Objective: A new series 2-phenyl-3-(substituted benzo[d] thiazol-2-ylamino)-quinazoline-4(3H)-one was prepared by the fusion method by reacting 2-phenyl benzoxazine with 2-hydrazino benzothiazole and it was evaluated for their antimicrobial activity against gram positive, gram negative bacteria and fungi.Methods: Titled compounds were synthesized by fusion reactions. These compounds were evaluated by in vitro antibacterial and antifungal activity using the minimum inhibitory concentration and zone of inhibition methods. The synthesized compounds were characterized with the help of infrared, NMR and mass spectral studies. The benzothiazole moiety and the quinazoline ring have previously shown DNA gyrase inhibition and target related antibacterial activity. Thus, molecular docking studies of synthesized compounds were carried out (PDB: 3G75) to study the possible interaction of compounds with the target. The batch grid docking was performed to determine the probable.Results: These compounds showed significant activity against gram positive and gram negative bacteria as well against the fungi. The compound A5 was found to be active against B. subtilis, P aeruginosa and C. albican at 12.5 µg/ml MIC. The compound A3 was found to be active against all microbial strains selected at 25 and 12.5 µg/ml MIC.Conclusion: Though the relationship between the activities shown by these compounds in, the antimicrobial study is still to be established, the docking studies conducted found to be consistent with antimicrobial results. Thus the results indicate that the designed structure can be a potential lead as an antimicrobial agent.
目标:通过融合方法,将2-苯基苯并噁嗪与2-叠氮基苯并噻唑反应制备了一系列新的2-苯基-3-(取代苯并[d]噻唑-2-基氨基)-喹唑啉-4(3H)-酮,并对其针对革兰氏阳性菌、革兰氏阴性菌和真菌的抗菌活性进行了评估。方法:通过融合反应合成了所述化合物。利用最小抑制浓度和抑制区域方法评估了这些化合物的体外抗菌和抗真菌活性。通过红外、核磁共振和质谱研究对合成的化合物进行了表征。苯并噻唑基团和喹唑啉环先前已显示出DNA酶抑制和靶相关抗菌活性。因此,对合成化合物进行了分子对接研究(PDB:3G75),以研究化合物与靶的可能相互作用。进行了批量网格对接以确定可能的结果。结果:这些化合物对革兰氏阳性和革兰氏阴性细菌以及真菌表现出显著活性。化合物A5对枯草杆菌、铜绿假单胞菌和白念珠菌表现出12.5 µg/ml的MIC活性。化合物A3对所有选择的微生物菌株在25和12.5 µg/ml的MIC下表现出活性。结论:尽管这些化合物在抗菌研究中表现出的活性之间的关系尚待建立,但进行的对接研究与抗菌结果一致。因此,结果表明设计的结构可能是一种潜在的抗菌剂。