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Carreño A, Morales-Guevara R, Cepeda-Plaza M, Páez-Hernández D, Preite M, Polanco R, Barrera B, Fuentes I, Marchant P, Fuentes JA. Synthesis, Physicochemical Characterization, and Antimicrobial Evaluation of Halogen-Substituted Non-Metal Pyridine Schiff Bases. Molecules 2024; 29:4726. [PMID: 39407654 PMCID: PMC11477791 DOI: 10.3390/molecules29194726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2024] [Revised: 09/24/2024] [Accepted: 09/27/2024] [Indexed: 10/20/2024] Open
Abstract
Four synthetic Schiff bases (PSB1 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-dibromophenol], PSB2 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-diiodophenol], PSB3 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-iodophenol], and PSB4 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-chloro-6-iodophenol]) were fully characterized. These compounds exhibit an intramolecular hydrogen bond between the hydroxyl group of the phenolic ring and the nitrogen of the azomethine group, contributing to their stability. Their antimicrobial activity was evaluated against various Gram-negative and Gram-positive bacteria, and it was found that the synthetic pyridine Schiff bases, as well as their precursors, showed no discernible antimicrobial effect on Gram-negative bacteria, including Salmonella Typhi (and mutant derivatives), Salmonella Typhimurium, Escherichia coli, and Morganella morganii. In contrast, a more pronounced biocidal effect against Gram-positive bacteria was found, including Bacillus subtilis, Streptococcus agalactiae, Streptococcus pyogenes, Enterococcus faecalis, Staphylococcus aureus, and Staphylococcus haemolyticus. Among the tested compounds, PSB1 and PSB2 were identified as the most effective against Gram-positive bacteria, with PSB2 showing the most potent biocidal effects. Although the presence of reactive oxygen species (ROS) was noted after treatment with PSB2, the primary mode of action for PSB2 does not appear to involve ROS generation. This conclusion is supported by the observation that antioxidant treatment with vitamin C only partially mitigated bacterial inhibition, indicating an alternative biocidal mechanism.
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Affiliation(s)
- Alexander Carreño
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (R.M.-G.); (D.P.-H.)
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. República 275, Santiago 8370146, Chile;
| | - Rosaly Morales-Guevara
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (R.M.-G.); (D.P.-H.)
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador B. O’Higgins 3363, Santiago 9170022, Chile
- Facultad de Ingeniería, Universidad Finis Terrae, Av. Pedro de Valdivia 1509, Santiago 7501015, Chile
| | - Marjorie Cepeda-Plaza
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. República 275, Santiago 8370146, Chile;
| | - Dayán Páez-Hernández
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (R.M.-G.); (D.P.-H.)
| | - Marcelo Preite
- Departamento de Química Orgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile;
| | - Rubén Polanco
- Laboratorio de Hongos Fitopatógenos, Centro de Biotecnología Vegetal (CBV), Facultad de Ciencias de la Vida, Universidad Andres Bello, República 330, Santiago 8370186, Chile;
| | - Boris Barrera
- Escuela de Tecnología Médica, Facultad de Salud, Universidad Santo Tomás, Santiago 8370003, Chile;
| | - Ignacio Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (I.F.); (P.M.)
- Doctorado en Biotecnología, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 330, Santiago 8370186, Chile
| | - Pedro Marchant
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (I.F.); (P.M.)
| | - Juan A. Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello, República 330, Santiago 8370186, Chile; (I.F.); (P.M.)
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Pawariya V, De S, Dutta J. Chitosan-based Schiff bases: Promising materials for biomedical and industrial applications. Carbohydr Polym 2024; 323:121395. [PMID: 37940288 DOI: 10.1016/j.carbpol.2023.121395] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 11/10/2023]
Abstract
There is plenty of scope for modifying chitosan, an only polycationic natural polysaccharide, owing to its reactive functional groups, namely hydroxyl and amino groups. Although innumerable numbers of chitosan derivatives have been synthesized by modifying these groups and reported elsewhere, in this review article, an attempt has been exclusively made to demonstrate the syntheses of various chitosan-based Schiff bases (CSBs) simply by allowing the reactions of reactive amino groups of chitosan with different aldehydes/ketones of interest. Due to their very peculiar and unique characteristics, such as biodegradability, biocompatibility, metal-binding capability, etc., they are found to be very useful for diversified applications. Thus, we have also attempted to showcase their very specific biomedical fields, including tissue engineering, drug delivery, and wound healing, to name a few. In addition, we have also discussed the utilization of CSBs for industrial applications such as wastewater treatment, catalysis, corrosion inhibition, sensors, etc.
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Affiliation(s)
- Varun Pawariya
- Department of Chemistry, Amity School of Applied Sciences, Amity University Haryana, Gurgaon 122413, Haryana, India
| | - Soumik De
- Department of Chemistry, National Institute of Technology, Silchar, Silchar, Assam 788010, India
| | - Joydeep Dutta
- Department of Chemistry, Amity School of Applied Sciences, Amity University Haryana, Gurgaon 122413, Haryana, India.
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Jorge J, Del Pino Santos KF, Timóteo F, Vasconcelos RRP, Ayala Cáceres OI, Granja IJA, de Souza DM, Frizon TEA, Di Vaccari Botteselle G, Braga AL, Saba S, Rashid HU, Rafique J. Recent Advances on the Antimicrobial Activities of Schiff Bases and their Metal Complexes: An Updated Overview. Curr Med Chem 2024; 31:2330-2344. [PMID: 36823995 DOI: 10.2174/0929867330666230224092830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/12/2022] [Accepted: 12/29/2022] [Indexed: 02/25/2023]
Abstract
Schiff bases represent a valuable class of organic compounds, synthesized via condensation of primary amines with ketones or aldehydes. They are renowned for possessing innumerable applications in agricultural chemistry, organic synthesis, chemical and biological sensing, coating, polymer and resin industries, catalysis, coordination chemistry, and drug designing. Schiff bases contain imine or azomethine (-C=N-) functional groups which are important pharmacophores for the design and synthesis of lead bioactive compounds. In medicinal chemistry, Schiff bases have attracted immense attention due to their diverse biological activities. This review aims to encompass the recent developments on the antimicrobial activities of Schiff bases. The article summarizes the antibacterial, antifungal, antiviral, antimalarial, and antileishmanial activities of Schiff bases reported since 2011.
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Affiliation(s)
- Juliana Jorge
- Instituto de Química, Universidade Federal do Mato Grosso do Sul, Campo Grande, 79074-460, MS, Brazil
| | | | - Fernanda Timóteo
- Instituto de Química, Universidade Federal do Mato Grosso do Sul, Campo Grande, 79074-460, MS, Brazil
| | | | | | | | - David Monteiro de Souza
- Instituto de Química, Universidade Federal do Mato Grosso do Sul, Campo Grande, 79074-460, MS, Brazil
| | - Tiago Elias Allievi Frizon
- Department of Energy and Sustainability, Universidade Federal de Santa Catarina - UFSC, Campus Araranguá, Araranguá, 88905-120, SC, Brazil
| | | | - Antonio Luiz Braga
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-970, Florianópolis, SC, Brazil
| | - Sumbal Saba
- Instituto de Química, Universidade Federal de Goiás - UFG, Goiânia, 74690-900, GO, Brazil
| | - Haroon Ur Rashid
- Instituto de Química, Universidade Federal do Mato Grosso do Sul, Campo Grande, 79074-460, MS, Brazil
- Departamento de Química, Universidade Federal de Santa Catarina, 88040-970, Florianópolis, SC, Brazil
| | - Jamal Rafique
- Instituto de Química, Universidade Federal do Mato Grosso do Sul, Campo Grande, 79074-460, MS, Brazil
- Instituto de Química, Universidade Federal de Goiás - UFG, Goiânia, 74690-900, GO, Brazil
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4
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Nariya P, Thakore S. Synthesis, characterization, DFT calculations and application of some metal complexes derived from 2-(((2-(dimethylamino)ethyl)amino)(4-nitrophenyl)methyl)-3-hydroxynaphthalene-1,4-dione. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Conformational and Supramolecular Aspects in Chirality of Flexible Camphor-Containing Schiff Base as an Inducer of Helical Liquid Crystals. Molecules 2023; 28:molecules28052388. [PMID: 36903637 PMCID: PMC10005677 DOI: 10.3390/molecules28052388] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
The experimental and theoretical study of influence of the conformational state and association on the chirality of the stereochemically nonrigid biologically active bis-camphorolidenpropylenediamine (CPDA) and its ability to induce the helical mesophase of alkoxycyanobiphenyls liquid-crystalline binary mixture was carried out. On the basis of quantum-chemical simulation of the CPDA structure, four relatively stable conformers were detected. A comparison of the calculated and experimental electronic circular dichroism (ECD) and 1H, 13C, 15N NMR spectra, as well as specific optical rotation and dipole moments, allowed to establish the most probable trans-gauche conformational state (tg) of dicamphorodiimine and CPDA dimer with a predominantly mutually parallel arrangement of molecular dipoles. The induction of helical phases in LC mixtures based on cyanobiphenyls and bis-camphorolidenpropylenediamine was studied by polarization microscopy. The clearance temperatures and the helix pitch of the mesophases were measured. The helical twisting power (HTP) was calculated. The decrease in HTP with increasing dopant concentration was shown to be connected with the CPDA association process in the LC phase. The effect of camphor-containing chiral dopants of various structures on nematic LCs was compared. The values of the permittivity and birefringence components of the CPDA solutions in CB-2 were measured experimentally. A strong effect of this dopant on the anisotropic physical properties of the induced chiral nematic was established. A significant decrease in the dielectric anisotropy was associated with the 3D compensation of the LC dipoles during the formation of the helix.
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6
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Synthesis, crystal structure, Hirshfeld surface analysis, DNA binding, optical and nonlinear optical properties of Schiff bases derived from o-aminophenol. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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Synthesis, characterization, DFT and biological studies of Fe(II), Cu(II), and Zn(II) complexes of keto-imine chelators. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Morales-Guevara R, Fuentes JA, Páez-Hernández D, Carreño A. Intramolecular Hydrogen Bond in Pyridine Schiff Bases as Ancillary Ligands of Re(I) Complexes Is a Switcher between Visible and NIR Emissions: A Relativistic Quantum Chemistry Study. J Phys Chem A 2022; 126:8997-9007. [PMID: 36413983 DOI: 10.1021/acs.jpca.2c06435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Rhenium(I) tricarbonyl complexes have been described as suitable fluorophores, particularly for biological applications. fac-[Re(CO)3(N,N)L](0 or 1+) complexes, where N,N is a substituted dinitrogenated ligand (bipyridine or derivatives with relatively small substituents) and L the ancillary ligand [a pyridine Schiff base (PSB) harboring an intramolecular hydrogen bond (IHB)], have presented promissory results concerning their use as fluorophores, especially for walled cells (i.e., bacteria and fungi). In this work, we present a relativistic theoretical analysis of two series of fac-[Re(CO)3(N,N)PSB]1+ complexes to predict the role of the IHB in the ancillary ligand concerning their photophysical behavior. N,N corresponds to 2,2'-bipyridine (bpy) (series A) or 4,4'-bis(ethoxycarbonyl)-2,2'-bipyridine (deeb) (series B). We found that all the complexes present absorption in the visible light range. In addition, complexes presenting a PSB with an IHB exhibit luminescent emission suitable for biological purposes: large Stokes shift, emission in the range of 600-700 nm, and τ in the order of 10-2 to 10-3 s. By contrast, complexes with PSB lacking the IHB show a predicted emission with the lowest triplet excited-state energy entering the NIR region. These results suggest a role of the IHB as an important switcher between visible and NIR emissions in this kind of complexes. Since the PSB can be substituted to modulate the properties of the whole Re(I) complex, it will be interesting to explore whether other substitutions can also affect the photophysical properties, mainly the emission range.
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Affiliation(s)
- Rosaly Morales-Guevara
- Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago 8370146, Chile.,Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andrés Bello, República 330, Santiago 8370186, Chile
| | - Juan A Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andrés Bello, República 330, Santiago 8370186, Chile
| | - Dayán Páez-Hernández
- Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago 8370146, Chile.,Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andrés Bello, República 330, Santiago 8370186, Chile
| | - Alexander Carreño
- Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago 8370146, Chile.,Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andrés Bello, República 330, Santiago 8370186, Chile
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9
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Sharma S, Dubey G, Singh Sran B, Sharma M, Kaur V, Kaur S, Bharatam PV, Hundal G. Microwave‐Induced Synthesis of Pyridine Based Schiff Bases and Their Applications as Efficient Antimicrobial Textile Dyeing Agents: Experimental and Theoretical Approach. ChemistrySelect 2022. [DOI: 10.1002/slct.202203109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Sanyog Sharma
- Department of Chemistry UGC Sponsored-Centre for Advanced Studies-II Guru Nanak Dev University Amritsar 143005 Punjab India
| | - Gurudutt Dubey
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research, S.A.S. Nagar Punjab 160062 India
| | - Balkaran Singh Sran
- Department of Chemistry UGC Sponsored-Centre for Advanced Studies-II Guru Nanak Dev University Amritsar 143005 Punjab India
| | - Mansi Sharma
- Department of Chemistry UGC Sponsored-Centre for Advanced Studies-II Guru Nanak Dev University Amritsar 143005 Punjab India
| | - Varinder Kaur
- Department of Chemistry UGC Sponsored-Centre for Advanced Studies-II Guru Nanak Dev University Amritsar 143005 Punjab India
| | - Sukhraj Kaur
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research, S.A.S. Nagar Punjab 160062 India
| | - Prasad V. Bharatam
- Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research, S.A.S. Nagar Punjab 160062 India
| | - Geeta Hundal
- Department of Chemistry UGC Sponsored-Centre for Advanced Studies-II Guru Nanak Dev University Amritsar 143005 Punjab India
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Agren S, Chaabene M, El Haskouri J, Ben Chaâbane R, Lahcini M, Hassen V Baouab M. Anil’s ultrasonic synthesis: A preliminary photophysical study of substituent’s effects on chromogenic and fluorogenic cation sensing. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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11
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Unraveling the Pharmaceutical Benefits of Freshly Prepared Amino Acid-Based Schiff Bases Via DFT, In Silico Molecular Docking and ADMET. J Fluoresc 2022; 32:1873-1888. [PMID: 35749028 DOI: 10.1007/s10895-022-02987-2] [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: 09/20/2021] [Accepted: 05/31/2022] [Indexed: 10/17/2022]
Abstract
A series of amino acid-based Schiff bases have been synthesized using a facile condensation between benzil (a diketone) and amino acid in the presence of a base. The formation of Schiff base compounds has been ensured by elemental analysis, FT-IR, 1H-NMR, 13C-NMR and UV-Vis. spectra. Density Functional Theory (DFT) calculations have been explored in order to get intuition into the molecular structure and chemical reactivity of the compounds. The DFT, optimized structure of the compounds, has been used to attain the molecular docking studies with DNA structure to find the favorable mode of interaction. In silico ADME/Tox profile of the compounds has been predicted using pkCSM web tools, exhibiting suitable values of absorption, distribution, and metabolism. These obtained parameters are connected to bioavailability. In addition, toxicity, skin sensitization and cardiotoxicity (hERG) analysis have been performed for evaluating the drug-like character of the prepared Schiff bases. The findings obtained from this study may find applications in the field focusing on the production of efficient and harmless pharmacological drugs.
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12
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Kavitha E, Ramarajan D, Rakić A, Dimić D, Sudha S, Nirmala PN. Structural, spectroscopic, quantum chemical, and molecular docking investigation of (E)-N'-(2,5-dimethoxybenzylidene)picolinohydrazide. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132259] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Physicochemical and Theoretical Characterization of a New Small Non-Metal Schiff Base with a Differential Antimicrobial Effect against Gram-Positive Bacteria. Int J Mol Sci 2022; 23:ijms23052553. [PMID: 35269699 PMCID: PMC8910636 DOI: 10.3390/ijms23052553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/17/2022] [Accepted: 02/20/2022] [Indexed: 11/17/2022] Open
Abstract
Searching for adequate and effective compounds displaying antimicrobial activities, especially against Gram-positive bacteria, is an important research area due to the high hospitalization and mortality rates of these bacterial infections in both the human and veterinary fields. In this work, we explored (E)-4-amino-3-((3,5-di-tert-butyl-2-hydroxybenzylidene)amino) benzoic acid (SB-1, harboring an intramolecular hydrogen bond) and (E)-2-((4-nitrobenzilidene)amino)aniline (SB-2), two Schiff bases derivatives. Results demonstrated that SB-1 showed an antibacterial activity determined by the minimal inhibitory concentration (MIC) against Staphylococcus aureus, Enterococcus faecalis, and Bacillus cereus (Gram-positive bacteria involved in human and animal diseases such as skin infections, pneumonia, diarrheal syndrome, and urinary tract infections, among others), which was similar to that shown by the classical antibiotic chloramphenicol. By contrast, this compound showed no effect against Gram-negative bacteria (Klebsiella pneumoniae, Escherichia coli, and Salmonella enterica). Furthermore, we provide a comprehensive physicochemical and theoretical characterization of SB-1 (as well as several analyses for SB-2), including elemental analysis, ESMS, 1H and 13C NMR (assigned by 1D and 2D techniques), DEPT, UV-Vis, FTIR, and cyclic voltammetry. We also performed a computational study through the DFT theory level, including geometry optimization, TD-DFT, NBO, and global and local reactivity analyses.
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Gurusamy S, Krishnaveni K, Sankarganesh M, Nandini Asha R, Mathavan A. Synthesis, characterization, DNA interaction, BSA/HSA binding activities of VO(IV), Cu(II) and Zn(II) Schiff base complexes and its molecular docking with biomolecules. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117045] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Majumdar D, Elizabeth Philip J, Roy S, Tüzün B. Reinvigorate the synthesis, spectroscopic findings, SEM morphology investigation, and antimicrobial silhouette of contemporary Salen ligands: A comprehensive DFT landscape. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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16
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Morales-Guevara R, Fuentes JA, Paez-Hernández D, Carreño A. The role of substituted pyridine Schiff bases as ancillary ligands in the optical properties of a new series of fac-rhenium(i) tricarbonyl complexes: a theoretical view. RSC Adv 2021; 11:37181-37193. [PMID: 35496390 PMCID: PMC9043815 DOI: 10.1039/d1ra05737e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 12/01/2021] [Accepted: 11/01/2021] [Indexed: 11/21/2022] Open
Abstract
Over the last few years, luminescent Re(i) tricarbonyl complexes have been increasingly proposed as fluorophores suitable for fluorescence microscopy to visualize biological structures and cells. In this sense, incorporating an asymmetrical pyridine Schiff base (PSB) as the ancillary ligand strongly modifies the staining and luminescent properties of Re(i) tricarbonyl complexes. In this work, we analyzed two series of Re(i) tricarbonyl complexes with their respective PSB ligands: (1) fac-[Re(CO)3(2,2'-bpy)(PSB)]1+ and (2) fac-[Re(CO)3(4,4'-bis(ethoxycarbonyl)-2,2'-bpy)(PSB)]1+, where the PSB exhibits substitutions at positions 4 or 6 in the phenolic ring with methyl or halogen substituents. Thus, we performed computational relativistic DFT and TDDFT studies to determine their optical properties. The ten complexes analyzed showed absorption in the visible light range. Furthermore, our analyses, including zero-field splitting (ZFS), allowed us to determine that the low-lying excited state locates below the 3LLCT states. Interestingly, seven of the ten analyzed complexes, whose corresponding PSB harbors an intramolecular hydrogen bond (IHB), exhibited luminescent emission that could be suitable for biological purposes: large Stokes shift, emission in the range 600-700 nm and τ in the order of 10-2 to 10-3 s. Conversely, the three complexes lacking the IHB due to two halogen substituents in the corresponding PSB showed a predicted emission with the lowest triplet excited state energy entering the NIR region. The main differences in the complexes' photophysical behavior have been explained by the energy gap law and time-resolved luminescence. These results emphasize the importance of choosing suitable substituents at the 4 and 6 positions in the phenolic ring of the PSB, which determine the presence of the IHB since they modulate the luminescence properties of the Re(i) core. Therefore, this study could predict Re(i) tricarbonyl complexes' properties, considering the desired emission features for biological and other applications.
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Affiliation(s)
- Rosaly Morales-Guevara
- Universidad Andres Bello, Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas Santiago Chile
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello República 330 Santiago Chile
| | - Juan A Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello República 330 Santiago Chile
| | - Dayán Paez-Hernández
- Universidad Andres Bello, Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas Santiago Chile
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello República 330 Santiago Chile
| | - Alexander Carreño
- Universidad Andres Bello, Programa de Doctorado en Físicoquímica Molecular, Facultad de Ciencias Exactas Santiago Chile
- Laboratory of Organometallic Synthesis, Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello República 330 Santiago Chile
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17
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Abdel El‐wahab HAA, Hamdy AK, Schulzke C, Aboul‐Fadl T, Qayed WS. Crystal structure and quantum chemical calculations of (
E
)1‐benzyl‐3‐((4‐methoxyphenyl)imino)‐5‐methylindolin‐2‐one. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Ahmed K. Hamdy
- Department of Medicinal Chemistry, Faculty of Pharmacy Assuit University Assuit Egypt
| | - Carola Schulzke
- Institut für Biochemie Universität Greifswald Greifswald Germany
| | - Tarek Aboul‐Fadl
- Department of Medicinal Chemistry, Faculty of Pharmacy Assuit University Assuit Egypt
| | - Wesam S. Qayed
- Department of Medicinal Chemistry, Faculty of Pharmacy Assuit University Assuit Egypt
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18
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Rafiee Samani Z, Mehranpour A. Synthesis of new allylidene amino phenol-containing Schiff bases and metal complex formation using trimethinium salts. RSC Adv 2021; 11:21695-21701. [PMID: 35478780 PMCID: PMC9034104 DOI: 10.1039/d1ra04214a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 06/14/2021] [Indexed: 02/03/2023] Open
Abstract
An efficient route for the synthesis of novel Schiff bases from the condensation reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with diverse aminophenols in the presence of triethylamine in EtOH at reflux is described. Complexes of transition metals with Schiff base ligand (L) 3c, having the donor atom set N2O2, were studied. The ultraviolet spectral behavior of the complexes in DMSO was investigated and the λmax of these compounds was examined. The structure of the new compounds was confirmed based on their spectral data from IR, 1H NMR and 13C NMR, mass spectra, and elemental analysis. An efficient route for the synthesis of novel Schiff bases from the condensation reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with diverse aminophenols in the presence of triethylamine in EtOH at reflux is described.![]()
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Affiliation(s)
- Ziba Rafiee Samani
- Department of Chemistry, Faculty of Sciences, Persian Gulf University Bushehr 75169 Iran
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19
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Ultrasound-based synthesis, SC-XRD, NMR, DFT, HSA of new Schiff bases derived from 2-aminopyridine: Experimental and theoretical studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130105] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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20
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Lara-Cerón JA, Jiménez-Pérez VM, Molina-Paredes AA, Sánchez M, Dias HVR, Ramírez-Montes PI, Muñoz-Flores BM. Preferential intermolecular interactions in a racemic mixture of amino acid Schiff base, conformational structures in solid state, and DFT studies. NEW J CHEM 2021. [DOI: 10.1039/d0nj04720a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this work, we report the green synthesis of a Shiff base [N-(2-hydroxy-1-naphthylidene)-l-phenylalanine (1)] derived from an α-amino acid through an ultrasound-assisted synthesis method with excellent chemical yield in a short period of time.
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Affiliation(s)
- Jesús A. Lara-Cerón
- Universidad Autónoma de Nuevo León
- Facultad de Ciencias Químicas
- Ciudad Universitaria
- Nuevo León
- Mexico
| | - Víctor M. Jiménez-Pérez
- Universidad Autónoma de Nuevo León
- Facultad de Ciencias Químicas
- Ciudad Universitaria
- Nuevo León
- Mexico
| | - Areli A. Molina-Paredes
- Universidad Autónoma de Nuevo León
- Facultad de Ciencias Químicas
- Ciudad Universitaria
- Nuevo León
- Mexico
| | - Mario Sánchez
- Centro de Investigación en Materiales Avanzados
- S.C., Alianza Norte 202
- PIIT
- Carretera Monterrey-Aeropuerto Km. 10
- Apodaca
| | - H. V. Rasika Dias
- Department of Chemistry and Biochemistry
- The University of Texas at Arlington
- Arlington
- USA
| | - Pedro I. Ramírez-Montes
- Universidad Nacional Autónoma de México
- Facultad de Estudios Superiores Cuautitlán
- Departamento de Matemáticas
- 54714 Cuautitlán Izcalli
- Mexico
| | - Blanca M. Muñoz-Flores
- Universidad Autónoma de Nuevo León
- Facultad de Ciencias Químicas
- Ciudad Universitaria
- Nuevo León
- Mexico
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21
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Adeleke AA, Islam MS, Olofinsan K, Salau VF, Mocktar C, Omondi B. Evaluation of substituent bioactivity and anion impact of linear and T-shaped silver( i) pyridinyl complexes as potential antiproliferative, antioxidant, antimicrobial agents and DNA- and BSA-binders. NEW J CHEM 2021. [DOI: 10.1039/d1nj03231c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The impact of ligand substituents and anion variation on the bio-activity of pyridinyl Ag(I) complexes was evaluated. The complexes showed potential therapeutic ability with notable anticancer, antioxidant, and antimicrobial activities.
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Affiliation(s)
- Adesola A. Adeleke
- School of Chemistry and Physics, University of Kwazulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
- Department of Chemical Sciences, Olabisi Onabanjo University, Ago-Iwoye, P. M. B. 2002, Nigeria
| | - Md. Shahidul Islam
- Discipline of Biochemistry, School of Life Sciences, University of Kwazulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Kolawole Olofinsan
- Discipline of Biochemistry, School of Life Sciences, University of Kwazulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Veronica F. Salau
- Discipline of Biochemistry, School of Life Sciences, University of Kwazulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Chunderika Mocktar
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of Kwazulu-Natal, Westville Campus, Private Bag X54001, Durban 4000, South Africa
| | - Bernard Omondi
- School of Chemistry and Physics, University of Kwazulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
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22
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Cao C, Li L, Cao C, Liu J. The effect of intramolecular hydrogen bond on the ultraviolet absorption of bi‐aryl Schiff bases. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chao‐Tun Cao
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan China
| | - Luyao Li
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan China
| | - Chenzhong Cao
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan China
| | - Junlan Liu
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, School of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan China
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23
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Luo Y, Wang J, Zhang B, Guan Y, Yang T, Li X, Xu L, Wang J, You Z. Syntheses, characterization and crystal structures of fluorine substituted Schiff base copper(II) and nickel(II) complexes with biological activity. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1795645] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yingying Luo
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Jiaqi Wang
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Bitong Zhang
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Yixing Guan
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Ting Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People’s Republic of China
| | - Xiaoyan Li
- Zibo Vocational Institute, Zibo, People’s Republic of China
| | - Luyao Xu
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Jing Wang
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
| | - Zhonglu You
- Department of Chemistry, Liaoning Normal University, Dalian, People’s Republic of China
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24
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Structural Characterization, DFT Calculation, NCI, Scan-Rate Analysis and Antifungal Activity against Botrytis cinerea of ( E)-2-{[(2-Aminopyridin-2-yl)imino]-methyl}-4,6-di- tert-butylphenol (Pyridine Schiff Base). MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25122741. [PMID: 32545715 PMCID: PMC7357110 DOI: 10.3390/molecules25122741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
Botrytis cinerea is a ubiquitous necrotrophic filamentous fungal phytopathogen that lacks host specificity and can affect more than 1000 different plant species. In this work, we explored L1 [(E)-2-{[(2-aminopyridin-2-yl)imino]-methyl}-4,6-di-tert-butylphenol], a pyridine Schiff base harboring an intramolecular bond (IHB), regarding their antifungal activity against Botrytis cinerea. Moreover, we present a full characterization of the L1 by NMR and powder diffraction, as well as UV–vis, in the presence of previously untested different organic solvents. Complementary time-dependent density functional theory (TD-DFT) calculations were performed, and the noncovalent interaction (NCI) index was determined. Moreover, we obtained a scan-rate study on cyclic voltammetry of L1. Finally, we tested the antifungal activity of L1 against two strains of Botrytis cinerea (B05.10, a standard laboratory strain; and A1, a wild type strains isolated from Chilean blueberries). We found that L1 acts as an efficient antifungal agent against Botrytis cinerea at 26 °C, even better than the commercial antifungal agent fenhexamid. Although the antifungal activity was also observed at 4 °C, the effect was less pronounced. These results show the high versatility of this kind of pyridine Schiff bases in biological applications.
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25
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Affiliation(s)
- Shazia Parveen
- Faculty of Science, Chemistry Department Taibah University Yanbu Branch Yanbu 46423 Saudi Arabia
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26
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Tan XJ, Wang D, Hei XM, Yang FC, Zhu YL, Xing DX, Ma JP. Synthesis, crystal structures, antiproliferative activities and reverse docking studies of eight novel Schiff bases derived from benzil. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2020; 76:44-63. [PMID: 31919307 DOI: 10.1107/s2053229619015687] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 11/19/2019] [Indexed: 12/15/2022]
Abstract
Eight novel Schiff bases derived from benzil dihydrazone (BDH) or benzil monohydrazone (BMH) and four fused-ring carbonyl compounds (3-formylindole, FI; 3-acetylindole, AI; 3-formyl-1-methylindole, MFI; 1-formylnaphthalene, FN) were synthesized and characterized by elemental analysis, ESI-QTOF-MS, 1H and 13C NMR spectroscopy, as well as single-crystal X-ray diffraction. They are (1Z,2Z)-1,2-bis{(E)-[(1H-indol-3-yl)methylidene]hydrazinylidene}-1,2-diphenylethane (BDHFI), C32H24N6, (1Z,2Z)-1,2-bis{(E)-[1-(1H-indol-3-yl)ethylidene]hydrazinylidene}-1,2-diphenylethane (BDHAI), C34H28N6, (1Z,2Z)-1,2-bis{(E)-[(1-methyl-1H-indol-3-yl)methylidene]hydrazinylidene}-1,2-diphenylethane (BMHMFI) acetonitrile hemisolvate, C34H28N6·0.5CH3CN, (1Z,2Z)-1,2-bis{(E)-[(naphthalen-1-yl)methylidene]hydrazinylidene}-1,2-diphenylethane (BDHFN), C36H26N4, (Z)-2-{(E)-[(1H-indol-3-yl)methylidene]hydrazinylidene}-1,2-diphenylethanone (BMHFI), C23H17N3O, (Z)-2-{(E)-[1-(1H-indol-3-yl)ethylidene]hydrazinylidene}-1,2-diphenylethanone (BMHAI), C24H19N3O, (Z)-2-{(E)-[(1-methyl-1H-indol-3-yl)methylidene]hydrazinylidene}-1,2-diphenylethanone (BMHMFI), C24H19N3O, and (Z)-2-{(E)-[(naphthalen-1-yl)methylidene]hydrazinylidene}-1,2-diphenylethanone (BMHFN) C25H18N2O. Moreover, the in vitro cytotoxicity of the eight title compounds was evaluated against two tumour cell lines (A549 human lung cancer and 4T1 mouse breast cancer) and two normal cell lines (MRC-5 normal lung cells and NIH 3T3 fibroblasts) by MTT assay. The results indicate that four (BDHMFI, BDHFN, BMHMFI and BMHFN) are inactive and the other four (BDHFI, BDHAI, BMHFI and BMHAI) show severe toxicities against human A549 and mouse 4T1 cells, similar to the standard cisplatin. All the compounds exhibited weaker cytotoxicity against normal cells than cancer cells. The Swiss Target Prediction web server was applied for the prediction of protein targets. After analyzing the differences in frequency hits between these active and inactive Schiff bases, 18 probable targets were selected for reverse docking with the Surflex-dock function in SYBYL-X 2.0 software. Three target proteins, i.e. human ether-á-go-go-related (hERG) potassium channel, the inhibitor of apoptosis protein 3 and serine/threonine-protein kinase PIM1, were chosen as the targets. Finally, the ligand-based structure-activity relationships were analyzed based on the putative protein target (hERG) docking results, which will be used to design and synthesize novel hERG ion channel inhibitors.
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Affiliation(s)
- Xue Jie Tan
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Di Wang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Xiao Ming Hei
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Feng Cun Yang
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Ya Ling Zhu
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Dian Xiang Xing
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, People's Republic of China
| | - Jian Ping Ma
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Centre of Functionalized Probes for Chemical Imaging, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, People's Republic of China
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27
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Ibrahim HM, Behbehani H. Sustainable Synthetic Approach for (Pyrazol-4-ylidene)pyridines By Metal Catalyst-Free Aerobic C(sp 2)-C(sp 3) Coupling Reactions between 1-Amino-2-imino-pyridines and 1-Aryl-5-pyrazolones. ACS OMEGA 2019; 4:11701-11711. [PMID: 31460276 PMCID: PMC6682090 DOI: 10.1021/acsomega.9b01650] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/21/2019] [Indexed: 05/26/2023]
Abstract
A novel, metal catalyst-free, and efficient method has been developed for the synthesis of (pyrazol-4-ylidene)pyridine derivatives. The process involves dehydrogenative coupling of 1-amino-2-imino-pyridines with 1-aryl-5-pyrazolone derivatives utilizing O2 as the sole oxidant. The new method benefits from a high atom economy, efficiency, and substrate scope, as well as the simplicity of reaction and product purification procedures.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
- Chemistry
Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum, Egypt
| | - Haider Behbehani
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
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28
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Otero C, Carreño A, Polanco R, Llancalahuen FM, Arratia-Pérez R, Gacitúa M, Fuentes JA. Rhenium (I) Complexes as Probes for Prokaryotic and Fungal Cells by Fluorescence Microscopy: Do Ligands Matter? Front Chem 2019; 7:454. [PMID: 31297366 PMCID: PMC6606945 DOI: 10.3389/fchem.2019.00454] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/07/2019] [Indexed: 12/22/2022] Open
Abstract
Re(I) complexes have exposed highly suitable properties for cellular imaging (especially for fluorescent microscopy) such as low cytotoxicity, good cellular uptake, and differential staining. These features can be modulated or tuned by modifying the ligands surrounding the metal core. However, most of Re(I)-based complexes have been tested for non-walled cells, such as epithelial cells. In this context, it has been proposed that Re(I) complexes are inefficient to stain walled cells (i.e., cells protected by a rigid cell wall, such as bacteria and fungi), presumably due to this physical barrier hampering cellular uptake. More recently, a series of studies have been published showing that a suitable combination of ligands is useful for obtaining Re(I)-based complexes able to stain walled cells. This review summarizes the main characteristics of different fluorophores used in bioimage, remarking the advantages of d6-based complexes, and focusing on Re(I) complexes. In addition, we explored different structural features of these complexes that allow for obtaining fluorophores especially designed for walled cells (bacteria and fungi), with especial emphasis on the ligand choice. Since many pathogens correspond to bacteria and fungi (yeasts and molds), and considering that these organisms have been increasingly used in several biotechnological applications, development of new tools for their study, such as the design of new fluorophores, is fundamental and attractive.
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Affiliation(s)
- Carolina Otero
- Facultad de Medicina, Escuela de Química y Farmacia, Universidad Andres Bello, Santiago, Chile
| | - Alexander Carreño
- Center for Applied Nanosciences (CANS), Universidad Andres Bello, Santiago, Chile
| | - Rubén Polanco
- Facultad de Ciencias de la Vida, Centro de Biotecnología Vegetal, Universidad Andres Bello, Santiago, Chile
| | - Felipe M Llancalahuen
- Facultad de Medicina, Escuela de Química y Farmacia, Universidad Andres Bello, Santiago, Chile
| | - Ramiro Arratia-Pérez
- Center for Applied Nanosciences (CANS), Universidad Andres Bello, Santiago, Chile
| | - Manuel Gacitúa
- Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Santiago, Chile
| | - Juan A Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
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29
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Recent developments in penta-, hexa- and heptadentate Schiff base ligands and their metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.010] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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30
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Pratihar JL, Mandal P, Lai CK, Chattopadhyay S. Tetradentate amido azo Schiff base Cu(II), Ni(II) and Pd(II) complexes: Synthesis, characterization, spectral properties, and applications to catalysis in C–C coupling and oxidation reaction. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Ibrahim HM, Ahmed Arafa WA, Behbehani H. l-Proline catalyzed one-pot synthesis of polysubstituted pyridine system incorporating benzothiazole moiety via sustainable sonochemical approach. RSC Adv 2018; 8:37606-37617. [PMID: 35558590 PMCID: PMC9089412 DOI: 10.1039/c8ra07013j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 10/18/2018] [Indexed: 11/21/2022] Open
Abstract
The efficient, highly convenient synthesis of polysubstituted pyridine derivatives was established via the reaction of N-(benzothiazol-2-yl)-2-cyanoacetamides with an assortment of arylidene malononitriles and arylidene ethyl cyanoacetates in the presence of l-proline as an efficient organocatalyst for this type of ultrasonic-mediated Michael addition. The mechanistic pathway and factors affecting this reaction were also established. The main characteristics of this procedure are high yields, use of a cost-effective catalyst, and easy work-up and purification.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry Department, Faculty of Science, Fayoum University P. O. Box 63514 Fayoum Egypt +965-248-164-82 +965-55216585
| | - Wael Abdelgayed Ahmed Arafa
- Chemistry Department, Faculty of Science, Fayoum University P. O. Box 63514 Fayoum Egypt +965-248-164-82 +965-55216585
- Chemistry Department, College of Science, Jouf University P. O. Box 2014 Sakaka Aljouf Kingdom of Saudi Arabia
| | - Haider Behbehani
- Chemistry Department, Faculty of Science, Kuwait University P. O. Box 5969 Safat 13060 Kuwait +965-248-164-82 +965-55888646
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32
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Carreño A, Rodríguez L, Páez-Hernández D, Martin-Trasanco R, Zúñiga C, Oyarzún DP, Gacitúa M, Schott E, Arratia-Pérez R, Fuentes JA. Two New Fluorinated Phenol Derivatives Pyridine Schiff Bases: Synthesis, Spectral, Theoretical Characterization, Inclusion in Epichlorohydrin-β-Cyclodextrin Polymer, and Antifungal Effect. Front Chem 2018; 6:312. [PMID: 30109223 PMCID: PMC6080543 DOI: 10.3389/fchem.2018.00312] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 07/09/2018] [Indexed: 12/25/2022] Open
Abstract
It has been reported that the structure of the Schiff bases is fundamental for their function in biomedical applications. Pyridine Schiff bases are characterized by the presence of a pyridine and a phenolic ring, connected by an azomethine group. In this case, the nitrogen present in the pyridine is responsible for antifungal effects, where the phenolic ring may be also participating in this bioactivity. In this study, we synthesized two new pyridine Schiff Bases: (E)-2-[(3-Amino-pyridin-4-ylimino)-methyl]-4,6-difluoro-phenol (F1) and (E)- 2-[(3-Amino-pyridin-4-ylimino)-methyl]-6-fluoro-phenol (F2), which only differ in the fluorine substitutions in the phenolic ring. We fully characterized both F1 and F2 by FTIR, UV-vis, 1H; 13C; 19F-NMR, DEPT, HHCOSY, TOCSY, and cyclic voltammetry, as well as by computational studies (DFT), and NBO analysis. In addition, we assessed the antifungal activity of both F1 (two fluorine substitution at positions 4 and 6 in the phenolic ring) and F2 (one fluorine substitution at position 6 in the phenolic ring) against yeasts. We found that only F1 exerted a clear antifungal activity, showing that, for these kind of Schiff bases, the phenolic ring substitutions can modulate biological properties. In addition, we included F1 and F2 into in epichlorohydrin-β-cyclodextrin polymer (βCD), where the Schiff bases remained inside the βCD as determined by the ki, TGA, DSC, and SBET. We found that the inclusion in βCD improved the solubility in aqueous media and the antifungal activity of both F1 and F2, revealing antimicrobial effects normally hidden by the presence of common solvents (e.g., DMSO) with some cellular inhibitory activity. The study of structural prerequisites for antimicrobial activity, and the inclusion in polymers to improve solubility, is important for the design of new drugs.
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Affiliation(s)
- Alexander Carreño
- Center of Applied Nanosciences, Universidad Andres Bello, Santiago, Chile.,Fondo Nacional de Desarrollo Científico y Tecnológico, Santiago, Chile
| | - Leonardo Rodríguez
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | | | | | - César Zúñiga
- Center of Applied Nanosciences, Universidad Andres Bello, Santiago, Chile
| | - Diego P Oyarzún
- Center of Applied Nanosciences, Universidad Andres Bello, Santiago, Chile
| | | | - Eduardo Schott
- Departamento de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Juan A Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
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