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Castro-Godoy WD, Heredia AA, Bouchet LM, Argüello JE. Synthesis of Selenium Derivatives using Organic Selenocyanates as Masked Selenols: Chemical Reduction with Rongalite as a Simpler Tool to give Nucleophilic Selenides. Chempluschem 2024; 89:e202400183. [PMID: 38648466 DOI: 10.1002/cplu.202400183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/10/2024] [Accepted: 04/22/2024] [Indexed: 04/25/2024]
Abstract
The chemical reduction within a family of organic selenocyanates, as masked selenols, using reducing agents, such as Rongalite, sodium dithionite, and sodium thiosulfate is investigated. Using Rongalite, the corresponding diselenides were obtained quantitatively and selectively in very good to excellent yields (51-100 %) starting from alkyl, aryl, and benzyl selenocyanates. The scope of the reaction is unaffected by the electronic nature of the substituents. Furthermore, the reducing agent, Rongalite, is compatible with hydrolysable and reducing-sensitive functional groups. Additionally, a simple methodology employing the in-situ generated benzyl selenolate anion (PhCH2Se-) to promote aliphatic nucleophilic substitution, epoxide ring opening, and Michael addition reactions has been developed; thus, extending the structural diversity of the synthesized selenium derivatives.
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Affiliation(s)
- Willber D Castro-Godoy
- Dpto. de Química, Física y Matemática, Facultad de Química y Farmacia, Universidad de El Salvador, Final Av. de Mártires y Héroes del 30 de Julio, San, Salvador, 1101, El Salvador
| | - Adrián A Heredia
- INFIQC-CONICET-UNC, Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Lydia M Bouchet
- INFIQC-CONICET-UNC, Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
| | - Juan E Argüello
- INFIQC-CONICET-UNC, Dpto. de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina
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2
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Anghinoni JM, Ferreira SS, Piquini PC, Iglesias BA, Perin G, Penteado F, Lenardão EJ. Visible Light and Triselenium Dicyanide (TSD): New Horizons in the Synthesis of Organic Selenocyanates. Chemistry 2023; 29:e202301934. [PMID: 37544915 DOI: 10.1002/chem.202301934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/24/2023] [Accepted: 08/06/2023] [Indexed: 08/08/2023]
Abstract
Herein, we describe a new method for the synthesis of α-carbonyl selenocyanates by reacting triselenium dicyanide (TSD) and styrenes under blue light irradiation and O2 atmosphere. The reactions are triggered by the formation of Se-centered radical species, followed by the addition/oxidation of the styrene π-bond. α-Carbonyl selenocyanates and α-hydroxy selenocyanates were obtained in moderate to excellent yields from aryl- and alkyl-substituted alkenes, respectively. It was demonstrated that α-carbonyl selenocyanates could be used as a synthetic platform in a multicomponent reaction strategy to prepare 2-phenylimidazo[1,2-a]pyridine derivatives, which were evaluated for their photophysical properties. Overall, this new method provides a useful tool for synthesizing α-carbonyl selenocyanates, and demonstrates their potential for use in the synthesis of other compounds, thus giving new synthetic opportunities to construct organic selenocyanate compounds.
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Affiliation(s)
- João M Anghinoni
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA, Universidade Federal de Pelotas - UFPel, P. O. box 354, 96010-900, Pelotas, RS, Brazil
| | - Sabrina S Ferreira
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA, Universidade Federal de Pelotas - UFPel, P. O. box 354, 96010-900, Pelotas, RS, Brazil
| | - Paulo C Piquini
- Departamento de Física, Universidade Federal de Santa Maria, Av. Roraima, Building 13, 97105-900, Santa Maria, RS, Brazil
| | - Bernardo A Iglesias
- Departamento de Química, Universidade Federal de Santa Maria, Av. Roraima, Building 18, 97105-340, Santa Maria, RS, Brazil
| | - Gelson Perin
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA, Universidade Federal de Pelotas - UFPel, P. O. box 354, 96010-900, Pelotas, RS, Brazil
| | - Filipe Penteado
- Departamento de Química, Universidade Federal de Santa Maria, Av. Roraima, Building 18, 97105-340, Santa Maria, RS, Brazil
| | - Eder J Lenardão
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos - CCQFA, Universidade Federal de Pelotas - UFPel, P. O. box 354, 96010-900, Pelotas, RS, Brazil
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Ángel AYB, Campos PRO, Alberto EE. Selenonium Salt as a Catalyst for Nucleophilic Substitution Reactions in Water: Synthesis of Thiocyanites and Selenocyanates. Molecules 2023; 28:molecules28073056. [PMID: 37049818 PMCID: PMC10095699 DOI: 10.3390/molecules28073056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 03/24/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023] Open
Abstract
Organothiocyanates and selenocyanates are valuable compounds, both in terms of functional group interconversion and due to their biological activities. In this contribution, we report the synthesis of a series of these important substances in a mixture of water and dimethyl carbonate (20/1 proportion) using potassium thio- or selenocyanates salts and organic bromides. The key to the effectiveness of the reaction is a chalcogen bond interaction between a selenonium salt catalyst and the organic substrate.
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Santana Filho PC, Brasil da Silva M, Malaquias da Silva BN, Fazolo T, Dorneles GP, Braun de Azeredo J, Alf da Rosa M, Rodrigues Júnior LC, Peres A, Santos Canto RF, Torres Romão PR. Seleno-indoles trigger reactive oxygen species and mitochondrial dysfunction in Leishmania amazonensis. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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Sarfraz M, Nasim MJ, Gruhlke MCH, Handzlik J, Jacob C. To Cut the Mustard: Antimicrobial Activity of Selenocyanates on the Plate and in the Gas Phase. Antibiotics (Basel) 2023; 12:antibiotics12020290. [PMID: 36830201 PMCID: PMC9952309 DOI: 10.3390/antibiotics12020290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/26/2023] [Accepted: 01/28/2023] [Indexed: 02/04/2023] Open
Abstract
Organic selenocyanates (RSeCN) are among the most reactive and biologically active Se species, often exhibiting a pronounced cytotoxic activity against mammalian cells and microorganisms. Various aromatic selenocyanates have been synthesized and, similar to some of the most Reactive Sulfur Species (RSS), such as allicin, found to be active against a range of bacteria, including Escherichia coli, Pseudomonas syringae and Micrococcus luteus, and fungi, including Verticillium dahlia, Verticillium longisporum, Alternaria brassicicola, and Botrytis cinerea, even via the gas phase. The highest antimicrobial activity has been observed for benzyl selenocyanate, which inhibited the growth of all bacteria considerably, even at the lowest tested concentration of 50 µM. Notably, neither the analogues thiocyanate (BTC) nor isothiocyanate (BITC) show any of these activities, rendering this selenium motif rather special in activity and mode of action. Eventually, these findings advocate a range of potential applications of organic selenocyanates in medicine and agriculture.
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Affiliation(s)
- Muhammad Sarfraz
- Department of Plant Physiology, RWTH Aachen University, Worringer Weg 1, 52056 Aachen, Germany
- Division of Bioorganic Chemistry, Saarland University, Campus B2 1, 66123 Saarbruecken, Germany
| | - Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, Saarland University, Campus B2 1, 66123 Saarbruecken, Germany
- Correspondence: (M.J.N.); (C.J.); Tel.: +49-681-302-57335 (M.J.N.); +49-681-302-3129 (C.J.)
| | - Martin C. H. Gruhlke
- Department of Plant Physiology, RWTH Aachen University, Worringer Weg 1, 52056 Aachen, Germany
| | - Jadwiga Handzlik
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University Medical College in Kraków, Medyczna 9, 30-688 Cracow, Poland
| | - Claus Jacob
- Division of Bioorganic Chemistry, Saarland University, Campus B2 1, 66123 Saarbruecken, Germany
- Correspondence: (M.J.N.); (C.J.); Tel.: +49-681-302-57335 (M.J.N.); +49-681-302-3129 (C.J.)
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Castro‐Godoy WD, Bouchet LM, Puiatti M, Schmidt LC, Argüello JE. Purpurin‐Promoted Photo‐Redox Reduction of Benzyl Selenocyanates as Masked Selenols, Preparative, Electrochemical, Computational, and Mechanistic Study. ChemistrySelect 2022. [DOI: 10.1002/slct.202204061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Willber D. Castro‐Godoy
- CENSALUD-UES Dpto. de Química Física y Matemática Facultad de Química y Farmacia Universidad de El Salvador Final Av. de Mártires y Héroes del 30 de Julio, San Salvador 1101 El Salvador
| | - Lydia M. Bouchet
- INFIQC-CONICET-UNC Dpto. de Química Orgánica Facultad de Ciencias Químicas Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Marcelo Puiatti
- INFIQC-CONICET-UNC Dpto. de Química Orgánica Facultad de Ciencias Químicas Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Luciana C. Schmidt
- INFIQC-CONICET-UNC Dpto. de Química Orgánica Facultad de Ciencias Químicas Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA Córdoba Argentina
| | - Juan E. Argüello
- INFIQC-CONICET-UNC Dpto. de Química Orgánica Facultad de Ciencias Químicas Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA Córdoba Argentina
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Ramos-Inza S, Henriquez-Figuereo A, Moreno E, Berzosa M, Encío I, Plano D, Sanmartín C. Unveiling a New Selenocyanate as a Multitarget Candidate with Anticancer, Antileishmanial and Antibacterial Potential. Molecules 2022; 27:7477. [PMID: 36364304 PMCID: PMC9656702 DOI: 10.3390/molecules27217477] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 10/28/2022] [Indexed: 09/02/2023] Open
Abstract
Currently, cancer, leishmaniasis and bacterial infections represent a serious public health burden worldwide. Six cinnamyl and benzodioxyl derivatives incorporating selenium (Se) as selenocyanate, diselenide, or selenide were designed and synthesized through a nucleophilic substitution and/or a reduction using hydrides. Ferrocene was also incorporated by a Friedel–Crafts acylation. All the compounds were screened in vitro for their antiproliferative, antileishmanial, and antibacterial properties. Their capacity to scavenge free radicals was also assessed as a first approach to test their antioxidant activity. Benzodioxyl derivatives 2a –b showed cytotoxicity against colon (HT-29) and lung (H1299) cancer cell lines, with IC50 values below 12 µM, and were also fairly selective when tested in nonmalignant cells. Selenocyanate compounds 1 –2a displayed potent antileishmanial activity in L. major and L. infantum , with IC50 values below 5 µM. They also exhibited antibacterial activity in six bacterial strains, notably in S. epidermidis with MIC and MBC values of 12.5 µg/mL. Ferrocene-containing selenide 2c was also identified as a potent antileishmanial agent with radical scavenging activity. Remarkably, derivative 2a with a selenocyanate moiety was found to act as a multitarget compound with antiproliferative, leishmanicidal, and antibacterial activities. Thus, the current work showed that 2a could be an appealing scaffold to design potential therapeutic drugs for multiple pathologies.
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Affiliation(s)
- Sandra Ramos-Inza
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Irunlarrea 3, E-31008 Pamplona, Spain
| | - Andreina Henriquez-Figuereo
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Institute of Tropical Health of the University of Navarra (ISTUN), University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
| | - Esther Moreno
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Irunlarrea 3, E-31008 Pamplona, Spain
- Institute of Tropical Health of the University of Navarra (ISTUN), University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
| | - Melibea Berzosa
- Institute of Tropical Health of the University of Navarra (ISTUN), University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Department of Microbiology and Parasitology, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
| | - Ignacio Encío
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Irunlarrea 3, E-31008 Pamplona, Spain
- Department of Health Sciences, Public University of Navarra, Avda. Barañain s/n, E-31008 Pamplona, Spain
| | - Daniel Plano
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Irunlarrea 3, E-31008 Pamplona, Spain
- Institute of Tropical Health of the University of Navarra (ISTUN), University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
| | - Carmen Sanmartín
- Department of Pharmaceutical Technology and Chemistry, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), Irunlarrea 3, E-31008 Pamplona, Spain
- Institute of Tropical Health of the University of Navarra (ISTUN), University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
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Karmaker PG, huo F. Organic Selenocyanates: Rapid Advancements and Applications in the Field of Organic Chemistry. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pran Gopal Karmaker
- Neijiang Normal University Chemistry & Chemical Engineering 705#, Dongtong Road, Neijiang, China, 641100Neijiang Normal University 641100 Neijiang CHINA
| | - feng huo
- Neijiang Normal University Chemistry Dongtong Rood #705 641100 Neijiang CHINA
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Chemoselective Preparation of New Families of Phenolic-Organoselenium Hybrids-A Biological Assessment. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041315. [PMID: 35209105 PMCID: PMC8875169 DOI: 10.3390/molecules27041315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 12/02/2022]
Abstract
Being aware of the enormous biological potential of organoselenium and polyphenolic compounds, we have accomplished the preparation of novel hybrids, combining both pharmacophores in order to obtain new antioxidant and antiproliferative agents. Three different families have been accessed in a straightforward and chemoselective fashion: carbohydrate-containing N-acylisoselenoureas, N-arylisoselenocarbamates and N-arylselenocarbamates. The nature of the organoselenium framework, number and position of phenolic hydroxyl groups and substituents on the aromatic scaffolds afforded valuable structure–activity relationships for the biological assays accomplished: antioxidant properties (antiradical activity, DNA-protective effects, Glutathione peroxidase (GPx) mimicry) and antiproliferative activity. Regarding the antioxidant activity, selenocarbamates 24–27 behaved as excellent mimetics of GPx in the substoichiometric elimination of H2O2 as a Reactive Oxygen Species (ROS) model. Isoselenocarbamates and particularly their selenocarbamate isomers exhibited potent antiproliferative activity against non-small lung cell lines (A549, SW1573) in the low micromolar range, with similar potency to that shown by the chemotherapeutic agent cisplatin (cis-diaminodichloroplatin, CDDP) and occasionally with more potency than etoposide (VP-16).
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Pharmaceutical and Safety Profile Evaluation of Novel Selenocompounds with Noteworthy Anticancer Activity. Pharmaceutics 2022; 14:pharmaceutics14020367. [PMID: 35214099 PMCID: PMC8875489 DOI: 10.3390/pharmaceutics14020367] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/28/2022] [Accepted: 02/04/2022] [Indexed: 11/17/2022] Open
Abstract
Prior studies have reported the potent and selective cytotoxic, pro-apoptotic, and chemopreventive activities of a cyclic selenoanhydride and of a series of selenoesters. Some of these selenium derivatives demonstrated multidrug resistance (MDR)-reversing activity in different resistant cancer cell lines. Thus, the aim of this study was to evaluate the pharmaceutical and safety profiles of these selected selenocompounds using alternative methods in silico and in vitro. One of the main tasks of this work was to determine both the physicochemical properties and metabolic stability of these selenoesters. The obtained results proved that these tested selenocompounds could become potential candidates for novel and safe anticancer drugs with good ADMET parameters. The most favorable selenocompounds turned out to be the phthalic selenoanhydride (EDA-A6), two ketone-containing selenoesters with a 4-chlorophenyl moiety (EDA-71 and EDA-73), and a symmetrical selenodiester with a pyridine ring and two selenium atoms (EDA-119).
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Korona-Głowniak I, Nitek W, Tejchman W, Żesławska E. Influence of chlorine and methyl substituents and their position on the antimicrobial activities and crystal structures of 4-methyl-1,6-diphenylpyrimidine-2(1H)-selenone derivatives. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2021; 77:649-658. [PMID: 34607988 DOI: 10.1107/s205322962100975x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 09/19/2021] [Indexed: 11/10/2022]
Abstract
Derivatives of 4-methyl-1,6-diphenylpyrimidine-2(1H)-selenone show very strong antimicrobial activity. In order to extend the current knowledge about the features responsible for the biological activity, crystal structure analyses are presented for 4-methyl-1-(2-methylphenyl)-6-phenylpyrimidine-2(1H)-selenone (1), 4-methyl-1-(3-methylphenyl)-6-phenylpyrimidine-2(1H)-selenone (2), 4-methyl-1-(4-methylphenyl)-6-phenylpyrimidine-2(1H)-selenone (3) (all C18H16N2Se) and 1-(4-chlorophenyl)-4-methyl-6-phenylpyrimidine-2(1H)-selenone (4) (C17H13ClN2Se). Furthermore, the antibacterial and antifungal activities of these compounds were evaluated. All the presented derivatives crystallize in the space group P21/c with one molecule in the asymmetric unit. The molecular geometries differ slightly in the mutual orientation of the rings. The packing of molecules in the crystals is dominated by C-H...N and C-H...Se intermolecular interactions. Additionally, in the crystal structure of 4, C-H...Cl intermolecular interactions are observed. The introduction of a methyl or chlorine substituent improves the biological activity, while its position significantly affects biological activity only in case of the chlorine substituent.
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Affiliation(s)
- Izabela Korona-Głowniak
- Medical University of Lublin, Department of Pharmaceutical Microbiology, Chodźki 1, 20-093 Lublin, Poland
| | - Wojciech Nitek
- Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Kraków, Poland
| | - Waldemar Tejchman
- Pedagogical University, Institute of Biology, Podchorążych 2, 30-084 Kraków, Poland
| | - Ewa Żesławska
- Pedagogical University, Institute of Biology, Podchorążych 2, 30-084 Kraków, Poland
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Tiekink ER. Supramolecular aggregation patterns featuring Se⋯N secondary-bonding interactions in mono-nuclear selenium compounds: A comparison with their congeners. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214031] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Bitew A, Mengist A, Belew H, Aschale Y, Reta A. The Prevalence, Antibiotic Resistance Pattern, and Associated Factors of Bacterial Vaginosis Among Women of the Reproductive Age Group from Felege Hiwot Referral Hospital, Ethiopia. Infect Drug Resist 2021; 14:2685-2696. [PMID: 34285521 PMCID: PMC8286113 DOI: 10.2147/idr.s305329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 06/18/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Bacterial vaginosis is an infection of the vagina, which results due to change in the normal balance of vaginal bacteria. The aim of this study was to assess the magnitude and determinants of bacterial vaginosis among women of reproductive age group from Felege Hiwot Referral Hospital. MATERIALS AND METHODS A cross-sectional study was conducted among women during the reproductive period at Felege Hiwot Referral Hospital from September 1, 2019 to October 2020. About 413 vaginal swab samples were collected and examined using the Nugent scoring system and culture. Data were analyzed by SPSS version 25. The odds ratio (OR) was used as a measure of the strength of association and reported with 95% confidence intervals. P-value ≤ 0.05 was considered to be statistically significant. Bivariate and multivariate logistic regression models were used to identify possible associated factors with bacteria causing bacterial vaginosis. RESULTS The overall prevalence of bacteria causing bacterial vaginosis was 39.5%. The predominant bacteria were S. aureus (25.4%), G. vaginalis (22.7%), S. agalactiae (14.1%), and E. coli (13.5%). S. aureus was resistant to erythromycin (69.8%) and trimethoprim/sulfamethoxazole (53.5%); despite this, it was susceptible to ciprofloxacillin (93%), gentamycin (93%), and cefoxitin (90.7%). On the other hand, E. coli was resistant to trimethoprim/sulfamethoxazole (91.3%) and ceftriaxone (63.6%), but was susceptible to ciprofloxacillin (95.5%) and gentamycin (93%). CONCLUSION The high prevalence of bacterial vaginosis was significantly associated with the pH level of the vagina (≥4.5), participant age ≤20, pregnancy, and history of HIV infection. Therefore, early identification of factors leading to bacterial overgrowth on the vagina is very important to protect maternal and child morbidity and mortality.
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Affiliation(s)
- Abebaw Bitew
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Abeba Mengist
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Habtamu Belew
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Yibeltal Aschale
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Alemayehu Reta
- Department of Medical Laboratory Science, College of Medicine and Health Sciences, Debre Markos University, Debre Markos, Ethiopia
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Marpna ID, Wanniang K, Lipon TM, Shangpliang OR, Myrboh B. Selenocyanation of Aryl and Styryl Methyl Ketones in the Presence of Selenium Dioxide and Malononitrile: An Approach for the Synthesis of α-Carbonyl Selenocyanates. J Org Chem 2021; 86:1980-1986. [PMID: 33377776 DOI: 10.1021/acs.joc.0c02630] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A convenient method has been developed for the synthesis of α-carbonyl selenocyanates from aryl methyl ketones/styryl methyl ketones using selenium dioxide as the selenating agent under simple reaction conditions. This reaction has notable advantages over the traditional methods in terms of accessibility and affordability of the starting materials. The method features the interaction of aryl methyl ketones/styryl methyl ketones with selenium dioxide and malononitrile to afford a series of α-carbonyl selenocyanates in moderate to good yields.
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Affiliation(s)
- Ibakyntiew D Marpna
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | | | | | | | - Bekington Myrboh
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
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Goulart TAC, Back DF, Moura E Silva S, Zeni G. Diorganyl Diselenides and Iron(III) Chloride Drive the Regio- and Stereoselectivity in the Selenation of Ynamides. J Org Chem 2021; 86:980-994. [PMID: 33259208 DOI: 10.1021/acs.joc.0c02480] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report here our results on the application of ynamides as substrates in the reactions with diorganyl dichalcogenides and iron(III) chloride to give selectively three different types of compounds: E-α-chloro-β-(organoselenyl)enamides, 4-(organochalcogenyl)oxazolones, and vinyl tosylates. The results reveal that the selectivity in the formation of products was obtained by controlling the functional groups directly bonded to the nitrogen atom of the ynamides. Thus, α-chloro-β-(organoselenyl) enamide derivatives were exclusively obtained when the TsN- and MsN-ynamides were treated with a mixture of diorganyl diselenides (1.0 equiv) and FeCl3 (3.0 equiv) in dichloroethane (DCE, 3 mL), at room temperature. The 4-(organochalcogenyl)oxazolones were selectively obtained with ynamides having an ester group, directly bonded to the nitrogen atom, upon treatment with a solution of FeCl3 (1.5 equiv) and diorganyl dichalcogenides (1.0 equiv) in dichloromethane (3 mL) at room temperature. Finally, vinyl tosylates were obtained from ynamides having an ester group, directly bonded to the nitrogen atom, by reaction with p-toluenesulfonic acid. We also studied the application of the prepared compounds as substrates for Suzuki and Sonogashira cross-coupling reactions.
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Marć MA, Kincses A, Rácz B, Nasim MJ, Sarfraz M, Lázaro-Milla C, Domínguez-Álvarez E, Jacob C, Spengler G, Almendros P. Antimicrobial, Anticancer and Multidrug-Resistant Reversing Activity of Novel Oxygen-, Sulfur- and Selenoflavones and Bioisosteric Analogues. Pharmaceuticals (Basel) 2020; 13:ph13120453. [PMID: 33322409 PMCID: PMC7763008 DOI: 10.3390/ph13120453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 01/16/2023] Open
Abstract
Multidrug resistance of cancer cells to cytotoxic drugs still remains a major obstacle to the success of chemotherapy in cancer treatment. The development of new drug candidates which may serve as P-glycoprotein (P-gp) efflux pump inhibitors is a promising strategy. Selenium analogues of natural products, such as flavonoids, offer an interesting motif from the perspective of drug design. Herein, we report the biological evaluation of novel hybrid compounds, bearing both the flavone core (compounds 1–3) or a bioisosteric analogue core (compounds 4–6) and the triflyl functional group against Gram-positive and Gram-negative bacteria, yeasts, nematodes, and human colonic adenocarcinoma cells. Results show that these flavones and analogues of flavones inhibited the activity of multidrug resistance (MDR) efflux pump ABCB1 (P-glycoprotein, P-gp). Moreover, the results of the rhodamine 123 accumulation assay demonstrated a dose-dependent inhibition of the abovementioned efflux pump. Three compounds (4, 5, and 6) exhibited potent inhibitory activity, much stronger than the positive control, verapamil. Thus, these chalcogen bioisosteric analogues of flavones become an interesting class of compounds which could be considered as P-gp efflux pump inhibitors in the therapy of MDR cancer. Moreover, all the compounds served as promising adjuvants in the cancer treatment, since they exhibited the P-gp efflux pump modulating activity.
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Affiliation(s)
- Małgorzata Anna Marć
- Department of Medical Microbiology and Immunobiology, University of Szeged, H-6720 Szeged, Hungary; (A.K.); (B.R.); (G.S.)
- Correspondence: ; Tel.: +36-62-545-115
| | - Annamária Kincses
- Department of Medical Microbiology and Immunobiology, University of Szeged, H-6720 Szeged, Hungary; (A.K.); (B.R.); (G.S.)
| | - Bálint Rácz
- Department of Medical Microbiology and Immunobiology, University of Szeged, H-6720 Szeged, Hungary; (A.K.); (B.R.); (G.S.)
| | - Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.S.); (C.J.)
| | - Muhammad Sarfraz
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.S.); (C.J.)
| | - Carlos Lázaro-Milla
- Grupo de Lactamas y Heterociclos Bioactivos, Unidad Asociada al CSIC, Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain;
| | - Enrique Domínguez-Álvarez
- Instituto de Química Orgánica General IQOG-CSIC, Consejo Superior de Investigaciones Científicas, Juan de la Cierva 3, 28006 Madrid, Spain; (E.D.-Á.); (P.A.)
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbruecken, Germany; (M.J.N.); (M.S.); (C.J.)
| | - Gabriella Spengler
- Department of Medical Microbiology and Immunobiology, University of Szeged, H-6720 Szeged, Hungary; (A.K.); (B.R.); (G.S.)
| | - Pedro Almendros
- Instituto de Química Orgánica General IQOG-CSIC, Consejo Superior de Investigaciones Científicas, Juan de la Cierva 3, 28006 Madrid, Spain; (E.D.-Á.); (P.A.)
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Bazana LCG, Carvalho ÂR, Silveira GP, S. de Oliveira LF, Teixeira ML, Lopes W, Vainstein MH, Barbosa FAR, Russo TVC, Sá MM, Canto RFS, Fuentefria AM. Allylic Selenocyanates as Antifungal Agents Against Pathogenic
Candida
Species. ChemistrySelect 2020. [DOI: 10.1002/slct.202002170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luana C. G. Bazana
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
| | - Ânderson R. Carvalho
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
| | - Gustavo P. Silveira
- Departamento de Química Orgânica Instituto de Química, UFRGS Avenida Bento Gonçalves 9500 90650-001 Porto Alegre Brazil
| | | | - Mário L. Teixeira
- Laboratório de Pesquisa em Toxicologia e Farmacologia IFC SC 283 -Km 8 89700-000 Concordia Brazil
| | - William Lopes
- Departamento de Biologia Molecular e Biotecnologia UFRGS Avenida Bento Gonçalves 9500 91501-970 Porto Alegre Brazil
| | - Marilene H. Vainstein
- Departamento de Biologia Molecular e Biotecnologia UFRGS Avenida Bento Gonçalves 9500 91501-970 Porto Alegre Brazil
| | - Flavio A. R. Barbosa
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Theo V. C. Russo
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Marcus M. Sá
- Departamento de Química, UFSC Rua Engenheiro Agronômico Andrei Cristian Ferreira 88040-900 Florianópolis Brazil
| | - Rômulo F. S. Canto
- Departamento de Farmacociências UFCSPA Rua Sarmento Leite 287 90050-170 Porto Alegre Brazil
| | - Alexandre M. Fuentefria
- Laboratório de Pesquisa em Micologia Aplicada Faculdade de Farmácia-Anexo 2, UFRGS Rua São Luis 154 90470440 Porto Alegre Brazil
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Gajdács M, Spengler G. The Role of Drug Repurposing in the Development of Novel Antimicrobial Drugs: Non-Antibiotic Pharmacological Agents as Quorum Sensing-Inhibitors. Antibiotics (Basel) 2019; 8:E270. [PMID: 31861228 PMCID: PMC6963710 DOI: 10.3390/antibiotics8040270] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 02/06/2023] Open
Abstract
Background: The emergence of multidrug-resistant organisms (MDROs) is a global public health issue, severely hindering clinicians in administering appropriate antimicrobial therapy. Drug repurposing is a drug development strategy, during which new pharmacological applications are identified for already approved drugs. From the viewpoint of the development of virulence inhibitors, inhibition of quorum sensing (QS) is a promising route because various important features in bacterial physiology and virulence are mediated by QS-dependent gene expression. Methods: Forty-five pharmacological agents, encompassing a wide variety of different chemical structures and mechanisms of action, were tested during our experiments. The antibacterial activity of the compounds was tested using the broth microdilution method. Screening and semi-quantitative assessment of QS-inhibition by the compounds was performed using QS-signal molecule-producing and indicator strains. Results: Fourteen pharmaceutical agents showed antibacterial activity in the tested concentration range, while eight drugs (namely 5-fluorouracil, metamizole-sodium, cisplatin, methotrexate, bleomycin, promethazine, chlorpromazine, and thioridazine) showed dose-dependent QS-inhibitory activity in the in vitro model systems applied during the experiments. Conclusions: Virulence inhibitors represent an attractive alternative strategy to combat bacterial pathogens more efficiently. Some of the tested compounds could be considered potential QS-inhibitory agents, warranting further experiments involving additional model systems to establish the extent of their efficacy.
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Affiliation(s)
- Márió Gajdács
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, Dóm tér 10, 6720 Szeged, Hungary
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, 6720 Szeged, Hungary;
| | - Gabriella Spengler
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6, 6720 Szeged, Hungary;
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Affiliation(s)
- Claus Jacob
- Department of Pharmacy Building B 2.1., Room 1.13 Saarland State University Campus D-66123 Saarbruecken, Germany
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Gajdács M, Urbán E. Resistance Trends and Epidemiology of Citrobacter- Enterobacter- Serratia in Urinary Tract Infections of Inpatients and Outpatients (RECESUTI): A 10-Year Survey. MEDICINA (KAUNAS, LITHUANIA) 2019; 55:E285. [PMID: 31216725 PMCID: PMC6630883 DOI: 10.3390/medicina55060285] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/12/2019] [Accepted: 06/13/2019] [Indexed: 12/17/2022]
Abstract
Background and objectives: Urinary tract infections (UTIs) are the third most common infections in humans, representing a significant factor of morbidity, both among outpatients and inpatients. The pathogenic role of Citrobacter, Enterobacter, and Serratia species (CES bacteria) has been described in UTIs. CES bacteria present a therapeutic challenge due to the various intrinsic and acquired resistance mechanisms they possess. Materials and Methods: The aim of this study was to assess and compare the resistance trends and epidemiology of CES pathogens in UTIs (RECESUTI) in inpatients and outpatients during a 10-year study period. To evaluate the resistance trends of isolated strains, several antibiotics were chosen as indicator drugs based on local utilization data. 578 CES isolates were obtained from inpatients and 554 from outpatients, representing 2.57 ± 0.41% of all positive urine samples for outpatients and 3.02 ± 0.40% for inpatients. E. cloacae was the most prevalent species. Results: The ratio of resistant strains to most of the indicator drugs was higher in the inpatient group and lower in the second half of the study period. ESBL-producing isolates were detected in 0-9.75% from outpatient and 0-29.09% from inpatient samples. Conclusions: Resistance developments of CES bacteria, coupled with their intrinsic non-susceptibility to several antibiotics, severely limits the number of therapeutic alternatives, especially for outpatients.
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Affiliation(s)
- Márió Gajdács
- Department of Pharmacodynamics and Biopharmacy, Faculty of Pharmacy, University of Szeged, Eötvös utca 6., 6720 Szeged, Hungary.
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, Semmelweis utca 6., 6725 Szeged, Hungary.
| | - Edit Urbán
- Institute of Clinical Microbiology, Faculty of Medicine, University of Szeged, Semmelweis utca 6., 6725 Szeged, Hungary.
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The Continuing Threat of Methicillin-Resistant Staphylococcus aureus. Antibiotics (Basel) 2019; 8:antibiotics8020052. [PMID: 31052511 PMCID: PMC6627156 DOI: 10.3390/antibiotics8020052] [Citation(s) in RCA: 165] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/28/2019] [Accepted: 04/29/2019] [Indexed: 02/06/2023] Open
Abstract
Staphylococcus aureus has been an exceptionally successful pathogen, which is still relevant in modern age-medicine due to its adaptability and tenacity. This bacterium may be a causative agent in a plethora of infections, owing to its abundance (in the environment and in the normal flora) and the variety of virulence factors that it possesses. Methicillin-resistant S. aureus (MRSA) strains—first described in 1961—are characterized by an altered penicillin-binding protein (PBP2a/c) and resistance to all penicillins, cephalosporins, and carbapenems, which makes the β-lactam armamentarium clinically ineffective. The acquisition of additional resistance determinants further complicates their eradication; therefore, MRSA can be considered as the first representative of multidrug-resistant bacteria. Based on 230 references, the aim of this review is to recap the history, the emergence, and clinical features of various MRSA infections (hospital-, community-, and livestock-associated), and to summarize the current advances regarding MRSA screening, typing, and therapeutic options (including lipoglycopeptides, oxazolidinones, anti-MRSA cephalosporins, novel pleuromutilin-, tetracycline- and quinolone-derivatives, daptomycin, fusidic acid, in addition to drug candidates in the development phase), both for an audience of clinical microbiologists and infectious disease specialists.
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