The issue of antibiotic resistance is becoming progressively serious these days, and the feasible solution to address it is to develop and discover novel antibiotics. The diterpene natural pleuromutilin is a prominent candidate for its special mode of action by inhibiting protein synthesis. In this study, a series of novel pleuromutilin derivatives with chalcone moiety was designed and synthesized, and their antibacterial activities were assessed in vitro. As suggested from the results, most of compounds exhibited potent activities against two methicillin‐resistant Staphylococcus aureus (MRSA) ATCC 33591 and 43300. The further modification of the chalcone structure, aza‐cyclic derivatives were afforded and then assessed, and potent activities against the tested strains were reported. The preliminary docking studies were conducted to explore the interactions between target molecules and binding site.

中文翻译：

---

新型查尔酮-胸膜泌尿素衍生物的合成，生物活性和对接研究。

这些天，抗生素抗性问题变得越来越严重，解决该问题的可行解决方案是开发和发现新型抗生素。二萜天然截短侧耳素因其通过抑制蛋白质合成的特殊作用方式而成为重要候选者。在这项研究中，设计和合成了一系列具有查耳酮部分的截短侧耳素新衍生物，并在体外评估了它们的抗菌活性。结果表明，大多数化合物对两种耐甲氧西林的金黄色葡萄球菌均具有有效的活性。（MRSA）ATCC 33591和43300。随后对查尔酮结构，氮杂环衍生物进行了进一步修饰，然后进行了评估，并报道了其对测试菌株的有效活性。进行了初步的对接研究，以探索目标分子与结合位点之间的相互作用。