Objective: In this study, a simple triethylammonium salt of phosphoric acid (tri-ethylammonium dihydrogen phosphate) (4) in the liquid state was utilized as an inexpensive, efficient one-pot three components, solvent-free synthesis of thiazolidine-4-one derivatives, with good to excellent yields. Techniques such as FT-IR, 1H-NMR, 13C-NMR, 13C-NMR-DEPT-135, and MS. were used for the structural elucidation. The high biotic efficiency of the newly obtained compounds was confirmed by in vitro antimicrobial action against Gram-positive (S. Aureus), Gram-negative bacteria (P. Aeruginosa and E. Coli) and antifungal activity (C. Albicans) via microplate titer dilution technique. Finally, a molecular docking study was performed with a re-solved crystal structure of S. Aureus D-alanine alanyl carrier protein ligase (PDB ID: 7VHV). This investigation aimed to synthesize a new series of thiazolidine-4-one derivatives combined with benzoxazole moiety. Material and Method: Ionic liquid assistance one-pot solvent-free synthesis method used to synthesize a new series of thiazolidine-4-one derivative 10(a-e). Results: Structural identification of new synthesis and biological evaluation via techniques of (IR, 1H-NMR, 13C-NMR, 13C-NMR-DEPT-135, and MS). Conclusion: Ionic liquid is utilized as an inexpensive, efficient one-pot three-component solvent-free synthesis of thiazolidine-4-one derivatives with good to excellent yields. Most of the synthesized compounds showed high biological and anti-fungal activity, in line with the docking study against mentioned microorganism and crystal structure of PDB (ID: 7VHV), respectively.

中文翻译：

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2-(对甲苯基)苯并恶唑-5-胺新型1, 3-噻唑烷-4-酮衍生物的一锅法无溶剂合成、生物活性及对接研究

目的：在本研究中，利用一种简单的液态磷酸三乙铵盐（磷酸二氢三乙铵）(4) 作为廉价、高效的一锅三组分、无溶剂合成噻唑烷-4-酮衍生品，具有良好至优异的收益率。FT-IR、1H-NMR、13C-NMR、13C-NMR-DEPT-135 和 MS 等技术。用于结构阐明。新获得的化合物具有高生物效率，通过微孔板滴度对革兰氏阳性菌（金黄色葡萄球菌）、革兰氏阴性菌（铜绿假单胞菌和大肠杆菌）的体外抗菌作用和抗真菌活性（白色念珠菌）得到证实稀释技术。最后，利用金黄色葡萄球菌D-丙氨酸丙氨酰载体蛋白连接酶（PDB ID：7VHV）解析的晶体结构进行了分子对接研究。本研究旨在合成一系列新的与苯并恶唑部分结合的噻唑烷-4-酮衍生物。材料与方法：采用离子液体辅助一锅法无溶剂合成方法合成了一系列新的噻唑烷-4-酮衍生物10(ae)。结果：通过（IR、1H-NMR、13C-NMR、13C-NMR-DEPT-135 和 MS）技术对新合成物进行结构鉴定和生物学评价。结论：离子液体可作为一种廉价、高效的一锅三组分无溶剂合成噻唑烷-4-酮衍生物的方法，具有良好至优异的产率。大多数合成的化合物表现出较高的生物活性和抗真菌活性，分别与针对上述微生物和PDB晶体结构（ID：7VHV）的对接研究一致。