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Sumran G, Jain N, Kumar P, Aggarwal R. Trifluoromethyl-β-dicarbonyls as Versatile Synthons in Synthesis of Heterocycles. Chemistry 2024; 30:e202303599. [PMID: 38055226 DOI: 10.1002/chem.202303599] [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: 10/31/2023] [Revised: 12/01/2023] [Accepted: 12/04/2023] [Indexed: 12/07/2023]
Abstract
Trifluoromethyl group relishes a privileged position in the realm of medicinal chemistry because its incorporation into organic molecules often enhances the bioactivity by altering pharmacological profile of molecule. Trifluoromethyl-β-dicarbonyls have emerged as pivotal building blocks in synthetic organic chemistry due to their facile accessibility, stability and remarkable versatility. Owing to presence of nucleophilic and electrophilic sites, they offer multifunctional sites for the reaction. This review covers a meticulous exploration of their multifaceted role, encompassing an in-depth analysis of mechanism, extensive scope, limitations and wide-ranging applications in diverse organic synthesis, covering the literature from the 21st century. This comprehensive review encapsulates the applications of trifluoromethyl-β-dicarbonyls and their synthetic equivalents as precursors of complex and diverse heterocyclic scaffolds, fused heterocycles and spirocyclic compounds having medicinal and material importance. Their potent synthetic utility in cyclocondensation reactions with binucleophiles, cycloaddition reactions, C-C bond formations, asymmetric multicomponent reactions using classical/solvent-free/catalytic synthesis have been presented. Influence of unsymmetrical trifluoromethyl-β-diketones on regioselectivity of transformation is also reviewed. This review will benefit the synthetic and pharmaceutical communities to explore trifluoromethyl-β-dicarbonyls as trifluoromethyl building blocks for fabrication of heterocyclic scaffolds having implementation into drug discovery programs in the imminent future.
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Affiliation(s)
- Garima Sumran
- Department of Chemistry, D. A. V. College (Lahore), Ambala City, 134 003, Haryana, India
| | - Naman Jain
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136 119, India
| | - Prince Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136 119, India
| | - Ranjana Aggarwal
- Department of Chemistry, Kurukshetra University, Kurukshetra, 136 119, India
- CSIR-National Institute of Science Communication and Policy Research, New Delhi, 110012, India
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2
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Edilova YO, Osipova EA, Slepukhin PA, Saloutin VI, Bazhin DN. Exploring Three Avenues: Chemo- and Regioselective Transformations of 1,2,4-Triketone Analogs into Pyrazoles and Pyridazinones. Int J Mol Sci 2023; 24:14234. [PMID: 37762539 PMCID: PMC10531707 DOI: 10.3390/ijms241814234] [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: 08/10/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023] Open
Abstract
A convenient approach to substituted pyrazoles and pyridazinones based on 1,2,4-triketones is presented. Chemo- and regiocontrol in condensations of t-Bu, Ph-, 2-thienyl-, and CO2Et-substituted 1,2,4-triketone analogs with hydrazines are described. The direction of preferential nucleophilic attack was shown to be switched depending on the substituent nature in triketone as well as the reaction conditions. The acid and temperature effects on the selectivity of condensations were revealed. Regiochemistry of heterocyclic core formation was confirmed by NMR and XRD studies. The facile construction of heterocyclic motifs bearing acetyl and (or) carbethoxy groups suggests them as promising mono- or bifunctional building blocks for subsequent transformations.
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Affiliation(s)
- Yulia O. Edilova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Ekaterina A. Osipova
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
- Department of Organic and Biomolecular Chemistry, Ural Federal University Named after the First President of Russia B.N. Eltsin, 620002 Yekaterinburg, Russia
| | - Pavel A. Slepukhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Victor I. Saloutin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
| | - Denis N. Bazhin
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 620108 Yekaterinburg, Russia (V.I.S.)
- Department of Organic and Biomolecular Chemistry, Ural Federal University Named after the First President of Russia B.N. Eltsin, 620002 Yekaterinburg, Russia
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3
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Muzalevskiy VM, Sizova ZA, Nechaev MS, Nenajdenko VG. Acid-Switchable Synthesis of Trifluoromethylated Triazoles and Isoxazoles via Reaction of CF 3-Ynones with NaN 3: DFT Study of the Reaction Mechanism. Int J Mol Sci 2022; 23:ijms232314522. [PMID: 36498860 PMCID: PMC9735682 DOI: 10.3390/ijms232314522] [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: 10/21/2022] [Revised: 11/10/2022] [Accepted: 11/20/2022] [Indexed: 11/23/2022] Open
Abstract
A detailed study of the reaction of CF3-ynones with NaN3 was performed. It was found that the reaction permits the selective synthesis of either 4-trifluoroacetyltriazoles or 5-CF3-isoxazoles. The chemoselectivity of the reaction was switchable via acid catalysis. The reaction of CF3-ynones with NaN3 in EtOH produced high yields of 4-trifluoroacetyltriazoles. In contrast, the formation of 5-CF3-isoxazoles was observed under catalysis by acids. This acid-switchable procedure can be performed at sub-gram scale. The possible reaction mechanism was supported by DFT calculations. The synthetic utility of the prepared 4-trifluoroacetyltriazoles was demonstrated.
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Affiliation(s)
| | - Zoia A. Sizova
- Department of Chemistry, Lomonosov Moscow State University, 119899 Moscow, Russia
| | - Mikhail S. Nechaev
- Department of Chemistry, Lomonosov Moscow State University, 119899 Moscow, Russia
- A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Valentine G. Nenajdenko
- Department of Chemistry, Lomonosov Moscow State University, 119899 Moscow, Russia
- Correspondence:
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4
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5
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Efficient Catalytic Synthesis of Condensed Isoxazole Derivatives via Intramolecular Oxidative Cycloaddition of Aldoximes. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123860. [PMID: 35744982 PMCID: PMC9229713 DOI: 10.3390/molecules27123860] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/13/2022] [Accepted: 06/14/2022] [Indexed: 01/28/2023]
Abstract
The intramolecular oxidative cycloaddition reaction of alkyne- or alkene-tethered aldoximes was catalyzed efficiently by hypervalent iodine(III) species to afford the corresponding polycyclic isoxazole derivatives in up to a 94% yield. The structure of the prepared products was confirmed by various methods, including X-ray crystallography. Mechanistic study demonstrated the crucial role of hydroxy(aryl)iodonium tosylate as a precatalyst, which is generated from 2-iodobenzoic acid and m-chloroperoxybenzoic acid in the presence of a catalytic amount of p-toluenesulfonic acid.
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6
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Kowalczyk A, Utecht-Jarzyńska G, Mlostoń G, Jasiński M. Trifluoromethylated Pyrazoles via Sequential (3 + 2)-Cycloaddition of Fluorinated Nitrile Imines with Chalcones and Solvent-Dependent Deacylative Oxidation Reactions. Org Lett 2022; 24:2499-2503. [PMID: 35343703 PMCID: PMC9003577 DOI: 10.1021/acs.orglett.2c00521] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
![]()
A general approach
for preparation of two types of polyfunctionalized
3-trifluoromethylpyrazoles is reported. The protocol comprises (3
+ 2)-cycloaddition of the in situ generated trifluoroacetonitrile
imines with enones leading to trans-configured 5-acyl-pyrazolines
in a fully regio- and diastereoselective manner. Initially formed
cycloadducts were aromatized by treatment with manganese dioxide.
Depending on the solvent used, the oxidation step either led to fully
substituted pyrazoles (DMSO) or proceeded via a deacylative pathway
to afford 1,3,4-trisubstituted derivatives (hexane) with excellent
selectivity.
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Affiliation(s)
- Anna Kowalczyk
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91403 Łódź, Poland.,The University of Lodz Doctoral School of Exact and Natural Sciences, Banacha 12/16, 90237 Łódź, Poland
| | - Greta Utecht-Jarzyńska
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91403 Łódź, Poland
| | - Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91403 Łódź, Poland
| | - Marcin Jasiński
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, Tamka 12, 91403 Łódź, Poland
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7
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Colas K, V. D. dos Santos AC, Kohlhepp SV, Mendoza A. Direct Addition of Grignard Reagents to Aliphatic Carboxylic Acids Enabled by Bulky
turbo
‐Organomagnesium Anilides. Chemistry 2022; 28:e202104053. [PMID: 35084063 PMCID: PMC9306512 DOI: 10.1002/chem.202104053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Indexed: 12/22/2022]
Abstract
The synthesis of ketones through addition of organometallic reagents to aliphatic carboxylic acids is a straightforward strategy that is limited to organolithium reagents. More desirable Grignard reagents can be activated and controlled with a bulky aniline‐derived turbo‐Hauser base. This operationally simple procedure allows the straightforward preparation of a variety of aliphatic and perfluoroalkyl ketones alike from functionalized alkyl, aryl and heteroaryl Grignard reagents.
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Affiliation(s)
- Kilian Colas
- Dept. of Organic Chemistry Stockholm University Arrhenius Laboratory 106 91 Stockholm Sweden
| | | | - Stefanie V. Kohlhepp
- Dept. of Organic Chemistry Stockholm University Arrhenius Laboratory 106 91 Stockholm Sweden
| | - Abraham Mendoza
- Dept. of Organic Chemistry Stockholm University Arrhenius Laboratory 106 91 Stockholm Sweden
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8
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Tyumentsev IA, Kobelevskaya VA, Ushakov IA, Rulev AY. Nucleophilic reactions of ethyl (Z)-2‑bromo-4,4,4-trifluorobut-2-enoate: One molecule – various heterocycles. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2021.109946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Kani R, Inuzuka T, Kubota Y, Funabiki K. Synthesis of 1‐Trifluoromethylated Propargyl Alcohols by Two Successive Reactions of Cyclopentylmagnesium Bromide in a One‐Pot Manner. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ryunosuke Kani
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis Life Science Research Center Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
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10
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Expanding 1,2,4-triketone toolbox for use as fluorinated building blocks in the synthesis of pyrazoles, pyridazinones and β-diketohydrazones. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2021.109932] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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11
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Mittersteiner M, Farias FFS, Bonacorso HG, Martins MAP, Zanatta N. Ultrasound-assisted synthesis of pyrimidines and their fused derivatives: A review. ULTRASONICS SONOCHEMISTRY 2021; 79:105683. [PMID: 34562732 PMCID: PMC8473776 DOI: 10.1016/j.ultsonch.2021.105683] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/12/2021] [Accepted: 07/20/2021] [Indexed: 06/09/2023]
Abstract
The pyrimidine scaffold is present in many bioactive drugs; therefore, efficient synthetic routes that provide shorter reaction times, higher yields, and site-selective reactions are constantly being sought. Ultrasound (US) irradiation has emerged as an alternative energy source in the synthesis of these heterocyclic scaffolds, and over the last ten years there has been a significant increase in the number of publications mentioning US in either the construction or derivatization of the pyrimidine core. This review presents a detailed summary (with 140 references) of the effects of US (synergic or not) on the construction and derivatization of the pyrimidine core through classical reactions (e.g., multicomponent, cyclocondensation, cycloaddition, and alkylation reactions). The main points that were taken into consideration are as follows: chemo- and regioselectivity issues, and the results of conventional heating methods compared to US and mechanistic insights that are also presented and discussed for key reactions.
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Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil.
| | - Fellipe F S Farias
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, Brazil.
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12
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Mittersteiner M, Bonacorso HG, Martins MAP, Zanatta N. Haloacetylated Enol Ethers: a Way Out for the Regioselective Synthesis of Biologically Active Heterocycles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100495] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE) Departamento de Química Universidade Federal de Santa Maria 97105-900 Santa Maria Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE) Departamento de Química Universidade Federal de Santa Maria 97105-900 Santa Maria Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE) Departamento de Química Universidade Federal de Santa Maria 97105-900 Santa Maria Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE) Departamento de Química Universidade Federal de Santa Maria 97105-900 Santa Maria Brazil
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13
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Semenova AM, Pervova MG, Ezhikova MA, Kodess MI, Zapevalov AY, Pestov AV. Transesterification of dialkyl carbonates with fluorine-containing alcohols. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3169-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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14
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Chen H, Wen S, Cui Y, Lin L, Zhang H, Fang Z, You Y, Weng Z. A method for synthesis of polysubstituted 4-difluoromethyl and perfluoroalkyl pyrazoles. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Semenova AM, Ezhikova MA, Kodess MI, Zapevalov AY, Pestov AV. Phosgene-free synthesis of symmetric bis(polyfluoroalkyl) carbonates. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.03.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Schneider T, Heinrich G, Koch R, Maas G. Reactions of a 3‐Phenyl‐1‐trifluoromethyl‐prop‐2‐yne Iminium Salt with Furans, Thiophenes, and Pyrroles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001577] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thomas Schneider
- Institute of Organic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Georg Heinrich
- Institute of Organic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Raphael Koch
- Institute of Organic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Gerhard Maas
- Institute of Organic Chemistry I Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
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17
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Bag D, Sawant SD. Heteroarene-tethered Functionalized Alkyne Metamorphosis. Chemistry 2021; 27:1165-1218. [PMID: 32603015 DOI: 10.1002/chem.202002154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 12/11/2022]
Abstract
Heteroarene-tethered functionalized alkynes are multipotent synthons in organic chemistry. This detailed Review described herein offers a thorough discussion of the metamorphosis of heteroarene-tethered functionalized alkynes, an area which has earned much attention over the past decade in the straightforward synthesis of architecturally complex heterocyclic scaffolds in atom and step economic manner. Depending upon the variety of functionalized alkynes, this Review is divided into multiple sections. Amongst the vast array of synthetic transformations covered, dearomatizing spirocyclizations and cascade spirocyclization/rearrangement are of great interest. Synthetic transformations involving the heteroarene-tethered functionalized alkynes with scope, challenges, limitations, mechanism, their application in the total synthesis of natural products and future perceptions are surveyed.
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Affiliation(s)
- Debojyoti Bag
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
| | - Sanghapal D Sawant
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
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18
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Affiliation(s)
- Pavel K. Mykhailiuk
- Enamine Ltd., Chervonotkatska 78, 02094 Kyiv, Ukraine
- Chemistry Department, Taras Shevchenko National University of Kyiv, Volodymyrska 64, 01601 Kyiv, Ukraine
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19
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Murray BJ, Marsh TGF, Yufit DS, Fox MA, Harsanyi A, Boulton LT, Sandford G. HFO‐1234yf as a CF
3
‐Building Block: Synthesis and Chemistry of CF
3
‐Ynones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001071] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ben J. Murray
- Department of Chemistry Durham University South Road DH1 3LE Durham U.K
| | | | - Dmitri S. Yufit
- Department of Chemistry Durham University South Road DH1 3LE Durham U.K
| | - Mark A. Fox
- Department of Chemistry Durham University South Road DH1 3LE Durham U.K
| | - Antal Harsanyi
- Medicines Research Centre GlaxoSmithKline R&D Ltd Gunnels Wood Road SG1 2NY Stevenage Hertfordshire U.K
| | - Lee T. Boulton
- Medicines Research Centre GlaxoSmithKline R&D Ltd Gunnels Wood Road SG1 2NY Stevenage Hertfordshire U.K
| | - Graham Sandford
- Department of Chemistry Durham University South Road DH1 3LE Durham U.K
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20
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Wang ZY, Wang KK, Chen R, Liu H, Chen K. Ynones in Reflex-Michael Addition, CuAAC, and Cycloaddition, as Well as their Use as Nucleophilic Enols, Electrophilic Ketones, and Allenic Precursors. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901921] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhan-Yong Wang
- College of Chemistry and Chemical Engineering; Xinxiang University; 453000 Xinxiang Henan P. R. of China
| | - Kai-Kai Wang
- College of Chemistry and Chemical Engineering; Xinxiang University; 453000 Xinxiang Henan P. R. of China
| | - Rongxiang Chen
- College of Chemistry and Chemical Engineering; Xinxiang University; 453000 Xinxiang Henan P. R. of China
| | - Huan Liu
- College of Chemistry and Chemical Engineering; Xinxiang University; 453000 Xinxiang Henan P. R. of China
| | - Kaijun Chen
- Department of Chemistry; Lishui University; No. 1, Xueyuan Road 323000 Lishui City Zhejiang Province P. R. China
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21
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Kamal R, Kumar R, Kumar V, Bhardwaj V. Synthetic Utilization of α,β‐Chalcone Dibromide In Heterocyclic Chemistry and Stereoselective Debromination. ChemistrySelect 2019. [DOI: 10.1002/slct.201902262] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Raj Kamal
- Department of ChemistryKurukshetra University Kurukshetra Haryana India- 136119
| | - Ravinder Kumar
- Department of ChemistryKurukshetra University Kurukshetra Haryana India- 136119
| | - Vipan Kumar
- Department of ChemistryKurukshetra University Kurukshetra Haryana India- 136119
| | - Vikas Bhardwaj
- Department of ChemistrySeth Jai Parkash Mukad Lal Institute of Engineering and Technology Radaur. Yamunanagar Haryana 135133 India
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22
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Colas K, Dos Santos ACVD, Mendoza A. i-Pr 2NMgCl·LiCl Enables the Synthesis of Ketones by Direct Addition of Grignard Reagents to Carboxylate Anions. Org Lett 2019; 21:7908-7913. [PMID: 31513423 DOI: 10.1021/acs.orglett.9b02899] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The direct preparation of ketones from carboxylate anions is greatly limited by the required use of organolithium reagents or activated acyl sources that need to be independently prepared. Herein, a specific magnesium amide additive is used to activate and control the addition of more tolerant Grignard reagents to carboxylate anions. This strategy enables the modular synthesis of ketones from CO2 and the preparation of isotopically labeled pharmaceutical building blocks in a single operation.
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Affiliation(s)
- Kilian Colas
- Department of Organic Chemistry , Stockholm University , Arrhenius Laboratory , 106 91 Stockholm , Sweden
| | - A Catarina V D Dos Santos
- Department of Organic Chemistry , Stockholm University , Arrhenius Laboratory , 106 91 Stockholm , Sweden
| | - Abraham Mendoza
- Department of Organic Chemistry , Stockholm University , Arrhenius Laboratory , 106 91 Stockholm , Sweden
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23
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Affiliation(s)
- Carmen Nájera
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
| | - Leiv K. Sydnes
- Department of Chemistry, University of Bergen, Allégt. 41, Bergen NO-5007, Norway
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO−CINQA), Universidad de Alicante, Apdo. 99, Alicante E-03080, Spain
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24
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Li Y, Yu J, Bi Y, Yan G, Huang D. Tandem Reactions of Ynones:viaConjugate Addition of Nitrogen‐, Carbon‐, Oxygen‐, Boron‐, Silicon‐, Phosphorus‐, and Sulfur‐Containing Nucleophiles. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900611] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yang Li
- Department of ChemistryLishui University No. 1 Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Jian Yu
- Department of ChemistryLishui University No. 1 Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Yicheng Bi
- Department of ChemistryQingdao University of Science & Technology Qingdao Shandong People's Republic of China
| | - Guobing Yan
- Department of ChemistryLishui University No. 1 Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Dayun Huang
- Department of ChemistryLishui University No. 1 Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
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25
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Mittersteiner M, Andrade VP, Zachow LL, Frizzo CP, Bonacorso HG, Martins MAP, Zanatta N. Synthesis of N-Pyrrolyl(furanyl)-Substituted Piperazines, 1,4-Dizepanes, and 1,4-Diazocanes. J Org Chem 2019; 84:8976-8983. [PMID: 31259554 DOI: 10.1021/acs.joc.9b00867] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthetic potential of 5-bromo-1,1,1-trifluoro-4-methoxypent-3-en-2-one toward the catalyst-free synthesis of N-pyrrolyl(furanyl)-piperazines, 1,4-diazepanes, and 1,4-diazocanes through a telescoped protocol is reported. This three-component one-pot method provided 23 examples with high chemo- and regioselectivity at yields up to 96%.
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Affiliation(s)
- Mateus Mittersteiner
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Valquiria P Andrade
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Lucimara L Zachow
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Clarissa P Frizzo
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química , Universidade Federal de Santa Maria , 97105-900 Santa Maria , Rio Grande do Sul , Brazil
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26
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Muzalevskiy VM, Sizova ZA, Shastin AV, Nenajdenko VG. Metal-Free Approach to Zolpidem, Alpidem and their Analogues via Amination of Dibromoalkenes Derived from Imidazopyridine and Imidazothiazole. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Zoia A. Sizova
- Department of Chemistry; Lomonosov Moscow State University; 119899 Moscow Russia
| | - Alexey V. Shastin
- Institute of Problems of Chemical Physics; Russian Academy of Sciences; 142432 Chernogolovka Russia
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27
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Romanov AR, Cahard D, Rulev AY. Regioselectivity Issues in the Addition of Grignard Reagents to Trifluoromethylated α-Bromoenones. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900155] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexey R. Romanov
- A. E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences; 1 Favorsky Str., Irkutsk 664033 Russia
- CNRS UMR 6014 COBRA; Normandie Université; 76821 Mont Saint Aignan France
| | - Dominique Cahard
- CNRS UMR 6014 COBRA; Normandie Université; 76821 Mont Saint Aignan France
| | - Alexander Yu. Rulev
- A. E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences; 1 Favorsky Str., Irkutsk 664033 Russia
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28
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Obydennov DL, Khammatova LR, Eltsov OS, Sosnovskikh VY. A chemo- and regiocontrolled approach to bipyrazoles and pyridones via the reaction of ethyl 5-acyl-4-pyrone-2-carboxylates with hydrazines. Org Biomol Chem 2019; 16:1692-1707. [PMID: 29451283 DOI: 10.1039/c7ob02725g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chemo- and regiocontrolled syntheses of pyrazoles and pyridones are presented on the basis of 4-pyrones. A novel approach towards highly functionalized 3,4'-bipyrazoles has been developed by using reactions of ethyl 5-acylcomanoates with hydrazines. The acid-promoted double cyclocondensation allows switching of the structure of the pyrazole rings easily through changing both the nature of hydrazine and the reaction conditions. The transformation of 4-pyrones with phenylhydrazine in EtOH at -20 °C leads to hydroxypyridones as monoaddition products which can be used as precursors for the preparation of pyridone and pyrazole derivatives. A novel rearrangement of 2-hydroxypyridone to pyrazolyl-1,3-diketones in DMSO was found. The structure and regiochemistry of bipyrazoles were confirmed by X-ray analysis and 2D NMR experiments.
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Affiliation(s)
- D L Obydennov
- Institute of Natural Sciences and Mathematics, Ural Federal University, 51 Lenina Ave., 620000 Ekaterinburg, Russian Federation.
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29
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Muzalevskiy VM, Nenajdenko VG. Electrophilic halogenation of hydrazones of CF 3-ynones. Regioselective synthesis of 4-halo-substituted 3-CF 3-pyrazoles. Org Biomol Chem 2018; 16:7935-7946. [PMID: 30318541 DOI: 10.1039/c8ob02247j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An efficient approach for the synthesis of 4-halo-3-CF3-pyrazoles was elaborated using the cyclization of hydrazones of CF3-ynones induced by electrophilic halogenation. This method can be used for the regioselective synthesis of 3-CF3-pyrazoles substituted at the 4-position with any halogen (I, Br or Cl). The high (up to quantitative) yields, mild conditions and simplicity of the reaction protocol are the advantages of the proposed method. It was demonstrated that cross-coupling with 4-iodo-3-CF3-pyrazoles can be used for the synthesis of a broad family of tetrasubstituted pyrazoles. Moreover, it was found that this method is suitable for the synthesis of 4-substituted derivatives of Celebrex and SC-560.
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Affiliation(s)
- Vasiliy M Muzalevskiy
- Department of Chemistry, Moscow State University, Leninskie Gory, Moscow 119992, Russia.
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30
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Rulev AY, Romanov AR, Kondrashov EV, Ushakov IA, Muzalevskiy VM, Nenajdenko VG. Assembly of Trifluoromethylated Morpholines through Cascade Reactions of Bromoenones with Secondary Amino Alcohols. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800659] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Yu. Rulev
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
| | - Alexey R. Romanov
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
| | - Evgeniy V. Kondrashov
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
| | - Igor A. Ushakov
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
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31
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Gerus II, Balabon OA, Pazenok SV, Lui N, Kondratov IS, Tarasenko KV, Shaitanova EN, Ivasyshyn VE, Kukhar VP. Synthesis and Properties of Polyfunctional Cyclic β-Alkoxy-α,β-Unsaturated Ketones Based on 4-Methylene-1,3-dioxolanes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800786] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Igor I. Gerus
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Olga A. Balabon
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Sergiy V. Pazenok
- Institute of Bioorganic Chemistry and Petrochemistry; Bayer AG; Alfred-Nobel-Strasse 50 40789 Monheim Germany
| | - Norbert Lui
- Institute of Bioorganic Chemistry and Petrochemistry; Bayer AG; Alfred-Nobel-Strasse 50 40789 Monheim Germany
| | - Ivan S. Kondratov
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Karen V. Tarasenko
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Elena N. Shaitanova
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Viktor E. Ivasyshyn
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
| | - Valery P. Kukhar
- Department of Fine Organic Synthesis; Institute of Bioorganic Chemistry and Petrochemistry; National Ukrainian Academy of Science; Murmanska Str. 1 02094 Kiev Ukraine
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32
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Topchiy MA, Zharkova DA, Asachenko AF, Muzalevskiy VM, Chertkov VA, Nenajdenko VG, Nechaev MS. Mild and Regioselective Synthesis of 3-CF3
-Pyrazoles by the AgOTf-Catalysed Reaction of CF3
-Ynones with Hydrazines. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800208] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Maxim A. Topchiy
- A. V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; Leninsky Prospect 29 Moscow Russia
| | - Daria A. Zharkova
- A. V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; Leninsky Prospect 29 Moscow Russia
- Department of Chemistry; Moscow State University; Leninskie Gory 119992 Moscow Russia
| | - Andrey F. Asachenko
- A. V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; Leninsky Prospect 29 Moscow Russia
| | | | | | | | - Mikhail S. Nechaev
- A. V. Topchiev Institute of Petrochemical Synthesis; Russian Academy of Sciences; Leninsky Prospect 29 Moscow Russia
- Department of Chemistry; Moscow State University; Leninskie Gory 119992 Moscow Russia
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33
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Affiliation(s)
- Alexander Yu. Rulev
- A. E. Favorsky Institute of Chemistry; Siberian Division of the Russian Academy of Sciences; 664033 Irkutsk Russia
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34
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Peng S, Wang Z, Zhang L, Zhang X, Huang Y. Streamlined asymmetric α-difunctionalization of ynones. Nat Commun 2018; 9:375. [PMID: 29371601 PMCID: PMC5785506 DOI: 10.1038/s41467-017-02801-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 12/28/2017] [Indexed: 01/01/2023] Open
Abstract
Ynones are a unique class of structural motifs that show remarkable chemical versatility. Chiral ynones, particularly those possessing an α-stereogenic center, are highly attractive templates for structural diversification. So far, only very limited examples have been reported for asymmetric α-functionalization of ynones. Asymmetric double α-functionalization of ynones remains elusive. Here we describe a streamlined strategy for asymmetric α-difunctionalization of ynones. We developed a gold-catalyzed multicomponent condensation reaction from a simple ynone, an amine, and an electrophilic alkynylating reagent to generate a 1,2-dialkynyl enamine, a key stable and isolable intermediate. This intermediate can undergo asymmetric fluorination catalyzed by a chiral phosphoric acid derivative. Chiral ynones with an α-quaternary carbon and containing a fluorine and an alkyne can be synthesized in high yield and high ee. The synthetic utility of this method is demonstrated by the synthesis of enantioenriched tri(hetero)arylmethyl fluorides. Chiral ynones with an α-quaternary carbon are attractive synthetic building blocks for natural and pharmaceutical products. Here, the authors report an asymmetric α-difunctionalization of simple ynones, involving a gold-catalyzed step and yielding enantioenriched fluorinated quaternary stereocentres.
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Affiliation(s)
- Siyu Peng
- Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, 518055, Shenzhen, China
| | - Zhaofeng Wang
- Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, 518055, Shenzhen, China
| | - Linxing Zhang
- Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, 518055, Shenzhen, China
| | - Xinhao Zhang
- Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, 518055, Shenzhen, China
| | - Yong Huang
- Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, 518055, Shenzhen, China.
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35
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Synthesis and tuberculostatic activity of functionalized pyrazoles derived from (trifluoromethyl)pyrazole containing a hydrazone group. Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2214-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Singh D, Sharma P, Kumar R, Pandey SK, Malakar CC, Singh V. An Expeditious Approach for the Synthesis of β-Carboline−Pyrazole-Based Molecular Hybrids. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700545] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Dharmender Singh
- Department of Chemistry; Dr. B. R. Ambedkar National Institute of Technology (NIT) Jalandhar; 144011 Punjab India
| | - Pooja Sharma
- School of Chemistry & Biochemistry; Thapar University; Patiala 147004 Punjab India
| | - Rakesh Kumar
- Department of Chemistry; Dr. B. R. Ambedkar National Institute of Technology (NIT) Jalandhar; 144011 Punjab India
| | - Satyendra K. Pandey
- School of Chemistry & Biochemistry; Thapar University; Patiala 147004 Punjab India
- Department of Chemistry; Banaras Hindu University (BHU); Varanasi 221005 Uttar Pradesh India
| | - Chandi C. Malakar
- Department of Chemistry; National Institute of Technology (NIT) Manipur; Imphal 795004 India
| | - Virender Singh
- Department of Chemistry; Dr. B. R. Ambedkar National Institute of Technology (NIT) Jalandhar; 144011 Punjab India
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37
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Romanov AR, Rulev AY, Ushakov IA, Muzalevskiy VM, Nenajdenko VG. One-Pot, Atom and Step Economy (PASE) Assembly of Trifluoromethylated Pyrimidines from CF3
-Ynones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700727] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Alexey R. Romanov
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
| | - Alexander Yu. Rulev
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
| | - Igor A. Ushakov
- A. E. Favorsky Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 664033 Irkutsk Russia
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38
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Muzalevskiy VM, Rulev AY, Romanov AR, Kondrashov EV, Ushakov IA, Chertkov VA, Nenajdenko VG. Selective, Metal-Free Approach to 3- or 5-CF3-Pyrazoles: Solvent Switchable Reaction of CF3-Ynones with Hydrazines. J Org Chem 2017. [DOI: 10.1021/acs.joc.7b00774] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Alexander Yu. Rulev
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russia
| | - Alexey R. Romanov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russia
| | - Evgeniy V. Kondrashov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russia
| | - Igor A. Ushakov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russia
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39
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40
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Andriyankova LV, Nikitina LP, Belyaeva KV, Mal’kina AG, Afonin AV, Muzalevskii VM, Nenaidenko VG, Trofimov BA. Opening of the pyridine ring in the system 1,1,1-trifluoro-4-phenylbut-3-yn-2-one–water. Stereoselective synthesis of 5-{[(1Z)-4,4,4-trifluoro-3-oxo-1-phenylbut-1-en-1-yl]amino}penta-2,4-dienal. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428016120289] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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41
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Rulev AY, Romanov AR, Kondrashov EV, Ushakov IA, Vashchenko AV, Muzalevskiy VM, Nenajdenko VG. Domino Assembly of Trifluoromethylated N,O-Heterocycles by the Reaction of Fluorinated α-Bromoenones with Amino Alcohols. J Org Chem 2016; 81:10029-10034. [DOI: 10.1021/acs.joc.6b01927] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Yu. Rulev
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
| | - Alexey R. Romanov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
| | - Evgeniy V. Kondrashov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
| | - Igor A. Ushakov
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
| | - Alexander V. Vashchenko
- A.
E. Favorsky Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Irkutsk 664033, Russia
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42
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Hsieh MT, Lin HC, Kuo SC. Synthesis of fluazolate via the application of regioselective [3+2] cyclocondensation and nucleophilic substitution-cyclization strategies. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Gonçalves HA, Pereira BA, Teixeira WK, Moura S, Flores DC, Flores AF. Synthesis of 2,2,2-trifluoroethyl 1H-pyrazole carboxylates: Insight into the mechanism of trichloromethyl group hydrolysis. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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44
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N -Vinyl-2-(trifluoroacetylethynyl)pyrroles and E -2-(1-bromo-2-trifluoroacetylethenyl)pyrroles: Cross-coupling vs. addition during C H-functionalization of pyrroles with bromotrifluoroacetylacetylene in solid Al 2 O 3 medium. H-bonding control. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.03.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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