Microwave-assisted synthesis of pyrido[1,2-a]benzimidazole derivatives of β-aryloxyquinoline and their antimicrobial and antituberculosis activities
作者:Chetan B. Sangani、Hardik H. Jardosh、Manish P. Patel、Ranjan G. Patel
DOI:10.1007/s00044-012-0322-5
日期:2013.6
containing pyrido[1,2-a]benzimidazole derivatives of β-aryloxyquinoline has been synthesized via base catalyzed microwave-assisted multi-component cyclocondensation reaction. This methodology allowed us to achieve the desired products in good yields in very short time with the use of 10 mol% NaOH as a non-hazardous organic base. The chemical structures of compounds 6a–x were elucidated by 1H NMR, 13C
通过碱催化微波辅助多组分环缩合反应合成了一系列新的含β-芳氧基喹啉吡啶并[1,2- a ]苯并咪唑衍生物的化合物。使用10 mol%NaOH作为无害有机碱,这种方法使我们能够在很短的时间内以高收率获得所需的产品。通过1 H NMR,13 C NMR,FT-IR,元素分析和质谱数据阐明了化合物6a – x的化学结构。针对一组致病性细菌和真菌菌株测试了标题衍生物的抗菌活性,并针对结核分枝杆菌进行了测试。H37Rv具有抗结核活性。结构活性关系研究表明,标题化合物的抗菌和抗结核功效不仅取决于通过醚连接的芳基环附加的双环杂芳族药效团,还取决于外围取代基的性质,还可能取决于它们的空间关系和位置变化。