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    N-Heterocyclic carbene-palladium catalysts for the direct arylation of pyrrole derivatives with aryl chlorides
    (Beilstein-Institut, 2013) Ozdemir, Ismail; Gurbuz, Nevin; Kaloglu, Nazan; Dogan, Oznur; Kaloglu, Murat; Bruneau, Christian; Doucet, Henri
    New Pd-NHC complexes have been synthesized and employed for palladium-catalyzed direct arylation of pyrrole derivatives by using electron-deficient aryl chlorides as coupling partners. The desired coupling products were obtained in moderate to good yields by using 1 mol % of these air-stable palladium complexes. This is an advantage compared to the procedures employing air-sensitive phosphines, which have been previously shown to promote the coupling of aryl chlorides with heteroarenes.
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    New Functionalized N-Heterocyclic Carbene Ligands for Arylation of Benzaldehydes
    (Wiley, 2009) Dogan, Oznur; Gurbuz, Nevin; Ozdemir, Ismail; Cetinkaya, Bekir
    Novel functionalized 1,3-dialkylimidazolinium salts (LHCl) as NHC precursors have been prepared and successfully applied in palladium-catalyzed arylation of benzaldehydes. The ortho position of aromatic aldehydes was directly and selectively arylated with aryl chlorides in the presence of a catalytic system prepared in situ from Pd(OAC)(2), 1,3-dialkylimidazolinium chlorides (2a-c), and CS2CO3.
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    Palladium N-heterocyclic-carbene-catalyzed ortho-arylation of benzaldehyde derivatives
    (Wiley-Hindawi, 2008) Dogan, Oznur; Gurbuz, Nevin; Ozdemir, Ismail; Cetinkaya, Bekir
    New, sterically demanding 1,3-dialkylbenzimidazolium salts (2a-c) as N-heterocyclic-carbene precursors have been synthesized and characterized. The ortho position of aromatic aldehydes was directly and selectively arylated with aryl chlorides in the presence of a catalytic system prepared in situ from Pd(OAc)(2), 1,3-dialkylbenzimidazolium chlorides (2a-c), and Cs2CO3. (C) 2008 Wiley Periodicals, Inc.
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    Palladium(II)-NHC complexes containing benzimidazole ligand as a catalyst for C-N bond formation
    (Wiley, 2011) Dogan, Oznur; Demir, Serpil; Ozdemir, Ismail; Cetinkaya, Bekir
    The reaction of 2-(2-bromoethyl)-1,3-dioxane with 1-alkylbenzimidazole derivatives results in the formation of the new benzimidazoliumsalts (1). The reaction of Pd(OAc)(2) with1,3-dialkylbenzimidazoliumsalts(1a-c) yields palladium N-heterocyclic carbene (NHC) complexes (2a-c). All synthesized compounds were characterized by (HNMR)-H-1, (CNMR)-C-13, IR and elemental analysis techniques which support the proposed structures. As catalysts, these new palladium complexes offer a simple and efficient methodology for the synthesis of triarylamines and secondary amines from anilines and amines and in a single step with potassium tertiary butoxide as a base. Copyright (C) 2010 John Wiley & Sons, Ltd.
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    Ruthenium N-heterocyclic-carbene catalyzed diarylation of arene C-H bond
    (Wiley, 2008) Yasar, Sedat; Dogan, Oznur; Ozdemir, Ismail; Cetinkaya, Bekir
    Novel ruthenium-1,3-dialkylimidazolin-2-ylidene complexes (2a-e) have been prepared and characterized by C, H, N analysis, H-1-NMR and C-13-NMR. The ortho position of the aromatic ring of pyridyl group substituted aromatic compound was directly arylated with aryl bromides and chlorides in the presence of a catalytic amount of [RuCl2(1,3-dialkylimidazolin-2-ylidene)] complexes. Copyright (C) 2008 John Wiley & Sons, Ltd.
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    Synthesis and antimicrobial activity of Ag(I)-N-heterocyclic carbene complexes derived from benzimidazol-2-ylidene
    (Wiley, 2010) Ozdemir, Ilknur; Gurbuz, Nevin; Dogan, Oznur; Gunal, Selami; Ozdemir, Ismail
    Novel benzimidazol-2-ylidene carbene complexes of Ag(I) were prepared by interaction of the corresponding benzimidazolium salt with Ag2O in dichloromethane. Their structures were characterized by elemental analyses, H-1-NMR, C-13-NMR and IR spectroscopy techniques. All compounds studied in this work were screened for their in vitro antimicrobial activities against the standard strains: Enterococcus faecalis (ATCC 29212), Staphylococcus aureus (ATCC 29213), Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853) and the fungi Candida albicans and Candida tropicalis. The new complexes were found to be effective antimicrobial activity against a series of bacteria and fungi. Copyright (C) 2010 John Wiley & Sons, Ltd.
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    Synthesis and antimicrobial activity of novel gold(I) N-heterocyclic carbene complexes
    (Springer Wien, 2013) Dogan, Oznur; Kaloglu, Nazan; Demir, Serpil; Ozdemir, Ilknur; Gunal, Selami; Ozdemir, Ismail
    Benzimidazolium salts and six anionic gold-NHC complexes (NHC = N,N'-dialkylbenzimidazol-2-ylidene) were prepared and characterized. Novel [Au(NHC)(2)]AuCl2-type complexes were prepared in good yields from silver-NHC complexes by treatment with [AuCl(PPh3)], following the commonly used silver carbene transfer route. All compounds were characterized using H-1 and C-13 NMR spectroscopy, elemental analysis, and IR. The gold complexes showed antimicrobial activity against Gram-positive/negative and fungal strains.
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    Synthesis, characterization and catalytic activity of novel N-heterocyclic carbene-palladium complexes
    (Royal Soc Chemistry, 2009) Dogan, Oznur; Gurbuz, Nevin; Ozdemir, Ismail; Cetinkaya, Bekir; Sahin, Onur; Buyukgungor, Orhan
    The reaction of Pd(OAc)(2) with 1-(benzhydryl)-3-(alkyl) benzimidazolium salts 1a-d yields trans-bis[1-(benzhydryl)-3-(alkyl)benzimidazolin-2-ylidene]dibromopalladium(II) complexes (2a-d) which were characterized by elemental analysis, NMR spectroscopy and the molecular structures of 2b, and 2d were determined by X-ray crystallography. The catalytic activity of PdBr(2)bis(benzimidazolin-2- ylidene) complexes 2a-d was evaluated in the direct arylation reaction of benzothiazole with bromobenzene derivatives.