Related Experiment Video
Updated: Sep 16, 2025

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
Published on: November 29, 2018
Photoinduced Formal Intermolecular Ene-Yne Metathesis: Regioselective Synthesis of Chromene Derivatives via an
Jie Yao1, Junhua Hu1, Siru Chen1
1Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China.
Abstract:
By leveraging synergistic photochemical and phosphate ester catalysis, we developed a photoinduced formal ene-yne metathesis protocol enabling regioselective chromene construction via concurrent alkene C═C and imine C═N bond reorganization. A series of unexplored chromenes were synthesized in the E-configuration via simultaneous formation of four new bonds. Gram-scale synthesis and mechanistic studies were conducted. The metal-free C═C cleavage of alkenes sheds light on the transformation.
More Related Videos
Related Concept Videos
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview
Thermal Electrocyclic Reactions: Stereochemistry
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.
Cycloaddition Reactions: MO Requirements for Photochemical Activation
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
![[DPEPhosbcpCu]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)
