scholarly journals Pyridonecarboxylic Acids as Antibacterial Agents. Part 19. Synthesis and Structure-Antibacterial Activity Relationships of 7-(3-Amino-1-propynyl and 3-Amino-1-propenyl)quinolones.

1998 ◽  
Vol 46 (4) ◽  
pp. 631-638 ◽  
Author(s):  
Masahiro FUJITA ◽  
Katsumi CHIBA ◽  
Junji NAKANO ◽  
Yukio TOMINAGA ◽  
Jun-ichi MATSUMOTO
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Agents

Large-scale High-throughput Screening Revealed 5'-(carbonylamino)-2,3'- bithiophene-4'-carboxylate as Novel Template for Antibacterial Agents

2020 ◽  
Vol 17 (5) ◽  
pp. 716-724
Author(s):  
Yan A. Ivanenkov ◽  
Renat S. Yamidanov ◽  
Ilya A. Osterman ◽  
Petr V. Sergiev ◽  
Vladimir A. Aladinskiy ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
High Throughput ◽  
High Throughput Screening ◽  
Large Scale ◽  
Antibacterial Agents ◽  
Sos Response ◽  
Luciferase Assay ◽  
Translational Machinery ◽  
E Coli ◽  
New Class

Background: The key issue in the development of novel antimicrobials is a rapid expansion of new bacterial strains resistant to current antibiotics. Indeed, World Health Organization has reported that bacteria commonly causing infections in hospitals and in the community, e.g. E. Coli, K. pneumoniae and S. aureus, have high resistance vs the last generations of cephalosporins, carbapenems and fluoroquinolones. During the past decades, only few successful efforts to develop and launch new antibacterial medications have been performed. This study aims to identify new class of antibacterial agents using novel high-throughput screening technique. Methods: We have designed library containing 125K compounds not similar in structure (Tanimoto coeff.< 0.7) to that published previously as antibiotics. The HTS platform based on double reporter system pDualrep2 was used to distinguish between molecules able to block translational machinery or induce SOS-response in a model E. coli system. MICs for most active chemicals in LB and M9 medium were determined using broth microdilution assay. Results: In an attempt to discover novel classes of antibacterials, we performed HTS of a large-scale small molecule library using our unique screening platform. This approach permitted us to quickly and robustly evaluate a lot of compounds as well as to determine the mechanism of action in the case of compounds being either translational machinery inhibitors or DNA-damaging agents/replication blockers. HTS has resulted in several new structural classes of molecules exhibiting an attractive antibacterial activity. Herein, we report as promising antibacterials. Two most active compounds from this series showed MIC value of 1.2 (5) and 1.8 μg/mL (6) and good selectivity index. Compound 6 caused RFP induction and low SOS response. In vitro luciferase assay has revealed that it is able to slightly inhibit protein biosynthesis. Compound 5 was tested on several archival strains and exhibited slight activity against gram-negative bacteria and outstanding activity against S. aureus. The key structural requirements for antibacterial potency were also explored. We found, that the unsubstituted carboxylic group is crucial for antibacterial activity as well as the presence of bulky hydrophobic substituents at phenyl fragment. Conclusion: The obtained results provide a solid background for further characterization of the 5'- (carbonylamino)-2,3'-bithiophene-4'-carboxylate derivatives discussed herein as new class of antibacterials and their optimization campaign.

Recent Advances in 1,3,5-Triazine Derivatives as Antibacterial Agents

2020 ◽  
Vol 17 (8) ◽  
pp. 991-1041
Author(s):  
Divya Utreja ◽  
Jagdish Kaur ◽  
Komalpreet Kaur ◽  
Palak Jain
Keyword(s):  
Antibacterial Activity ◽  
Heterocyclic Compounds ◽  
Antibacterial Agents ◽  
Rapid Development ◽  
Pharmacological Action ◽  
Biological Properties ◽  
Vast Array ◽  
Bacterial Diseases ◽  
New Class ◽  
Triazine Derivatives

Triazine, one of the nitrogen containing heterocyclic compounds has attracted the considerable interest of researchers due to the vast array of biological properties such as anti-viral, antitumor, anti-convulsant, analgesic, antioxidant, anti-depressant, herbicidal, insecticidal, fungicidal, antibacterial and anti-inflammatory activities offered by it. Various antibacterial agents have been synthesized by researchers to curb bacterial diseases but due to rapid development in drug resistance, tolerance and side effects, there had always been a need for the synthesis of a new class of antibacterial agents that would exhibit improved pharmacological action. Therefore, this review mainly focuses on the various methods for the synthesis of triazine derivatives and their antibacterial activity.

Fluoroquinolone-3-carboxamide Amino Acid Conjugates: Synthesis, Antibacterial Properties And Molecular Modeling Studies

2020 ◽  
Vol 17 (1) ◽  
pp. 71-84
Author(s):  
Riham M. Bokhtia ◽  
Siva S. Panda ◽  
Adel S. Girgis ◽  
Hitesh H. Honkanadavar ◽  
Tarek S. Ibrahim ◽  
...  
Keyword(s):  
Experimental Data ◽  
Antibacterial Activity ◽  
Amino Acid ◽  
Bacterial Infections ◽  
Antibacterial Agents ◽  
Antibacterial Properties ◽  
Computational Studies ◽  
Protecting Group ◽  
Amino Acid Conjugates ◽  
Molecular Modeling Studies

Background: Bacterial infections are considered as one of the major global health threats, so it is very essential to design and develop new antibacterial agents to overcome the drawbacks of existing antibacterial agents. Method: The aim of this work is to synthesize a series of new fluoroquinolone-3-carboxamide amino acid conjugates by molecular hybridization. We utilized benzotriazole chemistry to synthesize the desired hybrid conjugates. Result: All the conjugates were synthesized in good yields, characterized, evaluated for their antibacterial activity. The compounds were screened for their antibacterial activity using methods adapted from the Clinical and Laboratory Standards Institute. Synthesized conjugates were tested for activity against medically relevant pathogens; Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27856) Staphylococcus aureus (ATCC 25923) and Enterococcus faecalis (ATCC 19433). Conclusion: The observed antibacterial experimental data indicates the selectivity of our synthesized conjugates against E.Coli. The protecting group on amino acids decreases the antibacterial activity. The synthesized conjugates are non-toxic to the normal cell lines. The experimental data were supported by computational studies.

scholarly journals Beehive Products as Antibacterial Agents: A Review

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 717
Author(s):  
Rita Abou Nader ◽  
Rawan Mackieh ◽  
Rim Wehbe ◽  
Dany El El Obeid ◽  
Jean Marc Sabatier ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Honey Bee ◽  
Antibacterial Agents ◽  
Royal Jelly ◽  
Biological Activities ◽  
Vital Role ◽  
Bee Venom ◽  
Bacterial Strains ◽  
Wide Range ◽  
Life Threatening

Honeybees are one of the most marvelous and economically beneficial insects. As pollinators, they play a vital role in every aspect of the ecosystem. Beehive products have been used for thousands of years in many cultures for the treatment of various diseases. Their healing properties have been documented in many religious texts like the Noble Quran and the Holy Bible. Honey, bee venom, propolis, pollen and royal jelly all demonstrated a richness in their bioactive compounds which make them effective against a variety of bacterial strains. Furthermore, many studies showed that honey and bee venom work as powerful antibacterial agents against a wide range of bacteria including life-threatening bacteria. Several reports documented the biological activities of honeybee products but none of them emphasized on the antibacterial activity of all beehive products. Therefore, this review aims to highlight the antibacterial activity of honey, bee venom, propolis, pollen and royal jelly, that are produced by honeybees.

scholarly journals Novel Seleno- and Thio-Urea Containing Dihydropyrrol-2-One Analogues as Antibacterial Agents

Antibiotics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 321
Author(s):  
Shekh Sabir ◽  
Tsz Tin Yu ◽  
Rajesh Kuppusamy ◽  
Basmah Almohaywi ◽  
George Iskander ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antibiotic Resistance ◽  
Quorum Sensing ◽  
Antibacterial Agents ◽  
Inhibitory Concentration ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Positive Bacterium ◽  
Quorum Sensing Inhibition ◽  
Drug Resistant Bacteria

The quorum sensing (QS) system in multi-drug-resistant bacteria such as P. aeruginosa is primarily responsible for the development of antibiotic resistance and is considered an attractive target for antimicrobial drug discovery. In this study, we synthesised a series of novel selenourea and thiourea-containing dihydropyrrol-2-one (DHP) analogues as LasR antagonists. The selenium DHP derivatives displayed significantly better quorum-sensing inhibition (QSI) activities than the corresponding sulphur analogues. The most potent analogue 3e efficiently inhibited the las QS system by 81% at 125 µM and 53% at 31 µM. Additionally, all the compounds were screened for their minimum inhibitory concentration (MIC) against the Gram-positive bacterium S. aureus, and interestingly, only the selenium analogues showed antibacterial activity, with 3c and 3e being the most potent with a MIC of 15.6 µM.

scholarly journals New Insights Into the Promising Antibacterial Activity of Thiophene or Chromene Moiety Containing Aryl Sulfonamide

2021 ◽  
Author(s):  
Sanjeev Rathore ◽  
Ajay Kumar ◽  
Om Prakash ◽  
Vivekanand ◽  
M.K. Saxena ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Agents ◽  
Review Article ◽  
Structural Relationship ◽  
Synthetic Methods ◽  
Pharmacological Activities ◽  
Literature Research ◽  
Heterocyclic Moiety

Abstract Background: Aryl sulfonamides bearing thiophene and chromene moieties have been reviewed for their antibacterial activity and their synthetic methods. Heterocyclic moiety containing aryl sulfonamide compounds are dispersed in nature and are crucial for life. Diverse investigational strategies towards a structural relationship that cognizance upon the exploration of optimized candidates have grown to be extremely crucial.Method: Literature research tells that for a series of thiophene or chromene moiety containing aryl sulfonamide compoundsare vital in medicinal and industrial chemistry.Aryl sulfonamidescontainingheterocyclic moieties display pharmacological activities against pathogenic microbes.Result:Recent various disciplinary reported articles had been cited in this review article to define the potentialantibacterial properties of thiophene-arylsulfonamide and chromene-arylsulfonamide. Conclusion: The finding of this review confirms the importance of aryl sulfonamidescontaining thiophene or chromene moiety as potential antibacterial agents. These final resultswill give ideasto the synthesis and developmentof reactions leading to the potential derivativesfor betterpharmacological applications.

scholarly journals Synthesis, Biological Evaluation and Docking Studies of 1,2,4,5-Tetrasubstituted Imidazoles as Antibacterial Agents: Use of Niobia Supported Heteropoly Tungstate as an Efficient Reusable Catalyst

2021 ◽  
Vol 33 (10) ◽  
pp. 2423-2429
Author(s):  
Aravind Kurnool ◽  
Karunasree Merugu ◽  
Pachipulusu Shravya ◽  
P. Malleswarareddy
Keyword(s):  
Antibacterial Activity ◽  
Catalytic Activity ◽  
Antibacterial Agents ◽  
Ammonium Acetate ◽  
Reaction Times ◽  
Binding Mode ◽  
Docking Studies ◽  
Biological Evaluation ◽  
Reusable Catalyst ◽  
Tetrasubstituted Imidazoles

The synthesis of novel 1,2,4,5-tetrasubstituted imidazoles was carried out in a single molecular motif using niobia supported heteropoly tungstate as a mild and efficient reusable catalyst. The condensation of 3-aryl-1-phenyl-1H-pyrazole-4-carbaldehyde, aromatic amine, benzil, ammonium acetate and heteropoly tungstate supported on niobia was achieved under both conventional and non-conventional conditions. The employed protocol provides significant advantages, as it exhibits a remarkable catalytic activity on recovery, excellent yields and excellent reaction efficacy within short reaction times between 1-2 h (conventional) and 1-3 min (microwave radiation). All the obtained compounds were characterized by means of spectral data and elemental analysis. They were also screened for their antibacterial activity. To predict the binding mode of compounds with glutamine-fructose-6-phosphate transaminase (GlcN6P synthase), docking studies were performed.

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