Rifamycin C-11 oxime derivatives effective against drug-resistant microbes
申请人:Li Jing
公开号:US20050203076A1
公开(公告)日:2005-09-15
The invention relates to rifamycin derivatives having antimicrobial activities, including activities against drug-resistant microorganisms, specifically, the rifamycin derivatives having an oxime group at the C-11 position.
Preparation and in vitro anti-staphylococcal activity of novel 11-deoxy-11-hydroxyiminorifamycins
作者:Jing Li、Zhenkun Ma、Katrina Chapo、Dalai Yan、A. Simon Lynch、Charles Z. Ding
DOI:10.1016/j.bmcl.2007.08.048
日期:2007.10
We report herein the preparation and anti-staphylococcal activity of a series of novel 11-deoxy-11-hydroxyiminorifamycins. Many of the compounds synthesized exhibit potent activity against wild-type Staphylococcus aureus with MICs equivalent to, or better than, rifamycin reference agents. In addition, some of the compounds retain potent activity against an intermediate rifamycin-resistant strain of Staphylococcus aureus. For instance, compound 5k exhibits an MIC of 0.12 mu g/mL against an intermediate rifamycin-resistant strain, while the rifamycin reference agents, rifampin and rifalazil, exhibit MICs of 16 mu g/mL and 2 mu g/mL, respectively, against the same strain. (c) 2007 Elsevier Ltd. All rights reserved.