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Updated: Jun 24, 2026

Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes

Chemoselective Preparation of 1-Iodoalkynes, 1,2-Diiodoalkenes, and 1,1,2-Triiodoalkenes Based on the Oxidative Iodination of Terminal Alkynes

Published on: September 12, 2018

Un proceso eficiente para las reacciones de acoplamiento cruzado C-N catalizadas por PD de yoduros de arilo:

Brett P Fors¹, Nicole R Davis, Stephen L Buchwald

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

Journal of the American Chemical Society

|April 8, 2009

Resumen

Este estudio supera el efecto inhibidor del yoduro de sodio (NaI) en las reacciones de acoplamiento cruzado C-N catalizadas por el paladio. Mediante el uso de disolventes específicos y ligandos de biarilfosfina, se logró un acoplamiento eficiente de yoduros de arilo con varias aminas.

Área de la Ciencia:

Química orgánica es la química orgánica.
La catálisis de la catálisis.
Metodología sintética de la metodología sintética.

Sus antecedentes:

Las reacciones de acoplamiento cruzado C-N catalizadas por paladio son cruciales para la formación de enlaces carbono-nitrógeno.
Los yoduros de arilo a menudo son sustratos desafiantes en estas reacciones debido a las posibles reacciones secundarias y la inhibición del catalizador.
El yoduro de sodio (NaI) puede inhibir las reacciones de acoplamiento cruzado catalizadas por el paladio.

Objetivo del estudio:

Investigar y superar el efecto inhibidor de NaI en las reacciones de acoplamiento cruzado C-N catalizadas por Pd de ioduros de arilo.
Desarrollar métodos sintéticos eficientes para acoplar ioduros de arilo con diversas aminas.
Ampliar el alcance del acoplamiento cruzado C-N para incluir las heteroarilaminas y los heteroarilioduros.

Principales métodos:

Utilizando catalizadores de paladio con ligandos específicos de la biarilfosfina.
Empleando sistemas de disolventes donde los subproductos de yoduro son insolubles.
Condiciones de reacción de cribado para optimizar el rendimiento y la eficiencia.

Principales resultados:

Se identificó un efecto inhibidor significativo de NaI en el acoplamiento cruzado C-N catalizado por Pd de ioduros de arilo.
Desarrolló un método utilizando subproductos insolubles de yoduro para lograr un acoplamiento eficiente de yoduros de arilo, comparable a los cloruros de arilo y los bromuros.
Reaccionó con éxito ioduros de arilo con varias aminas primarias y secundarias en altos rendimientos.
Se han demostrado altos rendimientos en el acoplamiento de heteroarilaminas y heteroariliodidas.

Conclusiones:

Se puede superar el efecto inhibidor de NaI en el acoplamiento cruzado C-N catalizado por Pd de ioduros de arilo.
El acoplamiento cruzado C-N eficiente y de alto rendimiento de los yoduros de arilo se puede lograr utilizando sistemas de disolventes adaptados y ligandos de biarilfosfina.
La metodología desarrollada amplía el alcance del acoplamiento cruzado C-N para sintetizar moléculas complejas que contienen enlaces C-N.

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