title: Novel 1,3,5-triphenyl-2-pyrazolines as anti-infective agents.
abstract: Sixteen 1,3,5-triphenyl-2-pyrazolines were synthesized and their anti-infective activities (against Mycobacterium tuberculosis H(37)Rv, six bacterial and four fungal strains) were tested. Only compound with SO(2)CH(3) in the para position of the A-ring was active against the tubercular strain at 100 microg/ml concentration. All compounds showed good anti infective activity against Escherichia coli and poor activity against Staphylococcus aureus. Compounds 4, 12, 13 and 14 exhibited reasonable activity against all the organisms tested (<0.309 microM except against S. aureus. The activity of these compounds correlated with their lipophilic/hydrophilic nature. Compounds 4, 10 and 16 showed very good activity (>88% reduction) against four fungi studied at 2mg/ml. All these compounds possess halogen substitutions. Compound 11 showed very high activity (>90%) against three fungi. Majority of the compounds showed more than 90% inhibition against one or two fungi. Since pyrazolines are reported to inhibit the activity of p-glycoprotein, they may prevent drug resistance developed by microorganism.
authors.affiliation: Department of Biotechnology, Indian Institute of Technology Madras, Adyar, Chennai 600 036, India.
authors.forename: P M
authors.initials: PM
authors.lastname: Sivakumar
authors.forename: S
authors.initials: S
authors.lastname: Prabhu Seenivasan
authors.forename: Vanaja
authors.initials: V
authors.lastname: Kumar
authors.forename: Mukesh
authors.initials: M
authors.lastname: Doble
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000890:Anti-Infective Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D009169:Mycobacterium tuberculosis / Q000187:drug effects; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D013211:Staphylococcus aureus / Q000187:drug effects
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000890:Anti-Infective Agents; D011720:Pyrazoles