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Reacciones de acoplamiento de monóxido de carbono a través de un par de Lewis frustrado derivado de η2 - formalborano
Qiu Sun1, Constantin G Daniliuc1, Klaus Bergander1
1Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
Journal of the American Chemical Society
|September 13, 2021
Resumen
Un nuevo sistema η2 - formal borano actúa como un par de Lewis frustrado, permitiendo el acoplamiento de unidades de monóxido de carbono. Esto da lugar a endiolatos borilados únicos y a endiolatos de silicio macrocíclicos raros.
Área de la Ciencia:
- Química del organoboron
- Frustrado por la química de la pareja de Lewis
- Reacciones de carbonilación
Sus antecedentes:
- Los pares de Lewis frustrados (FLP) son especies reactivas que permiten transformaciones químicas únicas.
- Las reacciones de carbonilación son cruciales para sintetizar compuestos orgánicos valiosos.
- La química del boro ofrece diversas aplicaciones en catálisis y ciencias de los materiales.
Objetivo del estudio:
- Síntesis y caracterización de un nuevo sistema de β-formil borano.
- Para investigar la reactividad de este sistema como una pareja frustrada C/B Lewis.
- Explorar la formación de nuevos compuestos que contienen carbono-oxígeno y silicio.
Principales métodos:
- La carbonilación de un par de Lewis P/BH vecino fue frustrante.
- Reacciones con dióxido de carbono, fenilisocianato y B ((C6 F5) 3.
- Caracterización de los productos de reacción mediante técnicas espectroscópicas.
Principales resultados:
- Se sintetizó con éxito el sistema de borano η2 -formilo (3).
- El compuesto 3 demostró una actividad frustrada del par C/B Lewis con CO2 y fenilisocianato.
- Se logró el acoplamiento de dos unidades derivadas de CO, formando un endiolato doblemente borilado (13).
- Se obtuvo un raro endiolato de silicio macrocíclico después del tratamiento con silano.
Conclusiones:
- El sistema de β-formil borano desarrollado es un reactivo versátil para la activación y el acoplamiento de CO.
- Este trabajo expande el alcance de la química de pares de Lewis frustrados.
- Se sintetizaron nuevos endiolatos borilados y endiolatos de silicio, destacando nuevas vías sintéticas.
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