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Kowalik M, Nowicka P, Brzeski J, Żukowska N, Masternak J, Kazimierczuk K, Makowski M. Exploring novel Cd(II) complexes with 5-methyl-4-imidazolecarboxaldehyde: synthesis, structure, computational insights, and affinity to DNA through switchSense methodology. Dalton Trans 2024; 53:10347-10360. [PMID: 38836789 DOI: 10.1039/d4dt00879k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
A series of four Cd(II) complexes with 5-methyl-4-imidazolecarboxaldehyde (L) with different inorganic anions within or outside the coordination sphere of general formula: [CdCl2L2] (1), [CdBr2L2] (2), [CdI2L2] (3), and [CdL4](PF6)2·3H2O (4) was synthesized through one-step and two-step reactions, respectively. All complexes were obtained as colorless crystals without the need for recrystallization and exhibited solubility in aqueous solutions. Structural analysis revealed different coordination environments for each complex, with variations in bond lengths and angles. The crystal packing of the complexes was stabilized by hydrogen bonding and π-π stacking interactions. FT-IR analysis indicated coordination of the ligand to the metal ion, and UV-Vis studies confirmed the stability of the complexes in solution. Computational analysis has revealed the polar nature of the complexes and their favorable stability constants. Affinity studies with DNA using the switchSense technique demonstrated rapid association and dissociation processes for all complexes, with temperature-dependent binding constants. Thermodynamic analysis suggested spontaneous with positive entropy change and endothermic formation processes for the complexes. Overall, the study underscores the synthesis, examination, and interaction with DNA of Cd(II) complexes, demonstrating their promise within medicinal chemistry.
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Affiliation(s)
- Mateusz Kowalik
- Faculty of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland.
| | - Paulina Nowicka
- Faculty of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland.
| | - Jakub Brzeski
- Faculty of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland.
| | - Natalia Żukowska
- Faculty of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland.
| | - Joanna Masternak
- Institute of Chemistry, Jan Kochanowski University in Kielce, 25-406 Kielce, Poland
| | | | - Mariusz Makowski
- Faculty of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland.
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2
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Wei X, Huang Y, Karimi Z, Qu J, Wang B. DMAP-Catalyzed [4+3] Spiroannulation of Pyrazolone-Derived Morita-Baylis-Hillman Carbonates with N-( o-Chloromethyl)aryl Amides to Forge Spiro[pyrazolone-azepine] Scaffolds. J Org Chem 2023. [PMID: 37389982 DOI: 10.1021/acs.joc.3c00262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
A novel DMAP-catalyzed [4+3] spiroannulation of pyrazolone-derived Morita-Baylis-Hillman carbonates with N-(o-chloromethyl)aryl amides was developed. This reaction led to the assembly of medicinally relevant pyrazolone and azepine nuclei into a structurally new spirocyclic scaffold, and a diverse array of spiro[pyrazolone-azepine] products were afforded in good to excellent yields (up to 93%) with a wide substrate scope (23 examples) under mild conditions. Moreover, a gram-scale reaction and product transformations were conducted, which further increased the diversity of products.
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Affiliation(s)
- Xingfu Wei
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yue Huang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zahra Karimi
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- Ningbo Institute of Dalian University of Technology, Ningbo 315016, P. R. China
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3
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Anjomshoa M, Sahihi M, Fatemi SJ, Shayegan S, Farsinejad A, Amirheidari B. In vitro biological and in silico molecular docking and ADME studies of a substituted triazine-coordinated cadmium(II) ion: efficient cytotoxicity, apoptosis, genotoxicity, and nuclease-like activity plus binding affinity towards apoptosis-related proteins. Biometals 2022; 35:549-572. [PMID: 35366135 DOI: 10.1007/s10534-022-00387-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 03/07/2022] [Indexed: 12/24/2022]
Abstract
A cadmium(II) complex containing dppt ligand with the formula [CdCl2(dppt)2], where dppt is 5,6-diphenyl-3-(2-pyridyl)-1,2,4-triazine was synthesized, elucidated and submitted to in vitro cytotoxicity studies against human breast (MCF-7), glioblastoma (U-87), and lung (A549) cancer cell lines as well as mouse embryo normal cell line (NIH/3T3), in comparison with cisplatin employing MTT assay over 24 and 48 h. The complex exhibited the highest cytotoxic effect against MCF-7 cells among the other three cell lines with IC50 values of 8.7 ± 0.5 (24 h) and 1.2 ± 0.7 µM (48 h). Significantly, flow cytometric assessment of the complex-treated MCF-7 and U-87 cells demonstrated a dose-dependent induced apoptotic cell death. The cellular morphological changes were in concord with cytotoxicity and flow cytometric results. The results of comet assay showed that the complex is able to induce DNA damage in MCF-7 cells. These observations are of importance, as sustained damage to cellular DNA could lead to apoptotic cell death. The results of DNA-binding studies indicated that the complex fits into the DNA minor groove and interacts with DNA via a partial intercalation. Moreover, the complex was able to efficiently cleave pUC19 DNA through a hydrolytic mechanism. The binding affinity between the complex and apoptosis-relevant protein targets including APAF1, Bax, Bcl-2, Cas3, Cas7, and Cas9 was evaluated through molecular docking studies. In silico virtual studies revealed the complex's strong affinity towards apoptosis-related proteins; therefore the complex can act as a potential apoptosis inducer. Physicochemical, pharmacokinetics, lipophilicity, drug-likeness, and medicinal chemistry properties of the complex were also predicted through in silico absorption, distribution, metabolism and excretion studies.
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Affiliation(s)
- Marzieh Anjomshoa
- Pharmaceutical Sciences and Cosmetic Products Research Center, Kerman University of Medical Sciences, Kerman, Iran.
| | - Mehdi Sahihi
- Roberval Laboratory, Université de Technologie de Compiègne, Alliance Sorbonne Université, Compiègne, France
| | | | - Shika Shayegan
- Department of Pharmacy, Eastern Mediterranean University, TRNC via Mersin 10, Famagusta, Turkey
| | - Alireza Farsinejad
- Cell Therapy and Regenerative Medicine Comprehensive Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Bagher Amirheidari
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran. .,Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Kerman University of Medical Sciences, Kerman, Iran.
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4
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Nano cadmium(II)-benzyl benzothiazol-2-ylcarbamodithioate complexes: Synthesis, characterization, anti-cancer and antibacterial studies. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2021.109110] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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5
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Fouad R, Shaaban IA, Ali TE, Assiri MA, Shenouda SS. Co(ii), Ni(ii), Cu(ii) and Cd(ii)-thiocarbonohydrazone complexes: spectroscopic, DFT, thermal, and electrical conductivity studies. RSC Adv 2021; 11:37726-37743. [PMID: 35498107 PMCID: PMC9043744 DOI: 10.1039/d1ra06902k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/27/2021] [Indexed: 11/21/2022] Open
Abstract
New and stable coordinated compounds have been isolated in a good yield. The chelates have been prepared by mixing Co(ii), Ni(ii), Cu(ii), and Cd(ii) metal ions with (1E)-1-((6-methyl-4-oxo-4H-chromen-3-yl)methylene)thiocarbonohydrazide (MCMT) in 2 : 1 stoichiometry (MCMT : M2+). Various techniques, including elemental microanalyses, molar conductance, thermal studies, FT-IR, 1H-NMR, UV-Vis, and XRD spectral analyses, magnetic moment measurements, and electrical conductivity, were applied for the structural and spectroscopic elucidation of the coordinating compounds. Further, computational studies using the DFT-B3LYP method were reported for MCMT and its metal complexes. MCMT behaves as a neutral NS bidentate moiety that forms octahedral complexes with general formula [M(MCMT)2Cl(OH2)]Cl·XH2O (M = Cu2+; (X = ½), Ni2+, Co2+; (X = 1)); [Cd(MCMT)2Cl2]·½H2O. There is good confirmation between experimental infrared spectral data and theoretical DFT-B3LYP computational outcomes where MCMT acts as a five-membered chelate bonded to the metal ion through azomethine nitrogen and thiocarbonyl sulphur donors. The thermal analysis is studied to confirm the elucidated structure of the complexes. Also, the kinetic and thermodynamic parameters of the thermal decomposition steps were evaluated. The measured optical band gap values of the prepared compounds exhibited semiconducting nature. AC conductivity and dielectric properties of the ligand and its complexes were examined, which showed that Cu(ii) complex has the highest dielectric constant referring to its high polarization and storage ability.
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Affiliation(s)
- R Fouad
- Department of Chemistry, Faculty of Education, Ain Shams University Roxy Cairo Egypt +20 22581243 +201000212207
| | - Ibrahim A Shaaban
- Department of Chemistry, Faculty of Science, King Khalid University P. O. Box 9004 Abha 61321 Saudi Arabia.,Department of Chemistry, Faculty of Science (Men's Campus), Al-Azhar University Nasr City 11884 Cairo Egypt
| | - Tarik E Ali
- Department of Chemistry, Faculty of Science, King Khalid University P. O. Box 9004 Abha 61321 Saudi Arabia.,Department of Chemistry, Faculty of Education, Ain Shams University Roxy Cairo Egypt +20 22581243 +201000212207
| | - Mohammed A Assiri
- Department of Chemistry, Faculty of Science, King Khalid University P. O. Box 9004 Abha 61321 Saudi Arabia
| | - S S Shenouda
- Physics Department, Faculty of Education, Ain Shams University Roxy Cairo Egypt
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Shaikh I, Jadeja R, Patel R, Mevada V, Gupta VK. 4-Acylhydrazone-5-Pyrazolones and their Zinc(II) Metal Complexes: Synthesis, Characterization, Crystal Feature and Antimalarial Activity. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130051] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Nurmamat M, Yan H, Wang R, Zhao H, Li Y, Wang X, Nurmaimaiti K, Kurmanjiang T, Luo D, Baodi J, Xu G, Li J. Novel Copper(II) Complex with a 4-Acylpyrazolone Derivative and Coligand Induce Apoptosis in Liver Cancer Cells. ACS Med Chem Lett 2021; 12:467-476. [PMID: 33738074 DOI: 10.1021/acsmedchemlett.0c00680] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 02/22/2021] [Indexed: 12/13/2022] Open
Abstract
A novel pyrazolone-based copper complex [CuL(phen)(CH3OH)][CuL(phen)]·CH3CH2OH·CH3OH (P-FAH-Cu-phen) was synthesized and characterized. The asymmetric structural unit of P-FAH-Cu-phen was composed of two independent complex units [CuL(phen)(CH3OH)] and [CuL(phen)]:Cu12+ center with six coordination mode and Cu22+ center with five coordination mode. The growth of BEL-7404 cells and H22 cells was significantly inhibited by P-FAH-Cu-phen with IC50 values of 1.175 μg/mL and 1.097 μg/mL, respectively, which were much lower than IC50 of cisplatin for BEL-7404 cells (23.32 μg/mL) and H22 cells (27.5 μg/mL). P-FAH-Cu-phen induced cell cycle arrest at G2/M and apoptosis in BEL-7404 cells through mitochondria- and endoplasmic reticulum stress-associated pathways. Moreover, P-FAH-Cu-phen significantly suppressed the migration of BEL-7404 cells and the tumor growth in H22 tumor mouse model without severe side effects and improved the survival of tumor mice. The results suggested that P-FAH-Cu-phen might be a potential drug candidate for the treatment of live cancer.
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Affiliation(s)
- Marhaba Nurmamat
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Haili Yan
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Ru Wang
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Huixin Zhao
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Yanhong Li
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Xiaojing Wang
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | | | | | - Difang Luo
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Jumagul Baodi
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
| | - Guancheng Xu
- Institute of Applied Chemistry, College of Chemistry, Xinjiang University, Urumqi 830046, China
| | - Jinyu Li
- College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China
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8
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Three mixed ligand mononuclear Zn(II) complexes of 4-acyl pyrazolones: Synthesis, characterization, crystal study and anti-malarial activity. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114528] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Marchetti F, Pettinari C, Di Nicola C, Tombesi A, Pettinari R. Coordination chemistry of pyrazolone-based ligands and applications of their metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213069] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Shaikh IU, Patel RK, Mevada VA, Gupta VK, Jadeja RN. Binary and Ternary Zinc(II) Complexes of Acyl Pyrazolones: Synthesis, Spectroscopic Analysis, Crystal Structure and Antimalarial Activity. ChemistrySelect 2019. [DOI: 10.1002/slct.201901058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Irfan U. Shaikh
- Department of ChemistryFaculty of ScienceThe M.S. University of Baroda, Vadodara 390 002 India
| | - Rajesh K. Patel
- Department of BioscienceVeer Narmad South Gujarat University Surat- 395007 India
| | - Vishal A. Mevada
- Super Computing FacilityVeer Narmad South Gujarat University Surat- 395007 India
| | - Vivek K. Gupta
- Post-Graduate Department of Physics & ElectronicsUniversity of Jammu Jammu Tawi 180 006 India
| | - Rajendrasinh N. Jadeja
- Department of ChemistryFaculty of ScienceThe M.S. University of Baroda, Vadodara 390 002 India
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11
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Zhang YP, Li Y, Xu GC, Li JY, Luo HY, Li JY, Zhang L, Jia DZ. Synthesis, crystal structure, DNA/bovine serum albumin binding and antitumor activity of two transition metal complexes with 4-acylpyrazolone derivative. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4668] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yan-Ping Zhang
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
| | - Yue Li
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
| | - Guan-Cheng Xu
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
| | - Jin-Yu Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology; Xinjiang University; Urumqi 830046 Xinjiang China
| | - Hua-Ying Luo
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
| | - Jin-Yao Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology; Xinjiang University; Urumqi 830046 Xinjiang China
| | - Li Zhang
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
| | - Dian-Zeng Jia
- Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region; Institute of Applied Chemistry, Xinjiang University; Urumqi 830046 Xinjiang China
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12
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Wang J, Xu GC, Zhang YP, Luo HY, Li JY, Zhang L, Jia DZ. Copper(ii) complexes with 4-acyl pyrazolone derivatives and diimine coligands: synthesis, structural characterization, DNA binding and antitumor activity. NEW J CHEM 2019. [DOI: 10.1039/c8nj02695e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three copper complexes of 4-acyl pyrazolone derivatives were constructed. Their DNA binding and cancer cell inhibitory activities were investigated.
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Affiliation(s)
- Jun Wang
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Guan-Cheng Xu
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Yan-Ping Zhang
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Hua-Ying Luo
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Jin-Yao Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering
- College of Life Science and Technology
- Xinjiang University
- Urumqi
- P. R. China
| | - Li Zhang
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
| | - Dian-Zeng Jia
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
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13
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Bjelogrlić S, Todorović TR, Cvijetić I, Rodić MV, Vujčić M, Marković S, Araškov J, Janović B, Emhemmed F, Muller CD, Filipović NR. A novel binuclear hydrazone-based Cd(II) complex is a strong pro-apoptotic inducer with significant activity against 2D and 3D pancreatic cancer stem cells. J Inorg Biochem 2018; 190:45-66. [PMID: 30352315 DOI: 10.1016/j.jinorgbio.2018.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/16/2018] [Accepted: 10/03/2018] [Indexed: 11/29/2022]
Abstract
A novel binuclear Cd complex (1) with hydrazone-based ligand was prepared and characterized by spectroscopy and single crystal X-ray diffraction techniques. Complex 1 reveals a strong pro-apoptotic activity in both human, mammary adenocarcinoma cells (MCF-7) and pancreatic AsPC-1 cancer stem cells (CSCs). While apoptosis undergoes mostly caspase-independent, 1 stimulates the activation of intrinsic pathway with noteworthy down regulation of caspase-8 activity in respect to non-treated controls. Distribution of cells over mitotic division indicates that 1 caused DNA damage in both cell lines, which is confirmed in DNA interaction studies. Compared to 1, cisplatin (CDDP) does not achieve cell death in 2D cultured AsPC-1 cells, while induces different pattern of cell cycle changes and caspase activation in 2D cultured MCF-7 cells, implying that these two compounds do not share similar mechanism of action. Additionally, 1 acts as a powerful inducer of mitochondrial superoxide production with dissipated trans-membrane potential in the majority of the treated cells already after 6 h of incubation. On 3D tumors, 1 displays a superior activity against CSC model, and at 100 μM induces disintegration of spheroids within 2 days of incubation. Fluorescence spectroscopy, along with molecular docking show that compound 1 binds to the minor groove of DNA. Compound 1 binds to the human serum albumin (HSA) showing that the HSA can effectively transport and store 1 in the human body. Thus, our current study strongly supports further investigations on antitumor activity of 1 as a drug candidate for the treatment of highly resistant pancreatic cancer.
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Affiliation(s)
- Snežana Bjelogrlić
- National Cancer Research Center of Serbia, Pasterova 14, Belgrade, Serbia; Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Tamara R Todorović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Ilija Cvijetić
- Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Marko V Rodić
- Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Miroslava Vujčić
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Sanja Marković
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Jovana Araškov
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Barbara Janović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Fathi Emhemmed
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Christian D Muller
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Nenad R Filipović
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade, Serbia.
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14
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Orabi EA. Tautomerism and antioxidant activity of some 4-acylpyrazolone-based Schiff bases: a theoretical study. RSC Adv 2018; 8:30842-30850. [PMID: 35548767 PMCID: PMC9085507 DOI: 10.1039/c8ra05987j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/28/2018] [Indexed: 11/23/2022] Open
Abstract
4-Acylpyrazolone Schiff bases display antimicrobial, antiprion, antioxidant, and other biological activities. They are also used as ligands and some of their complexes possess photoluminescence and anticancer properties. These Schiff bases may exist in four tautomeric forms that correspond to H at the C (imine-one(I)), N (imine-one(II)), and O (imine-ol) atoms of the pyrazolone ring or at the azomethine N atom (amine-one). While crystal structures show the amine-one form, the identity of the tautomeric form in solution and the structure–antioxidant activity relationship of these compounds are not clear. We perform quantum mechanical investigations on nine 4-acylpyrazolone-based Schiff bases at the B3LYP/6-311++G(d,p) level of theory in the gas phase and in chloroform, dimethyl sulfoxide, and water using the polarizable continuum model (PCM). Results show that the imine-ol, imine-one(I), and imine-one(II) isomers are, in respective, 6.5–8.0, 17–20, and 19–23 kcal mol−1 less stable than the amine-one form and that solvents further stabilize the later form. The energy barrier for imine-ol to amine-one conversion is only 0–1 kcal mol−1, showing that formation of the latter form is both kinetically and thermodynamically favorable. NMR calculations show that H in the amine-one and imine-ol forms appears at δ = 11.9–12.9 and 14.0–15.7 ppm, respectively, revealing that the experimentally reported 1H NMR spectra of these compounds are due to the amine-one tautomeric form. The structure–antioxidant activity relationship is investigated and structural modifications that increase the antioxidant activity are discussed. Calculations using the PCM show that the vertical ionization potential (IPV) is inversely proportional with the ferric reducing antioxidant power (FRAP) of these compounds. IPV thus presents a valuable tool for predicting the FRAP. Computational investigations reveal that 4-acylpyrazolone Schiff bases adopt the amine-one structure and that ionization potentials provide a measure for their antioxidant activity.![]()
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Affiliation(s)
- Esam A. Orabi
- Department of Chemistry
- Faculty of Science
- Assiut University
- Egypt
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15
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Halide/pseudohalide complexes of cadmium(II) with benzimidazole: Synthesis, crystal structures and fluorescence properties. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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