Synthesis of novel pyrazole derivatives and their efficacy as antimicrobial agents

Govindaraju, M. and Mylarappa, B. N. and Ajay Kumar, K. (2013) Synthesis of novel pyrazole derivatives and their efficacy as antimicrobial agents. International Journal of Pharmacy and Pharmaceutical Sciences, 5 (4). pp. 734-737. ISSN 0975-1491

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The aim of the present study was to synthesize series of new tetrasubstituted pyrazoles as potential antimicrobial agents. The tetrasubstituted pyrazoles were synthesized by 1,3-dipolar cycloaddition of nitrile imines generated in situ by the oxidative dehydrogenation of aldehyde hydrazones (4) using chloramine-T as mild oxidant with 1, 3-diphenylprop-2-yn-1-one (3) in good yields. The synthesized compounds were tested for their antimicrobial susceptibility activity against different fungi and bacteria species by paper disc diffusion method. The structures of the new pyrazoles were confirmed by spectral studies and elemental analysis. Results of the antimicrobial activity reveal that some of the compounds particularly with chloro substituents act as potential antimicrobial agents against different fungal and bacterial organisms.

Item Type: Article
Uncontrolled Keywords: article, controlled study, drug efficacy, nonhuman, 1, 2, unclassified drug, antifungal activity, Aspergillus flavus, Aspergillus niger, Bacillus subtilis, Candida albicans, disk diffusion, Escherichia coli, Salmonella typhimurium, Staphylococcus aureus, 3, antimicrobial activity, ciprofloxacin, proton nuclear magnetic resonance, 3 (3, Fusarium, nystatin, carbon nuclear magnetic resonance, pyrazole derivative, 4 dimethoxyphenyl) 1, 3 (4 chlorophenyl) 1, 3 (4 fluorophenyl) 1, 3 (4 methoxyphenyl) 1, 3 (4 Methylphenyl) 1, 3 (4 nitrophenyl) 1, 3 aryl 1, 3 dibromo 1, 3 diphenylprop 2 yn 1 one, 3 diphenylpropan 1 one, 4 diphenyl 1H pyrazol 5 yl), 4 diphenyl 1H pyrazol 5 yl) (phenyl) methanone, 4 diphenyl 1H pyrazol 5 yl)( phenyl) methanone, 4 diphenyl 1H pyrazol pyrazol 5 yl (phenyl) methanone, 4 triphenyl 1H pyrazol 5 yl) methanone, phenyl (1
Subjects: C Chemical Science > Chemistry
Divisions: Yuvaraj college > Chemistry
Depositing User: Arshiya Kousar
Date Deposited: 23 Sep 2019 10:26
Last Modified: 23 Sep 2019 10:26

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