1
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Bray JM, Stephens SM, Weierbach SM, Vargas K, Lambert KM. Recent advancements in the use of Bobbitt's salt and 4-acetamidoTEMPO. Chem Commun (Camb) 2023; 59:14063-14092. [PMID: 37946555 DOI: 10.1039/d3cc04709a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Recent advances in synthetic methodologies for selective, oxidative transformations using Bobbitt's salt (4-acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium tetrafluoroborate, 1) and its stable organic nitroxide counterpart ACT (4-acetamidoTEMPO, 4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxyl, 2) have led to increased applications across a broad array of disciplines. Current applications and mechanistic understanding of these metal-free, environmentally benign, and easily accessible organic oxidants now span well-beyond the seminal use of 1 and 2 in selective alcohol oxidations. New synthetic methodologies for the oxidation of alcohols, ethers, amines, thiols, C-H bonds and other functional groups with 1 and 2 along with the field's current mechanistic understandings of these processes are presented alongside our contributions in this area. Exciting new areas harnessing the unique properties of these oxidants include: applications to drug discovery and natural product total synthesis, the development of new electrocatalytic methods for depolymerization of lignin and modification of other biopolymers, in vitro and in vivo nucleoside modifications, applications in supramolecular catalysis, the synthesis of new polymers and materials, enhancements in the design of organic redox flow batteries, uses in organic fuel cells, applications and advancements in energy storage, the development of electrochemical sensors, and the production of renewable fuels.
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Affiliation(s)
- Jean M Bray
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Shannon M Stephens
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Shayne M Weierbach
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Karen Vargas
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
| | - Kyle M Lambert
- Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Ave, Norfolk, VA 23529, USA.
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2
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Abstract
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability. Despite their reactivity toward various transient C radicals, some nitroxides can be easily stored under air at room temperature. Furthermore, nitroxides can be oxidized to oxoammonium salts (R1R2N═O+) or reduced to anions (R1R2N-O-), enabling them to act as valuable oxidants or reductants depending on their oxidation state. Therefore, they exhibit interesting reactivity across all three oxidation states. Due to these fascinating properties, nitroxides find extensive applications in diverse fields such as biochemistry, medicinal chemistry, materials science, and organic synthesis. This review focuses on the versatile applications of nitroxides in organic synthesis. For their use in other important fields, we will refer to several review articles. The introductory part provides a brief overview of the history of nitroxide chemistry. Subsequently, the key methods for preparing nitroxides are discussed, followed by an examination of their structural diversity and physical properties. The main portion of this review is dedicated to oxidation reactions, wherein parent nitroxides or their corresponding oxoammonium salts serve as active species. It will be demonstrated that various functional groups (such as alcohols, amines, enolates, and alkanes among others) can be efficiently oxidized. These oxidations can be carried out using nitroxides as catalysts in combination with various stoichiometric terminal oxidants. By reducing nitroxides to their corresponding anions, they become effective reducing reagents with intriguing applications in organic synthesis. Nitroxides possess the ability to selectively react with transient radicals, making them useful for terminating radical cascade reactions by forming alkoxyamines. Depending on their structure, alkoxyamines exhibit weak C-O bonds, allowing for the thermal generation of C radicals through reversible C-O bond cleavage. Such thermally generated C radicals can participate in various radical transformations, as discussed toward the end of this review. Furthermore, the application of this strategy in natural product synthesis will be presented.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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3
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Weierbach SM, Reynolds RP, Stephens SM, Vlasakakis KV, Ritter RT, White OM, Patel NH, Hayes EC, Dunmire S, Lambert KM. Chemoselective Oxidation of Thiols with Oxoammonium Cations. J Org Chem 2023; 88:11392-11410. [PMID: 35926190 DOI: 10.1021/acs.joc.2c01097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidation of various aryl and aliphatic thiols with the commercially available and environmentally benign reagent Bobbitt's salt (1) has been investigated. The reaction affords the corresponding disulfide products in good to excellent yields (71-99%) and can be accomplished in water, methanol, or acetonitrile solvent. Moreover, the process is highly chemoselective, tolerating traditionally oxidation-labile groups such as free amines and alcohols. Combined experimental and computational studies reveal that the oxidation takes place via a polar two-electron process with concomitant and unexpected deoxygenation of the oxoammonium cation through homolysis of the weak N-O bond, differing from prototypical radical-based thiol couplings. This unusual consumption of the oxidant has significant implications for the development of new nitroxide-based radical traps for probing S-centered radicals, the advancement of new electrochemical or catalytic processes involving nitroxide/oxoammonium salt redox couples, and applications to biological systems.
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Affiliation(s)
- Shayne M Weierbach
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Robert P Reynolds
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Shannon M Stephens
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Kostantinos V Vlasakakis
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Ramsey T Ritter
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Olivia M White
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Nishi H Patel
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Eric C Hayes
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Sydney Dunmire
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Kyle M Lambert
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
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4
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Stamoulis AG, Bruns DL, Stahl SS. Optimizing the Synthetic Potential of O 2: Implications of Overpotential in Homogeneous Aerobic Oxidation Catalysis. J Am Chem Soc 2023; 145:17515-17526. [PMID: 37534994 PMCID: PMC10629435 DOI: 10.1021/jacs.3c02887] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Molecular oxygen is the quintessential oxidant for organic chemical synthesis, but many challenges continue to limit its utility and breadth of applications. Extensive historical research has focused on overcoming kinetic challenges presented by the ground-state triplet electronic structure of O2 and the various reactivity and selectivity challenges associated with reactive oxygen species derived from O2 reduction. This Perspective will analyze thermodynamic principles underlying catalytic aerobic oxidation reactions, borrowing concepts from the study of the oxygen reduction reaction (ORR) in fuel cells. This analysis is especially important for "oxidase"-type liquid-phase catalytic aerobic oxidation reactions, which proceed by a mechanism that couples two sequential redox half-reactions: (1) substrate oxidation and (2) oxygen reduction, typically affording H2O2 or H2O. The catalysts for these reactions feature redox potentials that lie between the potentials associated with the substrate oxidation and oxygen reduction reactions, and changes in the catalyst potential lead to variations in effective overpotentials for the two half reactions. Catalysts that operate at low ORR overpotential retain a more thermodynamic driving force for the substrate oxidation step, enabling O2 to be used in more challenging oxidations. While catalysts that operate at high ORR overpotential have less driving force available for substrate oxidation, they often exhibit different or improved chemoselectivity relative to the high-potential catalysts. The concepts are elaborated in a series of case studies to highlight their implications for chemical synthesis. Examples include comparisons of (a) NOx/oxoammonium and Cu/nitroxyl catalysts, (b) high-potential quinones and amine oxidase biomimetic quinones, and (c) Pd aerobic oxidation catalysts with or without NOx cocatalysts. In addition, we show how the reductive activation of O2 provides a means to access potentials not accessible with conventional oxidase-type mechanisms. Overall, this analysis highlights the central role of catalyst overpotential in guiding the development of aerobic oxidation reactions.
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Affiliation(s)
- Alexios G Stamoulis
- Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - David L Bruns
- Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States
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5
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Iwabuchi Y, Nagasawa S. The Utility of Oxoammonium Species in Organic Synthesis: Beyond Alcohol Oxidation. HETEROCYCLES 2022. [DOI: 10.3987/rev-21-sr(r)2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Miller JL, Zhou L, Liu P, Floreancig PE. Mechanism-Based Approach to Reagent Selection for Oxidative Carbon-Hydrogen Bond Cleavage Reactions. Chemistry 2021; 28:e202103078. [PMID: 34822737 DOI: 10.1002/chem.202103078] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Indexed: 11/07/2022]
Abstract
Numerous hydride-abstracting agents generate the same cationic intermediate, but substrate features such as intermediate cation stability, oxidation potential, and steric environment can influence reaction rates in an oxidant-dependent manner. This manuscript provides experimental data to illustrate the role that structural features play in the kinetics of hydride abstraction reactions with commonly used quinone-, oxoammonium ion-, and carbocation- based oxidants. Computational studies of the transition state structures and energies explain these results and energy decomposition analysis calculations reveal unique sensitivities to electrostatic attraction and steric repulsions. Rigorous rate studies of select reactions validated the capacity of the calculations to predict reactivity trends. Additionally, kinetics studies demonstrate the potential for product inhibition in DDQ-mediated reactions. These studies provide a clear guide to select the optimal oxidant for structurally disparate substrates and lead to predictions of reactivity that were validated experimentally.
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Affiliation(s)
- Jenna L Miller
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania, 15260, United States
| | - Lin Zhou
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania, 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania, 15260, United States
| | - Paul E Floreancig
- Department of Chemistry, University of Pittsburgh Pittsburgh, Pennsylvania, 15260, United States
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7
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Meador RIL, Anderson RE, Chisholm JD. Tandem elimination-oxidation of tertiary benzylic alcohols with an oxoammonium salt. Org Biomol Chem 2021; 19:6233-6236. [PMID: 34231623 DOI: 10.1039/d1ob00965f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tertiary benzylic alcohols react with oxoammonium salts, undergoing a tandem elimination/allylic oxidation to provide an allylic ether product in a single step. This mode of reactivity provides a rapid entry into allylic ethers from certain benzylic tertiary alcohols. The allylic ether may be cleaved under reductive conditions to reveal the allylic alcohol.
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Affiliation(s)
- Rowan I L Meador
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244, USA.
| | - Robert E Anderson
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244, USA.
| | - John D Chisholm
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244, USA.
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8
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Carlet F, Bertarini G, Broggini G, Pradal A, Poli G. Oxoammonium‐Mediated Allylsilane–Ether Coupling Reaction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Federica Carlet
- Faculté des Sciences et Ingénierie CNRS Institut Parisien de Chimie Moléculaire IPCM Sorbonne Université 4 place Jussieu 75005 Paris France
- Dipartimento di Scienza e Alta Tecnologia Università dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Greta Bertarini
- Faculté des Sciences et Ingénierie CNRS Institut Parisien de Chimie Moléculaire IPCM Sorbonne Université 4 place Jussieu 75005 Paris France
- Dipartimento di Scienza e Alta Tecnologia Università dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Gianluigi Broggini
- Dipartimento di Scienza e Alta Tecnologia Università dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Alexandre Pradal
- Faculté des Sciences et Ingénierie CNRS Institut Parisien de Chimie Moléculaire IPCM Sorbonne Université 4 place Jussieu 75005 Paris France
| | - Giovanni Poli
- Faculté des Sciences et Ingénierie CNRS Institut Parisien de Chimie Moléculaire IPCM Sorbonne Université 4 place Jussieu 75005 Paris France
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9
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Xue Y, Yan Y, Jiang K, Chen W, Yang L. Iodine/water-mediated deprotective oxidation of allylic ethers to access α,β-unsaturated ketones and aldehydes. RSC Adv 2020; 10:14720-14724. [PMID: 35497130 PMCID: PMC9052112 DOI: 10.1039/d0ra02625e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/03/2020] [Indexed: 02/03/2023] Open
Abstract
The first iodine/water-mediated deprotective oxidation of allylic ethers to access α,β-unsaturated ketones and aldehydes was achieved. The reaction tolerates a wide range of functionalities. Furthermore, this protocol was found to be applicable to the oxidative transformation of allylic acetates. The proposed mechanism involves an oxygen transfer from solvent water to the carbonyl products. The first iodine/water-mediated deprotective oxidation of allylic ethers to access α,β-unsaturated ketones and aldehydes was effectively achieved.![]()
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Affiliation(s)
- Yuntian Xue
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Yaolong Yan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Kezhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Weifeng Chen
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China
| | - Lei Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University Hangzhou 311121 China .,Engineering Research Center of High Performance Polymer and Molding Technology, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao 266042 China
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10
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Miller SA, Nandi J, Leadbeater NE, Eddy NA. Probing the Effect of Counterions on the Oxidation of Alcohols Using Oxoammonium Salts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shelli A. Miller
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road 06269 Storrs Connecticut USA
| | - Jyoti Nandi
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road 06269 Storrs Connecticut USA
| | - Nicholas E. Leadbeater
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road 06269 Storrs Connecticut USA
| | - Nicholas A. Eddy
- Department of Chemistry; University of Connecticut; 55 North Eagleville Road 06269 Storrs Connecticut USA
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11
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Nagasawa S, Sasano Y, Iwabuchi Y. Synthesis of 1,3-Cycloalkadienes from Cycloalkenes: Unprecedented Reactivity of Oxoammonium Salts. Angew Chem Int Ed Engl 2018; 55:13189-13194. [PMID: 27650040 DOI: 10.1002/anie.201607752] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Indexed: 01/14/2023]
Abstract
Few methods allow for the direct conversion of cycloalkenes into cycloalkadienes with high chemo- and regioselectivity. Herein, we report a convenient one-pot process for this transformation that involves the unprecedented N-preferential group transfer of N-oxoammonium salts to cycloalkenes, followed by Cope elimination, to afford cycloalkadienes at room temperature and pressure.
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Affiliation(s)
- Shota Nagasawa
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yusuke Sasano
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Yoshiharu Iwabuchi
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan.
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12
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Miller SA, Bobbitt JM, Leadbeater NE. Oxidation of terminal diols using an oxoammonium salt: a systematic study. Org Biomol Chem 2018; 15:2817-2822. [PMID: 28281712 DOI: 10.1039/c7ob00039a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A systematic study of the oxidation of a range of terminal diols is reported, employing the oxoammonium salt 4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate (4-NHAc-TEMPO+ BF4-) as the oxidant. For substrates bearing a hydrocarbon chain of seven carbon atoms or more, the sole product is the dialdehyde. A series of post-oxidation reactions have been performed showing that the product mixture resulting from the oxidation step can be taken on directly to a subsequent transformation. For diols containing four to six carbon atoms, the lactone product is the major product upon oxidation. In the case of 1,2-ethanediol and 1,3-propanediol, when using a 1 : 0.5 stoichiometric ratio of substrate to oxidant, the corresponding monoaldehyde is formed which reacts rapidly with further diol to yield the acetal product. This is of particular synthetic value given both the difficulty of their preparation using other approaches and also their potential application in further reaction chemistry.
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Affiliation(s)
- Shelli A Miller
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269 USA.
| | - James M Bobbitt
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269 USA.
| | - Nicholas E Leadbeater
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269 USA.
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13
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Wang R, Tang Y, Xu M, Meng C, Li F. Transfer Hydrogenation of Aldehydes and Ketones with Isopropanol under Neutral Conditions Catalyzed by a Metal–Ligand Bifunctional Catalyst [Cp*Ir(2,2′-bpyO)(H2O)]. J Org Chem 2018; 83:2274-2281. [DOI: 10.1021/acs.joc.7b03174] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rongzhou Wang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People’s Republic of China
| | - Yawen Tang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People’s Republic of China
| | - Meng Xu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People’s Republic of China
| | - Chong Meng
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People’s Republic of China
| | - Feng Li
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, People’s Republic of China
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14
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Abstract
We present a mild way of converting secondary methyl ethers into ketones using calcium hypochlorite in aqueous acetonitrile with acetic acid as activator. The reaction is compatible with various oxygen- and nitrogen-containing functional groups and afforded the corresponding ketones in up to 98% yield. The use of this methodology could expand the application of the methyl group as a useful protecting group.
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Affiliation(s)
- Pieter J Gilissen
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ Nijmegen, Netherlands
| | - Daniel Blanco-Ania
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ Nijmegen, Netherlands
| | - Floris P J T Rutjes
- Institute for Molecules and Materials, Radboud University , Heyendaalseweg 135, 6525 AJ Nijmegen, Netherlands
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15
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Gergely M, Takács A, Kollár L. 4-Amino-TEMPO as N-Nucleophile in Palladium-Catalyzed Aminocarbonylation. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Máté Gergely
- Department of Inorganic Chemistry; University of Pécs and Szentágothai Research Centre; H-7624 Pécs, P.O. Box 266 Hungary
| | - Attila Takács
- MTA-PTE Research Group for Selective Chemical Syntheses; Ifjúság u. 6. H-7624 Pécs Hungary
| | - László Kollár
- Department of Inorganic Chemistry; University of Pécs and Szentágothai Research Centre; H-7624 Pécs, P.O. Box 266 Hungary
- MTA-PTE Research Group for Selective Chemical Syntheses; Ifjúság u. 6. H-7624 Pécs Hungary
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16
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Nagasawa S, Sasano Y, Iwabuchi Y. Synthesis of 1,3-Cycloalkadienes from Cycloalkenes: Unprecedented Reactivity of Oxoammonium Salts. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607752] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Shota Nagasawa
- Department of Organic Chemistry; Graduate School of Pharmaceutical Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Yusuke Sasano
- Department of Organic Chemistry; Graduate School of Pharmaceutical Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Yoshiharu Iwabuchi
- Department of Organic Chemistry; Graduate School of Pharmaceutical Sciences; Tohoku University; 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
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17
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Loman JJ, Carnaghan ER, Hamlin TA, Ovian JM, Kelly CB, Mercadante MA, Leadbeater NE. A combined computational and experimental investigation of the oxidative ring-opening of cyclic ethers by oxoammonium cations. Org Biomol Chem 2016; 14:3883-8. [DOI: 10.1039/c6ob00347h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidative ring-opening of cyclic ethers using oxoammonium cations is investigated using experimental and computational methods.
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Affiliation(s)
| | | | | | - John M. Ovian
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
| | | | | | - Nicholas E. Leadbeater
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
- Department of Community Medicine & Health Care
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18
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Hamlin TA, Kelly CB, Ovian JM, Wiles RJ, Tilley LJ, Leadbeater NE. Toward a Unified Mechanism for Oxoammonium Salt-Mediated Oxidation Reactions: A Theoretical and Experimental Study Using a Hydride Transfer Model. J Org Chem 2015; 80:8150-67. [DOI: 10.1021/acs.joc.5b01240] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trevor A. Hamlin
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Christopher B. Kelly
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - John M. Ovian
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Rebecca J. Wiles
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Leon J. Tilley
- Department
of Chemistry, Stonehill College, 320 Washington Street, Easton, Massachusetts 02357, United States
| | - Nicholas E. Leadbeater
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
- Department of Community Medicine & Health Care, University of Connecticut Health Center, The Exchange, 263 Farmington Avenue, Farmington, Connecticut 06030, United States
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19
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Lu P, Hou T, Gu X, Li P. Visible-Light-Promoted Conversion of Alkyl Benzyl Ether to Alkyl Ester or Alcohol via O-α-sp3 C–H Cleavage. Org Lett 2015; 17:1954-7. [DOI: 10.1021/acs.orglett.5b00663] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ping Lu
- Key Laboratory
of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering,
and Materials Science, Soochow University, 199 RenAi Road, Suzhou, Jiangsu 215123, China
| | - Tianyuan Hou
- Key Laboratory
of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering,
and Materials Science, Soochow University, 199 RenAi Road, Suzhou, Jiangsu 215123, China
| | - Xiangyong Gu
- Key Laboratory
of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering,
and Materials Science, Soochow University, 199 RenAi Road, Suzhou, Jiangsu 215123, China
| | - Pixu Li
- Key Laboratory
of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering,
and Materials Science, Soochow University, 199 RenAi Road, Suzhou, Jiangsu 215123, China
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