Related Experiment Video
Updated: Sep 23, 2025
06:49
Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
Published on: April 22, 2016
12.0K
In Situ Alkyl Radical Recycling-Driven Decoupled Electrophotochemical Deamination.
Kui Wang1, Xiaoyu Liu1, Siyu Yang1
1Shandong Provincial Key Laboratory of Molecular Engineering, State Key Laboratory of Biobased Material and Green Papermaking, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, People's Republic of China.
Organic Letters
|May 12, 2022
Summary
This study introduces a novel electrophotocatalytic deaminative alkylation method for sustainable synthesis. The key innovation is the in situ recycling of alkyl radicals, enabling efficient molecular functionalization.
Area of Science:
- Organic Chemistry
- Sustainable Chemistry
- Photocatalysis
Background:
- Molecular electrophotocatalysis offers a sustainable route for chemical synthesis.
- Developing efficient catalytic systems for radical generation and utilization is crucial.
Purpose of the Study:
- To demonstrate a versatile electrophotocatalytic deaminative alkylation approach.
- To investigate the mechanism and optimize the reaction conditions.
- To showcase the applicability in pharmaceutical synthesis.
Main Methods:
- Electrophotocatalytic deaminative alkylation using a novel system.
- Mechanistic studies involving in situ radical recycling.
- Ligand modification and late-stage functionalization experiments.
Main Results:
- Successful proof-of-concept for the electrophotocatalytic deaminative alkylation.
- Identification of in situ alkyl radical recycling as the key mechanistic feature.
- Demonstration of ligand modification and late-stage functionalization of pharmaceuticals.
Conclusions:
- The developed electrophotocatalytic method is a powerful tool for sustainable synthesis.
- In situ recycling of alkyl radicals is essential for the reaction's efficiency.
- The approach shows significant potential for practical applications in drug discovery and development.
Related Concept Videos
01:02Radical Reactivity: Electrophilic Radicals
2.0K
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...
2.0K
01:16Radical Reactivity: Nucleophilic Radicals
2.2K
Radicals adjacent to electron-donating groups are called nucleophilic radicals. These radicals readily react with electrophilic alkenes. The SOMO–LUMO interactions are the driving force for the reaction, where the high-energy SOMO of the electron-rich, nucleophilic radicals interacts with the low-energy LUMO of the electron-deficient, electrophilic alkenes. Such SOMO–LUMO interactions are the basis of reactive radical traps, affecting the selectivity in radical reactions. For...
2.2K
00:51Radical Formation: Elimination
1.9K
Another method of radical formation is the elimination process. It is the opposite of the addition route and is driven by the instability of the radical. For example, as depicted in Figure 1, dibenzoyl peroxide yields a pair of unstable radicals upon homolysis. Given its instability, this radical spontaneously undergoes elimination via a C–C bond cleavage to form a relatively more stable phenyl radical. The mechanism involves cleavage of the bond between the α and β positions...
1.9K
01:11Radical Reactivity: Overview
2.2K
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...
2.2K
01:10Radical Reactivity: Steric Effects
2.0K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
Along with electronic...
2.0K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.9K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.9K