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Cui H, Wu Z, Zhang L, Wu D, Hu D, Zhang J. Discovery of Pyrido[1,2-α] Pyrimidinone Mesoionic Compounds as Potential Control Agents Against Potato Virus Y. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:12925-12934. [PMID: 38809684 DOI: 10.1021/acs.jafc.3c09867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Potato virus Y (PVY) relies on aphids and tubers to spread in the field and causes serious economic losses in the potato industry. Here, we found that pyrido[1,2-α] pyrimidinone mesoionic compounds with insecticidal activity against aphids possessed a good inhibitory effect on PVY. Among them, compound 35 had the best inhibitory activity against PVY (EC50 = 104 μg/mL), even superior to that of ningnanmycin (125 μg/mL). The fluorescence and qPCR results confirmed that compound 35 could inhibit the proliferation of PVY in Nicotiana benthamiana. Preliminary experiments on the mechanism of action indicated that compound 35 had good binding affinity with the coat protein (CP), which plays an essential role in aphid-PVY interactions. Molecular docking revealed that compound 35 could bind to the pocket of CP formed by Ser52, Glu204, and Arg208. Compound 35 had substantially lower binding affinity (Kd) values with CPS52A (219 μM), CPE204A (231 μM), and CPR208A (189 μM) than those with CPWT (5.80 μM). A luciferase assay confirmed that mutating Ser52, Glu204, and Arg208 significantly affected the expression level of CP and further reduced virus proliferation. Therefore, the broad-spectrum activity of compound 35 provides a unique strategy for the prevention and treatment of PVY.
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Affiliation(s)
- Honghao Cui
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
- Guizhou Institute of Soil and Fertilizer/Agricultural Resources and Environment, Guizhou Academy of Agricultural Sciences, Huaxi, Guiyang 550025, PR China
| | - Zengxue Wu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
| | - Luoman Zhang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
| | - Duanpu Wu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
| | - Deyu Hu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
| | - Jian Zhang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
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2
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Guo H, Wu S, Song R, Liu T, He S, Song B, Hu D. Discovery of Mesoionic Derivatives Containing a Dithioacetal Skeleton as Novel Potential Antibacterial Agents and Mechanism Research. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:7015-7028. [PMID: 35658411 DOI: 10.1021/acs.jafc.2c01641] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, the design and synthesis of novel pyrido[1,2-a]pyrimidinone mesoionic derivatives incorporating dithioacetal structures were carried out. The three-dimensional quantitative structure-activity relationship (3D-QSAR) model was built according to the EC50 values and directed the synthesis of compound A32. The biological activity test against Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas oryzae pv. oryzicola (Xoc) indicated that compound A32 showed good antibacterial activity with EC50 values of 10.9 and 17.5 mg/L, which were lower than the EC50 values of bismerthiazol (29.3 and 39.8 mg/L) and thiodiazole copper (64.8 and 78.1 mg/L). Furthermore, the in vivo antibacterial activity against bacterial leaf blight (BLB) and bacterial leaf streak (BLS) revealed that the protective activity of compound A32 was 43.9 and 41.7%, respectively, which was better than the protective activity of thiodiazole copper (40.6 and 35.0%). In addition, the protective activity against bacterial leaf blight of compound A32 was associated with the increasing rice defensive enzyme activity and the upregulation of proteins involved in oxidative phosphorylation. Moreover, compound A32 could upregulate the expression of complex I (nicotinamide adenine dinucleotide hydrogen (NADH) dehydrogenase) in the oxidative phosphorylation pathway, which was verified by complex I activity evaluation.
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Affiliation(s)
- Haomo Guo
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Sikai Wu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Runjiang Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Ting Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Siqi He
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Baoan Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Deyu Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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Zhang J, Song R, Wu S, Cai D, Wu Z, Liu Z, Hu D, Song B. Discovery of Pyrido[1,2- a]pyrimidinone Mesoionic Compounds Incorporating a Dithioacetal Moiety as Novel Potential Insecticidal Agents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:15136-15144. [PMID: 34878774 DOI: 10.1021/acs.jafc.1c05823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A series of novel mesoionic pyrido[1,2-a]pyrimidinone compounds incorporating a dithioacetal skeleton were designed and synthesized for use as insecticidal agents. The biological activity of the title compounds indicated good to excellent insecticidal activities against bean aphids (Aphis craccivora) and white-backed planthoppers (Sogatella furcifera). Compound 34 showed excellent insecticidal activity against bean aphids (A. craccivora) with an LC50 value of 2.80 μg/mL, exceeding the insecticidal activity of trifluoropyrimidine (LC50 = 4.20 μg/mL). Proteomics and molecular docking results indicated that compound 34 could act on nicotinic acetylcholine receptors. This study provides support for the application of mesoionic pyrido[1,2-a]pyrimidinone compounds containing dithioacetal as novel insecticidal agents.
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Affiliation(s)
- Jian Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Runjiang Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Shang Wu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Di Cai
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zengxue Wu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhengjun Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Deyu Hu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Baoan Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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4
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Kawase M, Saijo R. The Fascinating Chemistry of Mesoionic 4-Trifluoroacetyl-1,3-oxazolium-5-olates and Related Compounds. HETEROCYCLES 2021. [DOI: 10.3987/rev-21-955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Cherepanov IA, Trankina ES, Frolova NG, Godovikov IA, Lyssenko KA. Unusual sydnones based di- and trisilamacrocycles. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liu D, Zhang J, Zhao L, He W, Liu Z, Gan X, Song B. First Discovery of Novel Pyrido[1,2- a]pyrimidinone Mesoionic Compounds as Antibacterial Agents. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11860-11866. [PMID: 31532652 DOI: 10.1021/acs.jafc.9b03606] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Plant bacterial diseases cause tremendous decreases in crop yield and quality, and there is a lack of highly effective and low-risk antibacterial agents. A series of novel pyrido[1,2-a]pyrimidinone mesoionic compounds containing vanillin moieties were synthesized, and the application of these mesoionic compounds as plant antibacterial agents was reported here for the first time. The bioassay results revealed that the mesoionic compounds had good antibacterial activity. Of these compounds, compound 11 showed excellent in vitro activity against Xanthomonas oryzae pv. oryzae, with an EC50 value of 1.1 μg/mL, which was substantially better than that of bismerthiazol (92.7 μg/mL) and thiodiazole copper (105.4 μg/mL). Moreover, greenhouse condition trials indicated that the protective and curative activities of compound 11 against rice bacterial leaf blight were 75.12 and 72.04%, respectively, which were better than those of bismerthiazol (62.24 and 50.83%, respectively) and thiodiazole copper (53.35 and 65.04%, respectively). These results provide a basis for the application of mesoionic vanillin moieties as new antibacterial agents.
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Affiliation(s)
- Dengyue Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Jian Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Lei Zhao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Wengjing He
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Zhengjun Liu
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Xiuhai Gan
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
| | - Baoan Song
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education , Guizhou University , Huaxi District, Guiyang , Guizhou 550025 , People's Republic of China
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7
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Anticancer Indole-Based Chalcones: A Structural and Theoretical Analysis. Molecules 2019; 24:molecules24203728. [PMID: 31623155 PMCID: PMC6832658 DOI: 10.3390/molecules24203728] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/10/2019] [Accepted: 10/11/2019] [Indexed: 11/21/2022] Open
Abstract
The crystal structures of five new chalcones derived from N-ethyl-3-acetylindole with different substituents were investigated: (E)-3-(4-bromophenyl)-1-(1-ethyl-1H-indol-3-yl)prop-2-en-1-one (3a); (E)-3-(3-bromophenyl)-1-(1-ethyl-1H-indol-3-yl)prop-2-en-1-one (3b); (E)-1-(1-ethyl-1H-indol-3-yl)-3-(4-methoxyphenyl)prop-2-en-1-one (3c); (E)-1-(1-ethyl-1H-indol-3-yl)-3-mesitylprop-2-en-1-one (3d); and (E)-1-(1-ethyl-1H-indol-3-yl)-3-(furan-2-yl)prop-2-en-1-one (3e). The molecular packing of the studied compounds is controlled mainly by C–H⋅⋅⋅O hydrogen bonds, C–H⋅⋅⋅π interactions, and π···π stacking interactions, which were quantitatively analyzed using Hirshfeld topology analysis. Using density functional theory (DFT) calculations, the order of polarity (3b ˂ 3d ˂ 3e ˂ 3a ˂ 3c) was determined. Several chemical reactivity indices such as the ionization potential (I), electron affinity (A), chemical potential (μ), hardness (η), electrophilicity (ω) and nucleophilicity (N) indices were calculated, and these properties are discussed and compared. In addition, the antiproliferative activity of the five new chalcones was studied.
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8
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Badria FA, Atef S, Al‐Majid AM, Ali M, Elshaier YAMM, Ghabbour HA, Islam MS, Barakat A. Synthesis and Inhibitory Effect of Some Indole-Pyrimidine Based Hybrid Heterocycles on α-Glucosidase and α-Amylase as Potential Hypoglycemic Agents. ChemistryOpen 2019; 8:1288-1297. [PMID: 31649838 PMCID: PMC6804419 DOI: 10.1002/open.201900240] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/18/2019] [Indexed: 11/09/2022] Open
Abstract
The Michael addition reaction of barbituric acid with chalcones incorporating the indole scaffold was achieved by using a highly efficient bimetallic Iron-palladium catalyst in the presence of acetylacetone (acac). This catalytic approach produced the desired products in a simple operation and low catalyst loading with acceptable yield of the new hybrids. All tested compounds were subjected for biological activity on α-glucosidase and α-amylase. The results revealed that all synthesized compounds exhibited very good activity against both enzymes when compared to positive control (acarbose). Moreover, compound 5o showed the best activity whereas its IC50 (μM) are 13.02+0.01 and 21.71+0.82 for α-glucosidase and α-amylase respectively. Both compounds 5o and 5l exhibited high similarity in binding mode and pose with amylase protein (4UAC). The obtained data may be used for developing potential hypoglycemic agents.
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Affiliation(s)
- Farid A. Badria
- Department of Pharmacognosy, Faculty of pharmacyMansura UniversityMansura35516Egypt
| | - Saleh Atef
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | | | - M. Ali
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | - Yaseen A. M. M. Elshaier
- Department of Organic and Medicinal chemistry, Faculty of PharmacyUniversity of Sadat CityMenoufiyaEgypt
| | - Hazem A. Ghabbour
- Department of Medicinal Chemistry, Faculty of PharmacyUniversity of MansouraMansoura35516Egypt
| | - Mohammad Shahidul Islam
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
| | - Assem Barakat
- Department of Chemistry, College of ScienceKing Saud UniversityP. O. Box 2455Riyadh11451Saudi Arabia
- Department of Chemistry, Faculty of ScienceAlexandria UniversityP.O. Box 426Ibrahimia, Alexandria21321Egypt
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9
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Mathieu S, Trinquier G. Oxidative addition of carbon dioxide into mesoionics. Phys Chem Chem Phys 2019; 21:5531-5565. [PMID: 30785431 DOI: 10.1039/c8cp07321j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This work examines the prospect of making stable mesoionic compounds of the type mesomeric betaine R+-CO2- from direct oxidative additions of carbon dioxide to suitably-delocalized singlet carbene moieties, with bold objectives of carbon sequestration and overall energy storage. A set of possible candidates for such mesoionic compounds is theoretically explored through DFT calculations, inspecting coupling paths, thermodynamic and kinetic stabilities, and geometric and electronic structural features. Among others, the addressed cationic parts include aromatic rings in their broader sense, phenalene systems, and odd linear polyenic chains. Various structurally-close neutral alternatives such as oxiranones or carbene-acid forms are also considered. In the linear polyenic chain family, there is stark contrast between 4N + 1 and 4N - 1 lengths, with ensuing substantial consequences for stabilities and structures. Amino substitutions can favor mesoionic arrangements through their cation-stabilizing π-donor properties, further supported by possible strong intramolecular hydrogen bonds, but they can also contribute to weaken their kinetic stability through the existence of stable neutral imino alternatives. All in all, mesoionics including tropylium, phenalene, or 4N + 1 odd polyene frames as cationic parts could be reasonable targets.
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Affiliation(s)
- Simon Mathieu
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III), 31062 Toulouse Cedex 4, France.
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10
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Szabo J, Greiner J, Maas G. Derivatives of the triaminoguanidinium ion, 5. Acylation of triaminoguanidines leading to symmetrical tris(acylamino)guanidines and mesoionic 1,2,4-triazolium-3-aminides. Beilstein J Org Chem 2017; 13:579-588. [PMID: 28405238 PMCID: PMC5372706 DOI: 10.3762/bjoc.13.57] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 03/03/2017] [Indexed: 11/23/2022] Open
Abstract
Depending on the reaction conditions, N,N',N''-tris(benzylamino)guanidinium salts can react with carboxylic acid chlorides to form either symmetrical N,N',N''-tris(N-acyl-N-benzylamido)guanidines 6 or mesoionic 4-amino-1,2,4-triazolium-3-hydrazinides 7. The latter were converted into 1,2,4-triazolium salts by protonation or methylation at the hydrazinide nitrogen atom. Neutral 1,2,4-triazoles 10 were obtained by catalytic hydrogenation of an N-benzyl derivative. Crystal structure analyses of a 4-benzylamino-1,2,4-triazolium-3-hydrazinide and of two derived 1,2,4-triazolium salts are presented.
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Affiliation(s)
- Jan Szabo
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Julian Greiner
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | - Gerhard Maas
- Institute of Organic Chemistry I, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
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11
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Wezeman T, Comas-Barceló J, Nieger M, Harrity JPA, Bräse S. Synthesis of aminopyrazoles from sydnones and ynamides. Org Biomol Chem 2017; 15:1575-1579. [DOI: 10.1039/c6ob02518h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Both copper-catalyzed and strain-mediated cycloadditions between ynamides and sydnones allow for a novel synthetic access to aminopyrazoles.
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Affiliation(s)
- T. Wezeman
- Institute of Organic Chemistry (IOC)
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
| | | | - M. Nieger
- Department of Chemistry
- University of Helsinki
- Finland
| | | | - S. Bräse
- Institute of Organic Chemistry (IOC)
- Karlsruhe Institute of Technology (KIT)
- 76131 Karlsruhe
- Germany
- Institute of Toxicology and Genetics (ITG)
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12
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Kawase M, Saijo R, Mori S, Uno H. Synthesis and Crystal Structure of 4-Trifluoroacetyl-3-phenylsydnone. HETEROCYCLES 2017. [DOI: 10.3987/com-17-13802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Vaidya S, Upadhyay A, Singh SK, Gupta T, Tewary S, Langley SK, Walsh JPS, Murray KS, Rajaraman G, Shanmugam M. A synthetic strategy for switching the single ion anisotropy in tetrahedral Co(ii) complexes. Chem Commun (Camb) 2015; 51:3739-42. [DOI: 10.1039/c4cc08305a] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have shown for the first time, by simply exploiting the hard/soft nature of ligands, single ion magnetic anisotropy of Co(ii) tetrahedral complexes can be switched (+ve to −ve orvice versa) rationally.
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Affiliation(s)
- Shefali Vaidya
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Apoorva Upadhyay
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | | | - Tulika Gupta
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | - Subrata Tewary
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
| | | | | | | | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai
- India
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14
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15
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Shahrekipour F, Heydari R, Tahamipour B, Saravani H, Graiff C. Efficient Synthesis of New Stable 1,4-diionic Organosulfurs and Corresponding Mesoionic Compounds from N-Heterocyclic Ylides. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2013.819866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Fahimeh Shahrekipour
- a Department of Chemistry, Faculty of Science , University of Sistan and Balouchestan , Zahedan , Iran
| | - Reza Heydari
- a Department of Chemistry, Faculty of Science , University of Sistan and Balouchestan , Zahedan , Iran
| | | | - Hamideh Saravani
- a Department of Chemistry, Faculty of Science , University of Sistan and Balouchestan , Zahedan , Iran
| | - Claudia Graiff
- c Dipartimento di Chimica , Universitá di Parma , Parma , Italy
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16
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Schindler BD, Jacinto P, Kaatz GW. Inhibition of drug efflux pumps in Staphylococcus aureus: current status of potentiating existing antibiotics. Future Microbiol 2013; 8:491-507. [PMID: 23534361 DOI: 10.2217/fmb.13.16] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The emergence of multidrug-resistant Staphylococcus aureus coupled with a declining output of new antibiotic treatment options from the pharmaceutical industry is a growing worldwide healthcare problem. Multidrug efflux pumps are known to play a role in antibiotic and biocide resistance in S. aureus. These membrane transporters are capable of extruding drugs and other structurally unrelated compounds, hence decreasing intracellular concentration and increasing survival. Coadministration of efflux pump inhibitors (EPIs) with antibiotics that are pump substrates could increase intracellular drug levels, thus bringing renewed efficacy to existing antistaphylococcal agents. Numerous EPIs have been identified or synthesized over the past two decades; these include existing pharmacologic drugs, naturally occurring compounds, and synthetic derivatives thereof. This review describes the current progress in EPI development for use against S. aureus.
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Affiliation(s)
- Bryan D Schindler
- John D Dingell Veterans Affairs Medical Center, Wayne State University, Detroit, MI 48201, USA
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17
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Akdag A, Havlas Z, Michl J. Search for a small chromophore with efficient singlet fission: biradicaloid heterocycles. J Am Chem Soc 2012; 134:14624-31. [PMID: 22876879 DOI: 10.1021/ja3063327] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Of the five small biradicaloid heterocycles whose S(1), S(2), T(1), and T(2) adiabatic excitation energies were examined by the CASPT2/ANO-L-VTZP method, two have been found to meet the state energy criterion for efficient singlet fission and are recommended to the attention of synthetic chemists and photophysicists.
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Affiliation(s)
- Akin Akdag
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 16110 Prague 2, Flemingovo nám. 2, Czech Republic
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Soares de Oliveira C, dos Santos Falcão-Silva V, Siqueira-Júnior JP, Harding DP, Lira BF, Lorenzo JGF, Barbosa-Filho JM, Filgueiras de Athayde-Filho P. Drug resistance modulation in Staphylococcus aureus, a new biological activity for mesoionic hydrochloride compounds. Molecules 2011; 16:2023-31. [PMID: 21358591 PMCID: PMC6259633 DOI: 10.3390/molecules16032023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 02/19/2011] [Accepted: 02/22/2011] [Indexed: 11/24/2022] Open
Abstract
Two salts of the mesoionic compounds 1,4-diphenyl-5-(5-nitro-2-furanyl)-1,3,4-thiadiazolium-2-thiol chloride (MC-1) and 4-phenyl-5-(5-nitro-2-furanyl)-1,3,4-thiadiazolium-2-phenylamine chloride (MC-2) were synthesized utilizing 1,4-diphenyl-thiosemicarbazide and 5-nitro-2-furoyl chloride as starting materials. Their structures were characterized by IR, 1H-NMR, 13C-NMR and elemental analysis. These compounds were analyzed for their influence on the effectiveness of norfloxacin, tetracycline, and erythromycin (standard antibiotics) against resistant strains of Staphylococcus aureus.MC-1 and MC-2, at sub-inhibitory concentrations of 16 μg/mL, favourably modulated the antibiotic activity of tetracycline by 16- and 32-fold, respectively (MIC), and that of erythromycin by 4-fold.
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Affiliation(s)
- Cledualdo Soares de Oliveira
- Department of Chemistry, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (C.S.D.O.); (D.P.H.); (B.F.L.)
| | - Vivyanne dos Santos Falcão-Silva
- Department of Molecular Biology, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (J.P.S.-J.); (V.D.S.F.-S.)
| | - José Pinto Siqueira-Júnior
- Department of Molecular Biology, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (J.P.S.-J.); (V.D.S.F.-S.)
| | - David Peter Harding
- Department of Chemistry, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (C.S.D.O.); (D.P.H.); (B.F.L.)
| | - Bruno Freitas Lira
- Department of Chemistry, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (C.S.D.O.); (D.P.H.); (B.F.L.)
| | - Jorge Gonçalo Fernandes Lorenzo
- Laboratory of Pharmaceutical Technology, Federal University of Paraíba, 58051, João Pessoa, PB, Brazil; E-Mails: (J.G.F.L.); (J.M.B.-F.)
| | - José Maria Barbosa-Filho
- Laboratory of Pharmaceutical Technology, Federal University of Paraíba, 58051, João Pessoa, PB, Brazil; E-Mails: (J.G.F.L.); (J.M.B.-F.)
| | - Petrônio Filgueiras de Athayde-Filho
- Department of Chemistry, Federal University of Paraíba, 58059, João Pessoa, PB, Brazil; E-Mails: (C.S.D.O.); (D.P.H.); (B.F.L.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +55-83-3216-7937
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