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    Crystal Structure, Hirshfeld Surface Analysis, In-Silico and Antimycotic Investigations of Methyl 6-methyl-4-(4-nitrophenyl)-2-oxo-1,2-dihydropyrimidine-5-carboxylate
    (Mdpi, 2023) Huseynzada, Alakbar; Mori, Matteo; Meneghetti, Fiorella; Israyilova, Aygun; Guney, Elif; Sayin, Koray; Chiarelli, Laurent R.
    Herein, we report the preparation of methyl 6-methyl-4-(4-nitrophenyl)-2-oxo-1,2-dihydropyrimidine-5-carboxylate 2, obtained by the regioselective oxidative dehydrogenation of the dihydropyrimidine derivative 1 in the presence of cerium ammonium nitrate. The structure of compound 2 was investigated by single-crystal X-ray diffraction (SC-XRD), which allowed the determination of its tautomeric form. Moreover, the presence of non-covalent interactions and their impact on the crystal structure were analyzed. To better characterize the intermolecular contacts, the Hirshfeld surface and enrichment ratio analyses were performed. Furthermore, the antimycotic activity of compounds 1 and 2 was investigated against Candida albicans, Aspergillus flavus, and Aspergillus niger, and their efficacy was compared to that of fluconazole. Computational investigations on the putative target of the compounds provided insights to explain the better activity of 2 with respect to its synthetic precursor.
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    Synthesis, crystal structure, Hirshfeld surface, computational and antibacterial studies of a 9-phenanthrenecarboxaldehyde-based thiodihydropyrimidine derivative
    (Elsevier, 2022) Huseynzada, Alakbar; Mori, Matteo; Meneghetti, Fiorella; Israyilova, Aygun; Tuzun, Gamze; Sayin, Koray; Chiarelli, Laurent R.
    We report herein the synthesis of a new biologically active 3,4-dihydropyrimidin-2(1H)-thione derivative ( 4 ) from 9-phenanthrenecarboxaldehyde, thiourea, and methyl acetoacetate by the Biginelli reaction. The structure of the synthesized compound was investigated by NMR spectroscopy, mass spectrometry, and elemental analysis. Moreover, to gain insight into the conformation and crystal packing, the structure of the novel dihydropyrimidine was also studied by single-crystal X-ray diffraction. The Hirshfeld surface and contact enrichment analyses were used to better understand the molecular interactions. Considering the biological activity of dihydropyrimidines, the antibacterial effect of the synthesized compound was evaluated against A. baumanii, E. coli, P.aeruginosa, K. pneumoniae, and S. aureus; interestingly, high activ-ity was detected against S. aureus. Additionally, computational studies were performed using the Gaussian package and the Maestro Schrodinger programs, and the theoretical IR and NMR spectra of compound 4 were examined. Finally, an ADME/T analysis was performed to estimate the drug-likeness of the com-pound.(c) 2022 Elsevier B.V. All rights reserved.