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Ahmad SAZ, Jena TK, Khan FA. Alkyl Enol Ethers: Development in Intermolecular Organic Transformation. Chem Asian J 2021; 16:1685-1702. [PMID: 33979009 DOI: 10.1002/asia.202100277] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/27/2021] [Indexed: 01/03/2023]
Abstract
Alkyl enol ethers (AEE) are versatile synthetic intermediates with a unique reactivity pattern. This review article summarizes the synthesis of AEE as well as its reactivity and how enol ether undergoes intermolecular reactions for various bond formation, leading to the construction of several useful organic molecules. The synthetic applications of alkyl enol ethers towards intermolecular bond-forming reactions include metal-catalyzed reactions, cycloaddition and heterocycle formation as well as rwactions in the field of natural products synthesis. The achievement of these impressive transformations prove the countless synthetic potential of AEE. The main objective of this review is to bring attentiveness among synthetic chemists to show how AEE extensively can be used to react with both electrophiles as well as nucleophiles, thereby behaving as an ambiphilic reactant. We trust that the unique reactivity pattern of alkyl enol ethers and the fundamental mechanistic idea can attract chemists in AEE chemistry. Exclusively, intermolecular reactions of AEE with other functionalized moieties have not been reviewed to the best of our knowledge.
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Affiliation(s)
- Sarwat Asma Ziya Ahmad
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India
| | - Tapan Kumar Jena
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India
| | - Faiz Ahmed Khan
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana, 502285, India
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Straub AJ, Scherag FD, Kim HI, Steiner MS, Brandstetter T, Rühe J. "CHicable" and "Clickable" Copolymers for Network Formation and Surface Modification. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6510-6520. [PMID: 34003660 DOI: 10.1021/acs.langmuir.1c00669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, we present the generation of novel, multifunctional polymer networks through a combination of C,H-insertion cross-linking (CHic) and click chemistry. To this, copolymers consisting of hydrophilic N,N-dimethylacrylamide as matrix component and repeat units containing azide moieties, as well as benzophenone or anthraquinone groups, are generated. The benzophenone or anthraquinone groups allow photo-cross-linking, surface attachment or covalent immobilization of adjacent (bio)molecules through CHic reactions. The azide moieties either can react with available alkynes through conventional click reactions or can be activated to form nitrenes, which can also undergo CHic reactions. By choosing appropriate reaction conditions, the same polymer can be used to follow very different reaction paths, opening up a plethora of choices for the generation of functional polymer networks. In the exemplary presented case ("CHic-Click"), irradiation of the copolymers with UV-A light (λirr = 365 nm) leads to cross-linking (network formation) and surface attachment simultaneously. The azide units remain intact during this cross-linking step, and alkyne-modified (bio)molecules can be bound through click reactions. Biofunctionalization of the polymer network with alkynylated streptavidin, followed by application of biotin-conjugated antibody and a model analyte, highlights the potential of these surface architectures as a toolbox which can be adapted for diverse bioanalytical applications.
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Affiliation(s)
- Alexander J Straub
- Laboratory for Chemistry and Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Frank D Scherag
- Laboratory for Chemistry and Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Hye In Kim
- Laboratory for Chemistry and Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Mark-Steven Steiner
- Microcoat Biotechnologie GmbH, Am Neuland 3, 82347 Bernried am Starnberger See, Germany
| | - Thomas Brandstetter
- Laboratory for Chemistry and Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
| | - Jürgen Rühe
- Laboratory for Chemistry and Physics of Interfaces, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany
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Synthesis of anti-Helicobacter pylori sesquiterpene employing tandem radical cyclization, and determination of the absolute configuration of the natural product. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shimokawa J, Fukuyama T. Synthetic Studies on Heteropolycyclic Natural Products: Strategies via Novel Reactions and Reactivities. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.1115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Tohru Fukuyama
- Graduate School of Pharmaceutical Sciences, Nagoya University
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Kundu A, Pathak S, Debnath K, Pramanik A. Facile synthesis of 3H,3′H-spiro[benzofuran-2,1′-isoindole]-3,3′-diones using monobromomalononitrile (MBM) as an efficient organo-brominating agent. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yamakawa T, Ideue E, Iwaki Y, Sato A, Tokuyama H, Shimokawa J, Fukuyama T. Total synthesis of tryprostatins A and B. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.112] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Jafarpour M, Rezaeifard A, Heidari M. Efficient Organic Transformations Mediated by ZrOCl2·8H2O in Water. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.519159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maasoumeh Jafarpour
- a Catalysis Research Laboratory, Department of Chemistry, Faculty of Science , University of Birjand , Birjand , South Khorasan , Iran
| | - Abdolreza Rezaeifard
- a Catalysis Research Laboratory, Department of Chemistry, Faculty of Science , University of Birjand , Birjand , South Khorasan , Iran
| | - Mahdieh Heidari
- a Catalysis Research Laboratory, Department of Chemistry, Faculty of Science , University of Birjand , Birjand , South Khorasan , Iran
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Yamakawa T, Ideue E, Shimokawa J, Fukuyama T. Total Synthesis of Tryprostatins A and B. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004963] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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9
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Yamakawa T, Ideue E, Shimokawa J, Fukuyama T. Total Synthesis of Tryprostatins A and B. Angew Chem Int Ed Engl 2010; 49:9262-5. [DOI: 10.1002/anie.201004963] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Mirjafari A, Mohammadpoor-Baltork I, Moghadam M, Tangestaninejad S, Mirkhani V, Khosropour AR. Microwave-promoted, one-pot conversion of alkoxymethylated protected alcohols into their corresponding nitriles, bromides, and iodides using [bmim][InCl4] as a green catalyst. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.04.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yoshida E. Nitroxide-mediated photo-living radical polymerization of methyl methacrylate using (4-tert-butylphenyl)diphenyl-sulfonium triflate as a photo-acid generator. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2161-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Effect of azoinitiators on nitroxide-mediated photo-living radical polymerization of methyl methacrylate. Colloid Polym Sci 2009. [DOI: 10.1007/s00396-009-2163-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Matsugi M, Hasegawa M, Hasebe S, Takai S, Suyama R, Wakita Y, Kudo K, Imamura H, Hayashi T, Haga S. Direct perfluoroalkylation of non-activated aromatic C–H bonds of phenols. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.04.106] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tajik H, Shirini F, Ali Zolfigol M, Samimi F. Convenient and Efficient Method for the Iodination of Benzylic and Aliphatic Alcohols by Using Al(HSO4)3/KI in Nonaqueous Solution. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910500330577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hassan Tajik
- a Department of Chemistry , Guilan University , Rasht , Guilan , Iran
| | - Farhad Shirini
- a Department of Chemistry , Guilan University , Rasht , Guilan , Iran
| | | | - Faeze Samimi
- a Department of Chemistry , Guilan University , Rasht , Guilan , Iran
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Firouzabadi H, Iranpoor N, Ebrahimzadeh F. Facile conversion of alcohols into their bromides and iodides by N-bromo and N-iodosaccharins/triphenylphosphine under neutral conditions. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.01.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Nambu H, Hata K, Matsugi M, Kita Y. Efficient Synthesis of Thioesters and Amides from Aldehydes by Using an Intermolecular Radical Reaction in Water. Chemistry 2005; 11:719-27. [PMID: 15580646 DOI: 10.1002/chem.200400754] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The combination of the water-soluble radical initiator, 2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (VA-044) and the surfactant, cetyltrimethyl-ammonium bromide (CTAB), was found to be the most suitable condition for the effective and direct synthesis of useful active thioesters (pentafluorophenyl thioesters) in water. In addition, the direct amidation of aldehydes was achieved by the addition of the amines to the thioesterification reaction mixture in water.
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Affiliation(s)
- Hisanori Nambu
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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Firouzabadi H, Iranpoor N, Jafarpour M. A simple, efficient, and highly selective method for the iodination of alcohols using ZrCl4/NaI. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.08.056] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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An efficient methodology for the C–C bond forming radical cyclization of hydrophobic substrates in water: effect of additive on radical reaction in water. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(02)01448-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Higashiyama K, Yamauchi T, Sugiyama J. Aryl Radical Cyclization of Chiral 3-Allyl-2-(2-bromophenyl)-1,3-oxazolidines with Tributyltin Hydride. HETEROCYCLES 2002. [DOI: 10.3987/com-02-s(m)42] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Usugi SI, Yorimitsu H, Oshima K. Triethylborane-induced radical allylation of α-halo carbonyl compounds with allylgallium reagent in aqueous media. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00815-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Nakamura T, Yorimitsu H, Shinokubo H, Oshima K. Reduction of Organic Halides with Tri-2-furylgermane: Stoichiometric and Catalytic Reduction. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2001. [DOI: 10.1246/bcsj.74.747] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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22
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Miyabe H, Ueda M, Yoshioka N, Yamakawa K, Naito T. Reactions of Alkyl Radicals with Oxime Ether: One-Pot Synthesis of α-Amino Acids. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00119-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Matsugi M, Gotanda K, Ohira C, Suemura M, Sano A, Kita Y. Highly Stereoselective Synthesis of Carbocycles via a Radical Addition Reaction Using 2,2'-Azobis(2,4-dimethyl-4-methoxyvaleronitrile) [V-70L]. J Org Chem 1999; 64:6928-6930. [PMID: 11674713 DOI: 10.1021/jo990777e] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Masato Matsugi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565-0871, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-1101, Japan
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Gotanda K, Matsugi M, Suemura M, Ohira C, Sano A, Oka M, Kita Y. Efficient stereoselective synthesis of α-C-glycopyranosides using 2,2′-azobis(2,4-dimethyl-4-methoxyvaleronitrile) [V-70]. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00587-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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