Repositioning Antitubercular 6-Nitro-2,3-dihydroimidazo[2,1-<i>b</i>][1,3]oxazoles for Neglected Tropical Diseases: Structure–Activity Studies on a Preclinical Candidate for Visceral Leishmaniasis
作者:Andrew M. Thompson、Patrick D. O’Connor、Adrian Blaser、Vanessa Yardley、Louis Maes、Suman Gupta、Delphine Launay、Denis Martin、Scott G. Franzblau、Baojie Wan、Yuehong Wang、Zhenkun Ma、William A. Denny
DOI:10.1021/acs.jmedchem.5b01699
日期:2016.3.24
linking oxygen for nitrogen (or piperazine), biaryl extension, and replacement of phenyl rings by pyridine. Several less lipophilic analogues displayed improved aqueous solubility, particularly at low pH, although stability toward liver microsomes was highly variable. Upon evaluation in a mouse model of acute Leishmania donovani infection, one phenylpyridine derivative (37) stood out, providing efficacy
6-硝基-2,3-二氢咪唑[2,1- b最初在临床试验用药前驱体前药(PA-824)的备用程序中研究了[] [1,3]恶唑衍生物的结核病。表型筛选针对动素体疾病的代表性实例出乎意料地导致了DNDI-VL-2098的鉴定为潜在的内脏利什曼病(VL)的同类药物候选者。然后进行了其他工作来描述其基本结构特征,目的是在不损害针对VL的活性的情况下提高其溶解度和安全性。尽管4-硝基咪唑部分是特别需要的,但对芳氧基侧链的一些修饰是很好的耐受性,例如,将连接的氧交换成氮(或哌嗪),联芳基延伸以及用吡啶取代苯环。几种较不亲脂的类似物显示出改善的水溶性,尽管对肝微粒体的稳定性变化很大,但特别是在低pH下。在评估小鼠急性模型后利什曼原虫多诺万尼感染中,一种苯基吡啶衍生物(37)脱颖而出,其功效超过了临床前的先导药物。