Novel effective antibacterial small-molecules against Staphylococcus and Enterococcus strains

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Antimicrobial Research

Background:

• Antibiotic resistance is a growing global health threat, necessitating the development of new antibacterial agents.
• Existing antibiotic therapies face challenges due to increasing microbial resistance.
• Novel small-molecule antibacterials are crucial to combat resistant bacterial infections.

Purpose of the Study:

• To synthesize and evaluate novel small-molecule compounds as potential antibacterial agents.
• To explore the structure-activity relationship of cyclopentaindole derivatives against bacterial pathogens.
• To identify lead compounds with potent antimicrobial activity.

Main Methods:

• Development of novel small-molecule antibacterials via a facile one-pot synthesis.
• Synthesis of cyclopentaindole core structures with various indole and cyclopentane substituents.
• Evaluation of synthesized compounds and indole substituted propene variants against *Staphylococcus aureus* and *Enterococcus* strains.

Main Results:

• Compounds featuring bromo cyclopentane and chloro indole substitutions demonstrated the highest efficacy.
• Identified lead compounds exhibited promising in vitro activity comparable to last-resort antibiotics.
• The novel compounds significantly contribute to the pipeline of potential small-molecule antibacterial drug candidates.

Conclusions:

• Novel small-molecule antibacterials based on the cyclopentaindole scaffold have been successfully developed.
• Specific substitutions (bromo cyclopentane, chloro indole) are key for potent antibacterial activity.
• These findings provide valuable candidates for further development in the fight against antibiotic resistance.