Browsing by Author "Paholnițcaia, Anastasia"

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    CRYSTAL STRUCTURES OF NITRATO-{2-[2-(1-PYRIDINE-2-YLETHYLIDENE)HYDRAZINE]-1,3-BENZOTHIAZOLO}AQUACOPPER AND CHLORO-{2-[2-PHENYL(PYRIDINE-2-YLETHYLIDENE)HYDRAZINE]-1,3-BENZOTHIAZOLO}COPPER
    (2015) Ciumacov, Iurie; Paholnițcaia, Anastasia; Petrenko, Peter A.; Țapcov, Victor; Poirier, Donald; Gulea, Aurelian
    Two crystal modifications of nitrato-{2-[2-(1-pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazolo}aquacopper (I and II) and two modifications of chloro-{2-[2-phenyl(pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazolo}copper (III and IV) have been synthesized and studied by X-ray diffraction. In structures I and II, the copper atoms coordinate a monodeprotonated molecule of the organic ligand, nitrate ions, and a water molecule. In crystals of I, the complexes are monomeric, whereas complexes II are linked via nitrate ions to form polymeric chains. In both structures the coordination polyhedron of the copper atom can be described as a distorted tetragonal bipyramid—(4 + 1 + 1) in I and (4 + 2) in II. These coordination polyherdra have different compositions. In structures III and IV, the metal atoms coordinate a monodeprotonated {2-[2-phenyl(pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazole molecule and chloride ions. In III the complex-forming ion has square-planar coordination geometry, whereas structure IV consists of centrosymmetric dimers with two bridging chlorine atoms. It was found that nitrato-{2-[2-(1-pyridine-2-ylethylidene)hydrazine]-1,3-benzothiazolo}aquacopper possesses antitumor activity.
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    SYNTHESIS, STRUCTURE AND IN VITRO ANTIPROLIFERATIVE ACTIVITY OF SOME HYDRAZONES AND THEIR COPPER COMPLEXES
    (2013) Gulea, Aurelian; Paholnițcaia, Anastasia; Barba, Alic; Poirier, Donald
    Lucrarea conţine date despre sinteza, caracterizarea şi evaluarea in vitro a activităţii biologice a hidrazonelor în baza 2-hidrazinobenzotiazolului şi a 4 compuşi complecşi obţinuţi în baza 2-[2-(Piridin-2-ilmetilene)hidrazinil]-benzo[d]tiazolului şi 2-[2-(1-Piridin-2-il) etilidene)hidrazinil] benzo[d] tiazolului dihidrat. Compoziţia compuşilor sintetizaţi a fost determinată cu ajutorul spectroscopiei 1H, 13C RMN. Toţi compuşii obţinuţi au fost testaţi ca inhibitori ai proliferării celulelor de leucemie umană HL-60. A fost stabilit că hidrazonele în baza 2-piridin aldehidei, aldehidei salicilice şi compuşii complecşi ai cuprului în baza 2-[2-(Piridin-2-ilmetilene)hidrazinil]-benzo [d]tiazolului şi 2-[2-(1-Piridin-2-il)etilidene)hidrazinil]benzo[d]tiazolului dihidrat sunt cei mai activi agenţi antiproliferativi obţinuţi în acest studiu. Unii din compuşi au fost testaţi ca inhibitori de proliferare a celulelor HepG2, MCF-7 şi LNCaP. Au fost calculate constantele de stabilitate a compuşilor complecși în baza 2-[2-(Piridin-2-ilmetilene)hidrazinil]-benzo[d] tiazolului şi 2-[2-(1-Piridin-2-il)etilidene)hidrazinil]benzo[d]tiazolului dihidrat.