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    Half-sandwich Ru(II) arene complexes bearing benzimidazole ligands for the N-alkylation reaction of aniline with alcohols in a solvent-free medium
    (Royal Soc Chemistry, 2021) Cicek, Metin; Gurbuz, Nevin; Ozdemir, Namik; Ozdemir, Ismail; Ispir, Esin
    In this article, the direct N-alkylation reactions of amines with alcohol derivatives using the borrowing hydrogen methodology have been investigated. For this purpose, a new series of half-sandwich ruthenium(II) complexes bearing N-coordinated benzimidazole complexes have been synthesized and fully characterized by FT-IR, H-1 NMR and C-13 NMR spectroscopies. Additionally, the structures of the complexes 2a-2e have been characterized by X-ray crystallography. ALL new complexes were investigated for their catalytic activities in the alkylation reaction of amines with alcohol derivatives. It was found that alkylation reactions in a solvent-free medium are efficient and selective.
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    N-alkylbenzimidazolepalladium(II) complexes: Synthesis and their catalytic activities in direct C-H functionalization of pyrrole, furan and 2-acetylthiophene
    (Elsevier Science Sa, 2024) Cicek, Metin; Ispir, Esin; Ozdemir, Namik; Gurbuz, Nevin; Ozdemir, Ismail
    Herein, we reported the synthesis of six new palladium complexes ( 2a-2f ) containing benzimidazole core and examined their catalytic activities in the direct arylation of heteroaromatic species with aryl bromides. For this purpose, a new series of palladium(II) complexes bearing N-coordinated benzimidazole complexes have been synthesized and fully characterized by elemental analysis, FT-IR, 1 H NMR and 13 C NMR spectroscopies. Additionally, the structures of the complexes 2a- 2e have been characterized by X-ray crystallography. Further, direct arylation reactions, using KOAc as base and DMAc as solvent under inert conditions, were carried out with the synthesized complexes in the presence of various aryl bromides, and 1-methylpyrrole-2-carboxaldehyde, furfuryl acetate, 2-acetylfuran and 2-acetylthiophene. Moreover, moderate to high yields were obtained in the direct arylation of heteroarenes and aryl bromides under 1 % mol catalyst loading conditions.