Synthesis of novel triazolothione, thiadiazole, triazole-functionalized furo/thieno[2,3-<i>b</i>]pyridine derivatives and their antimicrobial activity
作者:G. Santhosh Kumar、Y. Poornachandra、K. Ratnakar Reddy、C. Ganesh Kumar、B. Narsaiah
DOI:10.1080/00397911.2017.1354379
日期:2017.10.18
triazolothione, thiadiazole, triazole-functionalized furo/thieno[2,3-b]pyridine derivatives 9a–l, respectively, were prepared starting from 2 (1H) pyridone 3 through selective O/S-alkylation followed by Thorpe–Ziegler cyclization to form furo/thieno[2,3-b]pyridine derivatives 6. Compounds 6 on reaction with hydrazine hydrate resulted carbohydrazide derivatives 7 and further reacted with diverse substituted phenyl
摘要 以 2 (1H) 吡啶酮 3 为起始原料,通过选择性 O/S-烷基化和 Thorpe,分别制备了一系列新型三唑硫酮、噻二唑、三唑官能化呋喃/噻吩并 [2,3-b] 吡啶衍生物 9a-l –齐格勒环化形成呋喃/噻吩并[2,3-b]吡啶衍生物6。化合物6与水合肼反应产生碳酰肼衍生物7,并进一步与不同的取代苯基异硫氰酸酯反应形成苯基肼碳硫酰胺衍生物8。每个化合物8是在 NaOH、H2SO4 和 N2H4.H2O 存在下独立反应,分别形成三唑硫酮、噻二唑、三唑官能化的呋喃/噻吩并 [2,3-b] 吡啶衍生物 9a-l。所有产品 9a-l 均针对革兰氏 +ve、革兰氏 -ve 细菌和真菌菌株进行了筛选。化合物 9c-h 在 <8.0 微摩尔浓度下对枯草芽孢杆菌微生物型培养物保藏中心 (MTCC) 121 显示出高活性。使用环丙沙星作为标准,针对枯草芽孢杆菌 MTCC 121 的最低杀菌浓度进一