Abstract
A series of 2 beta-[(4-substituted)-1,2,3-triazol-1-yl] methyl penicillanic acid sulfones was synthesized as beta-lactamase inhibitors. Many of these compounds showed good in vitro inhibitory activity against penicillinase, cefotaximase and plasmid-mediated class III TEM enzymes, but exhibited weaker cephalosporinase inhibition. One member in this series--2 beta-[(4-pyridiniummethyl)-1,2,3-triazol- 1-yl]-6,6-dihydropenicillanate 1,1-dioxide (12a), when tested in combination with piperacillin, showed excellent synergistic activity against microorganisms producing plasmid-mediated enzymes, but had insufficient activity against microorganisms producing chromosomally mediated class I enzymes.
MeSH terms
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Ampicillin / pharmacology
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Chemical Phenomena
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Chemistry, Physical
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Drug Synergism
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Electrochemistry
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Enzyme Inhibitors / chemistry*
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Escherichia coli / drug effects
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Gram-Negative Bacteria / drug effects
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Klebsiella pneumoniae / drug effects
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Molecular Structure
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Penicillanic Acid / analogs & derivatives*
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Penicillanic Acid / chemistry
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Penicillanic Acid / pharmacology
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Piperacillin / pharmacology
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Plasmids
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Pseudomonas aeruginosa / drug effects
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Structure-Activity Relationship
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Tazobactam
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Triazoles / chemistry*
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Triazoles / pharmacology
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beta-Lactamase Inhibitors*
Substances
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2-((4-pyridiniummethyl)-1,2,3-triazol-1-yl)methyl-6,6-dihydropenicillanate 1,1-dioxide
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Enzyme Inhibitors
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Triazoles
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beta-Lactamase Inhibitors
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Ampicillin
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Penicillanic Acid
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Tazobactam
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Piperacillin