Article
Chemistry, Inorganic & Nuclear
Sarra Lasmari, Nevin Gurbuz, Raouf Boulcina, Namik Ozdemir, Ismail Ozdemir
Summary: A series of unsymmetrical 1,3-disubstituted benzimidazolium chlorides were synthesized as N-heterocyclic carbene precursors, which were then converted into PEPPSI-type palladium-NHC complexes. These complexes exhibited moderate to high catalytic activities in direct C(5)-arylation reactions, showing selective C-H activation at the C(5)-position of 2-acetylfuran and 2-acetylthiophene.
Article
Chemistry, Multidisciplinary
Hai-Yun Huang, Amal Benzai, Xinzhe Shi, Henri Doucet
Summary: Researchers are focused on developing different procedures for direct functionalization of two different C-H bonds of the same organic molecule, which is currently an important research topic in organic chemistry. Over the past decade, the number of tools to control regiodivergent C-H bond functionalizations has significantly increased.
Article
Chemistry, Organic
Jian Zhang, Xinzhe Shi, Henri Doucet
Summary: This study explores a Pd-catalyzed annulative pi-extension reaction of 1-arylpyrroles using 1,2-dihalobenzenes as coupling partners, leading to the selective synthesis of pyrrolo[1,2-f]phenanthridines. The higher reactivity of the pyrrole C2-H bond allows for successful access to substituted pyrrolo[1,2-f]phenanthridines.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Donia Bensalah, Lamjed Mansour, Mathieu Sauthier, Nevin Gurbuz, Ismail Ozdemir, Lotfi Beji, Rafik Gatri, Naceur Hamdi
Summary: A series of benzimidazolium salts were synthesized as asymmetric N-heterocyclic carbene (NHC) precursors, and nine novel [PdX2(NHC)(pyridine)] palladium complexes were prepared using these salts. The synthesized compounds were characterized and the catalysts showed excellent selectivity and quantitative yield for the formation of desired coupling products. The presence of electron-donating groups on the para position of aryl halides decreased the catalytic conversion, while electron-withdrawing groups increased it.
Article
Chemistry, Physical
Abd El-Krim Sandeli, Houssem Boulebd, Naima Khiri-Meribout, Saida Benzerka, Chawki Bensouici, Namik ozdemir, Nevin Gurbuz, Ismail Ozdemir
Summary: A new benzhydryl-5,6-dimethyl-(3-methylbenzyl)benzimidazolium salt as N-heterocyclic carbene precursors and their related Pd-NHC complex PEPPSI-type were synthesized and characterized using quantum chemistry computations and X-ray diffraction study. Biological activity against cholinesterase enzymes was determined, showing the effectiveness of the new Pd-NHC complex as a catalyst in direct arylation process of heteroaromatics.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Murat Kaloglu, Mehmet Hanifi Sahan, Serpil Demir Dusunceli, Ismail Ozdemir
Summary: In this study, quinoxaline-linked bis(benzimidazolium) salts were synthesized as bis-N-heterocyclic carbene (NHC) precursors, which were used as multidentate ligands for the construction of bi(hetero)aryls by palladium-catalyzed direct C-H activation process. The in situ prepared palladium complexes by mixtures of the Pd(OAc)(2) and the bis(NHC) precursors were used as the catalyst for direct C-H activation of heteroarenes, exhibiting a modest catalytic activity in the direct C-H activation of five-membered heteroarenes with a wide range of (hetero)aryl bromides.
Article
Chemistry, Applied
Kausani Ghatak, Han Vinh Huynh
Summary: A library of neutral and cationic palladium complexes of cis-chelating hetero-dicarbene ligands have been prepared and their catalytic activities have been studied. It was found that complexes containing more distinct NHC units exhibited superior catalytic performance.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Murat Kaloglu, Namik Ozdemir, Ismail Ozdemir
Summary: In this study, four novel PEPPSI-type palladium-complexes with 4,5-dihydro-imidazol-2-ylidene ligands were prepared and tested as catalysts for direct arylation reactions. The results demonstrated that these new palladium complexes are effective catalysts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Nesrin Bugday, Siraj Khan, Sedat Yasar, Ismail Ozdemir
Summary: A highly efficient protocol for the synthesis of C5-(hetero)arylated 2-isobutylthiazole derivatives has been developed, utilizing four different palladium N-heterocyclic carbene complexes as catalysts. The arylation reaction proceeded efficiently at low catalyst loading without any additives under specific conditions, leading to moderate to excellent yields of C5 arylated 2-isobutylthiazoles with a wide range of functional groups.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Chengtao Yue, Qi Xing, Peng Sun, Zelun Zhao, Hui Lv, Fuwei Li
Summary: The study successfully stabilized palladium in heterogeneous C-C bond formations by developing a novel bifunctional support catalyst, providing new experimental evidence for improving the stability of catalysts and enhancing the efficient applications of supported metal catalysts in advanced synthesis.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Di-Zhong Zheng, Dong-Hui Li, Huan Liu, Youxiang Shao, Zhuofeng Ke, Feng-Shou Liu
Summary: We developed a highly efficient direct C-H arylation method using bulky bis(imino)acenaphthene-supported N-heterocyclic carbene palladium complexes to catalyze the cross-coupling of thiophenes with (hetero)aryl bromides. By using a low palladium loading, we successfully synthesized poly(3-hexylthiophenes) with high molecular weight and high HT value. Experimental and theoretical investigations supported the involvement of a Pd(0)/Pd(II)CMD process in the reaction mechanism.
Article
Chemistry, Organic
Austin D. Marchese, Andrew G. Durant, Mark Lautens
Summary: A simple and modular approach using palladium catalysis to synthesize bis-heterocyclic spirocycles is reported. The method leverages a Mizoroki-Heck-type reaction to generate neopentylpalladium species, allowing for intramolecular C-H activation on a wide array of C-H bonds to produce a variety of spirocycles. The reaction is scalable, allowing for easy incorporation of biologically relevant heterocycles without the need for flash column chromatography.
Article
Chemistry, Multidisciplinary
Muhammad Asif Iqbal, Le Lu, Hina Mehmood, Ruimao Hua
Summary: This study reports a Cs2CO3-promoted cross-coupling reaction of arenes with cyano-/nitro-substituted aryl halides in DMSO to afford biaryls in the absence of ligands. The cyano/nitro groups in biaryls are shown to be useful for further transformations. Additionally, the formation of dibenzofurans from reactions between arenes and 1-bromo-2-iodobenzene is reported. A radical mechanism for the formation of biaryls is proposed based on control experiments and theoretical studies.
Article
Chemistry, Physical
Oznur Dogan Ulu
Summary: By preparing a series of benzimidazolium salts and their Pd-PEPPSI complexes, successful catalysis of the direct arylation of heteroaromatics with aryl bromides was achieved, yielding moderate to excellent results.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Organic
Xinzhe Shi, Jian Zhang, Thierry Roisnel, Jean-Francois Soule, Henri Doucet
Summary: The reactivity of 2-benzyl-1,2,3-triazole in palladium-catalyzed direct arylation was investigated, leading to the selective synthesis of 2-benzyl-4-aryl-1,2,3-triazoles and subsequent synthesis of 4,5-diarylated 2-benzyl-1,2,3-triazoles. This selective 4,5-diarylation was successfully applied for the synthesis of pi-extended polycyclic heteroaromatic structures phenanthro[9,10-d][1,2,3]triazoles through Pd-catalyzed C4- and C5-intermolecular arylations followed by Pd-catalyzed C-H intramolecular arylation.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Namik Ozdemir, Murat Kaloglu, Nazan Kaloglu, Nevin Gurbuz, Ismail Ozdemir
Summary: A newly synthesized organic salt and its complexes were characterized by a combination of experimental and computational methods, revealing high kinetic stability of the compounds.
INORGANIC AND NANO-METAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Murat Kaloglu, Mehmet Hanifi Sahan, Serpil Demir Dusunceli, Ismail Ozdemir
Summary: In this study, quinoxaline-linked bis(benzimidazolium) salts were synthesized as bis-N-heterocyclic carbene (NHC) precursors, which were used as multidentate ligands for the construction of bi(hetero)aryls by palladium-catalyzed direct C-H activation process. The in situ prepared palladium complexes by mixtures of the Pd(OAc)(2) and the bis(NHC) precursors were used as the catalyst for direct C-H activation of heteroarenes, exhibiting a modest catalytic activity in the direct C-H activation of five-membered heteroarenes with a wide range of (hetero)aryl bromides.
Article
Chemistry, Applied
Murat Kaloglu, Namik Ozdemir, Ismail Ozdemir
Summary: In this study, four novel PEPPSI-type palladium-complexes with 4,5-dihydro-imidazol-2-ylidene ligands were prepared and tested as catalysts for direct arylation reactions. The results demonstrated that these new palladium complexes are effective catalysts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Murat Kaloglu, Nazan Kaloglu, Selami Gunal, Ismail Ozdemir
Summary: N-Heterocyclic carbene-based silver complexes (Ag-NHCs) are widely used in medicinal and pharmaceutical chemistry research due to their low toxicity. In this study, ten Ag-NHC complexes containing benzimidazol-2-ylidene ligand were synthesized and showed effective antimicrobial activity against microorganisms, making them potential metallopharmaceutical agents.
JOURNAL OF COORDINATION CHEMISTRY
(2022)
Article
Chemistry, Medicinal
Dilek Turker, Elvan Ustun, Selami Gunal, Hatice Yildiz, Serpil D. Dusunceli, Ismail Ozdemir
Summary: New N-heterocyclic carbene precursors and silver-NHC complexes were synthesized and characterized, showing promising antibacterial activities against standard bacterial and fungal strains. The compounds were also analyzed using density functional theory (DFT)/time-dependent DFT and docking methods.
ARCHIV DER PHARMAZIE
(2022)
Article
Chemistry, Medicinal
Murat Yigit, Yeliz Demir, Duygu Barut Celepci, Tugba Taskin-Tok, Ali Arinc, Beyhan Yigit, Muhittin Aygun, Ismail Ozdemir, Ilhami Gulcin
Summary: A series of new imidazolium salts were successfully synthesized and their structures were identified using various techniques. The experimental results showed that these imidazolium salts exhibited strong inhibition abilities, which are of great significance for the treatment of Alzheimer's disease, epilepsy, glaucoma, and leukemia.
ARCHIV DER PHARMAZIE
(2022)
Article
Chemistry, Multidisciplinary
Serpil Demir Dusunceli, Mehmet Hanifi Sahan, Murat Kaloglu, Elvan Ustun, Ismail Ozdemir
Summary: In this study, a series of quinoxaline-bridged bis(benzimidazolium) salts were synthesized and their photophysical properties were investigated. The salts exhibited moderate-to-high activity in the palladium-catalyzed cross-coupling reactions.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Biochemistry & Molecular Biology
Emine O. Karaca, Zeynebe Bingol, Nevin Gurbuz, Ismail Ozdemir, Ilhami Gulcin
Summary: A series of vinyl functionalized 5,6-dimethylbenzimidazolium salts were synthesized and evaluated for their inhibition ability against various enzymes. The compounds showed effective inhibition profiles and may contribute to the development of new drugs for global disorders.
JOURNAL OF BIOCHEMICAL AND MOLECULAR TOXICOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zeyneb Belhi, Huseyin Karci, Muhammet Dundar, Nevin Gurbuz, Ilknur Ozdemir, Ahmet Koc, Abdelkrim Cheriti, Ismail Ozdemir
Summary: This study synthesized and characterized 1,3-dialkyl-5,6-dimethyl-benzimidazolium salts and their silver complexes. Four novel silver(I)-N-heterocyclic carbene complexes were synthesized and characterized. The antimicrobial and antitumor activities of the synthesized compounds were evaluated in vitro, and the results showed that silver(I)-NHC complexes exhibit antimicrobial activity and certain complexes possess broad-spectrum antimicrobial activity. The synthesized compounds were also evaluated for their anticancer properties and compared with cisplatin.
JOURNAL OF COORDINATION CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Ibrahim S. S. Al Nasr, Waleed S. S. Koko, Tariq A. A. Khan, Nevin Gurbuz, Ismail Ozdemir, Naceur Hamdi
Summary: A series of RuCl2(p-cymene)(NHC) complexes were synthesized and their structures were determined. These complexes exhibited potent enzyme inhibitory, antioxidant, antimicrobial, anticancer, and antiparasitic properties. Among them, complex 3d showed the highest inhibitory activity against AchE, excellent antimicrobial activity, and promising cytotoxic and antiparasitic activities. Further research on its mode of action and in vivo evaluation is recommended.
Article
Chemistry, Physical
Chaymae Bourhou, Hind Benouda, Reda Bellaouchi, Mohammed Merzouki, Elmehdi Fraj, Tarik Harit, Allal Challioui, Abdeslam Asehraou, Rachid Touzani, Ismail Ozdemir, Boufelja Bouammali
Summary: This study involves the synthesis of novel Bis(arylidene-2-[(tetrazol-5-yl)]alkane derivatives and their evaluation for antibacterial and antifungal activities. The compounds showed moderate yields and their structures were determined through spectroscopic analyses. In vitro testing revealed antimicrobial properties against various bacterial and fungal strains. Docking study further confirmed the interactions of the compounds with the active site in Staphylococcus aureus.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Namik Ozdemir, Funda Dogan Karabekmez, Emine Ozge Karaca, Nevin Gurbuz, Ismail Ozdemir
Summary: A new N-coordinated benzimidazole ruthenium(II) complex was successfully synthesized and fully characterized using FT-IR, 1H and 13C NMR spectroscopy. The molecular structure was confirmed through X-ray crystallography. Theoretical structure and spectroscopic data were obtained using density functional theory and compared with experimental results. The complex exhibited activity in the N-alkylation of aromatic amines with arylmethyl alcohols under neat conditions in the presence of KOBut. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Inorganic & Nuclear
Erdem Atalay Cetinkaya, Ahmet Koc, Hatice Kubra Koc, Hande Karabiyik, Hasan Karabiyik, Elvan Ustun, Ismail Ozdemir
Summary: This study synthesized six new 5,6-dimethylbenzimidazolium ligand precursors functionalized by using 2-naphthylmethyl and their silver complexes. The molecules were characterized by various spectroscopic techniques. One silver complex was found to be dimeric through X-ray crystallography analysis. Some of the synthesized compounds exhibited significant antimicrobial activity. In addition, molecular docking analysis was performed for all optimized ligands and complexes.
Article
Chemistry, Medicinal
Elvan Ustun, Neslihan Sahin, Ilknur Ozdemir, Selami Gunal, Nevin Gurbuez, Ismail Ozdemir, David Semeril
Summary: Two series of silver(I) nitrate complexes, bis(1-alkylbenzimidazole)silver(I) nitrate and bis(1-alkyl-5,6-dimethylbenzimidazole)silver(I) nitrate, were synthesized and characterized. These complexes showed moderate antimicrobial activity against both Gram-negative and Gram-positive bacteria, as well as good antifungal activity against Candida albicans and Candida glabrata. Molecular docking and reactivity descriptor calculations were also performed.
ARCHIV DER PHARMAZIE
(2023)
Article
Chemistry, Physical
Murat Kaloglu, Ismail Ozdemir
Summary: Six novel palladium N-heterocyclic carbene complexes with different ancillary ligands were successfully prepared and used as pre-catalysts in the Buchwald-Hartwig amination reaction. These complexes showed good catalytic activity in the amination of cyclic secondary amines with aryl chlorides, leading to moderate to high yields of N-arylamines under mild reaction conditions.