Synthesis and antibiofilm evaluation of 3-hydroxy-2,3-dihydroquinazolin-4(1H)-one derivatives against opportunistic pathogen Acinetobacter baumannii
摘要:
The emergence of multidrug resistant microorganisms has triggered the impending need for new aitimicrobial strategies. The antivirulence strategy with the benefite of alleviating the drug resistance becomes the focus of research. In this study, 22 quorum sensing inhibitors were synthesized by mimicking the structure of autoinducer and acinetobactin and up to 34% biofilm inhibition was observed with 5u. The biofilm inhibition effect was further demonstrated with extracellular polysaccharides inhibition and synergism with Gentamycin sulphate.
The chemistry of 2<i>H</i>-3,1-benzoxazine-2,4(1<i>H</i>)dione (isatoic anhydrides) 1. The synthesis of<i>N</i>-substituted 2<i>H</i>-3,1-benzoxazine-2,4(1<i>H</i>)diones
作者:Goetz E. Hardtmann、Gabor Koletar、Oskar R. Pfister
DOI:10.1002/jhet.5570120325
日期:1975.6
Three methods for the preparation of N-substituted 2H-3,1-benzoxazine-2,4(1H)diones (isatoicanhydrides) (1) utilizing 2-chloro-, 2-nitrobenzoic acids and N-unsubstituted isatoicanhydrides as starting materials, are described.
三种制备N-取代的2 H -3,1-苯并恶嗪-2,4(1 H)二酮(乙酸酐)的方法(1)使用2-氯-,2-硝基苯甲酸和N-未取代的等角酸酐作为制备方法描述了起始材料。
To successively construct two amide bonds between two benzene rings, the reaction of methyl N-alkylanthranilate and N-alkylisatoic anhydride in the presence of a base was studied. When the reaction was carried out with lithium hexamethyldisilazide and N,N,N′,N′-tetramethylethylenediamine in THF at 70 °C under reduced pressure, a cyclic diamide was obtained in high yield.
为了在两个苯环之间连续生成两个酰胺键,我们研究了 N-烷基黄原酸甲酯和 N-烷基异酸酐在碱存在下的反应。在 70 °C 减压条件下,用六甲基二硅氮化锂和 N,N,N′,N′-四甲基乙二胺在 THF 中进行反应,可获得高产率的环状二酰胺。
Synthesis and antibiofilm evaluation of 3-hydroxy-2,3-dihydroquinazolin-4(1H)-one derivatives against opportunistic pathogen Acinetobacter baumannii
作者:Guo Yang、Cheng Cheng、Guo-Bo Xu、Lei Tang、Kim-Lee Chua、Yuan-Yong Yang
DOI:10.1016/j.bmc.2020.115606
日期:2020.8
The emergence of multidrug resistant microorganisms has triggered the impending need for new aitimicrobial strategies. The antivirulence strategy with the benefite of alleviating the drug resistance becomes the focus of research. In this study, 22 quorum sensing inhibitors were synthesized by mimicking the structure of autoinducer and acinetobactin and up to 34% biofilm inhibition was observed with 5u. The biofilm inhibition effect was further demonstrated with extracellular polysaccharides inhibition and synergism with Gentamycin sulphate.