Novel 5-Acetyl-3-aryl-2-thioxo-dihydropyrimidine-4,6(1H,5H)-diones: One Pot Three-Component Synthesis, Characterization and Antibacterial Activity
作者:Aamer Saeed、Naeem Abbas、Zaman Ashraf、Michael Bolte
DOI:10.1002/jhet.1681
日期:2014.3
5‐acetyl‐3‐aryl‐2‐thioxo‐dihydropyrimidine‐4,6(1H,5H)‐diones (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h) were synthesized by one pot cyclocondensation of 1‐aroyl‐3‐arylthioureas with malonic acid in the presence of acetic anhydride. These compounds exist in equilibrium with their enolic tautomeric forms 5‐(1‐hydroxy ethylidene)‐3‐aryl‐2‐thioxo‐dihydropyrimidine‐4,6‐(1H,5H)‐diones. The structures were confirmed by
一系列新的5-取代的硫代巴比妥酸衍生物5-乙酰基-3-芳基-2-硫代二氢嘧啶-4,6(1H,5H)-二酮(2a,2b,2c,2d,2e,2f,2g,2h)是通过在乙酸酐存在下将1-芳酰基-3-芳基硫脲与丙二酸进行一锅式缩合反应合成的。这些化合物以其烯键式互变异构形式5-(1-羟基亚乙基)-3-芳基-2-硫代-二氢嘧啶-4,6-(1H,5H)-二酮平衡存在。结构已通过光谱数据,元素分析和第二维情况进行了确认由单晶X射线衍射数据得出。还提出了一种合理的产品形成机理。使用左氧氟沙星作为参考药物评估化合物(2a,2b,2c,2d,2e,2f,2g,2h)对革兰氏阳性和革兰氏阴性细菌代表菌群的初步抗菌活性,发现它们具有良好的活性。所测试的化合物对细菌菌株显示出不同水平的抑制作用。化合物2b 显示出最大的抗病原菌功效,并被确定为进一步结构修饰的先导分子。