2. Articole

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    Combinații coordinative ale Cuprului(II) Cu ({(2 [(piridin-2-il)metiliden]hidrazincarbotioil} amino) acetat de etil cu proprietăți antioxidative
    (CEP USM, 2024) Bîrcă, Maria; Rusnac, Anna; Garbuz, Olga; Evtodienco, Carolina; Gulea, Aurelian
    In this work, ethyl 2-isothiocyanatoacetate and [(hydrazinecarbotyoyl)amino]ethyl acetate, which are precursors of thiosemicarbazones, were synthesized.Based on these compounds, the synthesis of two new thiosemicarbazones ethyl 2-(2-(pyridin-2-ylmethylene)hydrazinecarbothioamido)acetate (Hl1) and ethyl 2-(2-(1-(pyridin-2-yl)-ethylidene)hydrazinecarbothioamide)acetate (Hl2) with yields between 85-88%. The thiosemicarbazones obtained were confrmed using 1H and 13C-nMR and FTIR spectroscopy. For the frst time, 8 coordination compounds were obtained based on thiosemicarbazone (Hl1 - Hl2) and Cu(II) salts: [Cu(l1)Br], [Cu(l1)(H2O)Cl], [Cu(l1)nO3], [Cu(l1)(H2O)ClO4], [Cu(l2)Br], [Cu(l2)(H2O)Cl], [Cu(l2)nO3], [Cu(l2)(H2O) ClO 4]. The composition of the synthesized coordination compounds was determined by elemental metal analysis and IR spectroscopy.For the synthesized compounds, the antioxidant capacity was evaluated by means of the aBTs method. In which ethyl 2-(2-(pyridin-2-ylmethylene)hydrazinecarbothioamido)acetate (Hl1) and ethyl 2-(2-(1-(pyridin-2-yl)ethylidene)hydrazinecarbothioamido)acetate (Hl2) were shown to exhibit the best results compared to the reference substance Trolox.
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    SINTEZA , PROPRIETĂŢILE FIZICO - CHIMICE, ANTIOXIDATIVE Ș I ANTITUBERCULOASE ALE COMPUȘILOR COORDINATIVI AI UNOR METALE 3D CU IZONICOTINOILHIDRAZONA 2 - HIDROXI - 3 - METOXIBENZALDEHIDA
    (CEP USM, 2020) Bîrcă, Maria; Cotovaia, Aliona; Țapcov, Victor; Garbuz, Olga; Crudu, Valeriu; Gulea, Aurelian
    În lucrare sunt prezentate sinteza și studiul proprietăţilor antituberculoase și al activității antioxidative 13 compuși coordinativi noi ai Cr3+, Mn2+, Fe3+, Co3+, Ni2+, Cu 2+, Zn2+ cu izonicotinoilhidrazona 2-hidroxi-3-metoxibenzaldehida (H2L). Ligandul (H2L) a fost obținut la condensarea hidrazidei acidului izonicotinic cu 2-hidroxi-3 -metoxibenzaldehida.Structura acestui ligand a fost stabilită folosind analiza cu raze X. Compușii sintetizați manifestă activitate antituberculoasă și antioxidativă pronunțată.
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    SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF COPPER(II), NICKEL(II), COBALT(III) AND IRON(III) COORDINATION COMPOUNDS WITH 2-HYDROXY-3-METHOXYBENZALDEHYDE N(4)-ALLYL-S-METHYLISOTHIOSEMICARBAZONE
    (CEP USM, 2018) Usataia, Irina; Graur, Vasilii; Tsapcov, Victor; Gulea, Aurelian
    The paper presents the synthesis of the 2-hydroxy-3-methoxybenzaldehyde N(4)-allyl-S-methylisothiosemicarbazone (HL) and seven coordination compounds of copper, nickel, cobalt and iron with this ligand. The new obtained compounds were studied using IR, 1H and 13C NMR spectroscopy, elemental analysis, molar electric conductibility and magnetic susceptibility. The in vitro antiproliferative activity of the HL and synthesized coordination compounds was screened on HeLa cancer cells and normal MDCK cells. The isothiosemicarbazone HL shows better anticancer activity towards HeLa cancer cells than doxorubicin that is used in medical practice and it also practically does not affect the growth and proliferation of normal cells. Moreover, it manifests high antioxidant activity towards ABTS•+ radical cation that exceeds the activity of trolox.