Video Experimental Relacionado

Updated: Feb 16, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

Interrogando Pd (II) Metátesis de aniones utilizando una sonda química bifuncional: un interruptor de

John J Molloy¹, Ciaran P Seath¹, Matthew J West¹

¹Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K.

Journal of the American Chemical Society

|December 20, 2017

Resumen

Este estudio revela cómo el control de la metátesis de ligandos en los complejos de paladio (II) dirige las reacciones de acoplamiento cruzado. Esto permite la síntesis selectiva de los productos Suzuki-Miyaura o Mizoroki-Heck y los carbociclos complejos.

Área de la Ciencia:

Química organometálica
Química orgánica sintética

Sus antecedentes:

La metátesis de ligandos de los complejos de paladio es crucial para las reacciones de acoplamiento cruzado.
Comprender y controlar estos eventos de metástasis es clave para dirigir las vías de reacción.

Objetivo del estudio:

Para investigar la metátesis de aniones de haluro → OH de los complejos de paladio.
Identificar los factores que influyen en la metástasis y controlar las vías de acoplamiento cruzado.
Para demostrar la utilidad sintética en las reacciones en cascada.

Principales métodos:

Utilizó el vinilBPin como una sonda química bifuncional.
Se han estudiado vías de acoplamiento dependientes del paladio.
Las variables analizadas que afectan a la metástasis aniónica y a la transmitación.

Principales resultados:

Variables clave identificadas que controlan la metástasis de aniones halogenados → OH.
Control demostrado sobre la transmisión de organoboron, cambiando entre las vías Suzuki-Miyaura y Mizoroki-Heck.
Se logra la síntesis selectiva de carbociclos borilados y no borilados, incluidas estructuras similares a los esteroides, a través de reacciones en cascada.

Conclusiones:

La metátesis de ligandos proporciona un interruptor para controlar los resultados del acoplamiento cruzado catalizado por el paladio.
Esta estrategia permite una síntesis eficiente de diversos andamios carbocíclicos.

Más Videos Relacionados

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry

Published on: October 6, 2023

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

Videos de Conceptos Relacionados

Olefin Metathesis Polymerization: Overview

Olefin Metathesis Polymerization: Overview

Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...

ortho–para-Directing Activators: –CH3, –OH, –&NoBreak;NH2, –OCH3

ortho–para-Directing Activators: –CH₃, –OH, –⁠NH₂, –OCH₃

All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride

Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.

Diazonium Group Substitution: –OH and –H

Diazonium Group Substitution: –OH and –H

Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.