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    Wyświetlanie 1-9 z 9
    Tytuł:
    Oxidation of Substituted Chalcones by Quinaldinium Fluorochromate
    Autorzy:
    Sekar, Krishnamoorthy Guna
    Periyasamy, Seplapatty Kalimuthu
    Powiązania:
    https://bibliotekanauki.pl/articles/1191376.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chalcones
    Kinetics
    Oxidation
    Quinaldinium Fluorochromate
    Opis:
    The kinetics of oxidation of chalcones by quinaldinium fluorochromate has been studied in aqueous acetic acid medium in the presence of perchloric acid. The order of the reaction is found to be one with respect to oxidant and hydrogen ion. The order with respect to substrate is found to be fractional. The reaction rates have been determined at different temperatures and the activation parameters calculated. Electron withdrawing substituents are found to enhance the rate of the reaction and electron releasing substituents are found to retard the rate of the reaction and the rate data obeys the Hammett relationship. From the observed kinetic results a probable mechanism has been proposed.
    Źródło:
    World Scientific News; 2016, 33; 96-108
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ANTITUMOR EFFECTS OF VANILLIN BASED CHALCONE ANALOGUES IN VITRO
    Autorzy:
    Luković, Jovan
    Mitrović, Marina
    Popović, Suzana
    Milosavljević, Zoran
    Stanojević-Pirković, Marijana
    Anđelković, Marija
    Zelen, Ivanka
    Šorak, Marija
    Muškinja, Jovana
    Ratković, Zoran
    Nikolić, Ivana
    Powiązania:
    https://bibliotekanauki.pl/articles/895579.pdf
    Data publikacji:
    2020-02-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    Colorectal cancer
    apoptosis
    cytotoxicity
    Autophagy
    chalcones
    Opis:
    Chalcones, as a large group of organic compounds, are widely implemented in various types of anti-cancer therapeutics. These plant metabolites are present in fruits, vegetables, spices, and have anti-tumor, anti-inflammation, immunomodulation, antibacterial and anti-oxidative activities, as well as many other pharmacological and biological effects. The aim of the present study was to investigate cytotoxic effects, type of cell death and mechanism of action of the newly synthesized vanillin based chalcone analogues, (CH1) and (CH2) on human colon cancer HCT-116 and noncancerous (control) MRC-5 cell lines. In order to compare effects of vanillin based chalcone analogues on investigated cell lines, as reference substances cisplatin (cisPt) and dehydrozingerone (DHZ) were used. Investigation of antitumor effect of chalcone analogues on HCT-116 cells was carried out by three methods MTT assay, flow cytometry and immunofluorescence analysis. The result of our investigation indicated that newly synthesized vanillin based chalcone analogues expressed powerful antitumor effect on cancer cells (HCT-116 cell line), while their effect on healthy cells (MRC-5 cell line) was not statistically significant. Vanillin based chalcone analogues caused overexpression and activation of mitochondrial Bax protein and caspase-3 in HCT-116 cells, indicating that their mechanism of antitumor action was mediated through activation of inner apoptotic pathway. These results indicate possible usefulness of CH1 and CH2 in antitumor therapy whether through its direct cytotoxic effect or as adjuvant therapy. Our results indicate possible usefulness of CH1 and CH2 vanillin based chalcone analogues in antitumor therapy.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 57-67
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cu2+/Zeolite catalyzed synthesis and evaluation of antimicrobial activities of some chalcones
    Autorzy:
    Thirunarayanan, G.
    Kumar, N. Dinesh
    Powiązania:
    https://bibliotekanauki.pl/articles/1179609.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial activities
    Aryl chalcones
    Cu2+/Zeolite
    IR and NMR spectra
    Opis:
    Some aryl chalcones have been synthesized by Cu2+/Zeolite catalyzed aldol condensation of aryl methyl ketones and substituted benzaldehydes under microwave irradiation conditions. The yields of the synthesized chalcones are more than 85%. These chalcones were characterized by their physical constants and spectroscopic data. The antimicrobial activities of synthesized chalcones were studied by Bauer-Kirby disc diffusion method.
    Źródło:
    World Scientific News; 2017, 74; 251-266
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral correlations in some substituted styryl (E)-4-((2-oxopropyl) diazenyl) benzoic acids
    Autorzy:
    Sathiyendiran, V.
    Sekar, K. G.
    Thirunarayanan, G.
    Arulkumaran, R.
    Sundararajan, R.
    Kamalakkannan, D.
    Suresh, R.
    Manikanadan, V.
    Vijayakumar, R.
    Vanangamudi, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412199.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Oxo-propyl diazenyl benzoic acid chalcones
    IR spectra
    NMR spectra
    Hammett equation
    Regression analysis
    Opis:
    A series of titled compounds were prepared and analyzed their purities by literature method. The infrared and NMR spectral group frequencies of the compounds were assigned and correlated with Hammett substituent constants, F and R constants using single and multi linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral frequencies was discussed.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 33-43
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and thermal decomposition kinetics of some pyrazolo-quinazoline derivatives
    Autorzy:
    Baluja, Shipra
    Nandha, Kajal
    Powiązania:
    https://bibliotekanauki.pl/articles/1193006.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Pyrazolo-quinazolines
    chalcones
    differential scanning calorimetry
    kinetic parameters
    thermal gravimetric analysis
    thermal stability
    Opis:
    Some new pyrazolo-quinazolines have been synthesized and characterization of the synthesized was done by IR, NMR and mass spectral data. The thermal properties of some synthesized compounds were studied by TGA and DSC methods. From the thermo grams, thermal stability and some kinetic parameters such as energy of activation, frequency factor, order of reaction and entropy of activation were evaluated. It is observed that for all the studied compounds, degradation is single step process. Thermal stability varies slightly according to the nature and position of the substitutions present in the studied compounds.
    Źródło:
    World Scientific News; 2016, 31; 100-110
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aryl Chalcones as Efficient Precursors for Deriving Oxazine: Solvent-free Synthesis and Antimicrobial Activities of some Oxazine-2-amines
    Autorzy:
    Thirunarayanan, G.
    Sundararajan, R.
    Arulkumaran, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/411627.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Oxazine amines
    Chalcones
    fly-ash
    H2SO4
    Environmentally benign reaction
    antimicrobial activities
    Opis:
    A series of some oxazine derivatives has been synthesised by fly-ash:H2SO4 catalyzed solvent-free cyclization of aryl chalcones and urea under microwave irradiation. The yields of the oxazines were more than 85 %. The synthesised oxazines were characterized by their physical constants, analytical and spectroscopic data. The antimicrobial activities of these oxazines have been studied using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 4; 82-97
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, and spectral Hammett correlation analysis of some (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds
    Autorzy:
    Balaji, S.
    Vijayakumar, R.
    Manikandan, V.
    Senbagam, R.
    Rajarajan, M.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182925.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    (e)-5-chloro-2-hydroxyphenyl chalcones
    synthesis
    uv
    ir and nmr spectra
    hammett correlation analysis
    substituent effect
    Opis:
    A series of substituted of (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds by cross-aldol condensation reaction of 5-chloro-2-hydroxy acetophenone with various substituted benzaldehyde in the presence sodium hydroxide (base). The synthesized substituted (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds was characterized by physical constants, UV, FT-IR, 1H & 13C-NMR spectral data. All the spectral data of substituted (E)-1-(5-chloro-2-hydroxyphenyl)-3-phenylprop-2-en-1-one compounds has been Hammett correlation with linear regression analyses.
    Źródło:
    World Scientific News; 2016, 49, 2; 144-161
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrochemical reduction potential correlation of some insect antifeedant potent 2-phenothiazinyl chalcones
    Autorzy:
    Ranganathan, K.
    Suresh, R.
    Kamalakkannan, D.
    Arulkumaran, R.
    Sundararajan, R.
    Sakthinathan, S. P.
    Vijayakumar, S.
    Thirumurthy, K.
    Mayavel, P.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/411842.pdf
    Data publikacji:
    2012
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    elektrochemia
    potencjał redukcji
    analiza korelacji
    2-phenothiazenyl
    chalkony
    2-Phenothiazenyl chalcones
    electrochemistry
    reduction potential
    correlation analysis
    insect antifeedant activities
    Opis:
    A series containing twelve substituted styryl 2-phenothiazenyl ketones have been synthesized. The electrochemical potentials of carbonyl and vinyl groups were measured. These potentials are correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effects of substituent on the group reduction potentials have been discussed. The insect antifeedant activities of these chalcones have been studied using 4th instar larvae Achoea Janata L with castor leaf discs.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2012, 4; 66-75
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of substituent effects and antimicrobial activities of some 2ʹ,5ʹ-dimethyl phenyl chalcones
    Autorzy:
    Joseph, S. J.
    Kamalakkannan, D.
    Arulkumaran, R.
    Sakthinathan, S. P.
    Suresh, R.
    Sundararajan, R.
    Vijayakumar, S.
    Ranganathan, K.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412597.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 2
    5ʹ-dimethyl phenyl chalcones
    UV spectra
    IR spectra
    NMR spectra
    substituent effects
    antimicrobial activities
    Opis:
    Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93 %. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 5; 99-123
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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