通过将β-内酰胺抗生素与铁螯合剂(例如儿茶酚和异羟肟酸)结合来利用铁吸收途径是克服革兰氏阴性细菌中与通透性相关的抗性的行之有效的策略。由于先前尚未为此目的检查过天然存在的铁螯合的四酸,因此设计并合成了一系列探索性新结构的氨苄青霉素-四酸杂种,这些杂物在结构上与尿嘧啶青霉素相似。针对具有代表性的临床上重要的细菌病原体,评估了新的类似物的螯合铁的能力及其MIC活性。tetra酸β-内酰胺杂化物表现出对铁的高亲和力,约为10 -30 M 3。杂种对革兰氏阳性细菌的活性较低。然而,针对革兰氏阴性细菌,它们的活性是依赖于物种的,与几种杂种相比,杂种表现出比氨苄西林更高的针对野生型铜绿假单胞菌的活性。在棒酸存在下,杂种的抗-Gram负活性得到了改善,这表明tetra酸部分并未提供针对β-内酰胺酶的额外保护作用。此外,发现杂种是外排泵底物,因为它们的活性明显增强,可抵抗泵灭活的菌株。与邻苯二酚和异羟肟酸
A Traceless Solid-Phase Approach to Functionalized Tetramic Acids and 2-Amino-4-pyrrolinones
作者:Olga Igglessi-Markopoulou、Kyriakos C. Prousis、Anastasia Detsi
DOI:10.1055/s-2005-918941
日期:——
A novel traceless route for the synthesis of optically active functionalized tetramic acids and 2-amino-4-pyrrolinones on solid support is described. p-Nitrophenyl carbonate linker on Wang resin is used to anchor l-α-Amino acids by their N-terminus thus leaving the carboxylic function free for further elaboration. High yields and ee, in combination with the versatility implied by the wide range of commercially available building blocks, are the major advantages of the proposed methodology.
描述了一种在固体载体上合成光学活性功能化特特拉姆酸和 2-氨基-4-吡咯啉酮的新无痕路线。 Wang 树脂上的对硝基苯碳酸酯连接体用于通过其 N 末端锚定 L-α-氨基酸,从而使羧基功能自由以供进一步阐述。高产率和高效率,再加上各种商用构建模块所暗示的多功能性,是所提出方法的主要优点。
INHIBITORS OF UNDECAPRENYL PYROPHOSPHATE SYNTHASE
申请人:Hurley Timothy Brian
公开号:US20090203694A1
公开(公告)日:2009-08-13
The present invention relates to compounds that are selective and/or potent inhibitors of UPPS. In addition to compounds which inhibit UPPS, the invention also provides pharmaceutical compositions comprising these compounds and methods of using these compounds for treating bacterial disease, such as bacterial infection.
Design and structure–activity relationships of potent and selective inhibitors of undecaprenyl pyrophosphate synthase (UPPS): Tetramic, tetronic acids and dihydropyridin-2-ones
Based on a pharmacophore hypothesis substituted tetramic and tetronic acid 3-carboxamides as well as dihydropyridin-2-one- 3-carboxamides were investigated as inhibitors of undecaprenyl pyrophosphate synthase (UPPS) for use as novel antimicrobial agents. Synthesis and structure - activity relationship patterns for this class of compounds are discussed. Selectivity data and antibacterial activities for selected compounds are provided. (C) 2008 Elsevier Ltd. All rights reserved.
Poncet, Joel; Jouin, Patrick; Castro, Bertrand, Journal of the Chemical Society. Perkin transactions I, 1990, p. 611 - 616
Design, synthesis and microbiological evaluation of ampicillin–tetramic acid hybrid antibiotics
作者:Philip T Cherian、Aditi Deshpande、Martin N Cheramie、David F Bruhn、Julian G Hurdle、Richard E Lee
DOI:10.1038/ja.2016.52
日期:2017.1
activities of the hybrids improved in the presence of clavulanic acid revealing that the tetramic acid moiety did not provide added protection against β-lactamases. In addition, the hybrids were found to be efflux pump substrates as their activities markedly improved against pump-inactivated strains. Unlike the catechol and hydroxamicacidsiderophore β-lactam conjugates, the activities of the hybrids did not
通过将β-内酰胺抗生素与铁螯合剂(例如儿茶酚和异羟肟酸)结合来利用铁吸收途径是克服革兰氏阴性细菌中与通透性相关的抗性的行之有效的策略。由于先前尚未为此目的检查过天然存在的铁螯合的四酸,因此设计并合成了一系列探索性新结构的氨苄青霉素-四酸杂种,这些杂物在结构上与尿嘧啶青霉素相似。针对具有代表性的临床上重要的细菌病原体,评估了新的类似物的螯合铁的能力及其MIC活性。tetra酸β-内酰胺杂化物表现出对铁的高亲和力,约为10 -30 M 3。杂种对革兰氏阳性细菌的活性较低。然而,针对革兰氏阴性细菌,它们的活性是依赖于物种的,与几种杂种相比,杂种表现出比氨苄西林更高的针对野生型铜绿假单胞菌的活性。在棒酸存在下,杂种的抗-Gram负活性得到了改善,这表明tetra酸部分并未提供针对β-内酰胺酶的额外保护作用。此外,发现杂种是外排泵底物,因为它们的活性明显增强,可抵抗泵灭活的菌株。与邻苯二酚和异羟肟酸