Structure−Activity Relationships of Antitubercular Nitroimidazoles. 1. Structural Features Associated with Aerobic and Anaerobic Activities of 4- and 5-Nitroimidazoles
作者:Pilho Kim、Liang Zhang、Ujjini H. Manjunatha、Ramandeep Singh、Sejal Patel、Jan Jiricek、Thomas H. Keller、Helena I. Boshoff、Clifton E. Barry、Cynthia S. Dowd
DOI:10.1021/jm801246z
日期:2009.3.12
lipophilic tail conveyed aerobic activity. Incorporation of a 2-position oxygen atom into a rigid 5-nitroimidazooxazine provided the first 5-nitroimidazole with aerobic activity. Across both series, anaerobic and aerobic activities were not correlated and Mtb mutants lacking the deazaflavin-dependent nitroreductase (Ddn) retained anaerobic sensitivity to some compounds. Aerobic activity appears to be correlated
4-硝基咪唑 PA-824 对需氧和厌氧结核分枝杆菌有活性(Mtb) 而像甲硝唑这样的 5-硝基咪唑仅对厌氧 Mtb 有活性。我们已经合成了 4-和 5-硝基咪唑的类似物并探索了它们的抗结核活性。所有化合物的两种活性都需要硝基。4-硝基咪唑类有氧活性的关键决定因素包括双环恶嗪、亲脂尾部和 2 位氧。对于 5-硝基咪唑,相应的双环类似物和亲脂性尾部的添加都没有表现出有氧活性。将 2 位氧原子并入刚性 5-硝基咪唑并恶嗪提供了第一个具有有氧活性的 5-硝基咪唑。在这两个系列中,厌氧和有氧活性没有相关性,缺乏去氮黄素依赖性硝基还原酶 (Ddn) 的 Mtb 突变体保留了对某些化合物的厌氧敏感性。有氧活动似乎与作为 Ddn 底物的效率相关,这表明改进的硝基咪唑是一种基于结构的优化方法。