Synthesis of 2-Furyl[(4-aralkyl)-1-piperazinyl]methanone derivatives as suitable antibacterial agents with mild cytotoxicity

Pak J Pharm Sci. 2018 Nov;31(6):2477-2485.

Abstract

The aim of the present research work was synthesis of some 2-furyl[(4-aralkyl)-1-piperazinyl]methanone derivatives and to ascertain their antibacterial potential. The cytotoxicity of these molecules was also checked to find out their utility as possible therapeutic agents. The synthesis was initiated by reacting furyl(-1-piperazinyl)methanone (1) in N,N-dimethylformamide (DMF) and lithium hydride with different aralkyl halides (2a-j) to afford 2-furyl[(4-aralkyl)-1-piperazinyl]methanone derivatives (3a-j). The structural confirmation of all the synthesized compounds was done by IR, EI-MS, 1H-NMR and 13C-NMR spectral techniques and through elemental analysis. The results of in vitro antibacterial activity of all the synthesized compounds were screened against Gram-negative (S. typhi, E. coli, P. aeruginosa) and Gram-positive (B. subtilis, S. aureus) bacteria and were found to be decent inhibitors. Amongst the synthesized molecules, 3e showed lowest minimum inhibitory concentration MIC = 7.52±0.μg/mL against S. Typhi, credibly due to the presence of 2-bromobenzyl group, relative to the reference standard, ciprofloxacin, having MIC = 7.45±0.58μg/mL.

Publication types

  • Comparative Study

MeSH terms

  • Animals
  • Anti-Bacterial Agents / chemical synthesis*
  • Anti-Bacterial Agents / pharmacology*
  • Anti-Bacterial Agents / toxicity
  • Carbon-13 Magnetic Resonance Spectroscopy
  • Cattle
  • Ciprofloxacin / pharmacology
  • Gram-Negative Bacteria / drug effects*
  • Gram-Negative Bacteria / growth & development
  • Gram-Positive Bacteria / drug effects*
  • Gram-Positive Bacteria / growth & development
  • Hemolysis / drug effects
  • Microbial Sensitivity Tests
  • Molecular Structure
  • Piperazines / chemical synthesis*
  • Piperazines / pharmacology*
  • Piperazines / toxicity
  • Proton Magnetic Resonance Spectroscopy
  • Spectrometry, Mass, Electrospray Ionization
  • Structure-Activity Relationship

Substances

  • Anti-Bacterial Agents
  • Piperazines
  • Ciprofloxacin