Synthesis of Novel Series of Quinolino[3,2-f][1,2,4]triazolo[3,4-b][1,3,4]-thiadiazepines Derivatives Incorporated with 3-[5-(benzofuran-2-yl)-1-phenyl-1H-pyrazol-3-yl] Moiety as Potent Antimicrobial Agent
作者:M. Idrees、S. Kola、N.J. Siddiqui
DOI:10.14233/ajchem.2018.21483
日期:——
A novel series of quinolino[3,2-f][1,2,4]triazolo[3,4-b][1,3,4]thiadiazepine derivatives (7a-i) incorporated with 3-[5-(benzofuran-2-yl)-1-phenyl-1H-pyrazol-3-yl] moiety were synthesized through one-pot cyclo-condensation reaction of 5-[5-(benzofuran-2-yl)-1-phenyl-1H-pyrazol-3-yl]-4-amino-4H-1,2,4-triazole-3-thiol (4) with 2-chloroquinoline-3-carbaldehyde derivatives (6a-i) in presence of potassium carbonate in DMF. The characterization of newly synthesized compounds 3-[5-(benzofuran-2-yl)-1-phenyl-1H-pyrazol-3-yl]-substituted quinolino[3,2-f][1,2,4]triazolo[3,4-b][1,3,4]thiadiazepines (7a-i) was established by elemental analysis and spectral studies such as FT-IR, 1H NMR, 13C NMR and Mass spectra. All the synthesized compounds were screened in vitro for their antimicrobial activity against pathogenic microorganism including Gram-positive bacterial strains, S. aureus and Gram-negative bacteria strains E. coli, P. vulgaris and S. typhi at different concentration. The result of bioassay when compared with chloramphenicol as standard drug indicated good to moderate activity against these microbial strains.
通过 5-[5-(苯并呋喃-2-基)-1-苯基-1H-吡唑-3-基]-4-氨基-4H-1.2,4-三唑-3-硫醇(4)与 2-氯喹啉-3-甲醛衍生物(6a-i)在 DMF 中的碳酸钾存在下发生环缩合反应,合成了一系列新型喹啉并[3,2-f][1,2,4]三唑并[3,4-b][1,3,4]噻二氮杂卓衍生物(7a-i),其中包含 3-[5-(苯并呋喃-2-基)-1-苯基-1H-吡唑-3-基]分子、2,4-三唑-3-硫醇 (4) 与 2-氯喹啉-3-甲醛衍生物 (6a-i) 在 DMF 中的碳酸钾存在下发生的缩合反应。新合成化合物 3-[5-(苯并呋喃-2-基)-1-苯基-1H-吡唑-3-基]-取代喹啉并[3,2-f][1,2,4]三唑并[3,4-b][1,3,4]噻二氮杂卓(7a-i)的表征是通过元素分析和光谱研究(如傅立叶变换红外光谱、1H NMR、13C NMR 和质谱)确定的。体外筛选了所有合成化合物在不同浓度下对病原微生物(包括革兰氏阳性菌株、金黄色葡萄球菌和革兰氏阴性菌株大肠杆菌、寻常痢疾杆菌和伤寒杆菌)的抗菌活性。生物测定结果与标准药物氯霉素相比,显示出对这些微生物菌株具有良好至中等程度的活性。