scholarly journals Synthesis and Antimicrobial Activity of Some New Substituted Quinoxalines

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4198 ◽  
Author(s):  
Mohamed A. El-Atawy ◽  
Ezzat A. Hamed ◽  
Mahjoba Alhadi ◽  
Alaa Z. Omar
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Bacterial Species ◽  
Antimicrobial Spectrum ◽  
Fungal Strains ◽  
Nitrogen Nucleophiles

A number of new symmetrically and asymmetrically 2,3-disubstituted quinoxalines were synthesized through functionalization of 2,3-dichloroquinoxaline (2,3-DCQ) with a variety of sulfur and/or nitrogen nucleophiles. The structures of the obtained compounds were established based on their spectral data and elemental analysis. The antimicrobial activity for the prepared compounds was investigated against four bacterial species and two fungal strains. The symmetrically disubstituted quinoxalines 2, 3, 4, and 5 displayed the most significant antibacterial activity, while compounds 6a, 6b, and the pentacyclic compound 10 showed considerable antifungal activity. Furthermore, compounds 3f, 6b showed broad antimicrobial spectrum against most of the tested strains.

scholarly journals Synthesis and Antimicrobial Activity of 7-Hydroxy-3',4'-Methylenedioxy- and 7-Benzyloxy-3',4'-Methylenedioxy Flavanones

2017 ◽  
Vol 9 (3) ◽  
pp. 297-306 ◽  
Author(s):  
R. Ali ◽  
A. Rahim ◽  
A. Islam
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Elemental Analysis ◽  
The Other ◽  
Antifungal Activities ◽  
Fungal Strains ◽  
Antibacterial And Antifungal Activities ◽  
Other Hand ◽  
Antibacterial And Antifungal

7-Hydroxy-3',4'-methylenedioxy- and 7-benzyloxy-3',4'-methylenedioxy flavanones have been synthesized starting from 2,4-dihydroxyacetophenone. Subsequently biocidal activities of the flavanones have been investigated along with their corresponding chalcones against some bacterial and fungal strains. 2'-Hydroxy-4'-benzyloxy-3,4-methylenedioxy chalcone (5) and its corresponding flavanone (7) showed good antibacterial and antifungal activities against some selected bacterial and fungal strains. On the other hand, 2',4'-dihydroxy-3,4-methylenedioxy chalcone (4) showed no antibacterial and antifungal activities while its corresponding flavanone (6) showed a little antibacterial activity only at higher concentration but did not show antifungal activity. The synthesized chalcones and flavanones have been characterized using UV-Vis, IR and 1H NMRspectral data together with elemental analysis.

Synthesis and evaluation of chromene-based compounds containing pyrazole moiety as antimicrobial agents

2017 ◽  
Vol 23 (1) ◽  
Author(s):  
Mohamed Salah K. Youssef ◽  
Ahmed Abdou O. Abeed ◽  
Talaat I. El-Emary
Keyword(s):  
Antimicrobial Activity ◽  
Antifungal Activity ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Antimicrobial Agents ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Hybrid Compounds

AbstractWith an intention to synergize the antimicrobial activity of 1,3-diphenyl pyrazole and chromene derivatives, 20 hybrid compounds were synthesized and evaluated for their antimicrobial activity. Structures of the newly synthesized compounds were established by elemental analysis and spectral data. All compounds were evaluated for their antimicrobial activity against Gram positive and Gram negative bacteria and antifungal activity by a well diffusion method. Compounds

scholarly journals Synthesis and Antimicrobial Activity of Some Aldehyde Derivatives of 3-Acetylchromen-2-one

2010 ◽  
Vol 7 (s1) ◽  
pp. S400-S404 ◽  
Author(s):  
B. Lakshminarayanan ◽  
V. Rajamanickam ◽  
T. Subburaju ◽  
L. A. Pradeep Rajkumar ◽  
H. Revathi
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Candida Albicans ◽  
Antifungal Activity ◽  
Spectral Data ◽  
Aromatic Aldehyde ◽  
E Coli ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
Derivatives Of

Some new 3-(substituted)-chromen-2-one have been synthesized by condensation of 3-acetylchromen-2-one with various aromatic aldehyde in presence of ethanol and alkali. The synthesized compounds were identified by spectral data and screened for their antibacterial activity againstB. pumilis, B. substilisandE. coliand antifungal activity againstA. nigerandCandida albicans. Among the synthesized compounds, some compounds of aryl chromen, which are having electron releasing substituent such as methoxy and hydroxyl at various positions, showed moderate to considerable antibacterial and antifungal activities.

scholarly journals Facile Synthesis, Characterization, and In Vitro Antimicrobial Screening of a New Series of 2,4,6-Trisubstituted-s-triazine Based Compounds

2015 ◽  
Vol 2015 ◽  
pp. 1-10
Author(s):  
Ravi Bhushan Singh ◽  
Nirupam Das ◽  
Md. Kamaruz Zaman
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Elemental Analysis ◽  
Broad Spectrum ◽  
Antibacterial Efficacy ◽  
Facile Synthesis ◽  
Standard Drug ◽  
E Coli

A series of new 2,4,6-trisubstituted-s-triazine was synthesized, assessed for antimicrobial activity, and characterized by FTIR, 1HNMR, 13CNMR, and elemental analysis. The tested compounds, 4d, 4g, 4h, 4k, and 4n, have shown considerable in vitro antibacterial efficacy with reference to the standard drug ciprofloxacin (MIC 3.125 μgmL−1 against B. subtilis, E. coli, and K. pneumoniae). It was observed that compounds 4d and 4h displayed equipotent antibacterial efficacy against B. subtilis (MIC 3.125 μgmL−1) and S. aureus (MIC 6.25 μgmL−1). The studies demonstrated that the para-fluorophenylpiperazine substituted s-triazine (4n) was potent and exhibited broad spectrum antibacterial activity against S. epidermidis, K. pneumoniae, and P. aeruginosa with MIC of 6.25 μgmL−1 and for E. coli, it showed an MIC of 3.125 μgmL−1 equipotent with reference to the standard drug. Among all the compounds under investigation, compound 4g also demonstrated significant antifungal activity (3.125 μgmL−1) against C. albicans.

scholarly journals Efficient Synthesis of Novel Thiazole Substituted Pyrrolidine Derivatives and their Antimicrobial Evaluation

2020 ◽  
Vol 32 (8) ◽  
pp. 2007-2012
Author(s):  
Mahendra B. Bodake ◽  
Ghanshyam R. Jadhav ◽  
Vijay J. Medhane ◽  
Avinash D. Bholay
Keyword(s):  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Spectral Data ◽  
1H Nmr ◽  
Efficient Synthesis ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Fungal Strains ◽  
Minimum Inhibitory Concentrations ◽  
Antimicrobial Evaluation

A series of new molecules containing pyrrolidine and thiazole moiety (4a-l) were designed and synthesized. The structures of the synthesized compounds were characterized by IR, 1H NMR and mass spectral data. All the synthesized compounds were screened for their antibacterial activity against strains of bacteria as well as antifungal activity against fungal strains. Minimum inhibitory concentrations (MICs) of all the synthesized compounds were determined. The screening of title compounds revealed that most of the tested compounds showed moderate to good microbial inhibitions

SYNTHESIS AND ANTIMICROBIAL ACTIVITIES OF SOME NEW 1, 3, 4-OXADIAZOLES

INDIAN DRUGS ◽  
2012 ◽  
Vol 49 (08) ◽  
pp. 38-44
Author(s):  
S Desai ◽  
◽  
U. Laddi
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Aspergillus Niger ◽  
Spectral Data ◽  
Elemental Analysis ◽  
Antimicrobial Activities ◽  
Side Chain ◽  
Moderate Activity ◽  
Colletotrichum Capsici

Various 5-β-[(N-Benzenesulphonyl/tosyl)-4-(un) substituted anilino] ethyl-2-H/CH3/C6H5/-CH2C6H5/p-NO2C6H4-1,3,4-oxadiazoles (5a-d), 5--β-[(N-Benzenesulphonyl/tosyl)-4-(un)-substituted anilino] ethyl-2-(N,N-diethylamino/anilino/morpholino)-1, 3, 4-oxadiazoles (6a-r), 3--β-[(N-Benzenesulphonyl/tosyl)-4-(un) substituted anilino] ethyl-4-amino-5-mercapto-4(H)-1, 2, 4-triazoles (7a-f) and 5--β-[(N-Benzenesulphonyl/tosyl)-4-(un)substituted anilino] ethyl-3-(p-toluidino) methyl-1, 3, 4-oxadiazole-2-thiones (8a-f) with sulphonamide moiety at the side chain were synthesised. The structures of the newly synthesised compounds were established on the basis of their spectral data and elemental analysis. All the compounds were screened for antimicrobial activities against Escherichia coli, Bacillus cirroflagellosus, Aspergillus niger, Colletotrichum capsici. Most of the compounds have exhibited significant antifungal activity against Colletotrichum capsici, moderate activity against Aspergillus niger and minimum antibacterial activity against both the strains.

scholarly journals Synthesis and Antimicrobial Activity of some Novel Isoindoline-1,3-Dione Derivatives

2008 ◽  
Vol 8 (2) ◽  
pp. 1660-1666 ◽  
Author(s):  
Phoebe F. Lamie
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Broad Spectrum ◽  
Antimicrobial Activities ◽  
Fungal Strains

New phthalimido derivatives incorporated with chalcone, pyrazole,  pyrazoline, and pyrimidine moieties were synthesized and evaluated for their antimicrobial activities against bacterial and fungal strains. 2-{4-[1-Acetyl-5-(4-chlorophenyl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl} isoindoline-1,3-dione (7) showed broad spectrum antibacterial activity against both G+ and G- bacteria. While, (E)-2-{4-[3-(4-chlorophenyl)acryloyl]phenyl}isoindoline-1,3-dione (4b) showed promising antifungal activity.

A CuAAC Based Click Chemistry Approach for Synthesis of Quinoxaline-1,2,3-Triazole Hybrid Molecular Library and Its Antimicrobial Evaluation

2021 ◽  
Vol 6 (3) ◽  
pp. 235-242
Author(s):  
Bhoomi M. Makwana ◽  
Yogesh T. Naliapara
Keyword(s):  
Antimicrobial Activity ◽  
Antifungal Activity ◽  
Spectral Data ◽  
Broad Spectrum ◽  
Bacterial Species ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Hybrid Molecules ◽  
Antimicrobial Evaluation ◽  
Molecular Library

Copper(I)-catalyzed azide alkyne cycloaddition (CuAAC) methodology to develop a library of 3-methyl quinoxaline-1,2,3-triazole hybrid molecules. The designed molecules were synthesized via efficient and purification free method. The structures of the achieved compounds were recognized based on their spectral data. The antimicrobial activity for the synthesized compounds was evaluated against four bacterial species and two fungal strains. Six compounds are broad spectrum molecule, which can inhibit the growth of both Gram-positive and Gram-negative bacteria. Two molecules show mainly antifungal activity. Compound 6e shows highest antibacterial as well as antifungal activity.

Synthesis, photosensitization and antimicrobial activity evaluation of some novel Merocyanine dyes

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Aspergillus Flavus ◽  
Elemental Analysis ◽  
Cyanine Dyes ◽  
Fungal Strains ◽  
Activity Evaluation ◽  
Visible Spectra ◽  
Merocyanine Dyes

Novel acyclic and cyclic merocyanine dyes derived from the nucleu of furo [(3,2-d) pyrazole; ( d 2 , 3 )imidazole]were prepared. The electronic visible absorptionspectra of all the synthesized new cyanine dyes were examined in 95% ethanolsolution to evaluate their photosensitization properties. Antibacterial andantifungal activities for some selected dyes were tested against various bacterialand fungal strains (Escherichia coli, Staphylococcus aureus, Aspergillus flavus andCandida albicans) to evaluate their antimicrobial activity. Structural identificationwas carried out via elemental analysis, visible spectra, IR and 1H NMRspectroscopic data.

Complexes of Cu (II) with a-Ketoglutaric Acid and 1- (o-tolyl) Biguanide Synthesis, characterization and biological Activity

2019 ◽  
Vol 70 (10) ◽  
pp. 3603-3610
Author(s):  
Madalina Mihalache ◽  
Cornelia Guran ◽  
Aurelia Meghea ◽  
Vasile Bercu ◽  
Ludmila Motelica ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Biological Activity ◽  
Candida Albicans ◽  
Antifungal Activity ◽  
Copper Complexes ◽  
Substrate Adhesion ◽  
Inert Substrate

The three copper complexes having a-ketoglutaric acid (H2A) and 1- (o-tolyl) biguanide (TB) ligands have been synthesized and characterized. The proposed formulas for these complexes are: [Cu(TB)(HA)]Cl (C1), [Cu(TB)(HA)CH3COO]�H2O (C2) and [Cu(TB)(HA)](NO3) (C3) where HA represents deprotonated H2A. The complexes obtained were tested for antibacterial activity against Staphylococcus aureus ATCC 25923 and Pseudomonas aeruginosa ATCC 27853, antifungal activity on Candida albicans ATCC 10231 and antitumor activity on HeLa tumor cells. Due to the antitumor, antifungal, antimicrobial activity and inhibition of inert substrate adhesion, complexes synthesized could be used for potential therapeutic applications.

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