1
|
Man Y, Xu B. Generation and Radical-Radical Cross-Coupling of Alkenyloxy Radical. Org Lett 2024. [PMID: 38502939 DOI: 10.1021/acs.orglett.4c00627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Alkene-attached oxygen radicals are rarely used, as highly reactive oxygen radicals are incompatible with the alkene moiety. The direct radical-radical cross-coupling of O radicals is also challenging (limited to N-O bond formation) because of the lack of suitable persistent radical species. This study demonstrated the feasibility of using Breslow intermediate radical (BIR) as a persistent radical to capture unstable π-conjugated O radicals and allow the C-O radical-radical cross-coupling.
Collapse
Affiliation(s)
- Yunquan Man
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Bo Xu
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| |
Collapse
|
2
|
Chicas-Baños DF, López-Rivas M, González-Bravo FJ, Sartillo-Piscil F, Frontana-Uribe BA. Access to carbonyl compounds via the electroreduction of N-benzyloxyphthalimides: Mechanism confirmation and preparative applications. Heliyon 2024; 10:e23808. [PMID: 38226225 PMCID: PMC10788431 DOI: 10.1016/j.heliyon.2023.e23808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/10/2023] [Accepted: 12/13/2023] [Indexed: 01/17/2024] Open
Abstract
A method to access carbonyl compounds using reductive conditions was evaluated via electrochemical reduction of their corresponding N-benzyloxyphthalimide derivatives (NBOPIs). The mechanism of this originally reported electrochemical reaction was proposed based on DFT calculation and is experimentally confirmed herein, contrasting simulated and experimental cyclic voltammetry data. The reaction scope studied in a preparative scale and using redox sensitive functional groups showed good selectivity and tolerance toward oxidation under the reaction conditions with a moderate to good yield (50-71%). Nevertheless, some restrictions with reducible functional groups, like benzyl-brominated and nitro-aromatic derivatives, were observed. The present approach can be considered a self-sustainable electrochemical catalysis for the synthesis of aromatic carbonylic compounds passing through anion radical intermediates produced by a cathodic reaction.
Collapse
Affiliation(s)
- Diego Francisco Chicas-Baños
- Universidad de El Salvador (UES), Facultad de Ciencias Naturales y Matemática, Escuela de Química, Final 25 Av. Nte, 1101, San Salvador, El Salvador
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Mexico City, 04510, Mexico
| | - Mariely López-Rivas
- Centro Conjunto Química Sustentable UAEMéx-UNAM, Km 14.5 Carretera Toluca-Ixtlahuaca, Toluca, 50200, Estado de México, Mexico
| | - Felipe J. González-Bravo
- Departamento de Química, Centro de Investigación y Estudios Avanzados, Av. Instituto Politécnico Nacional 2508, 07360, Mexico City, Mexico
| | - Fernando Sartillo-Piscil
- Centro de Investigación de la Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla (BUAP), 14 Sur Esq. San Claudio, Col. San Manuel, 72570, Puebla, Mexico
| | - Bernardo Antonio Frontana-Uribe
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Mexico City, 04510, Mexico
- Centro Conjunto Química Sustentable UAEMéx-UNAM, Km 14.5 Carretera Toluca-Ixtlahuaca, Toluca, 50200, Estado de México, Mexico
| |
Collapse
|
3
|
Zhao L, Zhong Q, Tian J, Luo M, Yang C, Guo L, Xia W. Electrochemical Synthesis of β-Functionalized Ketones via Ring-Opening of Cycloalkanols. Org Lett 2022; 24:4421-4426. [PMID: 35686882 DOI: 10.1021/acs.orglett.2c01649] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrochemical deconstructive functionalization of cycloalkanols with nucleophiles has been studied, which allows functionalization to occur exclusively at the β-position of ketones. The substrate scope includes a wide range of cycloalkanols as well as diverse N, O, C, and P-centered nucleophiles, providing ready access to β-functionalized ketones as products. Mechanistic studies support the generation of α,β-unsaturated ketones as key intermediates followed by Michael addition with nucleophiles.
Collapse
Affiliation(s)
- Lulu Zhao
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Qiwen Zhong
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Jian Tian
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Mengqi Luo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Lin Guo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| |
Collapse
|
4
|
Budnikov AS, Krylov I, Lastovko AV, Yu B, Terent'ev AO. N‐Alkoxyphtalimides as Versatile Alkoxy Radical Precursors in Modern Organic Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alexander S. Budnikov
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory for Studies of Homolytic Reactions RUSSIAN FEDERATION
| | - Igor Krylov
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory for Studies of Homolytic Reactions Leninsky Prospect, 47 119991 Moscow RUSSIAN FEDERATION
| | - Andrey V. Lastovko
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory for Studies of Homolytic Reactions RUSSIAN FEDERATION
| | - Bing Yu
- Zhengzhou University Green Catalysis Center CHINA
| | - Alexander O. Terent'ev
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory for Studies of Homolytic Reactions Leninsky prospekt 47 119991 Moscow RUSSIAN FEDERATION
| |
Collapse
|
5
|
He X, Zhao Y, Zhang Z, Shen X. Tuning the Reactivity of Alkoxyl Radicals from Cyclization to 1,2-Silyl Transfer: Stereoselective Synthesis of β-Substituted Cycloalcohols. Org Lett 2022; 24:1991-1995. [DOI: 10.1021/acs.orglett.2c00428] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Xingyi He
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Yunlong Zhao
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Zeguo Zhang
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xiao Shen
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| |
Collapse
|
6
|
Banoun C, Bourdreux F, Magnier E, Dagousset G. Intermolecular C-O Bond Formation with Alkoxyl Radicals: Photoredox-Catalyzed α-Alkoxylation of Carbonyl Compounds. Org Lett 2021; 23:8926-8930. [PMID: 34709834 DOI: 10.1021/acs.orglett.1c03444] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Due to the high reactivity of alkoxyl (RO·) radicals and their propensity to easily undergo β-scission or Hydrogen Atom Transfer (HAT) reactions, intermolecular alkoxylations involving RO· radicals are barely described. We report herein for the first time the efficient intermolecular trapping of alkoxyl radicals by silyl enol ethers. This photoredox-mediated protocol enables the introduction of both structurally simple and more complex alkoxy groups into a wide range of ketones and amides.
Collapse
Affiliation(s)
- Camille Banoun
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 78035 Versailles Cedex, France
| | - Flavien Bourdreux
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 78035 Versailles Cedex, France
| | - Emmanuel Magnier
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 78035 Versailles Cedex, France
| | - Guillaume Dagousset
- Université Paris-Saclay, UVSQ, CNRS, UMR 8180 Institut Lavoisier de Versailles, 78035 Versailles Cedex, France
| |
Collapse
|
7
|
Photocatalytic
Anti
‐Markovnikov Radical Hydro‐ and Aminooxygenation of Unactivated Alkenes Tuned by Ketoxime Carbonates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
8
|
Lai SQ, Wei BY, Wang JW, Yu W, Han B. Photocatalytic Anti-Markovnikov Radical Hydro- and Aminooxygenation of Unactivated Alkenes Tuned by Ketoxime Carbonates. Angew Chem Int Ed Engl 2021; 60:21997-22003. [PMID: 34255913 DOI: 10.1002/anie.202107118] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/29/2021] [Indexed: 11/05/2022]
Abstract
A tunable photocatalytic method is reported for anti-Markovnikov hydro- and aminooxygenation of unactivated alkenes using readily accessible ketoxime carbonates as the diverse functionalization reagents. Mechanistic studies reveal that this reaction is initiated through an energy-transfer-promoted N-O bond homolysis of ketoxime carbonates leading to alkoxylcarbonyloxyl and iminyl radicals under visible-light photocatalysis, followed by the addition of alkoxylcarbonyloxyl radical to alkenes. By taking advantage of the different stability of the iminyl radicals, the generated carbon radical either abstracts a hydrogen atom from the media to form the anti-Markovnikov hydrooxygenation product, or it is trapped by the persistent iminyl radical to furnish the aminooxygenation product. Notably, this is the first example of direct hydrooxygenation of unactivated olefins with anti-Markovnikov regioselectivity involving an oxygen-centered radical.
Collapse
Affiliation(s)
- Sheng-Qiang Lai
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Bang-Yi Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jia-Wei Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| |
Collapse
|
9
|
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.
Collapse
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
| |
Collapse
|
10
|
Anderson TE, Andia AA, Woerpel KA. Chemiluminescence-promoted oxidation of alkyl enol ethers by NHPI under mild conditions and in the dark. Tetrahedron 2021; 82:131874. [PMID: 33994596 PMCID: PMC8117068 DOI: 10.1016/j.tet.2020.131874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The hydroperoxidation of alkyl enol ethers using N-hydroxyphthalimide and molecular oxygen occurred in the absence of catalyst, initiator, or light. The reaction proceeds through a radical mechanism that is initiated by N-hydroxyphthalimide-promoted autoxidation of the enol ether substrate. The resulting dioxetane products decompose in a chemiluminescent reaction that allows for photochemical activation of N-hydroxyphthalimide in the absence of other light sources.
Collapse
Affiliation(s)
- T. E. Anderson
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, United States
| | - Alexander A. Andia
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, United States
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, United States
| |
Collapse
|
11
|
Liang W, Cai X, Dai M. Cu-catalyzed hydroxycyclopropanol ring-opening cyclization to tetrahydrofurans and tetrahydropyrans: short total syntheses of hyperiones. Chem Sci 2020; 12:1311-1316. [PMID: 34163894 PMCID: PMC8179039 DOI: 10.1039/d0sc05556e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Tetrahydrofurans (THFs) and tetrahydropyrans (THPs) are important core scaffolds frequently found in many molecules of medicinal importance. Herein, we report a novel copper-catalyzed hydroxycyclopropanol ring-opening cyclization methodology to synthesize di- or tri-substituted THFs and THPs. In this reaction, a strained C–C bond was cleaved and a new Csp3–O bond was formed to produce the aforementioned O-heterocycles. The new THF synthesis features a broad substrate scope, scalability, and good functional-group tolerability. It enabled us to complete the shortest enantioselective syntheses of hyperiones A and B (3 and 4 steps, respectively), which is significantly shorter than the previously reported two total syntheses (≥10 steps). A novel Cu-catalyzed hydroxycyclopropanol ring-opening cyclization was developed to synthesize substituted tetrahydrofuran/tetrahydropyran molecules including two norlignan natural products hyperiones A and B.![]()
Collapse
Affiliation(s)
- Weida Liang
- Department of Chemistry and Center for Cancer Research, Purdue University West Lafayette IN 47907 USA
| | - Xinpei Cai
- Department of Chemistry and Center for Cancer Research, Purdue University West Lafayette IN 47907 USA
| | - Mingji Dai
- Department of Chemistry and Center for Cancer Research, Purdue University West Lafayette IN 47907 USA
| |
Collapse
|
12
|
Tsui E, Wang H, Knowles RR. Catalytic generation of alkoxy radicals from unfunctionalized alcohols. Chem Sci 2020; 11:11124-11141. [PMID: 33384861 PMCID: PMC7747465 DOI: 10.1039/d0sc04542j] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022] Open
Abstract
Alkoxy radicals have long been recognized as powerful synthetic intermediates with well-established reactivity patterns. Due to the high bond dissociation free energy of aliphatic alcohol O-H bonds, these radicals are difficult to access through direct homolysis, and conventional methods have instead relied on activation of O-functionalized precursors. Over the past decade, however, numerous catalytic methods for the direct generation of alkoxy radicals from simple alcohol starting materials have emerged and created opportunities for the development of new transformations. This minireview discusses recent advances in catalytic alkoxy radical generation, with particular emphasis on progress toward the direct activation of unfunctionalized alcohols enabled by transition metal and photoredox catalysis.
Collapse
Affiliation(s)
- Elaine Tsui
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
| | - Huaiju Wang
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
| | - Robert R Knowles
- Department of Chemistry , Princeton University , Princeton , NJ 08544 , USA .
| |
Collapse
|
13
|
Shu C, Madhavachary R, Noble A, Aggarwal VK. Photoinduced Fragmentation Borylation of Cyclic Alcohols and Hemiacetals. Org Lett 2020; 22:7213-7218. [PMID: 32903015 DOI: 10.1021/acs.orglett.0c02513] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chao Shu
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | | | - Adam Noble
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| | - Varinder K. Aggarwal
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K
| |
Collapse
|
14
|
Tsui E, Metrano AJ, Tsuchiya Y, Knowles RR. Catalytic Hydroetherification of Unactivated Alkenes Enabled by Proton-Coupled Electron Transfer. Angew Chem Int Ed Engl 2020; 59:11845-11849. [PMID: 32227658 PMCID: PMC7451027 DOI: 10.1002/anie.202003959] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 03/28/2020] [Indexed: 12/22/2022]
Abstract
We report a catalytic, light-driven method for the intramolecular hydroetherification of unactivated alkenols to furnish cyclic ether products. These reactions occur under visible-light irradiation in the presence of an IrIII -based photoredox catalyst, a Brønsted base catalyst, and a hydrogen-atom transfer (HAT) co-catalyst. Reactive alkoxy radicals are proposed as key intermediates, generated by direct homolytic activation of alcohol O-H bonds through a proton-coupled electron-transfer mechanism. This method exhibits a broad substrate scope and high functional-group tolerance, and it accommodates a diverse range of alkene substitution patterns. Results demonstrating the extension of this catalytic system to carboetherification reactions are also presented.
Collapse
Affiliation(s)
- Elaine Tsui
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Anthony J Metrano
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Yuto Tsuchiya
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Robert R Knowles
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| |
Collapse
|
15
|
Tsui E, Metrano AJ, Tsuchiya Y, Knowles RR. Catalytic Hydroetherification of Unactivated Alkenes Enabled by Proton‐Coupled Electron Transfer. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003959] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Elaine Tsui
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | | | - Yuto Tsuchiya
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | | |
Collapse
|
16
|
Chatgilialoglu C, Ferreri C, Landais Y, Timokhin VI. Thirty Years of (TMS)3SiH: A Milestone in Radical-Based Synthetic Chemistry. Chem Rev 2018; 118:6516-6572. [DOI: 10.1021/acs.chemrev.8b00109] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Carla Ferreri
- ISOF, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129 Bologna, Italy
| | - Yannick Landais
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence Cedex, France
| | - Vitaliy I. Timokhin
- Department of Biochemistry, University of Wisconsin-Madison, 1552 University Avenue, Madison, Wisconsin 53726, United States
| |
Collapse
|
17
|
León EI, Martín A, Pérez-Martín I, Suárez E. Reductive Radical Cascades Triggered by Alkoxyl Radicals in the β-Cyclodextrin Framework. Org Lett 2018; 20:3385-3389. [DOI: 10.1021/acs.orglett.8b01308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Elisa I. León
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Angeles Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Inés Pérez-Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Ernesto Suárez
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| |
Collapse
|
18
|
Li Y, Zhang J, Li D, Chen Y. Metal-Free C(sp3)–H Allylation via Aryl Carboxyl Radicals Enabled by Donor–Acceptor Complex. Org Lett 2018; 20:3296-3299. [DOI: 10.1021/acs.orglett.8b01172] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jing Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Defang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| | - Yiyun Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| |
Collapse
|
19
|
Heteroatom-Centred Radicals for the Synthesis of Heterocyclic Compounds. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2018_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
20
|
Syroeshkin MA, Krylov IB, Hughes AM, Alabugin IV, Nasybullina DV, Sharipov MY, Gultyai VP, Terent'ev AO. Electrochemical behavior of N
-oxyphthalimides: Cascades initiating self-sustaining catalytic reductive N
―O
bond cleavage. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3744] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| | - Igor B. Krylov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| | - Audrey M. Hughes
- Department of Chemistry and Biochemistry; Florida State University; Tallahassee FL USA
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry; Florida State University; Tallahassee FL USA
| | - Darya V. Nasybullina
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| | - Mikhail Yu. Sharipov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| | - Vadim P. Gultyai
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Moscow Russian Federation
| |
Collapse
|
21
|
Harris T, Gomes GDP, Clark RJ, Alabugin IV. Domino Fragmentations in Traceless Directing Groups of Radical Cascades: Evidence for the Formation of Alkoxy Radicals via C–O Scission. J Org Chem 2016; 81:6007-17. [DOI: 10.1021/acs.joc.6b01052] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Trevor Harris
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Gabriel dos Passos Gomes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Ronald J. Clark
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| |
Collapse
|
22
|
Pordanjani HM, Faderl C, Wang J, Motti CA, Junk PC, Oelgemöller M. Photodecarboxylative Benzylations of N-Methoxyphthalimide under Batch and Continuous-Flow Conditions. Aust J Chem 2015. [DOI: 10.1071/ch15356] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A series of photodecarboxylative benzylations of N-methoxyphthalimide were successfully realised using easily accessible starting materials. The reactions proceeded smoothly and the corresponding benzylated hydroxyphthalimidines were obtained in moderate to good yields of 52–73 %. No competing photoinduced dealkoxylation of the N-methoxy group was observed. The reaction with potassium phenylacetate was subsequently investigated in an advanced continuous-flow photoreactor. The reactor allowed rapid optimization of the reaction conditions and gave the desired benzylated product in higher yield and shorter irradiation time compared with the batch process.
Collapse
|
23
|
Giglio BC, Alexanian EJ. Alkene Hydrofunctionalization Using Hydroxamic Acids: A Radical-Mediated Approach to Alkene Hydration. Org Lett 2014; 16:4304-7. [DOI: 10.1021/ol5020202] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Benjamin C. Giglio
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Erik J. Alexanian
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| |
Collapse
|
24
|
Rueda-Becerril M, Leung JCT, Dunbar CR, Sammis GM. Alkoxy radical cyclizations onto silyl enol ethers relative to alkene cyclization, hydrogen atom transfer, and fragmentation reactions. J Org Chem 2011; 76:7720-9. [PMID: 21819036 DOI: 10.1021/jo200992m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study examines the chemoselectivity of alkoxy radical cyclizations onto silyl enol ethers compared to competing cyclizations, 1,5-hydrogen atom transfers (1,5-HATs), and β-fragmentations. Cyclization onto silyl enol ethers in a 5-exo mode is greatly preferred over cyclization onto a terminal alkene. The selectivity decreases when any alkyl substitution is present on the competing alkene radical acceptor. Alkoxy radical 5-exo cyclizations displayed excellent chemoselectivity over competing β-fragmentations. Alkoxy radical 5-exo cyclizations onto silyl enol ether also outcompeted 1,5-HATs, even for activated benzylic hydrogen atoms. In tetrahydropyran synthesis, where 1,5-HAT has plagued alkoxy radical cyclization methodologies, 6-exo cyclizations were the dominant mode of reactivity. β-Fragmentation still remains a challenge for tetrahydropyran synthesis when an aryl group is present in the β position.
Collapse
Affiliation(s)
- Montserrat Rueda-Becerril
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | | | | | | |
Collapse
|
25
|
Gilmore K, Alabugin IV. Cyclizations of Alkynes: Revisiting Baldwin’s Rules for Ring Closure. Chem Rev 2011; 111:6513-56. [DOI: 10.1021/cr200164y] [Citation(s) in RCA: 387] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Kerry Gilmore
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida, 32306-4390
| |
Collapse
|
26
|
Giglio BC, Schmidt VA, Alexanian EJ. Metal-Free, Aerobic Dioxygenation of Alkenes Using Simple Hydroxamic Acid Derivatives. J Am Chem Soc 2011; 133:13320-2. [DOI: 10.1021/ja206306f] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin C. Giglio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Valerie A. Schmidt
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Erik J. Alexanian
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| |
Collapse
|
27
|
Schmidt V, Alexanian E. Metal-Free, Aerobic Dioxygenation of Alkenes Using Hydroxamic Acids. Angew Chem Int Ed Engl 2010; 49:4491-4. [DOI: 10.1002/anie.201000843] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
28
|
Schmidt V, Alexanian E. Metal-Free, Aerobic Dioxygenation of Alkenes Using Hydroxamic Acids. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000843] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
29
|
Zlotorzynska M, Zhai H, Sammis GM. Unique Diastereoselectivity Trends in Aminyl Radical Cyclizations onto Silyl Enol Ethers. J Org Chem 2009; 75:864-72. [DOI: 10.1021/jo902426z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maria Zlotorzynska
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Huimin Zhai
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Glenn M. Sammis
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| |
Collapse
|
30
|
Hopper DW, Crombie AL, Clemens JJ, Kwon S. Chapter 6.1: Six-Membered Ring Systems: Pyridine and Benzo Derivatives. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70039-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
31
|
Zhai H, Zlotorzynska M, Sammis G. Construction of protected hydroxylated pyrrolidines using nitrogen-centered radical cyclizations. Chem Commun (Camb) 2009:5716-8. [DOI: 10.1039/b914757h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
32
|
Hou XL, Yang Z, Yeung KS, Wong HN. Chapter 5.3: Five-Membered Ring Systems: Furans and Benzofurans. PROGRESS IN HETEROCYCLIC CHEMISTRY 2009. [DOI: 10.1016/s0959-6380(09)70034-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|