A series of novel dimers of 15-membered macrolides was synthesized and evaluated. The dimers exhibited excellent activity against erythromycin-susceptible S. pneumonia, but did not show any improved activity against erythromycin-resistant S. pneumoniae encoded by erm gene. ？2009 Shu Tao Ma. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All fights reserved.
A series of novel 4'-O-carbamoyl analogs of clarithromycin were synthesized and evaluated for their in vitro antibacterial activity. All of the desired compounds showed excellent activity against erythromycin-susceptible S.pneumoniae.Particularly,4-fluorobenzyl carbamate 7a demonstrated potent activity against erythromycin-resistant S.pneumoniae encoded by the mef gene,and remarkably improved activity against erythromycin-resistant S.pneumoniae encoded by the erm gene,and the erm and mef genes.
