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    A novel series of tetrahydrothieno[2,3-c]pyridin-2-yl derivatives: fluorescence spectroscopy and BSA binding, ADMET properties, molecular docking, and DFT studies
    (Royal Soc Chemistry, 2023) Serdaroglu, Goncaguel; Uludag, Nesimi; Ustun, Elvan; Colak, Naki
    In this study, a series of substituted tetrahydrothieno[2,3-c]pyridin-2-yl (THTP) derivatives, i.e., C1-C3 and N1-N3, was synthesized in one step using 2-amino-5,5,7,7-tetramethyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carbonitrile with two different adjacent chloro- and nitro-substituted groups. Specifically, with a nitrile group on the thiophene structure, six new THTP (C1-C3 and N1-N3)-bearing electron-donating-electron-withdrawing moieties were designed with various pharmacological properties. For the first time in the literature, the synthesis of these target pharmaceutical products was carried out in less steps with high efficiency. Specifically, the notable features of this protocol are its simplicity and high reaction yields. Furthermore, spectroscopic methods were used to verify the structures of all the synthesized compounds (FT-IR, UV, H-1 NMR, and C-13 NMR). Additionally, the binding properties of the molecules with serum albumin were analyzed as a function of concentration and temperature and in the presence of Mg2+, Zn2+, and Ca2+. Moreover, molecular docking calculations were performed against bovine serum albumin, human leukemia inhibitory factor, and DNA. Also, DFT and TD-DFT computational studies were performed at the B3LYP/6-311G** level for structural and spectroscopic confirmation of compounds C1-C3 and N1-N3, and their possible reactivity features were evaluated via FMO frontier molecular orbital and NBO natural bond orbital analyses. Further, their physicochemical properties such as lipophilicity and water solubility, in addition to ADMET properties were estimated and evaluated. Considering the results obtained from the experiments and computations, it is hoped that this work will be a useful guide for future research on drug design.
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    An efficient new method of ytterbium(III) triflate catalysis approach to the synthesis of substituted pyrroles: DFT, ADMET, and molecular docking investigations
    (Elsevier Sci Ltd, 2023) Serdaroglu, Goncagul; Uludag, Nesimi; Ustun, Elvan
    In this study, the one-pot synthetic methodology for the preparation of substituted pyrroles with diethyl acetylene-dicarboxylate is reported for the various pyrrole derivatives via the Trifimow synthesis process from oximes. This method also offers the literature as a cyclization pathway using a ytterbium triflate catalyst. Another importance of this study is the use of pyrrole derivatives in pharmaceuticals, biological processes, and agrochemicals. From this point of view, the development of a new catalyst in synthetic organic chemistry and the difference in the method is also important. The syntheses of the target substituted pyrroles are accomplished in high yields. Also, all synthesized structures were confirmed by 1H NMR, 13C NMR, and IR spectra. The DFT computations were leveraged for structural and spectroscopic validation of the compounds. Then, FMO and NBO analyses were subsequently employed to elucidate the reactivity characteristics and intramolecular interactions within these compounds. Also, ADMET indices were ascertained to assess potential pharmacokinetic properties, drug-like qualities, and possible adverse effects of these compounds. Last, optimized molecules were analyzed by molecular docking methods against crystal structures of Bovine Serum Albumin and Leukemia Inhibitory Factor, and their binding affinities, interaction details, and inhibition constants were determined.
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    Green Synthesis of Pyrrole Derivatives Catalyzed by Molecular Sieves: DFT, ADMT, and Molecular Docking Investigations
    (Wiley-V C H Verlag Gmbh, 2024) Serdaroglu, Goncagul; Uludag, Nesimi; Ustun, Elvan
    A new synthetic methodology for the preparation by a different alternative method of five aryl pyrrole derivatives is produced from the corresponding ketoximes, giving diverse five-membered N-heterocycles in satisfactory yields. For the first time in literature, the synthetic catalyst molecular sieves were described. The simplicity and high response yield of this procedure are its standout qualities. Additionally, spectroscopic techniques (FT-IR, 1H NMR, 13C NMR, elemental analysis) were used to confirm the structures of all synthesized compounds. FT-IR and NMR computations with B3LYP/6-311G** level by utilizing the G09 W package were performed to compare with observed data and evaluate the structural confirmation of novel pyrrole derivatives. Then, the lipophilic characterization and water solubility were computed to enlighten the physicochemical attitude. The ADMT properties were calculated to elucidate the possible bioavailability tendencies of the compounds and the adverse behaviour in terms of both medicinal and environmental. FMO analyses were also conducted to indicate/show the reactivity tendencies and possible regions. The molecular docking analyses of the optimized molecules were performed against Bovine Serum Albumin and Leukemia Inhibitory Factor. In conclusion, this study underscores the crucial role of green chemistry principles in developing novel synthetic methodologies, using environmentally benign catalysts like zeolite 3 angstrom. Green synthesis of substituted pyrroles via molecular sieves-catalyzed coupling was performed and characterized by spectroscopic tools. The DFT, lipophilicity, water solubility, molecular dockings, and ADMT computations were utilized to evaluate physicochemical and drug-likeness properties. image