In Vitro Antibacterial and Antifungal Activity of Salicylanilide Pyrazine-2- carboxylates
作者:Martin Kratky、Jarmila Vinsova、Vladimir Buchta
DOI:10.2174/157340612801216346
日期:2012.6.1
The development of new antimicrobial agents for the treatment of infectious diseases remains challenging due to the increasing impact of antibiotic resistance. Since salicylanilides and esters of pyrazine-2-carboxylic acid have been described as potential antimicrobials, we have designed and synthesized a series of 2-(phenylcarbamoyl)phenyl pyrazine-2-carboxylates. These were evaluated in vitro for the activity against fungi and Gram-positive and Gram-negative bacteria. All derivatives showed significant antibacterial activity against Gram-positive strains (MIC ≥ 0.98 µmol/L) including methicillin-resistant Staphylococcus aureus. The most active molecule was 5-chloro-2-(3-chlorophenylcarbamoyl)phenyl pyrazine-2-carboxylate. With one exception these esters were at least partly active against fungi tested strains, in particular against mould strains (MIC ≥ 1.95 µmol/L). The most active antifungal agent overall proved to be 2-(4-bromophenylcarbamoyl)-4-chlorophenyl pyrazine-2-carboxylate.
由于抗生素耐药性的影响日益严重,开发治疗传染病的新型抗菌剂仍然具有挑战性。由于水杨酰苯胺和吡嗪-2-羧酸酯被描述为潜在的抗菌剂,我们设计并合成了一系列 2-(苯基氨基甲酰基)苯基吡嗪-2-羧酸酯。我们在体外评估了这些衍生物对真菌、革兰氏阳性和阴性细菌的活性。所有衍生物都对革兰氏阳性菌株(MIC ≥ 0.98 µmol/L)(包括耐甲氧西林金黄色葡萄球菌)表现出明显的抗菌活性。活性最强的分子是 5-氯-2-(3-氯苯基氨基甲酰基)苯基吡嗪-2-羧酸酯。除一种情况外,这些酯类至少对真菌测试菌株具有部分活性,尤其是对霉菌菌株(MIC ≥ 1.95 µmol/L)。总的来说,最有效的抗真菌剂是 2-(4-溴苯基氨基甲酰基)-4-氯苯基吡嗪-2-羧酸酯。