A series of novel aminopyrimidinyl benzimidazoles as potentially antimicrobial agents were designed, synthesized and characterized by IR, NMR and HRMS spectra. The biological evaluation in vitro revealed that some of the target compounds exerted good antibacterial and antifungal activity in comparison with the reference drugs. Noticeably, compound 7d could effectively inhibit the growth of A. flavus, E. coli DH52 and MRSA with MIC values of 1, 1 and 8 μg/mL, respectively. Further studies revealed that pyrimidine derivative 7d could exhibit bactericidal mode of action against both Gram positive (S. aureus and MRSA) and Gram negative (P. aeruginosa) bacteria. The active molecule 7d showed low cell toxicity and did not obviously trigger the development of resistance in bacteria even after 16 passages. Furthermore, compound 7d was able to beneficially regulate reactive oxygen species (ROS) generation for an excellent safety profile. Molecular docking study revealed that compound 7d could bind with DNA gyrase by the formation of hydrogen bonds. The preliminary exploration for antimicrobial mechanism disclosed that compound 7d could effectively intercalate into calf thymus DNA to form a steady supramolecular complex, which might further block DNA replication to exert the powerful bioactivities. The binding investigation of compound 7d with human serum albumins (HSA) revealed that this molecule could be effectively transported by HSA.

设计，合成和表征了一系列新型的潜在潜在的抗菌剂氨基嘧啶基苯并咪唑，并通过IR，NMR和HRMS光谱进行了表征。体外生物学评估表明，与参考药物相比，某些目标化合物具有良好的抗菌和抗真菌活性。值得注意的是，化合物7d可以有效抑制MIC，1、1和8μg/ mL的黄曲霉，大肠杆菌DH52和MRSA的生长。进一步的研究表明，嘧啶衍生物7d可能对革兰氏阳性（金黄色葡萄球菌和MRSA）和革兰氏阴性（铜绿假单胞菌）均具有杀菌作用。） 细菌。活性分子7d表现出低细胞毒性，即使经过16次传代，也没有明显触发细菌产生抗药性。此外，化合物7d能够有益地调节活性氧（ROS）的生成，从而具有出色的安全性。分子对接研究表明，化合物7d可通过形成氢键与DNA促旋酶结合。对抗菌机制的初步探索表明，化合物7d可以有效地插入小牛胸腺DNA中，形成稳定的超分子复合物，这可能进一步阻止DNA复制以发挥强大的生物活性。化合物7d的结合研究 人血清白蛋白（HSA）的检测表明该分子可以被HSA有效转运。