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Ghanghas P, Choudhary A, Kumar D, Poonia K. Coordination metal complexes with Schiff bases: Useful pharmacophores with comprehensive biological applications. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108710] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Cebeci YU, Ceylan S, Demirbas N, Karaoğlu ŞA. Microwave-assisted Synthesis of Novel Mannich Base and Conazole Derivatives Containing Biologically Active Pharmacological Groups. LETT DRUG DES DISCOV 2021. [DOI: 10.2174/1570180817999201016154034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The aim of this study was to synthesize new mannich bases and conazol
derivatives with biological activity by the microwave-assisted method.
Introduction:
1,2,4-Triazole-3-one (3) acquired from tryptamine was transformed to the corresponding
carbox(thio)amides (6a-c) via several steps. Compounds 6a-c were refluxed with sodium hydroxide
to yield 1,2,4-triazole derivatives (7a-c). Compounds 3 and 7a-c on treatment with different
heterocyclic secondary amines in an ambiance with formaldehyde afforded the mannich bases 8-15
having diverse pharmacophore units with biologically active sites. The reaction of compound 3 and
2-bromo-1-(4-chlorophenyl) ethanone in the presence of sodium ethoxide gave the corresponding
product 2-substituted-1,2,4-triazole-3-one, 16, which was reduced to 1,2,4-triazoles (17). Synthesis
of compounds 18, 19, and 20 was carried out starting from compounds 17 with 4-chlorobenzyl
chloride (for 18), 2,4-dichlorobenzyl chloride (for 19), and 2,6-dichlorobenzyl chloride (for 20).
Methods:
he conventional technique was utilized for the synthesis of compounds, 3-7, and microwave-
assisted technique for the compounds, 8-20. That is, green chemistry techniques were applied
during these reactions. The structures of molecules were elucidated on the foundation of 1H NMR,
13C NMR, FT-IR, EI-MS methods, and elemental analysis. Novel synthesized molecules were investigated
for their antimicrobial activity using MIC (minimum inhibitory concentration) method.
Results:
Aminoalkylation of triazole derivatives 3 and 7a-c with fluoroquinolones such as ciprofloxacin
and norfloxacin provided an enhancement to the bioactivity of mannich bases 8-11 against
the tested microorganisms. The MIC values ranged between <0.24 and 3.9 μg/mL. Moreover, molecules
10 and 11 exhibited more effects on M. smegmatis than the other compounds by the MIC
values of <1 μg/mL. They have shown very good antituberculosis activity.
Conclusion:
Most of the synthesized structures were observed to have excellent antimicrobial activity
against most microorganisms taken into account. These molecules have better activity than the
standard drug ampicillin and streptomycin.
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Affiliation(s)
- Yıldız Uygun Cebeci
- Department of Chemistry, Karadeniz Technical University, 61080, Trabzon,Turkey
| | - Sule Ceylan
- Artvin Çoruh University, Department of Occupational Health and Safety, 08000, Artvin,Turkey
| | - Neslihan Demirbas
- Department of Chemistry, Karadeniz Technical University, 61080, Trabzon,Turkey
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Supermagnetic Nano-Bifunctional Catalyst from Rice Husk: Synthesis, Characterization and Application for Conversion of Used Cooking Oil to Biodiesel. Catalysts 2020. [DOI: 10.3390/catal10020225] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The present work investigated the biodiesel production from used cooking oil catalyzed by nano-bifunctional supermagnetic heterogeneous catalysts (RHC/K2O/Fe) derived from rice husk doped with K2O and Fe synthesized by the wet impregnation method. The synthesized catalysts (RHC/K2O/Fe) were characterized for crystallinity by X-ray diffraction spectroscopy (XRD), total acidity and basicity using CO2/NH3-TPD, textural properties through Brunauer-Emmett-Teller (BET), thermal stability via thermogravimetric analyzer (TGA), functional group determination by Fourier-transform infrared spectroscopy (FTIR), surface morphology through field emission scanning electron microscopy (FESEM), and magnetic properties by vibrating sample magnetometer (VSM). The VSM result demonstrated that the super-paramagnetic catalyst (RHC/K2O-20%/Fe-5%) could be simply separated and regained after the reaction using an external magnetic field. The operating conditions such as catalyst loading, methanol/oil molar ratio, temperature, and reaction duration were studied. The screened RHC/K2O-20%/Fe-5% catalyst was selected for further optimization and the optimum reaction parameters found were 4 wt % of catalyst, a molar ratio of methanol/oil of 12:1, 4 h reaction duration, and 75 °C reaction temperature with a maximal yield of 98.6%. The reusability study and reactivation results revealed that the nano-bifunctional magnetic catalyst (RHC/K2O-20%/Fe-5%) could be preserved by high catalytic activity even after being reused five times.
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Alothman AA, Al-Farraj ES, Al-Onazi WA, Almarhoon ZM, Al-Mohaimeed AM. Spectral characterization, electrochemical, antimicrobial and cytotoxic studies on new metal(II) complexes containing N2O4 donor hexadentate Schiff base ligand. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Beillard A, Bantreil X, Métro TX, Martinez J, Lamaty F. Alternative Technologies That Facilitate Access to Discrete Metal Complexes. Chem Rev 2019; 119:7529-7609. [PMID: 31059243 DOI: 10.1021/acs.chemrev.8b00479] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Organometallic complexes: these two words jump to the mind of the chemist and are directly associated with their utility in catalysis or as a pharmaceutical. Nevertheless, to be able to use them, it is necessary to synthesize them, and it is not always a small matter. Typically, synthesis is via solution chemistry, using a round-bottom flask and a magnetic or mechanical stirrer. This review takes stock of alternative technologies currently available in laboratories that facilitate the synthesis of such complexes. We highlight five such technologies: mechanochemistry, also known as solvent-free chemistry, uses a mortar and pestle or a ball mill; microwave activation can drastically reduce reaction times; ultrasonic activation promotes chemical reactions because of cavitation phenomena; photochemistry, which uses light radiation to initiate reactions; and continuous flow chemistry, which is increasingly used to simplify scale-up. While facilitating the synthesis of organometallic compounds, these enabling technologies also allow access to compounds that cannot be obtained in any other way. This shows how the paradigm is changing and evolving toward new technologies, without necessarily abandoning the round-bottom flask. A bright future is ahead of the organometallic chemist, thanks to these novel technologies.
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Affiliation(s)
- Audrey Beillard
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Xavier Bantreil
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Thomas-Xavier Métro
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Jean Martinez
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Frédéric Lamaty
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247, CNRS, Université de Montpellier, ENSCM, Campus Triolet, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
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Mermer A, Demirbas N, Uslu H, Demirbas A, Ceylan S, Sirin Y. Synthesis of novel Schiff bases using green chemistry techniques; antimicrobial, antioxidant, antiurease activity screening and molecular docking studies. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.12.114] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Shaghaghi Z, Rezanezhad R. New Chloro-Based Azo-Azomethine Dyes: Synthesis, Biological and Optical Spectroscopic Studies for Detection of some Transition Metal Ions. ChemistrySelect 2018. [DOI: 10.1002/slct.201800431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zohreh Shaghaghi
- Department of Chemistry; Faculty of Science; Azarbaijan Shahid Madani University, Kilometere 35; Tabriz / Azarshahr Rd Tabriz 53714-161 Iran
| | - Rezvaneh Rezanezhad
- Department of Chemistry; Faculty of Science; Azarbaijan Shahid Madani University, Kilometere 35; Tabriz / Azarshahr Rd Tabriz 53714-161 Iran
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Halide/pseudohalide complexes of cadmium(II) with benzimidazole: Synthesis, crystal structures and fluorescence properties. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mishra N, Poonia K, Soni SK, Kumar D. Synthesis, characterization and antimicrobial activity of Schiff base Ce(III) complexes. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.05.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ultrasound assisted synthesis, characterization and electrochemical study of a tetradentate oxovanadium diazomethine complex. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Zhang XL. Synthesis, crystal structures, and antibacterial activities of Schiff base nickel(II) and cadmium(II) complexes with tridentate Schiff bases. RUSS J COORD CHEM+ 2016. [DOI: 10.1134/s107032841607006x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Huang QY, Zheng ZB, Diao YP. Synthesis, characterization and anticancer activity of a Cd(II) complex with in situ formation of (E)-1-(5-chloro-2-hydroxy-benzylideneamino)-pyrrolidin-2-one ligand. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.02.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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