Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

7.7K
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.
7.7K
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

3.5K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.5K
Cycloaddition Reactions: Overview01:16

Cycloaddition Reactions: Overview

2.5K
Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
2.5K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.0K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.0K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.3K
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...
3.3K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Uncovering Electron-Transfer Mechanisms of Sulfur Anion Photosensitizers with Intramolecular Charge Transfer.

Journal of the American Chemical Society·2026
Same author

Quaternary Carbons from Amines and Acids.

Journal of the American Chemical Society·2026
Same author

FRE-GAN : Full-resolution efficient convolutional generative adversarial network for retinal vessel segmentation.

Neural networks : the official journal of the International Neural Network Society·2026
Same author

Global Research Trends in Gastric Cancer Epigenetics From 2005 to 2025.

Cureus·2026
Same author

Study on an Extended Surfactant Heavy Oil Viscosity Reduction Emulsification System.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Alternating Current-Promoted Copper Catalysis for the Construction of Alkynyl Thioethers.

The Journal of organic chemistry·2026

Video Experimental Relacionado

Updated: Jun 21, 2025

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function
05:57

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function

Published on: April 26, 2024

359

Optimización programada de corriente alterna de las transformaciones de enlaces C-H catalizadas por Cu

Li Zeng1, Qinghong Yang1, Jianxing Wang1

  • 1Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China.

Science (New York, N.Y.)
|July 11, 2024
PubMed
Resumen

La electrosíntesis de corriente alterna programada (pAC) ofrece un nuevo método para la síntesis química. Esta técnica mejora las reacciones catalizadas por cobre, superando los métodos de corriente continua y proporcionando conocimientos mecanicistas.

Más Videos Relacionados

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS

Published on: June 20, 2014

13.8K
Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

24.3K

Videos de Experimentos Relacionados

Last Updated: Jun 21, 2025

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function
05:57

Author Spotlight: In Silico Creation and Impact of Carbonylated Amino Acids on Protein Structure and Function

Published on: April 26, 2024

359
Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS

Published on: June 20, 2014

13.8K
Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

24.3K

Área de la Ciencia:

  • La electroquímica
  • Síntesis orgánica
  • Catálisis

Sus antecedentes:

  • La electrosíntesis de corriente continua (CC) está bien establecida en la industria.
  • La electrosíntesis de corriente alterna (CA) tiene potencial, pero carece de desarrollo en aparatos, principios y aplicaciones.

Objetivo del estudio:

  • Introducir un protocolo para la electrosíntesis programada por corriente alterna (pAC).
  • Explorar la aplicación de pAC en las reacciones catalizadas por cobre.
  • Obtenga una visión mecánica del comportamiento del catalizador bajo diferentes formas de onda.

Principales métodos:

  • Desarrolló un protocolo para la electrosíntesis programada de CA (pAC) con corrientes, frecuencias y relaciones de trabajo ajustables.
  • Aplicó formas de onda pAC representativas a las reacciones de escisión de enlaces C-H catalizadas por cobre.
  • Dinámica del catalizador investigado bajo diferentes condiciones de forma de onda.

Principales resultados:

  • La electrosíntesis de pAC facilitó la escisión de enlaces C-H catalizados por cobre en reacciones de acoplamiento cruzado y difuncionalización.
  • Logró un rendimiento superior en comparación con la electrosíntesis de CC y la oxidación química.
  • Variaciones dinámicas del catalizador observadas que proporcionan una comprensión mecanicista.

Conclusiones:

  • La electrosíntesis AC programada es una herramienta versátil para desafiar las transformaciones orgánicas.
  • pAC ofrece ventajas sobre los métodos tradicionales de CC para reacciones catalíticas específicas.
  • El estudio proporciona información mecanicista valiosa sobre la electrocatálisis a través del control de la forma de onda.