Synthesis, characterization and antimicrobial studies of some new quinoline incorporated benzimidazole derivatives
作者:B. Garudachari、M.N. Satyanarayana、B. Thippeswamy、C.K. Shivakumar、K.N. Shivananda、Gurumurthy Hegde、Arun M. Isloor
DOI:10.1016/j.ejmech.2012.05.027
日期:2012.8
Two new series of quinoline incorporated benzimidazole derivatives (4a–i and 8a–f) were synthesized from substituted aniline and isatin through multi-step reaction. 6-substituted-4-carboxyquinolines (3a,b and 7) were synthesized by multi component one pot reactions (via Doebner reaction and Pfitzinger reaction respectively) and the targeted benzimidazole derivatives were obtained by the reaction of
通过多步反应,从取代的苯胺和伊斯丁合成了两个新系列的喹啉并入苯并咪唑衍生物(4a - i和8a - f)。通过多组分一锅反应(分别通过Doebner反应和Pfitzinger反应)合成6-取代的4-羧基喹啉(3a,b和7),并通过6-取代的4-羧基喹啉(n)反应得到目标苯并咪唑衍生物。3a,b和7)与取代的芳族二胺在酸性介质中。所有新合成的化合物均通过IR,NMR质谱研究以及C,H,N分析进行了表征。通过孔板法(抑制区)筛选最终化合物的体外抗菌和抗真菌活性。结果表明,化合物4c,4d,8c和8d显示出显着的抗菌活性。发现化合物8b是有效的抗真菌剂。与标准药物相比,图4a,8a和8f显示了对所有测试的微生物菌株的中等至良好的抗微生物活性。