- COMPOUNDS HAVING PSEUDOMONAS ANTI-BIOFILM PROPERTIES
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The present invention relates to c-di-GMP lowering chemical compounds having anti- biofilm properties. In particular, the present invention relates to anti-biofilm compounds or salts or tautomers thereof for use in treatment and/or prevention of bacterial biofilm infection in human subjects caused by biofilm-forming bacteria of the genus Pseudomonas, in particular Pseudomonas spp. including P. aeruginosa. Methods of treating such infections in human subjects are contemplated as well. The present inventions further relates to the use of an anti-biofilm compound or a salt or tautomer thereof for dispersing biofilms in industrial water systems.
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Page/Page column 29; 24
(2022/03/09)
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- SAR study of 4-arylazo-3,5-diamino-1: H -pyrazoles: identification of small molecules that induce dispersal of Pseudomonas aeruginosa biofilms
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By screening of a collection of 50 000 small-molecule compounds, we recently identified 4-arylazo-3,5-diamino-1H-pyrazoles as a novel group of anti-biofilm agents. Here, we report a SAR study based on 60 analogues by examining ways in which the pharmacoph
- Andersen, Jens B.,Givskov, Michael,Hultqvist, Louise D.,Jakobsen, Tim H.,Jansen, Charlotte U.,Nielsen, Thomas E.,Nilsson, Martin,Qvortrup, Katrine M.,Tolker-Nielsen, Tim,Uhd, Jesper
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supporting information
p. 1868 - 1878
(2021/12/22)
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- Synthesis of arylhydrazone-based molecular switches using aryldiazonium silica sulfate nanocomposites and analysis of their isomerization
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A fast and efficient method for the synthesis of a series of arylhydrazones by reacting aryldiazonium silica sulfate nanocomposites with malononitrile, ethyl acetoacetate and dimedone is reported. All reactions were carried out in water at room temperature and the corresponding products were obtained in 77–87% yields. The existence of two kinds of intramolecular hydrogen bonds in the arylhydrazones synthesized using ethyl acetoacetate enables these compounds to be switched by rotation about the hydrazone C[dbnd]N bond, which leads to a reversible isomerization between their E and Z configurations. This switching can be controlled by changing the polarity of the solvents. The E/Z ratio of each synthesized compound was studied in CHCl3 and DMSO. The ratios of the E/Z were calculated using 1H NMR data in both CDCl3 and DMSO?d6, and used to calculate ΔG° for the E-Z isomerization of each synthesized compound in these two solvents. By changing the solvent from CHCl3 to DMSO, the E/Z ratios decreased. The results demonstrated that the ΔG° values for the formation of Z isomers were more negative than those of the E isomers in DMSO. This is why Z isomers are more stable than E isomers in DMSO. The results of density functional theory (DFT) calculations at B3LYP/6–311++G (d,p) level of theory, were in agreement with the experiments and confirmed the increased stability of Z isomers in DMSO. In most cases, DFT calculation in CDCl3 and DMSO indicate that the dipole moments of the Z isomers are significantly higher than those of the E isomers. Finally, the effect of temperature on the E-Z isomerization was studied using dynamic 1H NMR. The findings demonstrated that temperature does not have any significant effect on the E-Z isomerization in CDCl3 and DMSO?d6.
- Abbaspourrad, Alireza,Aghaei, Hamidreza,Chermahini, Alireza Najafi,Khazdooz, Leila,Soltani, Solmaz,Zarei, Amin
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- Novel heterocyclic disazo dyes containing pyrazole and phenylpyrazole. part 1: Synthesis, characterization, solvent polarity and acid-base sensitive characteristics
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A series of diazotised aniline and aniline derivative compounds were reacted with solution of malononitrile in pyridine at 0–5 °C were obtained 1a-1m compounds. Then 4-arylazo-3,5-diamino-1H-pyrazole (2a-2m) derivatives were synthesized by coupling arylazo malononitrile compounds with hydrazine. Finally, the synthesized pyrazole derivative 2a-2m compounds were again diazotised. By reacting these diazotised compounds with 3-amino-5?hydroxy-1-phenylpyrazole, the new thirteen heterocyclic disazo dyes (3a-3m) were joined the dye literature and the dye industry. The structures of these newly synthesized compounds were characterized using elemental analysis and spectroscopic methods such as Fourier transform infrared spectroscopy-Attenuated total reflectance (FT-IR-ATR), 1H-Nuclear magnetic resonance (1H NMR) spectroscopy and mass spectroscopy. Then solvatochromic properties and solvent effect in dimethyl sulfoxide, dimethyl formamide, acetonitrile, acetic acid, methanol and chloroform were investigated. In addition, the effects of organic and inorganic acids and bases on the absorption spectra of the compounds and the substituent effect of the phenyl ring-bound groups were investigated.
- Demir?al?, Aykut
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- Discovery, SAR study and ADME properties of methyl 4-amino-3-cyano-1-(2-benzyloxyphenyl)-1H-pyrazole-5-carboxylate as an HIV-1 replication inhibitor
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Inspired by the antiviral activity of known pyrazole-based HIV inhibitors, we screened our in-house library of pyrazole-based compounds to evaluate theirin celluloactivity against HIV-1 replication. Two hits with very similar structures appeared from single and multiple-round infection assays to be non-toxic and active in a dose-dependent manner. Chemical expansion of their series allowed an in-depth and consistent structure-activity-relationship study (SAR) to be built. Further ADME evaluation led to the selection of 4-amino-3-cyano-1-(2-benzyloxyphenyl)-1H-pyrazole-5-carboxylate with an advantageous pharmacokinetic profile. Finally, examination of its mode of action revealed that this compound does not belong to the three main classes of anti-HIV drugs, a feature of prime interest in the context of viral resistance.
- Alvarez, Karine,Busca, Patricia,Calvez, Vincent,Delelis, Olivier,Fichez, Jeanne,Gizzi, Patrick,Gravier-Pelletier, Christine,Le Corre, Laurent,Prestat, Guillaume,Sayon, Sophie,Soulie, Cathia,Marcelin, Anne-Geneviève,Priet, Stéphane
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p. 577 - 582
(2020/06/04)
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- Synthesis and antimicrobial activity studies of some novel substituted phenylhydrazono-1H-tetrazol-5-ylacetonitriles
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In this study, some substituted phenylhydrazono-1H-tetrazol-5-yl- acetonitriles have been synthesized (2a-o, 2a and 2k are known compounds). The synthesized compounds were characterized by spectroscopic methods [Fourier-transform infrared (FTIR), nuclear magnetic resonance (NMR), mass spectroscopy (MS)]. In addition, antimicrobial activities of synthesized compounds were investigated against Bacillus cereus RSKK 863, Escherichia coli ATCC 3521, Pseudomonas aeruginosa ATCC 2921, and Staphylococcus aureus TP32. These compounds had antimicrobial effect against these bacteria (except for 21). Birkhaeuser Boston 2009.
- Yavuz, Serkan,Aydin, Oezlem,Cete, Servet,Disli, Ali,Yildirir, Yilmaz
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scheme or table
p. 120 - 126
(2010/12/20)
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