Medicinal Chemistry Research

, Volume 24, Issue 5, pp 1857–1868 | Cite as

Synthesis, antibacterial evaluation, and SAR study of some novel 3-aryl/heteroaryl-9-methyl-1,2,4-triazolo-[4,3-a]-quinoline derivatives

  • M. Kumar
  • V. KumarEmail author
  • G. K. Gupta
Original Research


A series of new quinolin-2-yl moiety linked hydrazones of various aryl/heteroaryl aldehydes has been prepared which on treatment with iodobenzene diacetate in dichloromethane yielded novel triazolo[4,3-a]quinoline derivatives. All the synthesized compounds were characterized on the basis of their FT-IR, 1H, 13C NMR, and mass spectral data. Compounds thus obtained were tested in vitro for their antibacterial activity against three Gram-positive bacterial, namely Enterococcus, Bacillus subtilis, and Staphylococcus aureus, and three Gram-negative bacterial strains, namely Psuedomonas aeruginosa, Escherichia coli, and Klebsiella pneumoniae using agar well diffusion method. The percentage similarity of all compounds was also assessed on the basis of physico-chemical and steric parameters as compared to a standard drug, Cefixime using Chem 3D software. Most of the compounds possessed good percentage similarity and exhibited admirable antibacterial activity when compared with the standard drug. Compounds (4a, 4b, 3a, 3c, and 3d) containing pyrazole moiety were found to be most effective against Gram-positive bacteria, S. aureus and B. subtilis.


Pyrazole Triazole Quinoline Hypervalent iodine Antibacterial activity 



Authors thank to Maharishi Markandeshwar University, Mullana-Ambala, India for providing necessary research facilities.

Supplementary material

44_2014_1254_MOESM1_ESM.docx (4 mb)
Supplementary material 1 (DOCX 4055 kb)


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of ChemistryMaharishi Markandeshwar UniversityMullana-AmbalaIndia
  2. 2.Department of Pharmaceutical ChemistryMaharishi Markandeshwar College of Pharmacy, Maharishi Markandeshwar UniversityMullana-AmbalaIndia

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