against enterotoxin protein of S. aureus which belongs to Staphylococcal enterotoxin type A(SEA). In vitro and in silico studies revealed that compounds 3d, 3g, and 3h have demonstrated significant antibacterial activity in comparison to the standard control drug ampicillin and streptomycin.
A rapid method for the preparation of 2-substituted oxazolo[4,5-b]pyridines using microwave-assisted direct condensation reactions
作者:Mikko J. Myllymäki、Ari M.P. Koskinen
DOI:10.1016/j.tetlet.2007.01.161
日期:2007.3
The condensationreaction of 2-amino-3-hydroxypyridine with different carboxylic acids by microwave-assisted heating is a fast method for producing libraries based on fused 2-substituted oxazolo[4,5-b]pyridines in moderate to good yields.
通过微波辅助加热使2-氨基-3-羟基吡啶与不同的羧酸发生缩合反应是一种以中等到良好的产率制备基于稠合的2-取代的恶唑并[4,5- b ]吡啶的文库的快速方法。
Molecular modeling, density functional theory, ADME prediction and antimicrobial activity studies of 2-(substituted)oxazolo[4,5-<i>b</i>]pyridine derivatives
作者:Ismail Celik、Meryem Erol、Gulcan Kuyucuklu
DOI:10.1039/d1nj00701g
日期:——
activities of previously synthesized 2-(substituted)oxazolo[4,5-b]pyridine derivatives toward six bacteria strains and twelve related drug-resistant isolates, and one fungus strain and two related drug-resistant isolates were investigated via the microdilution method. P6 (2-(4-trifluoromethylphenyl)oxazolo[4,5-b]pyridine) and P7 (2-(4-trifluoromethoxyphenyl)oxazolo[4,5-b]pyridine) showed better activity against
本研究考察了先前合成的2-(取代)恶唑并[4,5- b ]吡啶衍生物对6种细菌菌株和12种相关耐药菌株以及1种真菌菌株和2种相关耐药菌株的抗菌活性。通过微量稀释法。P6(2-(4-三氟甲基苯基)恶唑并[4,5- b ]吡啶)和P7(2-(4-三氟甲氧基苯基)恶唑并[4,5- b ]吡啶)对粪肠球菌分离物和大肠杆菌表现出更好的活性。大肠杆菌分离物比氨苄青霉素具有 16 μg mL -1的 MIC 。此外,P5 (2-(4-甲氧基苯基)恶唑并[4,5-b ]吡啶)和P6对铜绿假单胞菌显示出与庆大霉素相当的活性,MIC为16 μg mL -1,而P7显示出比庆大霉素更好的活性,MIC为8 μg mL -1。这些化合物通常表现出良好至强的抗微生物活性。使用 DNA 促旋酶对化合物进行分子对接和分子动力学模拟,并评估相互作用。这些化合物在 DNA 促旋酶 ATP 结合位点显示重叠,具有相似的蛋白质-配体相互作用。apo
Acid-Catalyzed, Silica-Supported, One-Pot Benzoylation Route to Synthesize 2-(Substituted Phenyl)oxazolo[4,5-b]pyridines Under Ambient Conditions
The present paper describes a silica-supported, perchloric-acid-catalyzed, efficient protocol for the synthesis of 2-(phenyl)oxazolo[4,5-b]pyridine derivatives. This strategy has high conversion, simple workup procedures, ambient conditions, short reaction times, and a reusable catalyst. Structures of the synthesized compounds have been established on the basis of elemental analysis and spectral data (IR, H-1 NMR, C-13 NMR, and mass spectrometry). Moreover, to investigate the mechanistic details of the reaction and to ascertain the regioselective outcome of the product, local nucleophilicity descriptors N-k at B3LYP/6-311G++(d, p) level were determined and analyzed.