Video Experimental Relacionado

Updated: Mar 10, 2026

A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis

A Microwave-Assisted Direct Heteroarylation of Ketones Using Transition Metal Catalysis

Published on: February 16, 2020

Reacciones de Derivados de la Base de Tröger con Intermediarios de Arino

Sundaram Suresh¹

¹School of Chemistry, University of Hyderabad, Central University P.O., Hyderabad 500046, India.

The Journal of organic chemistry

|February 6, 2026

Resumen

Este estudio detalla una reacción novedosa en la que la base de Tröger racémica (TB) sufre una apertura de anillo y N-arilación. Este método produce eficientemente productos N-arilados a través de un intermediario de arino, produciendo incluso compuestos enantiopuros.

Área de la Ciencia:

Química Orgánica
Química Sintética

Sus antecedentes:

La base de Tröger (TB) es un andamio quiral único.
La química de arinos ofrece vías sintéticas versátiles.

Objetivo del estudio:

Desarrollar una nueva ruta sintética para derivados de la base de Tröger N-arilados.
Explorar el mecanismo que involucra intermediarios de arino y apertura de anillo.

Principales métodos:

Reacción de la base de Tröger racémica con haluros de arilo.
Se utilizó tert-butóxido de potasio (t-BuOK) en dimetilsulfóxido (DMSO) como sistema de reactivos.
Se investigó la formación y el papel de los intermediarios de arino generados in situ.

Principales resultados:

Se logró la apertura del anillo de la base de Tröger con N-arilación concomitante.
Se obtuvieron productos N-arilados en rendimientos de hasta el 67%.
Se demostró la eliminación del puente de metileno a través de un intermediario de arino.
Se amplió el alcance de la reacción para sintetizar compuestos enantiopuros a través de la reorganización del puente de metileno.

Conclusiones:

El método desarrollado proporciona una vía eficiente hacia derivados de la base de Tröger N-arilados.
El mecanismo de reacción implica la generación de arino y la posterior apertura del anillo.
La metodología permite la síntesis de compuestos quirales valiosos.

Más Videos Relacionados

A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones

A Direct, Regioselective and Atom-Economical Synthesis of 3-Aroyl-N-hydroxy-5-nitroindoles by Cycloaddition of 4-Nitronitrosobenzene with Alkynones

Published on: January 21, 2020

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

Published on: January 19, 2016

Videos de Conceptos Relacionados

Nucleophilic Aromatic Substitution: Elimination–Addition

Nucleophilic Aromatic Substitution: Elimination–Addition

Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is...

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic S_N1

Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...

Preparation of Alkynes: Alkylation Reaction

Preparation of Alkynes: Alkylation Reaction

Introduction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.

Nucleophilic Aromatic Substitution: Addition–Elimination (SNAr)

Nucleophilic Aromatic Substitution: Addition–Elimination (S_NAr)

Nucleophilic substitution in aromatic compounds is feasible in substrates bearing strong electron-withdrawing substituents positioned ortho or para to the leaving group. The reaction proceeds via two steps: the addition of the nucleophile and the elimination of the leaving group.
The reaction begins with an attack of the nucleophile on the carbon that holds the leaving group. This results in the delocalization of the π electrons over the ring carbons. The resonance interaction between...

Factors Affecting α-Alkylation of Ketones: Choice of Base

Factors Affecting α-Alkylation of Ketones: Choice of Base

α-Alkylation of ketones is achieved in the presence of alkyl halides and a base. The reaction proceeds via the formation of an enolate ion followed by nucleophilic substitution. The choice of base employed is essential as it is the key factor in determining the reaction outcome.
The reaction involving bases like EtO− whose conjugate acid EtOH (pKa = 15.9) is stronger than the ketone (pKa = 19.2) results in an equilibrium mixture with higher ketone concentration. As a consequence,...

Aldol Condensation with β-Diesters: Knoevenagel Condensation

Aldol Condensation with β-Diesters: Knoevenagel Condensation

The Knoevenagel condensation is an aldol-type reaction involving the condensation of aldehydes or ketones with active methylene compounds such as β-diesters to produce substituted olefins.