Synthesis and antibacterial activity of novel 4-aryl-[1,2,3]-triazole containing macrolides.

Two series of novel triazole containing 14-member macrolides having either a cladinose or a 3-pyridyl acetate group at the 3-position of the macrolide ring were synthesized. The in vitro antibacterial activities against S. aureus, S. pneumoniae, S. pyogenes and E. faecalis were determined. Macrolide 7a and the fluoroketolide 1 (CEM-101) were evaluated in vivo in murine systemic infection models. All of the macrolide analogs were less active in vitro and in vivo than the fluoroketolide 1 (CEM-101).