Novel hybrids of 15-membered 8a- and 9a-azahomoerythromycin A ketolides and quinolones as potent antibacterials
作者:Dražen Pavlović、Andrea Fajdetić、Stjepan Mutak
DOI:10.1016/j.bmc.2010.10.024
日期:2010.12
well as fastidious Gram-negative pathogens. The best compounds in this series overcome all types of resistance in relevant clinical Gram-positive pathogens and display hitherto unprecedented in vitro activity against the constitutively MLSB-resistant strain of Staphylococcus aureus. In addition, they also represent an improvement over telithromycin (2) and cethromycin (3) against fastidious Gram-negative
合成了一系列新颖的6-O-取代和6,12-二-O-取代的8a-氮杂-8a-红霉素A和9a-氮杂-9a-红霉素A酮醇化物,并评估了其对一组抗菌肽的体外抗菌活性。代表性的红霉素易感和抗红霉素的测试菌株。还合成了另一系列的基于14元红霉素肟支架的酮缩酮,与15元氮杂红霉素类似物相比,它们具有抗菌活性。一般而言,结构活性研究表明,与9a-azahomoerythromycin系列中相应的15元类似物相比,14元酮化物显示出良好的抗菌活性。但是,在8a-azahomoerythromycin系列中,B)抗性革兰氏阳性病原体以及挑剔的革兰氏阴性病原体。该系列中最好的化合物克服了相关临床革兰氏阳性病原体的所有抗药性,并且对金黄色葡萄球菌的组成型MLS B耐药菌株显示出前所未有的体外活性。此外,它们还代表了针对抗革兰氏阴性病原体流感嗜血杆菌和卡他莫拉菌的泰利霉素(2)和cethromycin(3)的改良。