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    2-methyl-1,4-benzodioxan-substituted bis(NHC)PdX2 complexes: Synthesis, characterization and the catalytic activity in the direct arylation reaction of some 2-alkyl-heterocyclic compounds
    (Springer, 2019) Gok, Yetkin; Aktas, Aydin; Sari, Yakup; Erdogan, Hulya
    Almost in all fields of chemistry, the C-C cross-coupling reactions such as the direct arylation reaction have attracted much attention and have advanced quickly in recent years due to the importance of environment-friendly properties. This study contains the synthesis of the 2-methyl-1,4-benzodioxan-substituted bis(NHC)PdX2 complexes and their catalytic activity in direct arylation reaction. The bis(NHC)PdX2 complexes have been prepared from the 2-methyl-1,4-benzodioxan-substituted Ag(I)NHC complexes via transmetallation method. The bis(NHC)PdX2 complexes have been characterized using H-1 NMR, C-13 NMR, FT-IR spectroscopy and elemental analysis techniques. The bis(NHC)PdX2 complexes have been examined as catalysts in the direct arylation reactions with 2-n-butylfuran, 2-n-butylthiophene and 2-isopropylthiazole, and have demonstrated excellent activity in these reactions.
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    BIOLOGICAL ACTIVITY EVALUATION OF NOVEL N-HETEROCYCLIC CARBENE PRECURSORS
    (Int Journal Pharmaceutical Sciences & Research, 2017) Akkoc, Senem; Gok, Yetkin; Erdogan, Hulya; Albayrak, Sevil
    Five novel benzimidazolium salts were synthesized as N-heterocyclic carbene (NHC) precursors (1a-e). They were characterized by different techniques. The antimicrobial activities of these compounds were tested. The compounds showed moderate activity against three Gram (+) and seven Gram (-) bacteria in comparison to tetracycline, which was used as the standard antibiotic, whereas all the compounds (1a-e) showed no activity against the test yeast C. albicans.
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    In vitro antimicrobial studies of new benzimidazolium salts and silver N-heterocyclic carbene complexes
    (Taylor & Francis Ltd, 2016) Gok, Yetkin; Akkoc, Senem; Erdogan, Hulya; Albayrak, Sevil
    A series of new benzimidazolium salts (1a-g) were synthesized from the reaction of 1-(4-vinylbenzyl) benzimidazole with various alkyl halides. These salts were used to synthesize silver N-heterocyclic carbene (Ag-NHC) complexes (2a-f). The thirteen compounds were characterized by FT-IR, NMR (H-1 and C-13) spectroscopic methods and an elemental analysis technique. These selected candidates were tested for their in vitro antimicrobial activities. Antibacterial and antifungal results indicated that the new salts, and particularly their silver complexes, were found to be strongly effective against seven Gram (-) bacterial strains, three Gram (+) bacterial strains and one yeast (Candida albicans).
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    N-Propylphthalimide-substituted bis-(NHC)PdX2 complexes: synthesis, characterization and catalytic activity in direct arylation reactions
    (Springer, 2018) Erdogan, Hulya; Aktas, Aydin; Gok, Yetkin; Sari, Yakup
    Palladium-catalyzed direct arylation of heteroaromatics has become a popular method for producing carbon-carbon bonds via C-H bond activation. A wide diversity of heteroaromatics such as furan, thiophenes and thiazoles can be used for this reaction. This paper reports the synthesis of N-propylphthalimide-substituted bis-(NHC)PdX2 complexes (NHC = N-heterocyclic carbene), and their catalytic activity in direct arylation reactions. The complexes have been prepared from Ag(I)NHC precursors by transmetallation and characterized by spectroscopy and elemental analysis. The bis-(NHC)PdX2 complexes show excellent activity as catalysts in the direct arylation reactions of 2-n-butylfuran, 2-n-butylthiophene and 2-isopropylthiazole.
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    New 4-vinylbenzyl-substituted bis(NHC)-Pd(II) complexes: Synthesis, characterization and the catalytic activity in the direct arylation reaction
    (Elsevier Science Sa, 2018) Gok, Yetkin; Aktas, Aydin; Erdogan, Hulya; Sari, Yakup
    This study contains the synthesis of the new 4-vinylbenzyl substituted bis(NHC)-Pd(II) complexes and their catalytic activity in direct arylation reaction. The bis(NHC)-Pd(II) complexes have been prepared from Ag(I) NHC complexes by transmetallation method. The complexes have been characterized by using H-1 NMR, C-13 NMR, FTIR spectroscopy and elemental analysis techniques. Also, all the complexes showed excellent activity as catalysts in the direct arylation reaction. (C) 2017 Elsevier B.V. All rights reserved.