Synthesis and antitubercular evaluation of novel dibenzo[ b , d ]thiophene tethered imidazo[1,2- a ]pyridine-3-carboxamides
作者:Lokesh Pulipati、Jonnalagadda Padma Sridevi、Perumal Yogeeswari、Dharmarajan Sriram、Srinivas Kantevari
DOI:10.1016/j.bmcl.2016.04.088
日期:2016.7
A series of novel dibenzo[b,d]thiophene tethered imidazo[1,2-a]pyridine carboxamides 7a-s were designed and synthesized. The required building block, 2-dibenzo[b,d]thiophenyl imidazo[1,2-a]pyridine carboxylic acid (5) was synthesized from commercial dibenzo[b,d]thiophene in good yields following five-step reaction sequence. The desired carboxamides 7a-s was prepared through coupling of acid 5 with
设计并合成了一系列新颖的二苯并[b,d]噻吩系链的咪唑并[1,2-a]吡啶羧酰胺7a-s。所需的结构单元2-二苯并[b,d]噻吩并咪唑并[1,2-a]吡啶羧酸(5)是由商业二苯并[b,d]噻吩按照五步反应顺序以高收率合成的。通过酸5与各种苄胺的偶联制备所需的羧酰胺7a-s。所有新的类似物7a-s的特征均在于其NMR和质谱分析。在筛选出的针对结核分枝杆菌H37Rv的体外抗分枝杆菌活性的十九种新化合物7a-s中,三种化合物7k(MIC:0.78μg/ mL);7e和7n(MIC:1.56μg/ mL)被鉴定为具有低细胞毒性的有效类似物。