Synthesis, Characterization, and Biological Evaluation of Novel 7-Oxo-7H-thiazolo[3,2-b]-1,2,4-triazine-2-carboxylic Acid Derivatives
作者:Dong Cai、Tai Li、Qian Xie、Xiaofei Yu、Wei Xu、Yu Chen、Zhe Jin、Chun Hu
DOI:10.3390/molecules25061307
日期:——
X-ray diffraction analysis. The antibacterial and antitubercular activities of the target compounds were evaluated. Compared with Ciprofloxacin and Rifampicin, compounds 5d, 5f and 5g containing the terminal amide fragment exhibited broad spectrum antibacterial activity, and carboxylic acid derivatives or its corresponding ethyl esters had less effect on antibacterial properties. The most potent compound
一系列新型 7-oxo-7H-thiazolo[3,2-b]-1,2,4-triazine-2- 羧酸衍生物通过多步程序以良好的收率合成,包括生成 S 6-取代的芳基甲基-3-巯基-1,2,4-triazin-5-ones与2-氯乙酰乙酸乙酯的-烷基化衍生物,微波辐射的分子内环化,水解和酰胺化。所有目标化合物均通过 1H-NMR、13C-NMR 和 HRMS 谱进行了充分表征。分子内环化在 1,2,4-三嗪环的 N2 位发生区域选择性,化合物 3e 使用单晶 X 射线衍射分析证实了这一点。评价了目标化合物的抗菌和抗结核活性。与环丙沙星和利福平相比,化合物5d、含有末端酰胺片段的5f和5g表现出广谱抗菌活性,羧酸衍生物或其相应的乙酯对抗菌性能的影响较小。最有效的化合物 5f 还表现出对耻垢分枝杆菌的出色体外抗结核活性(最低抑制浓度 (MIC) = 50 μg/mL)和更好的亮氨酰-tRNA 合成酶生长抑制活性(78