Mannich base derivatives of 3-hydroxy-6- methyl-4H-pyran-4-one with antimicrobial activity
作者:DEMET US、BARKIN BERK、ENİSE ECE GÜRDAL、NİHAN AYTEKİN、ZÜHTÜ TANIL KOCAGÖZ、BERRAK ÇAĞLAYAN、IŞIL KURNAZ、DİLEK DEMİR EROL
DOI:10.3906/kim-0908-214
日期:——
A series of 3-hydroxy-6-methyl-2-[(substitutedpiperidine-1-yl) methyl]-4H-pyran-4-one structured compounds were synthesized by reacting 5-hydroxy-2-methyl-4H-pyran-4-one with suitable piperidine derivatives using Mannich reaction conditions. Antibacterial activities of the compounds for E. coli ATCC 25922, S. paratyphi ATCC BAA-1250, S. flexneri ATCC 12022, E. gergoviae ATCC 33426, and M. smegmatis ATCC 14468 were assessed in vitro by the broth dilution method for determination of minimum inhibitory concentration (MIC). In addition, their inhibitory effects over DNA gyrase enzyme were evaluated using a DNA gyrase supercoiling assay. All the synthesized compounds showed a MIC value of either 8 or 16 \mu g/mL for M. smegmatis, whereas minimum to moderate activity was achieved for the others. Those tested in the supercoiling assay had at best a very mild inhibition of the enzyme. This series deserves further attention for testing over Mycobacterium species and topoisomerase II inhibition to develop new lead drugs to treat non-tuberculous mycobacterial infections.
通过在曼尼希反应条件下将5-羟基-2-甲基-4H-吡喃-4-酮与适宜的哌啶衍生物反应,合成了一系列具有3-羟基-6-甲基-2-[(取代哌啶-1-基)甲基]-4H-吡喃-4-酮结构的化合物。通过肉汤稀释法在体外评估了这些化合物对大肠杆菌ATCC 25922、沙门氏菌副伤寒亚种ATCC BAA-1250、福氏志贺菌ATCC 12022、杰戈维亚埃希氏菌ATCC 33426和耻垢分枝杆菌ATCC 14468的抗菌活性,以确定最小抑制浓度(MIC)。此外,还使用DNA促旋酶超螺旋测定法评估了它们对DNA促旋酶的抑制效果。所有合成的化合物对耻垢分枝杆菌的MIC值均为8或16 μg/mL,而对其他菌种则表现出最低至中等的活性。在超螺旋测定中测试的这些化合物对酶的最大抑制作用也是极其轻微的。这一系列化合物值得进一步关注,用于测试对分枝杆菌属物种和拓扑异构酶II的抑制作用,以开发治疗非结核性分枝杆菌感染的新型先导药物。