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Updated: May 22, 2025
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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
Published on: June 20, 2014
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Unlocking Enol-Ugi-Derived Conformationally Restricted Peptidomimetic Motifs
José Luis Ramiro1, Jesús Díaz1, Ana G Neo1
1Laboratory of Bioorganic Chemistry & Membrane Biophysics (L.O.B.O.). Departamento de Química Orgánica e Inorgánica, Universidad de Extremadura, Cáceres 10003 Spain.
The Journal of Organic Chemistry
|March 13, 2025
Summary
The enol-Ugi condensation reaction creates enamine peptidomimetics. Noncovalent interactions dictate their shape, with some adducts mimicking peptide turns for drug discovery.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Computational Chemistry
Background:
- The enol-Ugi condensation is a multicomponent reaction for synthesizing enamine peptidomimetics.
- Understanding the conformational behavior of these adducts is crucial for their application in drug design.
Purpose of the Study:
- To investigate factors influencing the conformational behavior of enol-Ugi adducts.
- To explore the role of noncovalent interactions in conformational restriction.
- To assess the potential of enol-Ugi adducts in mimicking peptidic structures.
Main Methods:
- Density Functional Theory (DFT) calculations were employed.
- Non-covalent Interaction (NCI) analysis was utilized.
- Conformational analysis of three distinct enol-Ugi adducts was performed.
Main Results:
- Noncovalent interactions, such as hydrogen bonds and π-π stacking, significantly restrict conformational flexibility.
- Six-membered cyclic enamines (6 and 7) showed moderate rotational freedom.
- An indanone-derived enamine (8) exhibited a locked conformation, mimicking a retropeptidic turn.
Conclusions:
- Tailoring enol-Ugi adducts can lead to structures that mimic biologically relevant peptidic motifs.
- These findings offer new strategies for drug discovery and design.
- The study underscores the importance of noncovalent interactions in controlling molecular conformation.
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