Flavone Analogues as Antimicrobial Agents.

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Antimicrobial Drug Discovery

Background:

• Growing antimicrobial resistance necessitates novel therapeutic agents.
• Existing antimicrobials face challenges with toxicity and side effects.
• Need for potent, less toxic, and cost-effective antimicrobial compounds.

Purpose of the Study:

• Develop novel synthetic antimicrobial agents, specifically 3-substituted flavone/flavanone derivatives.
• Synthesize compounds with significant potency and low toxicity for antibacterial and antifungal applications.

Main Methods:

• Synthesis of two series: 3-methyl flavanone and 3-hydroxy flavone derivatives.
• Structural elucidation using UV, IR, 1H-NMR, 13C-NMR, and mass spectrometry.
• In vitro antimicrobial screening via cup plate method to determine zones of inhibition.

Main Results:

• Successfully synthesized and characterized 20 novel compounds (10 each of 3-methyl flavanone and 3-hydroxy flavone derivatives).
• Screened compounds against 3 Gram-positive, 3 Gram-negative, and 2 fungal strains.
• Identified specific derivatives with notable antimicrobial activity.

Conclusions:

• Several 3-hydroxy flavone and 3-methyl flavanone derivatives demonstrated potent antimicrobial activity.
• 3-hydroxy flavones were particularly effective against Gram-negative bacteria.
• 3-methyl flavanones showed significant activity against Gram-positive bacteria.