevo método catalizado por organofosforo permite la síntesis de hidrazinas asimétricas a través de la formación selectiva de enlaces N-N. Este enfoque utiliza un catalizador de fosfatano y hidrosilano para el acoplamiento reductivo eficiente de nitroarenos y anilinas.

Área de la Ciencia:

Química orgánica
Catálisis
Metodología sintética

Sus antecedentes:

Las hidrazinas asimétricas son valiosos intermedios sintéticos.
Los métodos eficientes y selectivos para la formación de enlaces N-N son cruciales en la síntesis orgánica.

Objetivo del estudio:

Desarrollar un nuevo método catalizado por organofosforos para sintetizar hidrazinas asimétricas.
Para lograr el acoplamiento reductivo N-N intermolecular selectivo.

Principales métodos:

Utilizó un pequeño anillo de fosfaciclo (fosfetano) como catalizador.
Se utiliza hidrosilano como reductor terminal.
Investigó el acoplamiento reductivo de nitroarenos y anilinas.

Principales resultados:

Se ha logrado la síntesis de hidrazinas asimétricas con buena quimioselectividad.
Se ha demostrado una excelente tolerancia funcional del grupo.
Los estudios mecanicistas revelaron una cascada de reacción catalítica autotandem que involucra el ciclo P^III/P^VO.

Conclusiones:

El método descrito proporciona una ruta eficiente a las hidrazinas asimétricas.
El catalizador organofosforado facilita los eventos de reducción secuencial para la formación de enlaces N-N.
Esta metodología ofrece una herramienta valiosa para los químicos sintéticos.

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