This methodology is successfully applied to synthesize 18 numbers of new 2H‐chromene‐substituted 1,2,4‐oxadiazole derivatives in good to high yields. The structure of the product was ascertained by X‐ray crystallographic analysis. All the synthesized compounds were evaluated for their in vitro antibacterial activity against two different pathogenic bacterial strains, that is, Escherichia coli (MTCC614)
在常规油浴加热和微波辐射下,由多种基于苯并a的a
肟与可轻易获得的
羧酸合成了一系列新的基于苯并chrome的恶二唑衍
生物。在
DMF中结合微波加热使用市售的E
DCI和
HOBt作为
偶联剂,可快速提高产品
1,2,4-恶二唑的收率和纯度。该方法已成功应用于以高到高收率合成18种新的2 H-色烯取代的
1,2,4-恶二唑衍
生物。产品结构通过X射线晶体学分析确定。对所有合成的化合物进行体外评估对两种不同的病原细菌菌株(即大肠杆菌(M
TCC614)和肺炎克雷伯菌)的抗菌活性。体外抗菌试验获得的结果表明,6g和6h表现出接近标准药物
庆大霉素的良好抗菌活性。分子对接研究表明,化合物6g和6h与大肠杆菌的细菌目标DNA促旋酶发生氢键相互作用。