Video Experimental Relacionado
Updated: Jul 15, 2026
10:51
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Catalizadores de Ru-pseudohalida de alta eficiencia para la metátesis de las olefinas
Jay C Conrad1, Henrietta H Parnas, Jennifer L Snelgrove
1Department of Chemistry, University of Ottawa, Ottawa ON, Canada K1N 6N5.
Journal of the American Chemical Society
|August 25, 2005
Resumen
Los catalizadores de rutenio con ligandos de aryloxide realizan eficientemente la metátesis de cierre de anillo. Estos catalizadores permiten una fácil eliminación de los residuos de rutenio, dando lugar a productos orgánicos puros.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Síntesis orgánica La síntesis orgánica.
Sus antecedentes:
- La metátesis de cierre de anillo (RCM) es una herramienta poderosa para la formación de moléculas orgánicas cíclicas.
- Los catalizadores eficientes son cruciales para la amplia aplicación de la RCM.
Objetivo del estudio:
- Desarrollar nuevos catalizadores de rutenio para la metatesis de cierre de anillo altamente eficiente.
- Para investigar la facilidad de eliminación de residuos de rutenio de los productos de reacción.
Principales métodos:
- Síntesis de complejos de alquilideno de rutenio con ligandos aryloxide "pseudohalide".
- Aplicación de estos complejos en la metátesis de cierre de anillos de sustratos de dieno y ene-yno.
- Análisis de la pureza del producto y los niveles de residuos de rutenio.
Principales resultados:
- Los complejos de rutenio demostraron una eficiencia catalítica excepcionalmente alta en las reacciones de RCM.
- La eliminación cromatográfica de los residuos de rutenio de los productos orgánicos fue inesperadamente fácil.
- Se obtuvieron altos rendimientos de productos orgánicos puros.
Conclusiones:
- Los catalizadores de rutenio con ligandos de aryloxide son muy efectivos para la RCM.
- La fácil eliminación de los residuos de rutenio simplifica la purificación del producto.
- Esta metodología ofrece una ruta conveniente a los compuestos orgánicos puros a través de RCM.
![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
Videos de Conceptos Relacionados
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
01:19Aldehydes and Ketones to Alkenes: Wittig Reaction Overview
The Wittig reaction is the conversion of carbonyl compounds-aldehydes and ketones-to alkenes using phosphorus ylides, or the Wittig reagent. The reaction was pioneered by Prof. Georg Wittig, for which he was awarded the Nobel Prize in Chemistry.
01:26Radical 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,...
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,...
01:13Olefin 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...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...