1
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Hurtle BT, Jana S, Cai L, Pike VW. Ligand-Based Virtual Screening as a Path to New Chemotypes for Candidate PET Radioligands for Imaging Tauopathies. J Med Chem 2024; 67:14095-14109. [PMID: 39108178 DOI: 10.1021/acs.jmedchem.4c00934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Ligand-based virtual screening (LBVS) has rarely been tested as a method for discovering new structural scaffolds for PET radioligand development. This study used LBVS to discover potential chemotype leads for developing radioligands for PET imaging of tauopathies. ZINC12, a free database of over 12 million commercially available compounds, was searched to discover novel scaffolds based on similarities to four query compounds. Thirteen high-ranking hits were purchased and assayed for their ability to compete against three tritiated radioligands at their distinct binding sites in Alzheimer's disease brain tissue. Three hits were 2-substituted 6-methoxy naphthalenes. Synthetic elaboration of this new chemotype yielded three new ligands (25, 26, and 28) with high affinity for the [3H]6 (flortaucipur) neurofibrillary tangle binding site. Compound 28 showed remarkably high affinity (Ki, 7 nM) and other desirable properties for a candidate PET radioligand, including low topological polar surface area, moderate computed log D, and amenability for labeling with carbon-11. LBVS appears to be uniquely valuable for discovering new chemotypes for candidate PET radioligands.
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Affiliation(s)
- Bryan T Hurtle
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Susovan Jana
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Lisheng Cai
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Victor W Pike
- Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892, United States
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2
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Betcke I, Götzinger AC, Kornet MM, Müller TJJ. Multicomponent syntheses of pyrazoles via (3 + 2)-cyclocondensation and (3 + 2)-cycloaddition key steps. Beilstein J Org Chem 2024; 20:2024-2077. [PMID: 39161713 PMCID: PMC11331544 DOI: 10.3762/bjoc.20.178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 07/19/2024] [Indexed: 08/21/2024] Open
Abstract
Pyrazoles are rarely found in nature but are traditionally used in the agrochemical and pharmaceutical industries, while other areas of use are also actively developing. However, they have also found numerous other applications. The search for new and efficient syntheses of these heterocycles is therefore highly relevant. The modular concept of multicomponent reactions (MCR) has paved a broad alley to heteroaromatics. The advantages over traditional methods are the broader scope and increased efficiency of these reactions. In particular, traditional multistep syntheses of pyrazoles have considerably been extended by MCR. Progress has been made in the cyclocondensation of 1,3-dielectrophiles that are generated in situ. Limitations in the regioselectivity of cyclocondensation with 1,3-dicarbonyls were overcome by the addition-cyclocondensation of α,β-unsaturated ketones. Embedding 1,3-dipolar cycloadditions into a one-pot process has additionally been developed for concise syntheses of pyrazoles. The MCR strategy also allows for concatenating classical condensation-based methodology with modern cross-coupling and radical chemistry, as well as providing versatile synthetic approaches to pyrazoles. This overview summarizes the most important MCR syntheses of pyrazoles based on ring-forming sequences in a flashlight fashion.
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Affiliation(s)
- Ignaz Betcke
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
| | - Alissa C Götzinger
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
| | - Maryna M Kornet
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
- Zaporizhzhia National University, Faculty of Biology, Department of Chemistry, Zhukovskogo Street 66, 69600 Zaporizhzhia, Ukraine
| | - Thomas J J Müller
- Heinrich-Heine-Universität Düsseldorf, Math.-Nat. Fakultät, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstrasse 1, D-40225 Düsseldorf, Germany
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3
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Pattanayak P, Nikhitha S, Halder D, Ghosh B, Chatterjee T. Exploring the impact of trifluoromethyl (-CF 3) functional group on the anti-cancer activity of isoxazole-based molecules: design, synthesis, biological evaluation and molecular docking analysis. RSC Adv 2024; 14:18856-18870. [PMID: 38873543 PMCID: PMC11167338 DOI: 10.1039/d4ra02856b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Accepted: 06/03/2024] [Indexed: 06/15/2024] Open
Abstract
Herein we report the design and synthesis of a series of fully-substituted 4-(trifluoromethyl)isoxazoles and evaluation of their anti-cancer activities against MCF-7, 4T1 and PC-3 cell lines as a proof of concept study. 4-(Trifluoromethyl)isoxazole is a synthetically challenging class of molecules and very few synthetic methods have been developed so far and all of them suffered from several serious limitations. Recently we developed a novel, metal-free, and general synthetic strategy to access synthetically challenging 4-(trifluoromethyl)isoxazoles starting from readily available chalcones using cheap CF3SO2Na as the source of the -CF3 group and multitasking t BuONO as an oxidant as well as the source of N and O and thus we have overcome the limitations of the previous methods. Based on the structure of an isoxazole-based anti-cancer agent, 3-(3,4-dimethoxyphenyl)-5-(thiophen-2-yl)isoxazole 14, we designed a set of 4-(trifluoromethyl)isoxazoles for synthesis and further anti-cancer evaluation. Among various molecules, 3-(3,4-dimethoxyphenyl)-5-(thiophen-2-yl)-4-(trifluoromethyl)isoxazole 2g (IC50 = 2.63 μM) and 3-(thiophen-2-yl)-5-(4-(thiophen-2-yl)-1H-pyrrol-3-yl)-4-(trifluoromethyl)isoxazole 5 (IC50 = 3.09 μM) exhibited the best anti-cancer activity against the human breast cancer cell-lines (MCF-7), 2g being the lead molecule among all. Interestingly, 2g is found to be almost 8 times more active compared to its non-trifluoromethylated analogue, i.e., 3-(3,4-dimethoxyphenyl)-5-(thiophen-2-yl)isoxazole 14 (IC50 = 19.72 μM) which revealed the importance of a 'CF3' moiety in enhancing the anti-cancer activity of 14. Further studies such as apoptosis induction, cell cycle analysis, and nuclear staining revealed an apoptotic cell death mechanism. The in silico molecular docking, induced fit analysis, and ADME studies further supported the effect of a -CF3 moiety on the enhancement of anti-cancer activity of isoxazole-based anti-cancer molecules. Further exploration of the biodistribution and therapeutic efficacy of lead 2gin vivo holds significant promise, positioning it as a potential candidate for anticancer therapy.
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Affiliation(s)
- Paramita Pattanayak
- Department of Chemistry, Birla Institute of Technology and Science, Pilani (BITS Pilani), Hyderabad Campus Jawahar Nagar Hyderabad 500078 Telangana India
| | - Sripathi Nikhitha
- Epigenetic Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (BITS Pilani), Hyderabad Campus Jawahar Nagar Hyderabad 500078 Telangana India
| | - Debojyoti Halder
- Epigenetic Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (BITS Pilani), Hyderabad Campus Jawahar Nagar Hyderabad 500078 Telangana India
| | - Balaram Ghosh
- Epigenetic Research Laboratory, Department of Pharmacy, Birla Institute of Technology and Science, Pilani (BITS Pilani), Hyderabad Campus Jawahar Nagar Hyderabad 500078 Telangana India
| | - Tanmay Chatterjee
- Department of Chemistry, Birla Institute of Technology and Science, Pilani (BITS Pilani), Hyderabad Campus Jawahar Nagar Hyderabad 500078 Telangana India
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4
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Zhao Y, Li X, Homölle SL, Wang B, Ackermann L. Electrochemical assembly of isoxazoles via a four-component domino reaction. Chem Sci 2024; 15:1117-1122. [PMID: 38239685 PMCID: PMC10793645 DOI: 10.1039/d3sc05946d] [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: 11/06/2023] [Accepted: 12/10/2023] [Indexed: 01/22/2024] Open
Abstract
Multicomponent domino reactions via electrochemical annulations have emerged as a robust strategy for the rapid assembly of heterocyclics. Herein, an electrochemical annulation via a [1 + 2 + 1 + 1] four-component domino reaction was accomplished in a user-friendly undivided cell setup to assemble valuable five-membered isoxazole motifs. Our approach is characterized by a high level functional group tolerance and operational simplicity, avoiding the tedious and time-consuming preparation of pre-functionalized substrates. Detailed mechanistic studies were conducted including isotopic labeling, kinetic studies, cyclic voltammetry (CV) analysis, and intermediate characterization, providing support for a radical pathway.
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Affiliation(s)
- Yuanyuan Zhao
- Key Laboratory of Xin'an Medicine of the Ministry of Education, School of Pharmacy, Anhui University of Chinese Medicine Hefei 230038 P. R. China
| | - Xinyue Li
- Key Laboratory of Xin'an Medicine of the Ministry of Education, School of Pharmacy, Anhui University of Chinese Medicine Hefei 230038 P. R. China
| | - Simon L Homölle
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry(WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Bin Wang
- Key Laboratory of Xin'an Medicine of the Ministry of Education, School of Pharmacy, Anhui University of Chinese Medicine Hefei 230038 P. R. China
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry(WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Institute of Pharmaceutical Chemistry, Anhui Academy of Chinese Medicine Hefei 230038 P. R. China
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry(WISCh), Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
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5
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Li J, Hong C, Niu Y, Wang B, Jiang H. Palladium-Catalyzed Cyclization/Alkenylation of Ynone Oximes with Vinylsilanes for the Assembly of Isoxazolyl Vinylsilanes. Chem Asian J 2024:e202301122. [PMID: 38224122 DOI: 10.1002/asia.202301122] [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: 12/18/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 01/16/2024]
Abstract
A palladium-catalyzed cascade cyclization/alkenylation for the assembly of synthetically valuable isoxazolyl vinylsilane derivative has been accomplished. Easily accessible ynone oximes, and available vinylsilane agents were used as the reaction starting materials This protocol features broad substrate scope, good functional group tolerance, and good step- and atom-economy. Remarkably, this approach provides a new approach for the construction of structurally diverse isoxazolyl-containing vinylsilanes with high molecular complexity, showing a promising application in synthetic and pharmaceutical chemistry.
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Affiliation(s)
- Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
- Guangdong Province Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, 512005, Shaoguan, P. R. China
| | - Chenjing Hong
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Yanan Niu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Bowen Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, 510640, Guangzhou, P. R China
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6
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Singh H, Kumar R, Mazumder A. Pyrazoline and Analogs: Substrate-based Synthetic Strategies. Curr Org Synth 2024; 21:823-836. [PMID: 37608650 DOI: 10.2174/1570179421666230822100043] [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: 03/07/2023] [Revised: 06/25/2023] [Accepted: 07/19/2023] [Indexed: 08/24/2023]
Abstract
Among the many reports published on strategies applicable to synthesizing pyrazolines and its analogs, The 1,3-dipolar cycloaddition offers a remarkably wide range of utility. Many 1,3-dipolar cycloaddition reactions used for the synthesis of pyrazolines provide better selectivity, eco-friendly, and less expensive chemical processes. In the presented study, we have reviewed various recently adopted strategies for the synthesis of pyrazoline, which followed the 1,3-dipolar cycloaddition reactions mechanism and classified them based on starting materials such as nitrile imines, diazo compounds, different zwitter ions, chalcones, and isoprene units. The manuscript also focused on the synthesis of pyrazolines starting from Seyferth-Gilbert reagents (SGR) and Psilostachyin (PSH) reagents. We hope this work will help those engaged or have plans to research pyrazoline or its analogs, as synthetic protocols based on starting material are rarely available for pyrazolines. Thus, this article holds a valuable complement to the development of newer pyrazoline and its derivatives.
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Affiliation(s)
- Himanshu Singh
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Rajnish Kumar
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
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7
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Boateng ST, Roy T, Torrey K, Owunna U, Banang-Mbeumi S, Basnet D, Niedda E, Alexander AD, Hage DE, Atchimnaidu S, Nagalo BM, Aryal D, Findley A, Seeram NP, Efimova T, Sechi M, Hill RA, Ma H, Chamcheu JC, Murru S. Synthesis, in silico modelling, and in vitro biological evaluation of substituted pyrazole derivatives as potential anti-skin cancer, anti-tyrosinase, and antioxidant agents. J Enzyme Inhib Med Chem 2023; 38:2205042. [PMID: 37184042 PMCID: PMC10187093 DOI: 10.1080/14756366.2023.2205042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 04/16/2023] [Indexed: 05/16/2023] Open
Abstract
Twenty-five azole compounds (P1-P25) were synthesised using regioselective base-metal catalysed and microwave-assisted approaches, fully characterised by high-resolution mass spectrometry (HRMS), nuclear magnetic resonance (NMR), and infrared spectra (IR) analyses, and evaluated for anticancer, anti-tyrosinase, and anti-oxidant activities in silico and in vitro. P25 exhibited potent anticancer activity against cells of four skin cancer (SC) lines, with selectivity for melanoma (A375, SK-Mel-28) or non-melanoma (A431, SCC-12) SC cells over non-cancerous HaCaT-keratinocytes. Clonogenic, scratch-wound, and immunoblotting assay data were consistent with anti-proliferative results, expression profiling therewith implicating intrinsic and extrinsic apoptosis activation. In a mushroom tyrosinase inhibition assay, P14 was most potent among the compounds (half-maximal inhibitory concentration where 50% of cells are dead, IC50 15.9 μM), with activity greater than arbutin and kojic acid. Also, P6 exhibited noteworthy free radical-scavenging activity. Furthermore, in silico docking and absorption, distribution, metabolism, excretion, and toxicity (ADMET) simulations predicted prominent-phenotypic actives to engage diverse cancer/hyperpigmentation-related targets with relatively high affinities. Altogether, promising early-stage hits were identified - some with multiple activities - warranting further hit-to-lead optimisation chemistry with further biological evaluations, towards identifying new skin-cancer and skin-pigmentation renormalising agents.
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Affiliation(s)
- Samuel T. Boateng
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Tithi Roy
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Kara Torrey
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Uchechi Owunna
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sergette Banang-Mbeumi
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
- School of Nursing and Allied Health Sciences, Louisiana Delta Community College, Monroe, LA, USA
| | - David Basnet
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Eleonora Niedda
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy
| | - Alexis D. Alexander
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Denzel El Hage
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Siriki Atchimnaidu
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Bolni Marius Nagalo
- Department of Pathology, University of Arkansas for Medical Sciences (UAMS), Little Rock, AR, USA
- The Winthrop P. Rockefeller Cancer Institute, UAMS, Little Rock, AR, USA
| | - Dinesh Aryal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
- Department of Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, Monroe, LA, USA
| | - Ann Findley
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Navindra P. Seeram
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Tatiana Efimova
- Department of Biomedical Engineering, Northwestern University, Chicago, IL, USA
| | - Mario Sechi
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy
| | - Ronald A. Hill
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Hang Ma
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Jean Christopher Chamcheu
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Siva Murru
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
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8
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Kumar R, Singh H, Mazumder A, Yadav RK. Synthetic Approaches, Biological Activities, and Structure-Activity Relationship of Pyrazolines and Related Derivatives. Top Curr Chem (Cham) 2023; 381:12. [PMID: 37029841 DOI: 10.1007/s41061-023-00422-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 03/22/2023] [Indexed: 04/09/2023]
Abstract
It has been established that pyrazolines and their analogs are pharmacologically active scaffolds. The pyrazoline moiety is present in several marketed molecules with a wide range of uses, which has established its importance in pharmaceutical and agricultural sectors, as well as in industry. Due to its broad-spectrum utility, scientists are continuously captivated by pyrazolines and their derivatives to study their chemistry. Pyrazolines or their analogs can be prepared by several synthesis strategies, and the focus will always be on new greener and more economical ways for their synthesis. Among these methods, chalcones, hydrazines, diazo compounds, and hydrazones are most commonly applied under different reaction conditions for the synthesis of pyrazoline and its analogs. However, there is scope for other molecules such as Huisgen zwitterions, different metal catalysts, and nitrile imine to be used as starting reagents. The present article consists of recently reported synthetic protocols, pharmacological activities, and the structure-activity relationship of pyrazoline and its derivatives, which will be very useful to researchers.
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Affiliation(s)
- Rajnish Kumar
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India.
| | - Himanshu Singh
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Avijit Mazumder
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
| | - Ranjeet Kumar Yadav
- Department of Pharmaceutical Chemistry, Noida Institute of Engineering and Technology (Pharmacy Institute), Greater Noida, India
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9
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García-García Á, de Julián-Ortiz JV, Gálvez J, Font D, Ayats C, Guna Serrano MDR, Muñoz-Collado C, Borrás R, Villalgordo JM. Similarity-Based Virtual Screening to Find Antituberculosis Agents Based on Novel Scaffolds: Design, Syntheses and Pharmacological Assays. Int J Mol Sci 2022; 23:ijms232315057. [PMID: 36499384 PMCID: PMC9737236 DOI: 10.3390/ijms232315057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/02/2022] [Accepted: 11/22/2022] [Indexed: 12/04/2022] Open
Abstract
A method to identify molecular scaffolds potentially active against the Mycobacterium tuberculosis complex (MTBC) is developed. A set of structurally heterogeneous agents against MTBC was used to obtain a mathematical model based on topological descriptors. This model was statistically validated through a Leave-n-Out test. It successfully discriminated between active or inactive compounds over 86% in database sets. It was also useful to select new potential antituberculosis compounds in external databases. The selection of new substituted pyrimidines, pyrimidones and triazolo[1,5-a]pyrimidines was particularly interesting because these structures could provide new scaffolds in this field. The seven selected candidates were synthesized and six of them showed activity in vitro.
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Affiliation(s)
- Ángela García-García
- Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia, Universitat de València, 46100 Burjassot, Spain
| | - Jesus Vicente de Julián-Ortiz
- Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia, Universitat de València, 46100 Burjassot, Spain
- Correspondence:
| | - Jorge Gálvez
- Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia, Universitat de València, 46100 Burjassot, Spain
| | - David Font
- Departamento de Química, Universitat de Girona, 17071 Girona, Spain
| | - Carles Ayats
- Departamento de Química, Universitat de Girona, 17071 Girona, Spain
| | - María del Remedio Guna Serrano
- Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia, Universitat de València, 46100 Burjassot, Spain
- Departamento de Microbiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain
| | - Carlos Muñoz-Collado
- Departamento de Microbiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain
| | - Rafael Borrás
- Departamento de Microbiología, Facultad de Medicina y Odontología, Universitat de València, 46010 València, Spain
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10
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Benarjee V, Saritha B, Hari Gangadhar K, Sailaja B. Synthesis of some new 1,4-benzoxazine-pyrazoles in water as EGFR targeting anticancer agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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11
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Chen L, Wang Z, Liu H, Li X, Wang B. tert-Butyl nitrite triggered radical cascade reaction for synthesizing isoxazoles by a one-pot multicomponent strategy. Chem Commun (Camb) 2022; 58:9152-9155. [PMID: 35894608 DOI: 10.1039/d2cc02823a] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A metal-free radical cyclization/dehydrogenation cascade of alkenes with aldehydes has been developed for the synthesis of 3,5-disubstituted isoxazoles in a one-pot system. This protocol features excellent functional group tolerance and operational simplicity, and is easily scaled up. The radical process is well supported by TEMPO-adducts and the intermediate β-carbonyl ketoxime.
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Affiliation(s)
- Leijing Chen
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, 230038, P. R. China.
| | - Zhen Wang
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, 230038, P. R. China.
| | - Hui Liu
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, 230038, P. R. China.
| | - Xinyue Li
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, 230038, P. R. China.
| | - Bin Wang
- Key Laboratory of Xin'an Medicine of the Ministry of Education, Anhui University of Chinese Medicine, Hefei, 230038, P. R. China. .,Institute of Pharmaceutical Chemistry, Anhui Academy of Chinese Medicine, Hefei, 230038, P. R. China
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12
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Farooq S, Ngaini Z. Synthesis of Benzalacetophenone Based Isoxazoline and Isoxazole Derivatives. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220408120350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
The demand for natural product based drugs with less cost and efficient procedures has become a challenge to researchers. Benzalacetophenone is a natural product based species that is modified into numerous heterocyclic compounds including isoxazoline and isoxazole derivatives. The utility of isoxazoline and oxazole derivatives has been increased for the synthesis of the new and effective chemical entities to serve medicinal chemistry in the past few years. Isoxazoline and isoxazole are fascinating classes of heterocyclic compounds, which belong to N- and O-heterocycles, and are widely used as precursors for the development of drugs. This review highlights the recent work for the synthesis of mono and bis isoxazoline and isoxazole derivatives using stable benzalacetophenone and functionalization of isoxazoline and isoxazole, along with the prevailing biological properties.
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Affiliation(s)
- Saba Farooq
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
| | - Zainab Ngaini
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
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13
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Bhardwaj S, Bendi A, Singh L. A Study on Synthesis of Chalcone Derived -5- Membered Isoxazoline and Isoxazole Scaffolds. Curr Org Synth 2022; 19:643-663. [PMID: 35086450 DOI: 10.2174/1570179419666220127143141] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/05/2021] [Accepted: 11/12/2021] [Indexed: 11/22/2022]
Abstract
Chalcone-derived Isoxazole scaffolds remain the central focus because of their greater biological, clinical, and pharmacological properties. The present study reviews the synthesis of various chalcone derived - 5- Membered Isoxazoline and Isoxazole Scaffolds with the available literature until 2021. Keywords: Chalcones, Isoxazoles, Isoxazolines, Biological and Pharmacological properties.
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Affiliation(s)
- Sakshi Bhardwaj
- Department of Chemistry, Faculty of Science, Shree Guru Gobind Singh Tricentenary University, Gurugram- 122505, Haryana, India
| | - Anjaneyulu Bendi
- Department of Chemistry, Faculty of Science, Shree Guru Gobind Singh Tricentenary University, Gurugram- 122505, Haryana, India
| | - Lakhwinder Singh
- Department of Chemistry, Faculty of Science, Shree Guru Gobind Singh Tricentenary University, Gurugram- 122505, Haryana, India
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14
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Xu Y, Wu Z, Wu X, Zhu C. Transition-Metal Free Radical-Mediated C—H Bond Alkynylation and Allylation of Ethers, Aldehydes and Amides. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202207014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Chen Y, Zhang D, Sun M, Ding Z. Divergent synthesis of isoxazoles and 6 H-1,2-oxazines via hypervalent iodine-mediated intramolecular oxygenation of alkenes. NEW J CHEM 2022. [DOI: 10.1039/d1nj05922j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fluoro benziodoxole reagent was used for the intramolecular cyclization of β,γ-unsaturated oximes to form five- or six-membered ring products.
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Affiliation(s)
- Yuhang Chen
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Dingcheng Zhang
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Mingze Sun
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Zhenhua Ding
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
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16
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Wang Q, Hong G, Tang Z, Yang P, Zhong Y, Gong Y, Wang L. Divergent Synthesis of 3,5‐disubstituted Pyrazoles and α, β‐alkynic hydrazone from Diarylpropynones and Carbazates. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qi Wang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Gang Hong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Zhicong Tang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Peng Yang
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yi Zhong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Yu Gong
- East China University of Science and Technology School of Chemistry and Molecular Engineering School of Chemistry and Molecular Engineering CHINA
| | - Limin Wang
- East China University of Science and Technology School of Chemical and Molecular Engineering 130 Meilong Road 200237 Shanghai CHINA
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17
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Vital theoretical and inter molecular docking study of (E)-3-[(2,6-dimethylphenyl)diazenyl]-7-methyl-1H-indazole. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Chen F, Zhu C, Yang Z, Liu C, Zeng H, Wu W, Jiang H. C–H Amination Enabled [2+1+1+1] Annulation Reaction in Water: Access to Benzoxazoles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100942] [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)
- Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Zhiyi Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Chi Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Hao Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 P. R. China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 P. R. China
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19
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Bhuyan P, Saikia L. Base promoted
CuFe
2
O
4
catalyzed one‐pot synthesis of 3,
5‐diaryl‐1
H
‐pyrazoles. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pubanita Bhuyan
- Department of Chemistry Rajiv Gandhi University Doimukh India
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20
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Cheremnykh KP, Savelyev VA, Shults EE. An Efficient Access to 3,5‐Disubstituted Isoxazoles with Anthranilate Ester Moiety: Alkaloid Lappaconitine – Aryl Conjugates with an Isoxazole Linker. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kirill P. Cheremnykh
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
| | - Victor A. Savelyev
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
| | - Elvira E. Shults
- Laboratory of Medicinal Chemistry Novosibirsk institute of Organic Chemistry Lavrentyev Ave 9 630090 Novosibirsk Russian Federation
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21
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Ramadan M, Aly AA, El-Haleem LEA, Alshammari MB, Bräse S. Substituted Pyrazoles and Their Heteroannulated Analogs-Recent Syntheses and Biological Activities. Molecules 2021; 26:4995. [PMID: 34443583 PMCID: PMC8401439 DOI: 10.3390/molecules26164995] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 02/06/2023] Open
Abstract
Pyrazoles are considered privileged scaffolds in medicinal chemistry. Previous reviews have discussed the importance of pyrazoles and their biological activities; however, few have dealt with the chemistry and the biology of heteroannulated derivatives. Therefore, we focused our attention on recent topics, up until 2020, for the synthesis of pyrazoles, their heteroannulated derivatives, and their applications as biologically active moieties. Moreover, we focused on traditional procedures used in the synthesis of pyrazoles.
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Affiliation(s)
- Mohamed Ramadan
- Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assuit 71524, Egypt;
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | | | - Mohammed B. Alshammari
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 83, Al-Kharij 11942, Saudi Arabia;
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
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22
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Chen F, Zhu C, Jiang H. [3+1+1] Annulation Reaction of Benzo‐1,2‐Quinones, Aldehydes and Hydroxylamine Hydrochloride: Access to Benzoxazoles with Inorganic Nitrogen Source. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fulin Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Chuanle Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University) Lanzhou 730000 People's Republic of China
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23
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Pyrazole Scaffold Synthesis, Functionalization, and Applications in Alzheimer's Disease and Parkinson's Disease Treatment (2011-2020). Molecules 2021; 26:molecules26051202. [PMID: 33668128 PMCID: PMC7956461 DOI: 10.3390/molecules26051202] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 11/17/2022] Open
Abstract
The remarkable prevalence of pyrazole scaffolds in a versatile array of bioactive molecules ranging from apixaban, an anticoagulant used to treat and prevent blood clots and stroke, to bixafen, a pyrazole-carboxamide fungicide used to control diseases of rapeseed and cereal plants, has encouraged both medicinal and organic chemists to explore new methods in developing pyrazole-containing compounds for different applications. Although numerous synthetic strategies have been developed in the last 10 years, there has not been a comprehensive overview of synthesis and the implication of recent advances for treating neurodegenerative disease. This review first presents the advances in pyrazole scaffold synthesis and their functionalization that have been published during the last decade (2011-2020). We then narrow the focus to the application of these strategies in the development of therapeutics for neurodegenerative diseases, particularly for Alzheimer's disease (AD) and Parkinson's disease (PD).
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24
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Wang L, Tao Y, Zhang N, Li S. Convenient synthesis of 4,5-unsubstituted 3-aroylisoxazoles from methyl aryl ketones and (vinylsulfonyl)benzene in water. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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25
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Pajkert R, Koroniak H, Kafarski P, Röschenthaler GV. Hypervalent-iodine mediated one-pot synthesis of isoxazolines and isoxazoles bearing a difluoromethyl phosphonate moiety. Org Biomol Chem 2021; 19:4871-4876. [PMID: 34002761 DOI: 10.1039/d1ob00685a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A one-pot, regioselective 1,3-dipolar cycloaddition of in situ generated (diethoxyphosphoryl)difluoromethyl nitrile oxide toward selected alkenes and alkynes is reported. This protocol enables facile access to 3,5-disubstituted isoxazolines and isoxazoles bearing a CF2P(O)(OEt)2 moiety in good to excellent yields, under mild reaction conditions.
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Affiliation(s)
- Romana Pajkert
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH, Campus Ring 1, P.O. Box 750 561, D-28759 Bremen, Germany.
| | - Henryk Koroniak
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Paweł Kafarski
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Gerd-Volker Röschenthaler
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH, Campus Ring 1, P.O. Box 750 561, D-28759 Bremen, Germany.
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26
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Jadhav PM, Rode AB, Kótai L, Pawar RP, Tekale SU. Revisiting applications of molecular iodine in organic synthesis. NEW J CHEM 2021. [DOI: 10.1039/d1nj02560k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Molecular iodine contributes significantly to organic transformations in synthetic organic chemistry. It works effectively due to its mild Lewis acidic character, ability as an oxidizing agent, good moisture stability, and easy availability.
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Affiliation(s)
- Popat M. Jadhav
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
| | - Ambadas B. Rode
- Regional Centre for Biotechnology, Faridabad-121 001, Haryana (NCR Delhi), India
| | - László Kótai
- Research Centre for Natural Sciences, ELKH, H-1117, Budapest, Hungary
| | - Rajendra P. Pawar
- Department of Chemistry, Shiv Chhatrapati College, Aurangabad 431005, Maharashtra, India
| | - Sunil U. Tekale
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
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27
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Antony P M, Balaji GL, Iniyavan P, Ila H. Reaction of 1,3-Bis(het)arylmonothio-1,3-diketones with Sodium Azide: Regioselective Synthesis of 3,5-Bis(het)arylisoxazoles via Intramolecular N–O Bond Formation. J Org Chem 2020; 85:15422-15436. [DOI: 10.1021/acs.joc.0c02216] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mary Antony P
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Gantala L. Balaji
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Pethaperumal Iniyavan
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India
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28
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Aegurla B, Jarwal N, Peddinti RK. Denitrative imino-diaza-Nazarov cyclization: synthesis of pyrazoles. Org Biomol Chem 2020; 18:6100-6107. [PMID: 32785358 DOI: 10.1039/d0ob01200a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An iodine-catalyzed denitrative imino-diaza-Nazarov cyclization (DIDAN) methodology has been developed for the synthesis of pyrazoles with high to excellent yields by using α-nitroacetophenone derivatives and in situ generated hydrazones. The key transformation of this oxidative 4π-electrocyclization proceeds through an enamine-iminium ion intermediate. This rapid one-pot DIDAN protocol results in the selective generation of C-C and C-N bonds and cleavage of a C-N bond.
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Affiliation(s)
- Balakrishna Aegurla
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Nisha Jarwal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Rama Krishna Peddinti
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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29
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The main directions and recent trends in the synthesis and use of isoxazoles. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02718-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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30
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Nakano R, Togo H. Efficient transformation of electron-rich arenes into diethyl 3-arylisoxazole-4,5-dicarboxylates. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Neto JSS, Zeni G. Alkynes and Nitrogen Compounds: Useful Substrates for the Synthesis of Pyrazoles. Chemistry 2020; 26:8175-8189. [PMID: 31990413 DOI: 10.1002/chem.201905276] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Indexed: 02/06/2023]
Abstract
The easy preparation and functionalization of pyrazoles associated with their innumerable biological properties have made this class of N-heterocycles very attractive for the development of new synthetic routes and applications. The cyclization reactions of alkynes and nitrogen compounds represent a powerful tool for the preparation of pyrazoles. This Review covers the recent advances in the preparation of pyrazoles by reacting alkynes and nitrogen compounds under transition-metal-catalyzed or metal-free conditions.
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Affiliation(s)
- Jose S S Neto
- Department of Biochemistry and Molecular Biology Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
| | - Gilson Zeni
- Department of Biochemistry and Molecular Biology Laboratório de Síntese, Reatividade, Avaliação Farmacológica e Toxicológica de Organocalcogênios, CCNE, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, 97105-900, Brazil
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32
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Brach N, Le Fouler V, Bizet V, Lanz M, Gallou F, Bailly C, Hoehn P, Parmentier M, Blanchard N. Optimized Synthesis of 7-Azaindazole by a Diels–Alder Cascade and Associated Process Safety. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nicolas Brach
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
| | - Vincent Le Fouler
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
| | - Vincent Bizet
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
| | - Marian Lanz
- Chemical and Analytical Development, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Fabrice Gallou
- Chemical and Analytical Development, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Corinne Bailly
- Service de Radiocristallographie, Fédération de Chimie Le Bel - FR2010, Université de Strasbourg, 1 rue Blaise Pascal, 67008 Strasbourg, France
| | - Pascale Hoehn
- Chemical and Analytical Development, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Michael Parmentier
- Chemical and Analytical Development, Novartis Pharma AG, CH-4056 Basel, Switzerland
| | - Nicolas Blanchard
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
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33
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Chalyk BA, Khutorianskyi A, Lysenko A, Fil Y, Kuchkovska YO, Gavrilenko KS, Bakanovych I, Moroz YS, Gorlova AO, Grygorenko OO. Regioselective Synthesis of Functionalized 3- or 5-Fluoroalkyl Isoxazoles and Pyrazoles from Fluoroalkyl Ynones and Binucleophiles. J Org Chem 2019; 84:15212-15225. [PMID: 31661620 DOI: 10.1021/acs.joc.9b02258] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A facile synthetic route toward either 3- or 5-fluoroalkyl-substituted isoxazoles or pyrazoles containing an additional functionalization site was developed and applied on a multigram scale. The elaborated approach extends the scope of fluoroalkyl substituents for introduction into the heterocyclic moiety, and uses convenient transformations of the side chain for incorporation of fluoroalkyl-substituted azoles into the structures of biologically active molecules. The utility of the obtained building blocks for isosteric replacement of alkyl-substituted isoxazole and pyrazole was shown by the synthesis of fluorinated Isocarboxazid and Mepiprazole analogues.
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Affiliation(s)
- Bohdan A Chalyk
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Institute of Organic Chemistry , National Academy of Sciences of Ukraine , Murmanska Street 5 , Kyiv 02660 , Ukraine
| | - Andrii Khutorianskyi
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Andrii Lysenko
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Yulia Fil
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Yuliya O Kuchkovska
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Konstantin S Gavrilenko
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Iulia Bakanovych
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
| | - Yurii S Moroz
- Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine.,Chemspace , Ilukstes iela 38-5 , Riga , LV - 1082 , Latvia
| | - Alina O Gorlova
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Institute of Organic Chemistry , National Academy of Sciences of Ukraine , Murmanska Street 5 , Kyiv 02660 , Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd. , Chervonotkatska Street 78 , Kyiv 02094 , Ukraine.,Taras Shevchenko National University of Kyiv , Volodymyrska Street 60 , Kyiv 01601 , Ukraine
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34
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Veerakanellore GB, Smith CM, Vasiliu M, Oliver AG, Dixon DA, Carrick JD. Synthesis of 1 H-Pyrazol-5-yl-pyridin-2-yl-[1,2,4]triazinyl Soft-Lewis Basic Complexants via Metal and Oxidant Free [3 + 2] Dipolar Cycloaddition of Terminal Ethynyl Pyridines with Tosylhydrazides. J Org Chem 2019; 84:14558-14570. [PMID: 31647644 DOI: 10.1021/acs.joc.9b02088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Soft-Lewis basic complexants that facilitate chemoselective separation of the minor actinides from the lanthanides are critical to the closure of the nuclear fuel cycle. Complexants that modulate covalent orbital interactions with relevant metals of interest can facilitate desired outcomes in liquid-liquid separation, allowing for further transmutative processes that decrease issues related with storage of spent nuclear fuel from energy and weapons production. Synthesis of previously unexplored scaffolds seeks to improve performance over benchmark complexants. In the current work, an intermolecular, thermally initiated, and DBU-assisted [3 + 2] cycloaddition of 3-(6-ethynyl-pyridin-2-yl)-5,6-diphenyl-[1,2,4]triazine dipolarophiles with structurally diverse 4-methylbenzenesulfono-hydrazides afforded 21 yet-to-be reported examples in 42-68% yield and modest regioselectivity for the desired regioisomer. Preparation of requisite starting materials, method definition, dipole and dipolarophile scope, ten-fold scale-up reaction, and downstream functional group interconversion are reported herein.
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Affiliation(s)
- Giri Babu Veerakanellore
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
| | - Caris M Smith
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Allen G Oliver
- Department of Chemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - David A Dixon
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Jesse D Carrick
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
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35
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Le Fouler V, Chen Y, Gandon V, Bizet V, Salomé C, Fessard T, Liu F, Houk KN, Blanchard N. Activating Pyrimidines by Pre-distortion for the General Synthesis of 7-Aza-indazoles from 2-Hydrazonylpyrimidines via Intramolecular Diels-Alder Reactions. J Am Chem Soc 2019; 141:15901-15909. [PMID: 31475527 DOI: 10.1021/jacs.9b07037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pyrimidines are almost unreactive partners in Diels-Alder cycloadditions with alkenes and alkynes, and only reactions under drastic conditions have previously been reported. We describe how 2-hydrazonylpyrimidines, easily obtained in two steps from commercially available 2-halopyrimidines, can be exceptionally activated by trifluoroacetylation. This allows a Diels-Alder cycloaddition under very mild reaction conditions, leading to a large diversity of aza-indazoles, a ubiquitous scaffold in medicinal chemistry. This reaction is general and scalable and has an excellent functional group tolerance. A straightforward synthesis of a key intermediate of Bayer's Vericiguat illustrates the potential of this cycloaddition strategy. Quantum mechanical calculations show how the simple N-trifluoroacetylation of 2-hydrazonylpyrimidines distorts the substrate into a transition-state-like geometry that readily undergoes the intramolecular Diels-Alder cycloaddition.
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Affiliation(s)
- Vincent Le Fouler
- Université de Haute-Alsace , Université de Strasbourg, CNRS, LIMA, UMR 7042 , 68000 Mulhouse , France
| | - Yu Chen
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182 , Université Paris-Sud, Université Paris-Saclay , Bâtiment 420 , 91405 Orsay cedex , France.,Laboratoire de Chimie Moléculaire, CNRS UMR 9168 , Ecole Polytechnique , IP Paris, route de Saclay , 91128 Palaiseau cedex , France
| | - Vincent Bizet
- Université de Haute-Alsace , Université de Strasbourg, CNRS, LIMA, UMR 7042 , 68000 Mulhouse , France
| | - Christophe Salomé
- SpiroChem AG Rosental Area , WRO-1047-3, Mattenstrasse 24 , 4058 Basel , Switzerland
| | - Thomas Fessard
- SpiroChem AG Rosental Area , WRO-1047-3, Mattenstrasse 24 , 4058 Basel , Switzerland
| | - Fang Liu
- College of Sciences , Nanjing Agricultural University , Nanjing 210095 , China
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095 , United States
| | - Nicolas Blanchard
- Université de Haute-Alsace , Université de Strasbourg, CNRS, LIMA, UMR 7042 , 68000 Mulhouse , France
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36
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Genç H, Taşdemir V, Tozlu İ, Ögün E. Synthesis of Novel Tetra-Substituted Pyrazole Derivatives from 2,3- Furandione. LETT ORG CHEM 2019. [DOI: 10.2174/1570178616666190314150302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Synthesis of pyrazole-3-carboxylic acid was progressed via two different protocols, one of
which is solid state. Pyrazole-3-carboxylic acid was converted into different derivatives such as ester,
urea, amide and nitrile. The amide compound was converted to nitrile using SOCl2 and DMF. Solid
state heating of carboxylic acid gave decarboxylated product. Cyclization of tetra-substituted pyrazole
with hydrazines resulted in pyrazolopyridazinones. The antimicrobial activities of the synthesized pyrazole
derivatives against Bacillus cereus, Escherichia coli, Micrococcus luteus, Staphylococcus aureus,
and Saccharomyces cerevisiae were evaluated. One of the pyrazole derivatives which possess nitro group
showed antimicrobial activity in only B. cereus, a Gram-positive bacteria, with an MIC of 128 μg/mL.
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Affiliation(s)
- Hasan Genç
- Department of Sciences, Faculty of Education, Van Yuzuncu Yil University, Van 65080, Turkey
| | - Volkan Taşdemir
- Science Research and Application Center, Van Yuzuncu Yil University, Van 65080, Turkey
| | - İsrafil Tozlu
- Department of Sciences, Faculty of Education, Van Yuzuncu Yil University, Van 65080, Turkey
| | - Erdal Ögün
- Biology Department, Science Faculty, Van Yuzuncu Yil University, Van 65080, Turkey
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37
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Carloni LE, Mohnani S, Bonifazi D. Synthesis of 3,5-Disubstituted Isoxazoles through a 1,3-Dipolar Cycloaddition Reaction between Alkynes and Nitrile Oxides Generated from O
-Silylated Hydroxamic Acids. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901045] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Laure-Elie Carloni
- Department of Chemistry and Namur Research College (NARC); University of Namur; Rue de Bruxelles 61 5000 Namur Belgium
| | - Stefan Mohnani
- Department of Chemistry and Namur Research College (NARC); University of Namur; Rue de Bruxelles 61 5000 Namur Belgium
| | - Davide Bonifazi
- School of Chemistry, Park Place, Main Building, CF10 3AT; Cardiff University; Cardiff Wales UK
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38
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Wang X, Chen Y, Chen X, Zhang X, Guan W, Li Y. A Tandem Ring‐Opening/Michael Addition/Ring‐Closure Sequence for the Regiospecific Synthesis of 5‐Hydroxy‐4,5‐dihydroisoxazoles. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900377] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xuesong Wang
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
| | - Yu Chen
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
| | - Xin Chen
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
| | - Xueying Zhang
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
| | - Weiwei Guan
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
| | - Youbin Li
- Hainan Provincial Key Laboratory of R&D of Tropical Herbs Haikou Key Laboratory of Li Nationality Medicine and School of PharmacyHainan Medical University Haikou 571199 P. R. China
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39
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Dai P, Tan X, Luo Q, Yu X, Zhang S, Liu F, Zhang WH. Synthesis of 3-Acyl-isoxazoles and Δ 2-Isoxazolines from Methyl Ketones, Alkynes or Alkenes, and tert-Butyl Nitrite via a Csp 3-H Radical Functionalization/Cycloaddition Cascade. Org Lett 2019; 21:5096-5100. [PMID: 31194561 DOI: 10.1021/acs.orglett.9b01683] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A novel metal-free tandem Csp3-H bond functionalization of ketones and 1,3-dipolar cycloaddition has been developed. An efficient approach to a variety of oxazole and isoxazoline derivatives is demonstrated using the 1,3-dipolar cycloaddition of alkynes and alkenes to nitrile oxides generated by reactions of methyl ketones with tert-butyl nitrite. This new protocol provides access to a variety of isoxazolines with diverse functionalities. An isoxazole generated in this way was found to have significant antifungal activity.
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Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xin Tan
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Qian Luo
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Xiang Yu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Shuguang Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Fang Liu
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science , College of Sciences, Nanjing Agricultural University , Nanjing 210095 , China
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40
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Yanai K, Togo H. Novel preparation of N-arylmethyl-N-arylmethyleneamine N-oxides from benzylic bromides with zinc and isobutyl nitrite. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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41
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Kandasamy M, Ganesan B, Hung MY, Lin WY. Fast and Efficient Continuous Flow Method for the Synthesis of Ynones and Pyrazoles. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900468] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mohanraj Kandasamy
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Balaji Ganesan
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Min-Yuan Hung
- Centre for Research Resources and Development; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
- Department of Medical Research; Kaohsiung Medical University Hospital; 807 Kaohsiung Taiwan
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42
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General Platform for the Conversion of Isoxazol-5-ones to 3,5-Disubstituted Isoxazoles via Nucleophilic Substitutions and Palladium Catalyzed Cross-Coupling Strategies. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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2-Amino-4-arylthiazoles through One-Pot Transformation of Alkylarenes with NBS and Thioureas. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900100] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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44
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Zuo Y, He X, Ning Y, Tang Q, Xie M, Hu W, Shang Y. Substituent-oriented C–N bond formation via N–H insertion or Wolff rearrangement of 5-aryl-1H-pyrazoles and diazo compounds. Org Biomol Chem 2019; 17:9766-9771. [DOI: 10.1039/c9ob01868a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Substituent-oriented C–N bond formation of 5-aryl-1H-pyrazoles with diazo compounds.
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Affiliation(s)
- Youpeng Zuo
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yi Ning
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Qiang Tang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Mengqing Xie
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Wangcheng Hu
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
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45
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Lin Y, Zhang K, Gao M, Jiang Z, Liu J, Ma Y, Wang H, Tan Q, Xiao J, Xu B. Copper nitrate-mediated synthesis of 3-aryl isoxazolines and isoxazoles from olefinic azlactones. Org Biomol Chem 2019; 17:5509-5513. [DOI: 10.1039/c9ob00857h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A copper nitrate-mediated [2 + 2 + 1] cycloaddition reaction was developed for the expedient synthesis of isoxazolines and isoxazoles from olefinic azlactones.
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46
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Thirukovela NS, Balaboina R, Botla V, Vadde R, Jonnalagadda SB, Vasam CS. One-pot regioselective synthesis of substituted pyrazoles and isoxazoles in PEG-400/water medium by Cu-free nano-Pd catalyzed sequential acyl Sonogashira coupling–intramolecular cyclization. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01335k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Catalyst efficacy of in situ generated Pd-nanoparticles in the regioselective one-pot synthesis of substituted pyrazoles and isoxazoles via sequential coupling-cyclization methodology in environmentally benign medium is described.
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47
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Mohamady S, Kralt B, Samwel SK, Taylor SD. Efficient One-Pot, Two-Component Modular Synthesis of 3,5-Disubstituted Pyrazoles. ACS OMEGA 2018; 3:15566-15574. [PMID: 31458212 PMCID: PMC6643981 DOI: 10.1021/acsomega.8b02304] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/06/2018] [Indexed: 06/10/2023]
Abstract
The pyrazole scaffold is one of the most prevalent and important tool in medicinal chemistry. Here, we report a method for preparing 3,5-diarylpyrazoles in good to excellent yield by reacting hydrazones of aryl aldehydes with substituted acetophenones in ethanol in the presence of dimethyl sulfoxide/cat. I2/cat. HCl. The reverse process, reacting hydrazones of substituted acetophenones with aryl aldehydes under the same conditions, also provides 3,5-diarylpyrazoles in good to excellent yields. Reaction of hydrazones of aldehydes with 2'-aryloxy ketones in the presence of cat. HCl in ethanol and the catalyst-free reaction of phenacyl bromides with hydrazones of aldehydes in ethanol also gave good to excellent yields of 3,5-diarylpyrazoles.
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Affiliation(s)
- Samy Mohamady
- Faculty
of Pharmacy, The British University in Egypt, Cairo-Suez Desert Road, Al-Sherouk 11837, Cairo, Egypt
| | - Braden Kralt
- Department
of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1
| | - Shery K. Samwel
- Faculty
of Pharmacy, The British University in Egypt, Cairo-Suez Desert Road, Al-Sherouk 11837, Cairo, Egypt
| | - Scott D. Taylor
- Department
of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1
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48
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Liu X, Hong D, She Z, Hersh WH, Yoo B, Chen Y. Complementary regioselective synthesis of 3,5-disubstituted isoxazoles from ynones. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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49
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50
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Venkateswarlu V, Kour J, Kumar KAA, Verma PK, Reddy GL, Hussain Y, Tabassum A, Balgotra S, Gupta S, Hudwekar AD, Vishwakarma RA, Sawant SD. Direct N-heterocyclization of hydrazines to access styrylated pyrazoles: synthesis of 1,3,5-trisubstituted pyrazoles and dihydropyrazoles. RSC Adv 2018; 8:26523-26527. [PMID: 35541044 PMCID: PMC9083136 DOI: 10.1039/c8ra04550j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 07/02/2018] [Indexed: 11/21/2022] Open
Abstract
A microwave-assisted method has been developed for the synthesis of tri-substituted pyrazoles via direct N-heterocyclization of hydrazines with metal-acetylacetonate and -dibenzylideneacetonate without using any base or additives. Most importantly, the synthesis of 1-aryl-5-phenyl-3-styryl-1H-pyrazoles was achieved in a single step using hydrochloride salt of various phenylhydrazines and this is the first report for direct construction of these molecules. The reaction medium and microwave conditions play a critical role for their selective product formation during the reaction. The present reaction explored the usage of metal-diketonic complexes as reaction substrates providing acetylacetone and dibenzylideneacetone moieties to directly participate in cyclization with hydrazines to form the corresponding pyrazoles in excellent yields. The present protocol introduces the important N-heterocyclic moieties in the final structures, giving the reaction great applications from a medicinal chemistry perspective, particularly in the late stage modification strategies in drug discovery.
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Affiliation(s)
- Vunnam Venkateswarlu
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Jaspreet Kour
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - K A Aravinda Kumar
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
| | - Praveen Kumar Verma
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
| | - G Lakshma Reddy
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Yaseen Hussain
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Aliya Tabassum
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
| | - Shilpi Balgotra
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Sorav Gupta
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Abhinandan D Hudwekar
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
| | - Ram A Vishwakarma
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
| | - Sanghapal D Sawant
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Canal Road Jammu-180001 India +91 191 2586333 +91 191 2585222
- Academy of Scientific and Innovative Research (AcSIR) Anusandhan Bhawan, 2 Rafi Marg New Delhi 110001 India
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