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Ömeroğlu İ. Novel non-peripheral mercaptopyridine-substituted mono- and double-decker lutetium(III) phthalocyanines: synthesis, photophysicochemical and electrochemical properties. Dalton Trans 2024; 53:5985-5992. [PMID: 38465966 DOI: 10.1039/d3dt04341j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
In this study, novel non-peripheral tetra-mercaptopyridine-substituted mono- and double-decker phthalocyanines (LuPc and LuPc2) containing lutetium(III) as a rare earth metal were synthesized and characterized using different spectroscopic techniques. ESR and electrochemical analyses were performed to support the sandwich structure of LuPc2. The g factor was determined to be 2.00039 and the characteristic first reduction couple at 0.29 V indicated a reduction of the radical Pc ring of LuPc2. In addition, the UV-Vis-NIR spectra of LuPc2 in neutral, reduced, and oxidized states demonstrate its intrinsic π-radical nature in CHCl3. The photophysicochemical properties of LuPc and LuPc2 were investigated in DMSO. It was found that mono-phthalocyanine (LuPc) is a more effective photosensitizer than double-decker (LuPc2) and metal-free (H2Pc) phthalocyanines based on a comparison of their photophysical and photochemical properties. The singlet oxygen quantum yields (ΦΔ) of the synthesized LuPc and LuPc2 compounds were calculated to be 0.57 and 0.14, respectively, and the obtained results were compared with H2Pc (ΦΔ = 0.04). Also, electrochemical measurements were performed to estimate their redox potentials and the results indicated the important electrochemical performance of double-decker phthalocyanine (LuPc2).
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Affiliation(s)
- İpek Ömeroğlu
- Department of Chemistry, Faculty of Basic Sciences, Gebze Technical University, Kocaeli, Turkey.
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2
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Liu YF, Hu CW, Yang GP. Recent advances in polyoxometalates acid-catalyzed organic reactions. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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3
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Alici EH, Bilgiçli AT, Tüzün B, Günsel A, Arabaci G, Nilüfer Yarasir M. Alkyl chain modified metalophthalocyanines with enhanced antioxidant-antimicrobial properties by doping Ag+ and Pd2+ ions. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132634] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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4
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Castro Jara M, Silva ACA, Ritter M, da Silva AF, Gonçalves CL, dos Santos PR, Borja LS, de Pereira CMP, da Silva Nascente P. Dihydropyrimidinones Against Multiresistant Bacteria. Front Microbiol 2022; 13:743213. [PMID: 35369453 PMCID: PMC8973396 DOI: 10.3389/fmicb.2022.743213] [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: 07/17/2021] [Accepted: 02/14/2022] [Indexed: 11/17/2022] Open
Abstract
The increase in bacterial resistance to antimicrobials has led to high morbidity and mortality rates, posing a major public health problem, requiring the discovery of novel antimicrobial substances. The biological samples were identified as the Gram-negative bacilli Acinetobacter baumannii, Escherichia coli, Enterobacter cloacae, Klebsiella pneumoniae, Morganella morgannii, Pseudomonas aeruginosa and Serratia marcescens and the Gram-positive cocci Enterococcus faecium, and Staphylococcus aureus, all of them resistant to at least three classes of antimicrobials. The antibacterial activity of the compounds was checked in vitro by determining the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) by the broth microdilution method and plating in brain heart infusion (BHI) agar, respectively. The chemical characterization of the compounds was performed by measuring the melting point and gas chromatography coupled with mass spectrometry (GC–MS) on a Shimadzu GC–MS-QP system 2010SE. Synthetic compounds showed antimicrobial activity against Gram-positive cocci at MIC concentrations 0.16–80 μg/ml and Gram-negative bacilli at MIC concentrations 23.2–80 μg/ml. Enterococcus faecium and S. aureus had the best MIC values. The results of the cytotoxicity test indicated that the synthetic compounds showed no significant difference in three concentrations tested (5, 20, and 80 μg/ml), allowing cell viability not different from that assigned to the control, without the tested compounds. In this context, the development of DHPM derivatives brings an alternative and perspective on effectiveness of drugs as potential future antimicrobial agents.
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Affiliation(s)
- Marisa Castro Jara
- Postgraduate Program in Biochemistry and Bioprospecting, Federal University of Pelotas, Pelotas, Brazil
- Department of Microbiology and Parasitology, Institute of Biology, Federal University of Pelotas, Pelotas, Brazil
- *Correspondence: Marisa Castro Jara,
| | - Allison Carlos Assunção Silva
- Lipidomics and Bioorganics Laboratory, Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, Brazil
| | - Marina Ritter
- Lipidomics and Bioorganics Laboratory, Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, Brazil
| | | | - Carolina Lambrecht Gonçalves
- Department of Microbiology and Parasitology, Institute of Biology, Federal University of Pelotas, Pelotas, Brazil
| | - Pedro Rassier dos Santos
- Department of Microbiology and Parasitology, Institute of Biology, Federal University of Pelotas, Pelotas, Brazil
| | - Luciano Sisconetto Borja
- Lipidomics and Bioorganics Laboratory, Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, Brazil
| | - Cláudio Martin Pereira de Pereira
- Lipidomics and Bioorganics Laboratory, Center for Chemical, Pharmaceutical and Food Sciences, Federal University of Pelotas, Pelotas, Brazil
| | - Patrícia da Silva Nascente
- Postgraduate Program in Biochemistry and Bioprospecting, Federal University of Pelotas, Pelotas, Brazil
- Department of Microbiology and Parasitology, Institute of Biology, Federal University of Pelotas, Pelotas, Brazil
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5
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Marinescu M. Biginelli Reaction Mediated Synthesis of Antimicrobial Pyrimidine Derivatives and Their Therapeutic Properties. Molecules 2021; 26:6022. [PMID: 34641566 PMCID: PMC8512088 DOI: 10.3390/molecules26196022] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/25/2021] [Accepted: 09/30/2021] [Indexed: 11/16/2022] Open
Abstract
Antimicrobial resistance was one of the top priorities for global public health before the start of the 2019 coronavirus pandemic (COVID-19). Moreover, in this changing medical landscape due to COVID-19, finding new organic structures with antimicrobial and antiviral properties is a priority in current research. The Biginelli synthesis that mediates the production of pyrimidine compounds has been intensively studied in recent decades, especially due to the therapeutic properties of the resulting compounds, such as calcium channel blockers, anticancer, antiviral, antimicrobial, anti-inflammatory or antioxidant compounds. In this review we aim to review the Biginelli syntheses reported recently in the literature that mediates the synthesis of antimicrobial compounds, the spectrum of their medicinal properties, and the structure-activity relationship in the studied compounds.
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Affiliation(s)
- Maria Marinescu
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Soseaua Panduri, 030018 Bucharest, Romania
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6
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Carvalho RL, de Miranda AS, Nunes MP, Gomes RS, Jardim GAM, Júnior ENDS. On the application of 3d metals for C-H activation toward bioactive compounds: The key step for the synthesis of silver bullets. Beilstein J Org Chem 2021; 17:1849-1938. [PMID: 34386103 PMCID: PMC8329403 DOI: 10.3762/bjoc.17.126] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/28/2021] [Indexed: 01/24/2023] Open
Abstract
Several valuable biologically active molecules can be obtained through C-H activation processes. However, the use of expensive and not readily accessible catalysts complicates the process of pharmacological application of these compounds. A plausible way to overcome this issue is developing and using cheaper, more accessible, and equally effective catalysts. First-row transition (3d) metals have shown to be important catalysts in this matter. This review summarizes the use of 3d metal catalysts in C-H activation processes to obtain potentially (or proved) biologically active compounds.
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Affiliation(s)
- Renato L Carvalho
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Amanda S de Miranda
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Mateus P Nunes
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MG, Brazil
| | - Roberto S Gomes
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, ND, United States
| | - Guilherme A M Jardim
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MG, Brazil
- Centre for Excellence for Research in Sustainable Chemistry (CERSusChem), Department of Chemistry, Federal University of São Carlos – UFSCar, CEP 13565-905, São Carlos, SP, Brazil
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais - UFMG, CEP 31270-901, Belo Horizonte, MG, Brazil
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ZrCl4-catalyzed nucleophilic dearomatization of 2-hydroxy-pyrimidines: A concise synthesis of novel 3,4-dihydropyrimidin-2(1H)-ones containing a phosphonic ester group. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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do Nascimento LG, Dias IM, Meireles de Souza GB, Dancini-Pontes I, Fernandes NRC, de Souza PS, Roberto de Oliveira G, Alonso CG. Niobium Oxides as Heterogeneous Catalysts for Biginelli Multicomponent Reaction. J Org Chem 2020; 85:11170-11180. [PMID: 32786650 DOI: 10.1021/acs.joc.0c01167] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This study reports a simple, reusable, and recoverable niobium-based heterogeneous catalysts for Biginelli multicomponent reactions. Different methods of catalysts preparation were investigated. For this purpose, HY-340 (Nb2O5·nH2O) and Nb2O5 were chemically and/or thermally treated and investigated as catalysts for dihydropyrimidinones (DHPMs) production. The catalysts were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, temperature-programmed desorption of NH3, adsorption/desorption of N2 at -196 °C, and thermogravimetric and differential thermal analysis. The characterization results showed that niobium oxides have the potential to be used as catalysts because of high crystallinity and large surface area. Among the tested catalysts, Nb2O5 chemically treated (Nb2O5/T) showed the best catalytic performance. In the absence of solvents, 94% yield of DHPMs was achieved. Also, Nb2O5/T can be reused three times without a significant yield decrease. Additionally, a feasible reaction pathway was suggested based on the Knoevenagel mechanism for DHPM synthesis using niobium-based catalysts.
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Affiliation(s)
| | - Isabela Milhomem Dias
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
| | | | - Isabela Dancini-Pontes
- Chemical Engineering Department, State University of Maringá, CEP 87020-900 Maringá, Paraná, Brazil
| | | | - Paulo Sérgio de Souza
- Institute of Chemistry, Federal University of Goiás, CEP 74690-900 Goiânia, Goiás, Brazil
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Liu ZL, Zhang RM, Liu Y, Guo Y, Meng QG. The Effects of Different Catalysts, Substituted Aromatic Aldehydes on One-Pot Three-Component Biginelli Reaction. Curr Org Synth 2020; 16:181-186. [PMID: 31965933 DOI: 10.2174/1570179416666181122100405] [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: 12/18/2017] [Revised: 09/17/2018] [Accepted: 11/02/2018] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE The Biginelli reaction, first reported in 1893, is one great example of the important multicomponent reactions reported from 1893. Under the same conditions, the influence of the common catalysts on the yield of the Biginelli reaction was investigated. MATERIALS AND METHOD To a round-bottom flask equipped with a spherical condenser were added 1,3- dicarbonyl compound (1.0 eq), urea (1.45 eq), aromatic aldehyde (1.0 eq), catalyst and methanol. The mixture was heated at reflux for 16 h. After cooling off, the mixture was filtered and washed with cold methanol to give DHPMs. Reaction solution was further purified by recrystallization with petroleum ether and ethyl acetate. Six catalytic systems, different 1,3-dicarbonyl compounds and different substituted aromatic aldehydes with varied substitutions are described for the Biginelli reaction. An analysis was also performed to study the factors that affect the yield of the reaction. RESULTS When 1,3-dicarbonyl compound was ethyl acetoacetate, the CuCl/ conc.H2SO4 system gave the highest yield (90.5%). While when acetoacetamide was used, the yields of DHPMs in presence of PTSA/conc. HCl, conc. HCl or FeCl3•6H2O were all over 90%. Nine DHPMs with different substituents were obtained. CONCLUSION The Lewis acid or mixed catalyst had no significant advantage over a single protonic acid as catalyst. Conc. HCl as the catalyst was found to be the most effective condition for the preparation of DHPMs. The aromatic aldehyde with weak electron-withdrawing substituent such as Br resulted in the best yield.
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Affiliation(s)
- Zong-Liang Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
| | - Ren-Mei Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
| | - Ye Liu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
| | - Yan Guo
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
| | - Qing-Guo Meng
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, China
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10
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Kuzovlev AS, Volkova DA, Parfenova IV, Kulakov IV, Shkirdova AO, Zamilatskov IA, Chernyshev VV, Rybakov VB, Tyurin VS, Fefilov NN, Vasilchenko AS. Copper( i) halide and palladium( ii) chloride complexes of 4-thioxo[1,3,5]oxadiazocines: synthesis, structure and antibacterial activity. NEW J CHEM 2020. [DOI: 10.1039/c9nj05958j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The first copper(i) and palladium(ii) complexes containing monastrol analogs, 4-thioxo[1,3,5]oxadiazocine derivatives, have been synthesized. The complexes demonstrated significant antibacterial activity in contrast to free heterocyclic thiones.
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11
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Desai NC, Joshi SB, Jadeja KA. A one‐pot multicomponent Biginelli reaction for the preparation of novel pyrimidinthione derivatives as antimicrobial agents. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3821] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nisheeth C. Desai
- Division of Medicinal Chemistry, Department of Chemistry (DST‐FIST Sponsored & UGC NON‐SAP), Mahatma Gandhi CampusMaharaja Krishnakumarsinhji Bhavnagar University Bhavnagar Gujarat India
| | - Surbhi B. Joshi
- Division of Medicinal Chemistry, Department of Chemistry (DST‐FIST Sponsored & UGC NON‐SAP), Mahatma Gandhi CampusMaharaja Krishnakumarsinhji Bhavnagar University Bhavnagar Gujarat India
| | - Krunalsinh A. Jadeja
- Division of Medicinal Chemistry, Department of Chemistry (DST‐FIST Sponsored & UGC NON‐SAP), Mahatma Gandhi CampusMaharaja Krishnakumarsinhji Bhavnagar University Bhavnagar Gujarat India
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12
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Mhiri C, Boubakri L, Ternane R, Mansour L, Harrath AH, Al‐Tamimi J, Baklouti L, Hamdi N. Three‐component, one‐pot synthesis of pyrano[3,2‐c]chromene derivatives catalyzed by ammonium acetate: Synthesis, characterization, cation binding, and biological determination. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chiheb Mhiri
- Laboratory of Applied Chemistry and Natural Substances Resources and Environment, Faculty of SciencesUniversity of Carthage Zarzouna Tunisia
| | - Lamia Boubakri
- Research Laboratory of Environmental Sciences and Technologies (LR16ES09), Higher Institute of Environmental Sciences and TechnologyUniversity of Carthage Hammam‐Lif Tunisia
| | - Riadh Ternane
- Laboratory of Applied Chemistry and Natural Substances Resources and Environment, Faculty of SciencesUniversity of Carthage Zarzouna Tunisia
| | - Lamjed Mansour
- Zoology Department, College of ScienceKing Saud University Riyadh Saudi Arabia
| | - Abdel Halim Harrath
- Zoology Department, College of ScienceKing Saud University Riyadh Saudi Arabia
| | - J. Al‐Tamimi
- Zoology Department, College of ScienceKing Saud University Riyadh Saudi Arabia
| | - Lassaad Baklouti
- Laboratory of Applied Chemistry and Natural Substances Resources and Environment, Faculty of SciencesUniversity of Carthage Zarzouna Tunisia
| | - Naceur Hamdi
- Research Laboratory of Environmental Sciences and Technologies (LR16ES09), Higher Institute of Environmental Sciences and TechnologyUniversity of Carthage Hammam‐Lif Tunisia
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Recent developments in the synthesis and applications of dihydropyrimidin-2(1H)-ones and thiones. Mol Divers 2018; 22:405-446. [PMID: 29349521 DOI: 10.1007/s11030-017-9806-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 12/18/2017] [Indexed: 10/18/2022]
Abstract
Dihydropyrimidin-2(1H)-ones/thiones (DHPMs) are important heterocyclic compounds owing to their excellent biological activities and have been widely utilized in pharmaceutical applications. Recently, numerous DHPM derivatives have been prepared. This review covers the synthesis of DHPMs and improved procedures for the preparation of DHPMs from 1995 to 2016.
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Matos LHS, Masson FT, Simeoni LA, Homem-de-Mello M. Biological activity of dihydropyrimidinone (DHPM) derivatives: A systematic review. Eur J Med Chem 2017; 143:1779-1789. [PMID: 29133039 DOI: 10.1016/j.ejmech.2017.10.073] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 10/23/2017] [Accepted: 10/27/2017] [Indexed: 12/21/2022]
Abstract
Dihydropyrimidinones are heterocycles with a pyrimidine moiety in the ring nucleus, which, in recent decades, have aroused interest in medicinal chemistry due to alleged versatile biological activity. In this systematic review, we describe the currently published activities of dihydropyrimidinone derivatives. Between 1990 and December 31st, 2016, 115 articles outlined biological activities or toxicity of DHPM derivatives, 12 of those involved in vivo experiments. The main activities associated with this class of compounds are antitumoral (43 articles), anti-inflammatory (12 articles), antibacterial (20 articles) and calcium channel antagonism/inhibition (14 articles). Antitumoral activity is the main biological property evaluated, since the main representative compound of this class (monastrol) is a known Eg5 kinesin inhibitor. This review depicts a variety of other pharmacological activities associated with DHPM derivatives, but the main findings are essentially in vitro characteristics of the substances. This review presents the current state of the art of DHPM biological activities and demonstrates that there is still a need for further in vivo studies to better delineate the pharmacological potential of this class of substances.
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Affiliation(s)
| | - Flávia Teixeira Masson
- Department of Pharmaceutical Sciences, Health Sciences School, University of Brasilia, Brazil
| | - Luiz Alberto Simeoni
- Department of Pharmaceutical Sciences, Health Sciences School, University of Brasilia, Brazil
| | - Mauricio Homem-de-Mello
- Department of Pharmaceutical Sciences, Health Sciences School, University of Brasilia, Brazil.
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An Efficient One-Pot Protocol for the Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-ones Using Metallophthalocyanines (MPcs) as Potent Heterogeneous Catalysts: Synthesis, Characterization, Aggregation and Antimicrobial Activity. Molecules 2017; 22:molecules22040605. [PMID: 28397777 PMCID: PMC6154335 DOI: 10.3390/molecules22040605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/15/2017] [Accepted: 03/23/2017] [Indexed: 11/27/2022] Open
Abstract
In this study, novel phthalonitrile 3 and their corresponding metal-free 4 and metallophthalocyanine derivatives 5–7 bearing 2-isopropenyl-4-methoxy-1-methylbenzene groups were synthesized and characterized. 3,4-Dihydropyrimidinones have been synthesized by a modified Biginelli-type reaction with various metallophthalocyanines 5–7 as catalysts. Compared to the classical Biginielli reaction, the new method has the advantages of good yield and short reaction time. Among the various metallophthalocyanines studied, cobalt (II)-phthalocyanine was found to be most active for this transformation. The newly prepared compounds were characterized using elemental analyses, MS, IR, 1H/13C-NMR and UV-Vis spectroscopy. In addition; the 3,4-dihydropyrimidinones (DHPMs) 8–12 were investigated for antimicrobial activities and revealed good activity. The minimum inhibitory concentration (MIC) was determined by the microdilution technique in Mueller-Hinton broth. The MICs were recorded after 24 hours of incubation at 37 °C. These results are promising, showing these compounds are biologically active.
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