作者:Jan Marek、David Malinak、Rafael Dolezal、Ondrej Soukup、Marketa Pasdiorova、Martin Dolezal、Kamil Kuca
DOI:10.3390/molecules20033681
日期:——
A set of new quaternary ammonium compounds based on pyridine-4-aldoxime was synthesized, characterized with analytical data (NMR, EA, HPLC, MS) and tested for in vitro antimicrobial activity (antibacterial, antifungal) and cytotoxicity. Quaternary pyridinium-4-aldoxime salts with length of alkyl side chain from C8 to C20 and belonging to the group of cationic surfactants were investigated in this work. An HPLC experimental protocol for characterization of mixtures of all homologues has been found. Antimicrobial evaluation found that yeast-type fungi were most sensitive towards C14 and C16 analogues, whereas the C16 analogue was completely ineffective against filamentous fungi. Antibacterial assessment showed versatility of C14 and relatively high efficacy of C16 against G+ strains and C14 against G− strains. Notably, none of the studied compounds exceeded the efficacy and versatility of the benzalkonium C12 analogue, and benzalkonium analogues also exhibited lower cytotoxicity in the cell viability assay.
合成了一组基于吡啶-4-醛肟的新型季铵化合物,并通过分析数据(NMR、EA、HPLC、MS)进行表征,测试了其体外抗菌活性(抗细菌、抗真菌)和细胞毒性。本工作中研究了属于阳离子表面活性剂组的具有从C8到C20的烷基侧链长度的季吡啶-4-醛肟盐。找到了一种用于表征所有同系物混合物的HPLC实验方案。抗菌评估发现,酵母型真菌对C14和C16类似物最敏感,而C16类似物对丝状真菌完全无效。抗菌评估显示C14具有多样性,C16对G+菌株具有相对较高的效果,而C14对G−菌株有效。值得注意的是,所研究的所有化合物都没有超过苯扎氯铵C12类似物的效果和多样性,而且在细胞活力测定中,苯扎氯铵类似物的细胞毒性也较低。