Video Experimental Relacionado

Updated: Jun 22, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphos^Ph Complexes

Published on: April 10, 2015

Síntesis asimétrica mediada por quiral-auxiliar de complejos de polipiridil de rutenio tris-heterolepticos

Lei Gong¹, Seann P Mulcahy, Klaus Harms

¹Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg, Germany.

Journal of the American Chemical Society

|June 27, 2009

Resumen

Este estudio introduce una nueva síntesis asimétrica para complejos de rutenio quiral-en-metal utilizando auxiliares quirales. Estos auxiliares proporcionan una excelente inducción asimétrica y se pueden sustituir con la retención de la configuración.

Área de la Ciencia:

Coordinación Química de la Coordinación
Síntesis asimétrica de síntesis.
Química organometálica Química orgánica de los metales.

Sus antecedentes:

Los complejos quiral-en-metal son cruciales en la catálisis y la ciencia de los materiales.
Desarrollar estrategias eficientes de síntesis asimétrica para estos complejos sigue siendo un desafío.
Los ligandos de achiral 2,2'-bipiridina son bloques de construcción comunes en la química de la coordinación.

Objetivo del estudio:

Introducir una nueva estrategia para la síntesis asimétrica de complejos quiral-en-metal de rutenio.
Para utilizar nuevos auxiliares quirales para la inducción altamente asimétrica.
Para demostrar la estabilidad y el potencial de sustitución de los complejos sintetizados.

Principales métodos:

Empleando isopropil-2-(2'-hidroxifenil) oxazolinas desprotonadas como ligandos quirales del bidentado.
Utilizando estos auxiliares en la química de coordinación con las 2,2'-bipiridinas achirales para formar complejos [Ru (pp) (pp) (pp') (pp') (+2) ].
Investigando la sustitución de los auxiliares quirales en condiciones ácidas con la retención de la configuración.

Principales resultados:

Síntesis asimétrica exitosa de complejos de rutenio quiral-en-metal.
Demostración de una excelente inducción asimétrica mediada por los auxiliares quirales.
Confirmación de la retención completa de la configuración durante la sustitución de los auxiliares en presencia de ácido.

Conclusiones:

La estrategia desarrollada ofrece una ruta efectiva a los complejos de rutenio quiral-en-metal enriquecidos enantioméricamente.
Los auxiliares quirales empleados son versátiles, proporcionando un alto control estéreo y propiedades sintonizables.
Este método abre caminos para el diseño de nuevos catalizadores y materiales de rutenio quiral.

Más Videos Relacionados

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate

Published on: June 21, 2017

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Videos de Conceptos Relacionados

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction 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...

Prochirality

Prochirality

The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...

Radical Anti-Markovnikov Addition to Alkenes: Overview

Radical Anti-Markovnikov Addition to Alkenes: Overview

The addition of hydrogen bromide to alkenes in the presence of hydroperoxides or peroxides proceeds via an anti-Markovnikov pathway and yields alkyl bromides.

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.

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...