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Recent Developments on Coumarin Hybrids as Antimicrobial Agents.

Sijongesonke Peter1, Lunga Linda Sibali2

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Summary

Coumarin hybrid compounds show promising antimicrobial activity against resistant microbes like S. aureus and C. albicans. Structural modifications, such as halogenation, significantly enhance their efficacy, guiding future drug development.

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Area of Science:

  • Medicinal Chemistry
  • Pharmacology
  • Drug Discovery

Background:

  • Rising antimicrobial resistance (AMR) threatens global health, necessitating novel therapeutic agents.
  • Coumarin, a naturally occurring compound, offers favorable physicochemical properties and diverse biological activities, making it a promising scaffold for drug development.
  • Hybridization of coumarin with other pharmacophores is a strategic approach to enhance antimicrobial efficacy and overcome resistance.

Purpose of the Study:

  • To review and synthesize current literature on coumarin-based hybrid compounds with antimicrobial properties.
  • To analyze the structure-activity relationships (SAR) of these hybrids to identify key structural features for enhanced antimicrobial activity.
  • To provide insights for future research and development of coumarin-derived drugs for treating microbial infections.

Main Methods:

  • Comprehensive literature search of open-access articles on coumarin hybrid drugs published between 2024 and 2025.
  • Utilized academic search engines including Google, Google Scholar, ScienceDirect, and Scopus.
  • Focused on studies reporting antimicrobial activity and structure-activity relationship data.

Main Results:

  • Coumarin hybrids demonstrate significant antimicrobial activity, notably against Staphylococcus aureus and Candida albicans.
  • Structure-activity relationship analysis indicates that specific functional groups (e.g., halogens, bulky aromatics, nitro, hydroxyl) enhance the binding affinity of coumarin hybrids to microbial targets.
  • These modifications influence the interaction with amino acid residues, contributing to improved efficacy.

Conclusions:

  • Coumarin-based hybrid compounds represent a promising class of antimicrobials with tunable activity based on structural modifications.
  • Further pre-clinical and clinical investigations are warranted to fully evaluate the therapeutic potential of these novel agents.
  • The SAR findings provide a foundation for rational drug design of next-generation coumarin-derived antimicrobials.