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Development of Inhibitors of Protein-protein Interactions through REPLACE: Application to the Design and Development Non-ATP Competitive CDK Inhibitors
Published on: October 26, 2015
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Csp{3) -Csp{3) exclusivo frente a Csp{2) -Csp{3) Eliminación reductiva de Pt{IV) regido por las restricciones de
Eric G Bowes1, Shrinwantu Pal1, Jennifer A Love1
1Department of Chemistry, The University of British Columbia , Vancouver, British Columbia V6T 1Z1, Canada.
Journal of the American Chemical Society
|December 18, 2015
Resumen
Se observó una eliminación reductiva selectiva del etano a partir de un complejo rígido de platino. Esta reactividad sin precedentes surge porque la rigidez del ligando eleva la barrera de energía para las reacciones competidoras, permitiendo la formación de enlaces Csp ((3) -Csp ((3).
Área de la Ciencia:
- Química orgánica de los metales
- Catálisis
- Mecanismos de reacción
Sus antecedentes:
- Los complejos de platino (IV) son intermedios versátiles en los ciclos catalíticos.
- La eliminación reductora (RE) es un paso clave en muchas transformaciones catalíticas.
- El control de la selectividad en la eliminación reductiva es crucial para una síntesis eficiente.
Objetivo del estudio:
- Investigar el mecanismo de eliminación reductiva selectiva del etano (Csp3) -Csp3) RE) de un complejo PtIV.
- Comprender la influencia de la rigidez del andamio del ligando en la competencia entre Csp(3) -Csp(3) RE y Csp(2) -Csp(3) RE.
- Para lograr una reactividad sin precedentes en la química de Pt.
Principales métodos:
- Síntesis y caracterización de complejos de platino con variada flexibilidad de ligando.
- Estudios experimentales relacionados con la abstracción de bromuro y la termólisis.
- Estudios teóricos computacionales (por ejemplo, DFT) para analizar vías de reacción y barreras energéticas.
Principales resultados:
- Se ha observado un RE selectivo Csp(3) -Csp(3) de etano a partir de un complejo Pt(IV) rígido.
- Se ha demostrado que la rigidez del andamio del ligando aumenta la barrera para el Csp2−Csp3 RE.
- Se identificó una reactividad sin precedentes debido a la influencia de la rigidez del ligando.
Conclusiones:
- El diseño de ligandos, específicamente la rigidez del andamio, es una herramienta poderosa para controlar la selectividad en la eliminación reductiva de Pt (IV).
- Los ligandos rígidos pueden suprimir las vías no deseadas de Csp2 - Csp3 RE, favoreciendo a Csp3 - Csp3 RE.
- Este trabajo abre nuevas vías para el desarrollo de procesos catalíticos selectivos en los que intervienen los intermediarios Pt (IV).
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