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Wyszukujesz frazę "4-oxadiazoles" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Convenient synthesis of the 2,5-di-substituted 1,3,4-oxadiazole derivatives under microwave
    Autorzy:
    Namera, D. L.
    Bhoya, U. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/412441.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted cinnamic acid
    substituted 1,3,4-oxadiazoles
    phosphoric anhydride
    Opis:
    We have reported some novel 1,3,4-oxadiazole synthesized by conventional method as well as microwave assisted method. The reaction of different substituted cinnamic acid 2a-o with 2-(4-chlorophenyl) acetohydrazide by using phosphoric anhydride as catalyst, yielded a series of 2,5-di-substituted 1,3,4-oxadiazole 6a-o. The structures of all synthesized compounds are well characterized by Mass, FT-IR, 1H NMR, 13C NMR and elemental analysis. After obtaining experimental data regarding the yield and the time taken for the synthesis by both the methods, conventional and microwave assisted method, it was proved that the microwave assisted method is convenient for synthesis of this type of 2,5-di-substituted 1,3,4-oxadiazole 6a-o.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 159-166
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microwave assisted synthesis of 2,5-distyryl-1,3,4-oxadiazole derivatives as anti microbial agents
    Autorzy:
    Namera, D. L.
    Rathod, J. B.
    Maheta, R. H.
    Bhoya, U. C.
    Powiązania:
    https://bibliotekanauki.pl/articles/411519.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted cinnamic acid
    substituted 1,3,4-oxadiazoles
    antimicrobial activity
    Opis:
    A new series of 2,5-distyryl-1,3,4-oxadiazoles derivatives have been synthesized from cinnamic hydrazide on reaction with various cinnamic acid derivatives. The structures of synthesized compounds have been elucidated by spectral studies like IR, 1HNMR, Mass and also Elemental Analysis. Furthermore, all synthesized compounds were screened for in vitro anti microbial activity against the gram positive (Staphylococcus aureus, Pseudomonas aeruginosa) and gram negative (Escherichia coli) bacterial strain. In which some the compounds show potential inhibition against the test organisms.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 10; 46-54
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and biological evaluation of 2,5-di-substituted 1,3,4-oxadiazole derivatives
    Autorzy:
    Makwana, H.
    Naliapara, Y. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/412282.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted 1,2,3,4-oxadiazoles
    phosphoric anhydride
    antimicrobial activity
    Opis:
    We have reported some novel 1,3,4-oxadiazole synthesized by conventional method .The reaction of 5-bromothiophene-2-carbohydrazide and different benzoic acid derivatives reflux in toluene using phosphorus oxychloride as a catalyst, yielded a series of 2,5-di-substituted 1,3,4-oxadiazole HM-2a to HM-2t. The newly synthesized 2,5-di-substituted 1,3,4-oxadiazole were purified by column chromatography and characterized by IR, Mass, 1H NMR, 13C NMR spectroscopy and elemental analysis. All synthesized compounds were screened for antimicrobial activity using cup plate method. All the compounds showed moderate to good antimicrobial activity and anti fungal activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 15; 48-54
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of 2-(5-bromo-2-(2,2,2-trifluoroethoxy)phenyl)-5-aryl-1,3,4-oxadiazoles and their FT-IR, NMR, Mulliken, MEP, HOMO-LUMO and NLO
    Autorzy:
    Rajalakshmi, C.
    Santhi, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1177905.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    1
    3
    4-oxadiazoles
    FT-IR
    HOMO–LUMO
    hyperpolarizability
    Opis:
    A series of novel 2-(5-bromo-2-(2,2,2-trifluoroethoxy)phenyl)-5-aryl-1,3,4-oxadiazole (3a-e) were synthesized and confirmed by spectral analyses. The optimized structure with their bonding aspects and vibrational frequencies of the same have been examined utilizing DFT-B3LYP technique with a basis set 6-31G(d,p). In the optimized structures of compounds 3a-e, the bond lengths and bond angles are in accord with their corresponding reported analogous. The vibrational frequencies resulted from experimental as well as theoretical are in well accord with each other. Furthermore, Mulliken charge and MEP analyses of the compound have been calculated in order to get insight into the compound. The quantum chemical descriptors such as HOMO and LUMO energies were used to analyze the charge transfer within the molecule. In addition, the results of polarizabilities, first order hyperpolarizabilities and dipole moment of title compounds imply that these could be utilized for the preparation of NLO crystals.
    Źródło:
    World Scientific News; 2018, 97; 80-98
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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