Chemical Modification of Tazobactam

Synthesis of 2β-[(4-Substituted)-l, 2, 3-triazol-l-yl]methyl Penicillanic Acid Sulfone Derivatives

Abstract

A series of 2β-[(4-substituted)-l, 2, 3-triazol-l-yl]methyl penicillanic acid sulfones was synthesized as β-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-2β-[(4-pyridiniummethyl)-l, 2, 3-triazol-lyl]methyl-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.