Click-based synthesis and antitubercular evaluation of novel dibenzo[ b , d ]thiophene-1,2,3-triazoles with piperidine, piperazine, morpholine and thiomorpholine appendages
作者:Lokesh Pulipati、Perumal Yogeeswari、Dharmarajan Sriram、Srinivas Kantevari
DOI:10.1016/j.bmcl.2016.04.015
日期:2016.6
A series of novel piperidine, piperazine, morpholine and thiomorpholine appended dibenzo[b,d]thiophene-1,2,3-triazoles were designed and synthesized utilizing azide–alkyne click chemistry in the penultimate step. The required azide building block 6a–e was synthesized from commercial dibenzo[b,d]thiophene in good yields following five step reaction sequence. All the new analogues 8a–f, 9a–f, 10a–f,
在倒数第二步中,使用叠氮化物-炔烃点击化学方法设计并合成了一系列新型的哌啶,哌嗪,吗啉和硫代吗啉,并附有二苯并[ b,d ]噻吩-1,2,3-三唑。所需的叠氮化物结构单元6a - e是由商业二苯并[ b,d ]噻吩按照五步反应序列以高收率合成的。所有新的类似物8a – f,9a – f,10a – f,11a – f和12a – f通过NMR和质谱分析对其进行表征。筛选所有三十种新化合物具有针对结核分枝杆菌H37Rv的体外抗分枝杆菌活性,分别得到有效的类似物MIC为0.78μg/ mL,0.78μg/ mL和1.56μg/ mL的8a,8f和11e,并显示出较低的细胞毒性。有趣的是,所有六个哌嗪附加的二苯并[ b,d ]噻吩-1,2,3-三唑11a - f均显示出Mtb抑制活性,MIC为1.56-12.5μg/ mL。在某种程度上,这里观察到的数据表明结核分枝杆菌 附肢之间的抑制顺序是哌嗪>硫吗啉>吗啉。