Synthesis and antitubercular activity of new 1,3,4-oxadiazoles bearing pyridyl and thiazolyl scaffolds
作者:Sambhaji T. Dhumal、Amarsinh R. Deshmukh、Manisha R. Bhosle、Vijay M. Khedkar、Laxman U. Nawale、Dhiman Sarkar、Ramrao A. Mane
DOI:10.1016/j.bmcl.2016.05.093
日期:2016.8
In search of more potent and safe new antitubercular agents, here new 2-pyridinyl substituted thiazolyl-5-aryl-1,3,4-oxadiazoles (6a–o), have been designed and synthesized using thionicotinamide as a starting, following novel multistep synthetic route. An intermediate, pyridinyl substituted thiazolyl acid hydrazide (4) when condensed with benzoic acids/nicotinic acids (5a–o) in the presence of silica
为了寻找更有效和安全的新型抗结核药,此处设计并合成了新的2-吡啶基取代的噻唑基-5-芳基-1,3,4-恶二唑(6a - o),并以亚硫磺酰胺为起始原料,并经过新颖的多步法合成合成路线。当在二氧化硅负载的POCl 3存在下与苯甲酸/烟酸(5a - o)缩合时,中间体吡啶基取代的噻唑基酸酰肼(4)产生更好的标题化合物,收率更高。所有合成的化合物(6a - o)和中间酸酰肼(4)已经筛选了其针对结核分枝杆菌H37Ra(MTB)和牛分枝杆菌BCG的体外抗结核活性。其中,6f,6j,6l和6o在浓度低于3μg/ mL时显示出对牛分枝杆菌BCG的有希望的活性。这些化合物对四种人类癌细胞系显示出低细胞毒性(CC 50:> 100μg/ mL)。还针对分枝杆菌烯酰还原酶(InhA)酶进行了分子对接研究,以深入了解这些分子的结合方式并记录了良好的结合亲和力。还对标题产品的ADME属性进行了分析。