The aim of the present work was to afford benzimidazole-based coumarins as antimicrobial and antioxidant agents. The compounds 3a-3j were prepared by reaction the compounds 1a-1b with the compounds 2a-2e in acetone. Chemical structures of 3a-3j were proven by their spectral analysis. Minimum inhibitory concentrations of 3a-3j were recorded by serial dilution procedure. Antioxidant potential was assessed by the 1,1-diphenyl-2-picrylhydrazyl method. Compounds 1a and 3g were identified as promising antimicrobial agents. Most of the compounds displayed moderate antioxidant activity. It has been concluded that the replacement of the 2-butylthio group with 2-pentylthio or 2-hexylthio substituents and the coumarin structure with another close flavonoid structure may provide better dual antimicrobial/antioxidant compounds.
本研究旨在提供苯并咪唑基香豆素作为抗微生物和抗氧化剂。化合物3a-3j通过将化合物1a-1b与化合物2a-2e在丙酮中反应而制备。通过光谱分析证明了3a-3j的化学结构。通过连续稀释程序记录了3a-3j的最小抑制浓度。抗氧化潜力通过1,1-二苯基-2-苯硝基肼法进行评估。化合物1a和3g被确定为有前途的抗微生物剂。大多数化合物显示出中等抗氧化活性。结论是,用2-戊硫基或2-己硫基取代2-丁硫基基团,以及用另一种接近的类黄酮结构替换香豆素结构可能会提供更好的双重抗微生物/抗氧化剂化合物。