Benzimidazolium salts prevent and disrupt methicillin-resistant <i>Staphylococcus aureus</i> biofilms
作者:Jérémie Tessier、Andreea R. Schmitzer
DOI:10.1039/d0ra00738b
日期:——
resistance they acquire. One of the defense mechanisms of resistant bacteria is the formation of biofilms. Herein we show that benzimidazoliumsalts with various flexible or rigid side chains act as strong antibiotic and antibiofilm agents. We show that their antibiofilmactivity is due to their capacity to destroy the biofilm matrix and the bacterial cellular membranes. These compounds are able to avoid
A Metal-Free Tandem Demethylenation/C(sp<sup>2</sup>)–H Cycloamination Process of <i>N</i>-Benzyl-2-aminopyridines via C–C and C–N Bond Cleavage
作者:Dongdong Liang、Yimiao He、Lanying Liu、Qiang Zhu
DOI:10.1021/ol4015656
日期:2013.7.5
A mild, metal-free synthesis of pyrido[1,2-a]benzimidazoles starting with N-benzyl-2-aminopyridines, which employs PhI(OPiv)2 as a stoichiometric oxidant, has been developed. The process is initiated by an unusual PhI(OPiv)2-mediated ipso SEAr reaction, followed by solvent-assisted C–C and C–N bond cleavage.
已经开发了一种轻度,无金属的合成方法,该方法以N-苄基-2-氨基吡啶为原料,以PhI(OPiv)2为化学计量氧化剂,合成了吡啶并[1,2- a ]苯并咪唑类化合物。该过程由一个不寻常的岛(OPiv)发起2介导的本位小号ë的Ar反应,接着进行溶剂辅助C-C和C-N键断裂。
Palladium-catalyzed silylation reaction between benzylic halides and silylboronate
An efficient Pd-catalyzed silylation reaction of benzylic halides with silyboranate is reported. In this reaction, primary and secondary benzylic halides could react well with silylboronates to afford benzylic silanes. This...
Unexpected Tandem Sonogashira-Carbopalladation-Sonogashira Coupling Reaction of Benzyl Halides with Terminal Alkynes: A Novel Four-Component Domino Sequence to Highly Substituted Enynes
benzyl halides with 1-alkynes in Sonogashira reaction promotes in a single-step process the construction of three carbon-carbon bonds regio- and stereoselectively and afforded highly substituted enynes in fair to good yields. The formation of the coupling adduct in this palladium-mediated four-component domino procedure is rationalized by an unprecedented tandem Sonogashira benzylpalladation Sonogashira
Strong Antibacterial Properties of Anion Transporters: A Result of Depolarization and Weakening of the Bacterial Membrane
作者:Claude R. Elie、Guillaume David、Andreea R. Schmitzer
DOI:10.1021/jm501979f
日期:2015.3.12
three series of compounds including N,N′-diphenylethynylbenzyl benzimidazoliumsalts (1 and 2), 1,1′-(pyridine-2,6-diyl)bis(3-(4-(phenylethynyl)benzyl)-1H-benzo[d]imidazol-3-ium) salts (3–5), and 1,1′-(pyridine-2,6-diylbis(methylene))bis(3-(4-(phenyl ethynyl)benzyl)-1H-benzo[d]imidazol-3-ium) salts (6–8) displaying high antimicrobialactivity and low toxicity against human cells were designed, synthesized
低分子量阴离子载体的发展是化学领域的一个新兴话题,因为随着对阴离子转运过程中异常现象的不断发现,对这些化合物的需求不断增加。开发新概念以引发活细胞中的阴离子失衡,同时与耐多药细菌抗争是最重要的主题。在这项研究中,包括N,N'-二苯基乙炔基苄基苯并咪唑鎓盐(1和2),1,1'-(吡啶-2,6-二基)双(3-(4-(苯基乙炔基)苄基)- 1 ħ -苯并[ d ]咪唑-3-鎓)盐(3 - 5)和1,1'-(吡啶-2,6-二苯基双(亚甲基))双(3-(4-(苯基乙炔基)苄基)-1 H-苯并[ d ]咪唑-3-鎓)盐(6 – 8)设计,合成和研究了对人类细胞具有高抗菌活性和低毒性的产品。最有效的化合物在不同的革兰氏阴性和革兰氏阳性细菌中显示出微摩尔的最小抑制浓度,即使长时间暴露后,其溶血活性仍保持在10%左右或更低。这些苯并咪唑盐在细菌膜上的作用机理已通过生物分析技术进行了评估,包括在模型膜脂质体中