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Las reacciones de acoplamiento cruzado anidro heteroarilo-heteroarilo, Suzuki-Miyaura, habilitadas por el borato de

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|August 20, 2021
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Resumen

Este estudio presenta un nuevo método para los acoplamientos cruzados Suzuki-Miyaura de compuestos heteroariles difíciles. Las condiciones optimizadas utilizan ésteres borónicos de neopentilo y trimetilsilanolato de potasio para reacciones eficientes.

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Área de la Ciencia:

  • Química orgánica
  • Química sintética
  • Catálisis

Sus antecedentes:

  • El acoplamiento Suzuki-Miyaura es una reacción vital en la síntesis orgánica.
  • El acoplamiento de los compuestos heteroariles refractarios sigue siendo un desafío importante.
  • Los métodos existentes a menudo sufren de bajos rendimientos o condiciones adversas.

Objetivo del estudio:

  • Desarrollar condiciones de reacción eficientes para los acoplamientos cruzados de heteroarilo-heteroarilo Suzuki-Miyaura refractarios.
  • Para permitir el acoplamiento de una amplia gama de socios heteroariles ricos en π y deficientes en π.
  • Para lograr altos rendimientos en tiempos de reacción cortos.

Principales métodos:

  • Utilizó ésteres heteroarilborónicos de neopentilo como nucleófilos.
  • Utilizan bromuros y cloruros de heteroarilo como electrófilos.
  • Se utiliza trimetilsilanolato de potasio (TMSOK) como base soluble en condiciones anidras.
  • Se añade borato de trimetilo para aumentar las velocidades de reacción y prevenir el envenenamiento del catalizador.

Principales resultados:

  • Se han acoplado exitosamente diversos ésteres y haluros de boro heteroarilico.
  • Se obtienen buenos rendimientos para el desafío de los acoplamientos heteroarilo-heteroarilo.
  • Reacciones completas en tiempos de reacción cortos (3 horas o menos).

Conclusiones:

  • Desarrolló un método robusto para los acoplamientos cruzados Suzuki-Miyaura refractarios.
  • La adición de borato de trimetilo juega un papel crucial en la eficiencia de la reacción.
  • El método ofrece una herramienta versátil para sintetizar moléculas heteroaromáticas complejas.