Video Experimental Relacionado

Updated: Jul 20, 2026

Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols

Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols

Published on: April 4, 2014

Síntesis de motivos de propionato: reacciones en tándem diastereoselectivas que involucran procesos basados en

Y Guindon¹, K Houde, M Prévost

¹Institut de recherches cliniques de Montréal (IRCM), Bioorganic Chemistry Laboratory, 110 avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7. guindoy@ircm.qc.ca

Journal of the American Chemical Society

|August 30, 2001

Resumen

Este estudio introduce una nueva estrategia sintética utilizando Mukaiyama y las reacciones de transferencia de hidrógeno para crear motivos de propionato. El método ofrece un control preciso sobre la estereoquímica, produciendo productos específicos de síntesis, síntesis y anti-anti.

Área de la Ciencia:

Química orgánica es la química orgánica.
Síntesis estereoselectiva por síntesis.

Sus antecedentes:

Los motivos propionados son bloques de construcción cruciales en la síntesis orgánica.
El control de la estereoquímica en la síntesis de moléculas complejas sigue siendo un desafío significativo.

Objetivo del estudio:

Desarrollar una estrategia sintética estereoselectiva para los motivos de propionato.
Explorar la influencia de las condiciones de reacción en los resultados estereoquímicos.

Principales métodos:

Utilizando una reacción en tándem de Mukaiyama y una reacción de transferencia de hidrógeno.
Investigando los efectos de los grupos protectores y los ácidos de Lewis en la estereoselectividad.
El uso del efecto endocíclico para controlar las vías de reacción.

Principales resultados:

Logró excelentes rendimientos y diastereoselectividad en la síntesis de motivos de propionato.
Generó con éxito motivos de propionato sin-sin y sin-anti.
Desarrolló un enfoque complementario que produce anti-anti-productos a través de la alilación radical.

Conclusiones:

La secuencia sintética propuesta proporciona un acceso eficiente a diversos estereoisómeros de motivos de propionato.
Demostró la utilidad de controlar la complicación y los efectos endocíclicos para el control estereoquímico.

Más Videos Relacionados

Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators

Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators

Published on: November 27, 2015

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Versatile CO₂ Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

Videos de Conceptos Relacionados

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.

Radical Reactivity: Overview

Radical Reactivity: Overview

Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired molecule. These three...

Radical Reactivity: Electrophilic Radicals

Radical Reactivity: Electrophilic Radicals

Radicals adjacent to electron‐withdrawing groups are called electrophilic radicals. These radicals readily react with nucleophilic alkenes. For example, the malonate radical, in which the radical center is flanked by two electron‐withdrawing groups, reacts readily with butyl vinyl ether, which consists of an electron‐donating oxygen substituent. The reaction between electrophilic malonate radical and nucleophilic vinyl ether is favored because the radical has a low‐energy SOMO, which interacts...

Radical Substitution: Allylic Bromination

Radical Substitution: Allylic Bromination

In organic synthesis, the formation of products can be altered by changing the reaction conditions. For example, a dibromo addition product is formed when propene is treated with bromine at room temperature. In contrast, propene undergoes allylic substitution in non-polar solvents at high temperatures to give 3-bromopropene. In order to avoid the addition reaction, the bromine concentration must be kept as low as possible throughout the reaction. This can be achieved using N-bromosuccinimide...

Pericyclic Reactions: Introduction

Pericyclic Reactions: Introduction

Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic rearrangements are...