作者:Muayed Ahmed Redayan、Maha Salih Hussein、Ashraf Tark Lafta
DOI:10.14233/ajchem.2018.21008
日期:——
A new series of benzimidazole containing Schiff base moiety has been synthesized. The reaction was achieved through cyclocondensation reaction of the substituted 1,2-phenylenediamines and amino acids (glycine, alanine and tyrosine) to gave substituted benzimidazole derivatives 1(a-f). Condensation of these compounds with a variety of aromatic aldehyde yielded the new benzimidazole substituted Schiff base. The chemical structures of the synthesized compounds were confirmed by FT-IR, 1H NMR and 13C NMR. Selected compounds were tested in vitro for their antibacterial activity by disc diffusion method against two types of Gram-positive bacteria namely (Staphylococcous aureus, Bacillus subtilis) and Gram-negative bacteria namely (Pseudomonas aeruginosa, Escherichia coli). The results displayed that most of the prepared compounds have a good antibacterial activity in compared with the standard antibiotic ampicillin and ciprofloxacin.
我们合成了一系列新的含有希夫碱分子的苯并咪唑。该反应是通过取代的 1,2-苯二胺与氨基酸(甘氨酸、丙氨酸和酪氨酸)发生环缩合反应而得到取代的苯并咪唑衍生物 1(a-f)。这些化合物与多种芳香醛缩合后,得到了新的苯并咪唑取代席夫碱。合成化合物的化学结构已通过傅立叶变换红外光谱、1H NMR 和 13C NMR 得到证实。采用盘扩散法对所选化合物进行了体外抗菌活性测试,测试对象包括两种革兰氏阳性菌(金黄色葡萄球菌、枯草杆菌)和革兰氏阴性菌(绿脓杆菌、大肠杆菌)。结果表明,与标准抗生素氨苄西林和环丙沙星相比,大多数制备的化合物具有良好的抗菌活性。