Synthesis and antibacterial evaluation of novel clarithromycin derivatives with C-4″ elongated arylalkyl groups against macrolide-resistant strains
摘要:
Novel clarithromycin derivatives with C-4 '' elongated arylalkyl groups were designed, synthesized and evaluated to probe the effect of different lengths of their C-4 '' side chains on the activity against resistant bacterial strains. These derivatives had excellent activity against erythromycin-susceptible Streptococcus pneumoniae, Streptococcus aureus or Streptococcus pyogenes and some of them exhibited greatly improved activity against erythromycin-resistant strains. Compounds 18 and 16, which had the C-4 '' elongated arylalkyl groups with eight atoms from the 4 ''-oxygen atom to the terminal benzene ring, were the most effective against S. pneumoniae expressing the erm gene and the erm and me! genes. In contrast, the most potent compounds 3, 5, 9,17 and 18 against S. pneumoniae expressing the mef gene had C-4 '' elongated arylalkyl groups with three to eight atoms between the 4 ''-oxygen atom and the terminal aromatic ring. (C) 2010 Elsevier Masson SAS. All rights reserved.
Synthesis and antibacterial evaluation of novel clarithromycin derivatives with C-4″ elongated arylalkyl groups against macrolide-resistant strains
摘要:
Novel clarithromycin derivatives with C-4 '' elongated arylalkyl groups were designed, synthesized and evaluated to probe the effect of different lengths of their C-4 '' side chains on the activity against resistant bacterial strains. These derivatives had excellent activity against erythromycin-susceptible Streptococcus pneumoniae, Streptococcus aureus or Streptococcus pyogenes and some of them exhibited greatly improved activity against erythromycin-resistant strains. Compounds 18 and 16, which had the C-4 '' elongated arylalkyl groups with eight atoms from the 4 ''-oxygen atom to the terminal benzene ring, were the most effective against S. pneumoniae expressing the erm gene and the erm and me! genes. In contrast, the most potent compounds 3, 5, 9,17 and 18 against S. pneumoniae expressing the mef gene had C-4 '' elongated arylalkyl groups with three to eight atoms between the 4 ''-oxygen atom and the terminal aromatic ring. (C) 2010 Elsevier Masson SAS. All rights reserved.
Synthesis and antibacterial activity of 4″-O-carbamoyl analogs of clarithromycin
作者:Xue Cui Shen、Bo Jiao、Shu Tao Ma
DOI:10.1016/j.cclet.2009.11.023
日期:2010.3
Abstract A series of novel4″- O -carbamoyl analogs of clarithromycin were synthesized and evaluated for their in vitro antibacterialactivity. 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