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Constructing Cyclic Peptides Using an On-Tether Sulfonium Center
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Liquid-Phase Peptide Synthesis Enabled by Electrochemical Amide Bond Formation
Yohei Okada1, Shingo Shinjo-Nagahara1, Kazuhiro Chiba2
1Department of Applied Biological Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.
Methods in Molecular Biology (Clifton, N.J.)
|June 18, 2025
Summary
Electrochemical amide bond formation offers a greener alternative to chemical synthesis. This method uses electrode reactions to activate carboxylic acids, enabling efficient peptide synthesis without traditional coupling reagents.
Area of Science:
- Organic Chemistry
- Electrochemistry
- Synthetic Chemistry
Background:
- Traditional amide bond formation often relies on chemical coupling reagents, generating waste.
- Electrochemical methods offer a sustainable alternative using electrons as traceless redox reagents.
Purpose of the Study:
- To develop an electrochemical method for amide bond formation.
- To enable liquid-phase peptide synthesis without conventional coupling reagents.
Main Methods:
- Utilizing electrode reactions to generate a triphenylphosphine radical cation.
- Activating carboxylic acids via phosphonium ion intermediates for amide coupling.
Main Results:
- Successful synthesis of peptides through electrochemical amide bond formation.
- Demonstration of a waste-free and traceless redox process.
Conclusions:
- Electrochemical amide bond formation is a viable and sustainable synthetic strategy.
- This approach provides a novel pathway for liquid-phase peptide synthesis.
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