scholarly journals Synthesis of Thiophenyl Thiazole Based Novel Quinoxaline Derivatives

2015 ◽  
Vol 51 ◽  
pp. 115-124
Author(s):  
Haresh G. Kathrotiya ◽  
Yogesh T. Naliapara
Keyword(s):  
Aromatic Amine ◽  
Elemental Analysis ◽  
Condensation Reaction ◽  
High Yield ◽  
Experimental Procedure ◽  
H Nmr ◽  
Quinoxaline Derivatives ◽  
Ft Ir ◽  
C Nmr

A new series of thiophenyl thiazole based novel quinoxaline derivatives 4a-4t have been synthesized by base catalysed condensation reaction. In which 6-substituted 2,3-dichloroquinoxaline 1a and 4-(thiophen-2-yl) thiazol-2-amine 2b reacted in basic condition to afford intermediate 3c which reacts with various aromatic amine to form final compounds. Easy experimental procedure, high yield, and selectivity are the imperative features of this method. The identity of all the compounds has been established by 1H NMR, 13C NMR, FT-IR, and elemental analysis.

scholarly journals Synthesis of Novel Triazolo[4,3-a]Quinoxaline Darivatives Containing Pyridinyl and Thiazole Nucleous

2015 ◽  
Vol 52 ◽  
pp. 63-73
Author(s):  
Haresh G. Kathrotiya ◽  
Yogesh T. Naliapara
Keyword(s):  
Reaction Time ◽  
Elemental Analysis ◽  
High Yield ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr ◽  
Quinoxaline Derivatives ◽  
Ft Ir ◽  
New Compounds ◽  
C Nmr

On pursuing research about [1,2,4] triazolo [4,3-a] quinoxaline, in this paper we report a small library of novel class of [1,2,4] triazolo [4,3-a] quinoxaline derivatives containing pyridinyl thiazole moiety. Particularly valuable features of this method include high yield, broad substrate scope, shorter reaction time and straightforward procedure. The structures of new compounds have been characterized on the basis of elemental analysis, FT-IR, 1H NMR, 13C NMR, and mass spectral data.

scholarly journals Synthesis of some New Quinoxalines Bearing Pyridinyl Thiazole Moiety

2015 ◽  
Vol 52 ◽  
pp. 74-83
Author(s):  
Haresh G. Kathrotiya ◽  
Yogesh T. Naliapara
Keyword(s):  
Elemental Analysis ◽  
Condensation Reaction ◽  
Mass Spectral Data ◽  
Structural Class ◽  
Mass Spectral ◽  
H Nmr ◽  
Chemical Structures ◽  
Quinoxaline Derivatives ◽  
Ft Ir ◽  
C Nmr

Keeping the objective to build up a new structural class of quinoxaline, a new series of quinoxaline derivatives bearing the pyridinyl thiazole nucleus have been synthesized by base-catalyzed chloro-amine condensation reaction approach. The protocol offers expeditious and easy synthesis with excellent yield. The chemical structures of the synthesized compounds were elucidated by 1H NMR, 13C NMR, FT-IR, elemental analysis, and mass spectral data.

scholarly journals An Efficient and Clean Synthesis of Thiophenyl Thiazole Depended Novel Triazolo[4,3-a]Quinoxaline Derivatives

2015 ◽  
Vol 51 ◽  
pp. 125-134
Author(s):  
Haresh G. Kathrotiya ◽  
Sagar P. Gami ◽  
Yogesh T. Naliapara
Keyword(s):  
Schiff Base ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
H Nmr ◽  
Clean Synthesis ◽  
Quinoxaline Derivatives ◽  
Ft Ir ◽  
C Nmr

A simple and efficient approach for the synthesis of thiophenyl thiazole based triazolo [4,3-a] quinoxaline derivatives is described. In this methodology, 3-hydrazinyl-N-(4-(thiophen-2-yl) thiazol-2-yl) quinoxalin-2-amine derivatives treated with various aromatic aldehyde to form Schiff base which on treatment with iodobenzene diacetate in dichloromethane at room temperature to furnish title compounds. The synthesized compounds were characterized by 1H NMR, 13C NMR, FT-IR, elemental analysis, and mass spectral data

scholarly journals SYNTHESIS AND STRUCTURAL ELUCIDATION OF AMINO ACETYLENIC AND THIOCARBAMATES DERIVATIVES FOR 2-MERCAPTOBENZOTHIAZOLE AS ANTIMICROBIAL AGENTS

2017 ◽  
Vol 9 (2) ◽  
pp. 192
Author(s):  
Aseel Alsarahni ◽  
Zuhair Muhi Eldeen ◽  
Elham Al-kaissi ◽  
Ibrahim Al- Adham ◽  
Najah Al-muhtaseb
Keyword(s):  
Antimicrobial Activity ◽  
Elemental Analysis ◽  
Antimicrobial Agents ◽  
Diffusion Method ◽  
Benzothiazole Derivatives ◽  
H Nmr ◽  
Ft Ir ◽  
Potential Antimicrobial Activity ◽  
C Nmr

<p><strong>Objective: </strong>To design and synthesize amino acetylenic and thiocarbonate of 2-mercapto-1,3-benthiazoles as potential antimicrobial agents.</p><p><strong>Methods: </strong>A new series of 2-{[4-(t-amino-1-yl) but-2-yn-1-yl] sulfanyl}-1,3-benzothiazole derivatives (AZ1-AZ6), and S-1,3-benzothiazol-2-yl-O-alkyl carbonothioate derivatives were synthesised, with the aim that the target compounds show new and potential antimicrobial activity. The elemental analysis was indicated by the EuroEA elemental analyzer, and biological characterization was via IR, <sup>1</sup>H-NMR, [13]C-NMR, DSC were determined with the aid of Bruker FT-IR and Varian 300 MHz spectrometer using DMSO-d<sub>6</sub> as a solvent.<em> </em><em>In vitro </em>antimicrobial activity, evaluation was done for the synthesised compounds, by agar diffusion method and broth dilution test. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) were determined. <em></em></p><p><strong>Results: </strong>The IR, <sup>1</sup>H-NMR, <sup>13</sup>C-NMR, DSC and elemental analysis were consistent with the assigned structures. Compound of 2-{[4-(4-methylpiperazin-1-yl)but-2-yn-1-yl] sulfanyl}-1,3-benzothiazole (AZ1), 2-{[4-(2-methylpiperidin-1-yl)but-2-yn-1-yl]sulfanyl}-1,3-benzothiazole (AZ2), 2-{[4-(piperidin-1-yl) but-2-yn-1-yl]sulfanyl}-1, 3-benzothiazole (AZ6), S-1,3-benzothiazol-2-yl-O-ethyl carbonothioate (AZ7), and S-1,3-benzothiazol-2-yl-O-(2-methylpropyl) carbonothioate (AZ9) showed the highest antimicrobial activity against <em>Pseudomonas aeruginosa </em>(<em>P. aeruginosa</em>), AZ-9 demonstrated the highest antifungal activity against <em>Candida albicans </em>(<em>C. albicans</em>), with MIC of 31.25 µg/ml.</p><p><strong>Conclusion: </strong>These promising results promoted our interest to investigate other structural analogues for their antimicrobial activity further.</p>

scholarly journals Zinc Oxide Nanoparticles Catalyzed Condensation Reaction of Isocoumarins and 1,7-Heptadiamine in the Formation of Bis-Isoquinolinones

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Varadhan Krishnakumar ◽  
Kesarla Mohan Kumar ◽  
Badal Kumar Mandal ◽  
Fazlur-Rahman Nawaz Khan
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Condensation Reaction ◽  
High Yield ◽  
Oxide Nanoparticles ◽  
Acid Chlorides ◽  
Zno Nps ◽  
H Nmr ◽  
Yield And Purity ◽  
C Nmr

The diversified bis-isoquinolinones were obtained in two steps, utilizing homophthalic acid and various acid chlorides providing 3-substituted isocoumarins in the first step which on further condensation with 1,7-heptadiamine involving C–N bond formation from the lactone in the presence of 10 mol% zinc oxide nanoparticles (ZnO NPs) (<150 nm) afforded the desired bis-isoquinolinones in high yield and purity. The synthesized compounds were then characterized using FTIR,1H NMR,13C NMR, and HRMS techniques.

Novel mono- and heterobimetallic chromium−nickel s-indacene complexes: synthesis, characterization, and DFT studies

2014 ◽  
Vol 92 (7) ◽  
pp. 677-683 ◽  
Author(s):  
Cesar Morales-Verdejo ◽  
Eduardo Schott ◽  
Ximena Zarate ◽  
Juan Manuel Manriquez
Keyword(s):  
Cyclic Voltammetry ◽  
Elemental Analysis ◽  
Molecular System ◽  
Theoretical Calculations ◽  
Dft Studies ◽  
Nickel Compound ◽  
H Nmr ◽  
Bridging Ligand ◽  
Ft Ir ◽  
C Nmr

The preparation of a novel heterobimetallic chromium−nickel compound (3), including 2,6-diethyl-4,8-dimethyl-5-hydroindacenide (IcH′) as bridging ligand was successfully achieved and it was characterized by means of 1H NMR, 13C NMR, and FT-IR spectroscopies and elemental analysis. Cyclic voltammetry studies were performed for complex 3 as well as for its respective mononuclear species. Theoretical calculations of this compound were carried out to gain further understanding of this novel molecular system.

scholarly journals Synthesis of Tert-Octylsalicylaldoxime and Its Application in Extraction of Cu(II)

2021 ◽  
Vol 9 ◽  
Author(s):  
Liqing Li ◽  
Luo Feng ◽  
Chunfa Liao ◽  
Fangxu Li ◽  
Liqin Yang
Keyword(s):  
Elemental Analysis ◽  
Extraction Ability ◽  
One Pot ◽  
H Nmr ◽  
Alkyl Groups ◽  
Ft Ir ◽  
Copper Nickel Alloy ◽  
The One ◽  
Yield And Purity ◽  
C Nmr

The alkyl salicylaldoxime has attracted more and more attention recently due to the complex branched alkyl groups. In this study, a novel alkyl salicylaldoxime, tert-octylsalicylaldoxime, was successfully synthesized by the one-pot method. The yield and purity by the elemental analysis were 96.17 and 94.13%, respectively. The structure was confirmed by elemental analysis, FT-IR, 1H NMR (Nuclear Magnetic Resonance), 13C NMR spectroscopy, and MS. Results showed that tert-octylsalicylaldoxime with a new structure exhibited excellent extraction ability and selectivity for Cu(II) and can be successfully used to recover Cu from copper-nickel alloy electroplating wastewater. Thus, this product has the potential to be used as a powerful copper extractant in the future.

Synthesis, Characterization and Photophysicochemical Properties of Zinc(Ii) Phthalocyanine With New Benzenesulfonamide Derivative Substituents

2021 ◽  
Author(s):  
Gülen Atiye Öncül ◽  
Ömer Faruk Öztürk ◽  
Mehmet Pişkin
Keyword(s):  
Elemental Analysis ◽  
Mass Spectra ◽  
Spectroscopic Methods ◽  
H Nmr ◽  
Maldi Tof Mass Spectra ◽  
New Type ◽  
Ft Ir ◽  
Photochemical Properties ◽  
Photocatalytic Applications ◽  
C Nmr

Abstract Novel (E)-4-((5-bromo-2-hydroxy-3-methoxybenzylidene)amino)-N-(pyridin-2-yl)benzenesulfonamide 1, (E)-4-((5-bromo-2-(3,4-dicyanophenoxy)-3-methoxybenzylidene)amino)-N-(pyridin-2-yl)benzene sulfonamide 2 and 2(3),9(10),16(17),23(24)-tetra-[(E)-4-((5-bromo-3-methoxy-2-(λ1-oxidanyl)benzyl idene)amino)-N-(pyridine-2-yl)benzenesulfonamide]phthalocyaninato zinc(II) phthalocyanine 3 were synthesized. Their (1-3) structures were illuminated with spectroscopic methods such as FT-IR, 1H NMR,13C NMR, UV–vis, MALDI-TOF mass spectra and also elemental analysis. The spectroscopic, photophysical and photochemical properties of the zinc(II) phthalocyanine 3 were investigated in dimethyl sulfoxide and its effects on the above mentioned properties were reported as a result of containing new type benzenesulfonamide derivatives as substituents. In addition, its above-mentioned properties were reported by comparing different species with those of their substituted and/or unsubstituted counterparts. The zinc(II) phthalocyanine 3 has photosensitizing abilities suitable and sufficient especially for photocatalytic applications.

Synthesis of Zingerone Using NiCl2•6H2O-NaBH4 as a Selective Hydrogenation Reaction Agent

2019 ◽  
Vol 948 ◽  
pp. 127-132
Author(s):  
Murdiah ◽  
Deni Pranowo ◽  
Tri Joko Raharjo
Keyword(s):  
Mild Condition ◽  
Selective Hydrogenation ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Hydrogenation Reaction ◽  
Second Step ◽  
H Nmr ◽  
Ft Ir ◽  
High Yields ◽  
C Nmr

Synthesis of zingerone (4-(4-hydroxy-3-methoxyphenyl)-2-butanone) has been done. The first step was to synthesize the compound (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) through a cross aldol condensation reaction between vanilin:acetone mol ratio of 1:5:5, for 5 hours in high yields (97%). The second step was the selective hydrogenation of (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) with NiCl2•6H2O-NaBH4 catalyst in mild condition. Based on the FT-IR, 13C-NMR and 1H-NMR and GC-MS analyses, the synthesis of zingerone has been successfully synthesized by selective hydrogenation reaction with 80% yield.

scholarly journals Asphaltene biotransformation for heavy oil upgradation

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Arif Nissar Zargar ◽  
Ankur Kumar ◽  
Anurag Sinha ◽  
Manoj Kumar ◽  
Ioannis Skiadas ◽  
...  
Keyword(s):  
Crude Oil ◽  
Elemental Analysis ◽  
Heavy Oil ◽  
Microbial Consortium ◽  
High Viscosity ◽  
Heavy Crude Oil ◽  
H Nmr ◽  
Ft Ir ◽  
Heavy Crude ◽  
C Nmr

AbstractGlobally, the reserves of heavy crude oil are seven times more abundant than that of light crude, and yet, they are underutilized because of their high viscosity and density, which is largely due to the presence of large amounts of asphaltenes. Biotransformation of heavy oil asphaltenes into smaller metabolites can be used for reducing their viscosity. Several microorganisms capable of asphaltene biodegradation have been reported but only few have been characterized for its biotransformation. In the present study, a 9-membered microbial consortium was isolated from an oil contaminated soil. About 72% and 75% asphaltene biotransformation was achieved by growing cells at shake flask level and in a 1.5 l bioreactor, respectively. A representative structure of asphaltene was constructed based on LC–MS, 1H-NMR, 13C-NMR, FT-IR, ICPMS and elemental analysis (CHNS) of n-heptane purified asphaltene from Maya crude oil. Biotransformation of asphaltene, as analyzed by performing 1H-NMR, FT-IR and elemental analysis, resulted in 80% decrease in S and N when compared to the control along with incorporation of oxygen in the structure of asphaltene. About 91% decrease in the viscosity of the Maya crude oil was observed after two weeks when oil: aqueous phase ratio was 1:9. The results suggest that the isolated microbial consortium can be used for biological upgradation of heavy crude oil. To our knowledge, this is the first report where a microbial consortium resulted in such high asphaltene biotransformation.

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