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36 articles for “Schiff bases”
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Spectral, thermal, electrochemical and biological studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes derived from 4-(3-bromo-4-hydroxy-5-methoxybenzylideneamino)-3-mercapto-6-methyl-5-oxo-1,2,4-triazine.
Abstract: The Schiff base4-(3-bromo-4-hydroxy-5-methoxybenzylideneamino)-3-mercapto-6-methyl-5-oxo-1,2,4-triazine and its Co(II), Ni(II), Cu(II) and Zn(II) complexes have been synthesized and characterized by IR, NMR, electronic, ESR, fluorescence, thermal, magnetic moment and electrochemical studies. IR and thermal data support the presence of coordinated water in the metal complexes. The electronic spectral and magnetic moment measurements indicate octahedral geometry for Co(II), Ni(II) and Zn(II) complexes and square planar for Cu(II) complexes. Biological studies of the ligand and …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 5, Issue 1, 2014 · pp. 6–16 Read article
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Study of the Hammett equation for oxidation of 2 – Hydroxy – 1 - Naphthalidene Anil and para substituted chloroanils by potassium bromate in acid medium
Abstract: The kinetics of oxidation of the Schiff base and its substituted anils by potassium bromate in aquo-acetic acid medium has been studied in this work. The study of thermodynamic parameters is done, and the rate constants for the reaction are determined. The plot of log{ks/k0} against the substituent constant (ï³ ) is plotted for para and meta substitution and the reaction constant (ï²) is calculated. The plot of ï„H against …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 7, Issue 2, 2016 · pp. 1–4 Read article
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Design, Synthesis, and in vitro Evaluation of Novel Benz/Imidazole-2-acetonitrile Derivatives as Antibacterial and Antifungal Agents
Abstract: Benzimidazole is a pharmaceutically important compound. In this research, we were able to prepare several heterocyclic derivatives from it by first preparing a new azo derivative ZH through a reaction of 3-aminoacetophenone with benzimidazole-2-acetonitrile. This azo derivative was then introduced via a condensation reaction with aromatic amine derivatives, resulting in the preparation of two Schiff base derivatives Z1 and Z2. From these bases, six and seven membered heterocyclic derivatives were …
Published in Emerging Trends in Chemical Engineering · Vol. 13, Issue 2, 2026 · pp. 53–87 Read article
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Synthesis, Structural Studies and Catalytic activity of Copper(II) Complex Supported by N, N′-bis (2-Hydroxy-3-Methoxybenzaldehyde) 4-Methylbenzene-1, 2-Diamine
Abstract: A novel robust method for synthesis of 3-MOBdMBn-Cu complex, supported by -ONNO-tetradentate Schiff-base ligand is presented. This copper complex is prepared by the reactions of metal solution with one molar equivalent of 3-MOBdMBn (N, N’-bis (2-hydroxy-3-methoxybenzaldehyde) 4-Methylbenzene-1, 2-diamine) Schiff-base ligand in methanol under nitrogen atmosphere. In contrast to other catalysts, the main advantage of this catalyst system was that the cost of the catalyst was remarkably low and it can …
Published in Journal of Catalyst & Catalysis · Vol. 1, Issue 1, 2014 · pp. 53–60 Read article
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Synthesis and Characterization of m-Amino Pyridine Derivatives
Abstract: Background: The current study involves the synthesis and characterization of amino derivatives. In the current research study, a series of m-amino pyridine derivatives were synthesized using m-amino pyridine and carbonyl compounds and characterized further. The pyridine derivatives have shown to possess potent antibacterial, antifungal, antitumor, antimalarial, anti-inflammatory antidiabetic, antioxidant, anthelmintic, anticonvulsant, antituberculous and so many other properties. Method: The condensation reaction of m-amino pyridine and carbonyl derivatives with ethanol is …
Published in Research & Reviews: A Journal of Drug Formulation, Development and Production · Vol. 10, Issue 2, 2023 · pp. 1–6 Read article
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Synthesis of Some Novel Formazan Derivatives with Potential Antimicrobial Spectrum
Abstract: A sequence of new substituted formazan derivatives has been synthesized from corresponding aryl diazonium chloride and Schiff base in pyridine. The synthesized compounds were recognized by spectral studies and screened for the antimicrobial activities for those drugs. Keywords: Schiff Base, Formazan, Antimicrobial ActivityCite this Article:Jain A, Radiya P. Synthesis of Some Novel Formazan Derivatives with Potential Antimicrobial Spectrum. Research & Reviews: A Journal of Drug Design & Discovery. 2015; 2(1): …
Published in Research & Reviews: A Journal of Drug Design & Discovery · Vol. 2, Issue 1, 2015 · pp. 1–5 Read article
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Metal Complexes of Cephalexin and Their Biological Activities: A Review
Abstract: Cephalexin and its derivatives are commonly utilized in the pharmaceutical and medicinal industry due to their biological and pharmaceutical activities, including anti-microbial, anti-cancer, anti-bacterial, and herbicidal activities as well as possessing high palatability and being useful for skin and joint infections. Interestingly, some organic drugs, including cephalexin, which exhibit toxicological and pharmacological properties, can be administered in forms of metal complexes. Many researchers have synthesized organic ligands derived from cephalexin …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 52–61 Read article
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Synthesis ,Spectral Investigation, Anticancer Study of Azo-Imine Heterocyclic Compounds
Abstract: Many Schiff base reactions are known within a famous series of addition reactions to the azomethine group, where reagents are added to the polarized double bond and the nucleophilic (nucleophilic) reagents attack the carbon atom in the azomethine bond.. An example of this type of reaction is the addition of alkyl halides, which produces quaternary amine salts, which in turn are converted to the secondary amine. These compounds have an …
Published in Emerging Trends in Chemical Engineering · Vol. 11, Issue 1, 2024 · pp. 22–43 Read article
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Design, Synthesis and Evaluation of Antitubercular Activity of Mannich Bases of Isoniazid-Containing Thiazolidin-4-one Rings
Abstract: Isoniazid (INH), the established antitubercular drug was selected as the lead for the design and development of antitubercular agents by many researchers. 4-thiazolidinones are well known heterocyclic compounds for their spectrum of biological activities such as antibacterial, antifungal [1], anticancer [2], antitubercular, anthelmintic, anti-inflammatory [3], analgesic [4], antithyroid, local anaesthetic, monoamine oxidase inhibition, anti-Toxoplasma gondii activity etc [5]. Modification of thiazolidinones via Mannich reaction to improve biological activity is also …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 7, Issue 1, 2016 · pp. 1–12 Read article
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Synthesis of Magnetically Recoverable Nickel (II) Complex-Functionalized Fe3O4@ISNA (ISNA= Isonicotinic acid) Nanomaterials: Catalytic Studies on Nitrophenol Reduction and TD- DFT Studies
Abstract: In this study, we aimed to develop a novel, environmentally sustainable, and magnetically separable heterogeneous nanocatalyst, denoted as Fe3O4@ISNA@NiL (where L represents the ligand). The synthesis involved a two-step process, first, isonicotinic acid was chemically grafted onto the surface of iron oxide nanoparticles (Fe3O4) to introduce functional groups capable of further chemical modification. Subsequently, a nickel(II) Schiff base monomeric complex was anchored onto the modified surface, resulting in a nanocatalyst …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 88–96 Read article
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Synthesis of Magnetically Recoverable Nickel (II) Complex-Functionalized Fe 3 O 4 @ISNA (ISNA= Isonicotinic acid) Nanomaterials: Catalytic Studies on Nitrophenol Reduction and TD- DFT Studies
Abstract: In this study, we aimed to develop a novel, environmentally sustainable, and magnetically separable heterogeneous nanocatalyst, denoted as Fe 3 O 4 @ISNA@NiL (where L represents the ligand). The synthesis involved a two-step process, first, isonicotinic acid was chemically grafted onto the surface of iron oxide nanoparticles (Fe 3 O 4 ) to introduce functional groups capable of further chemical modification. Subsequently, a nickel(II) Schiff base monomeric complex was anchored …
Published in Journal of Polymer & Composites Read article
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Homodinuclear and Heterodinuclear Sulphocyanate Bridged Lewis Acid Complexes: An Insight into their Reactivity and Structural Flexibility
Abstract: This precpective reports the synthesis of homodinuclaer and heterodinuclear complexes of the type MM (SCN)4 and MM/ (SCN)4 (M-Co2+ , Ni, M/ , = Cd2+, Hg2+) with N.N' Bis (salicylidene) 1,2- plionylendfamine. A superficial insight has also been reported about their reactivity and structural flexibility. The complexes have been characterized on the basis of elemental analysis, conductivity measurements, magnetic susceptibility measurements, Proton magnetic resonance UV-Visible and midIR spectral studies. The …
Published in Journal of Nuclear Engineering & Technology · Vol. 11, Issue 1-2, 2021 · pp. 42–47 Read article
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Review of the Effect of Imine, Azo, and Formazan Compounds on the Cell Membrane of Bacteria, Fungi, and Their Inhibition of Activity
Abstract: The role of antibiotics is to reduce the resistance of bacterial and fungal cell membranes, thereby penetrating the cell membrane and causing bacterial death. Therefore, researchers have turned to preparing chemical compounds that mimic antibiotics in their ability to eliminate bacteria and microorganisms. Through ongoing research in the field of biological activity, recent decades have witnessed a significant increase in laboratory experiments involving imines, formazan, and other compounds in this …
Published in International Journal of Membranes · Vol. 3, Issue 2, 2026 · pp. 1–10 Read article
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Review on The effect of Imine, Azo, and Formazan Compounds on The cell Membrane of Bacteria, Fungi and Their inhibition of Activity
Abstract: The role of antibiotics is to reduce the resistance of bacterial and fungal cell membranes, thereby penetrating the cell membrane and causing bacterial death. Therefore, researchers have turned to preparing chemical compounds that mimic antibiotics in their ability to eliminate bacteria and microorganisms. Through ongoing research in the field of biological activity, recent decades have witnessed a significant increase in laboratory experiments involving imines, formazan, and other compounds in this …
Published in International Journal of Membranes · Vol. 3, Issue 2, 2026 Read article
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Synthesis of Novel Series of Coumarin Derivatives
Abstract: In a synthetic method similar to Knoevenagel reaction, 3-acetyl coumarin was prepared in the same way through a cyclization condensation reaction betweensalicylaldehyde and ethyl acetoacetate under basic condition using piperidine. Hence, 3-acetyl coumarin as a starting material was reacted with bromine in ether using a Lewis acid as a reactioncatalyst to produce the corresponding α–bromoaceyl cromen-2-one derivative. In application ofHantzsch synthesis, the reaction of α–bromoaceyl cromen-2-one with thioacetamide in ether …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 12, Issue 1, 2021 · pp. 1–8 Read article
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Synthesis and Anti - Inflammatory Activity of A Novel Series of Quinoxaline2, 3-Dione Derivatives
Abstract: Aim: The aim of the present study is to synthesis and screening the anti-inflammatory effect of novel series of quinoxaline 2, 3Dione derivatives containing a 4-thiazolidinone (T1-T5) nucleus. Method: Thesynthesis of thiazolidinones by reacting N-substituted arylidene/heteroarylidene Quinoxaline 2, 3-dione with thioglycollic acid in the presence of dry benzene. All the title compounds were tested for their anti-inflammatory activity of the synthesized compounds was evaluated by Carrangeenan induced paw edema method …
Published in Research and Reviews: A Journal of Pharmaceutical Science · Vol. 11, Issue 3, 2020 · pp. 7–13 Read article