Antimicrobial Activities of Some Amino Derivatives of 5,7-dibromo-2-methyl-8-hydroxyquinoline

Biol Pharm Bull. 2000 Feb;23(2):257-8. doi: 10.1248/bpb.23.257.


The bromine atoms of the title compound, 5,7-dibromo-2-methyl-8-hydroxyquinoline were replaced by the requisite amino compound to afford 6 amino derivatives viz: bis(diethylamino)-, bis(dibutylamino)-, bis(dicyclohexylamino)-, dipyrolidino-, dipiperidino- and dipiperazino derivatives. The antimicrobial activity of these compounds were investigated against selected gram positive (Staphylococcus aureus and Bacillus subtilis), gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa) and yeast (Candida albicans). All the compounds showed significant activity against the test microorganisms, from 5-30 times compared to the title compound. It was observed that all derivatives were more effective against gram positive bacteria. No correlation has been established between the minimum inhibitory (MIC) concentrations of the derivatives and the structural modifications.

MeSH terms

  • Anti-Bacterial Agents / pharmacology
  • Anti-Infective Agents / chemical synthesis*
  • Anti-Infective Agents / pharmacology
  • Antifungal Agents / chemical synthesis
  • Antifungal Agents / pharmacology
  • Bacteria / drug effects
  • Candida / drug effects
  • Culture Media
  • Hydroxyquinolines / chemical synthesis*
  • Hydroxyquinolines / pharmacology
  • Microbial Sensitivity Tests


  • Anti-Bacterial Agents
  • Anti-Infective Agents
  • Antifungal Agents
  • Culture Media
  • Hydroxyquinolines