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Anosike IS, Beng TK. Harnessing the 1,3-azadiene-anhydride reaction for the regioselective and stereocontrolled synthesis of lactam-fused bromotetrahydropyrans by bromoetherification of lactam-tethered trisubstituted tertiary alkenols. RSC Adv 2024; 14:18501-18507. [PMID: 38860240 PMCID: PMC11163878 DOI: 10.1039/d4ra02523g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024] Open
Abstract
Halo-cycloetherification of lactam-tethered alkenols enables the construction of oxygen-heterocycles that are fused to nitrogen heterocycles via intramolecular halonium-induced nucleophilic addition. Specifically, tetrahydropyrans (THPs) that are fused to a nitrogen heterocycle constitute the core of several bioactive molecules, including tachykinin receptor antagonists and alpha-1 adrenergic antagonists. Although the literature is replete with successful examples of the halo-cycloetherification of simple mono- or disubstituted primary alkenols, methods for the modular, efficient, regioselective, and stereocontrolled intramolecular haloetherification of sterically encumbered trisubstituted tertiary alkenols are rare. Here, we describe a simple intramolecular bromoetherification strategy that meets these benchmarks and proceeds with exclusive 6-endo regioselectivity. The transformation employs mild and water-tolerant conditions, which bodes well for late-stage diversification. The hindered ethers contain four contiguous stereocenters as well as one halogen-bearing tetrasubstituted stereocenter.
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Affiliation(s)
- Ifeyinwa S Anosike
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
| | - Timothy K Beng
- Department of Chemistry, Central Washington University Ellensburg WA 98926 USA
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2
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Wang F, Pan S, Zhu S, Chu L. Selective Three-Component Reductive Alkylalkenylation of Unbiased Alkenes via Carbonyl-Directed Nickel Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Fang Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Shiwei Pan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Shengqing Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Lingling Chu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
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3
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Kumar S, Shah TA, Punniyamurthy T. Recent advances in the application of tetrabromomethane in organic synthesis. Org Chem Front 2021. [DOI: 10.1039/d0qo01369b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review article covers the use of tetrabromomethane as mediator, catalyst and reagents for organic synthesis for the period from 2007 to 2020.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry
- DAV University
- Jalandhar-144012
- India
| | - Tariq A. Shah
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
- Department of Chemistry
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4
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Talukdar R. Tracking down the brominated single electron oxidants in recent organic red-ox transformations: photolysis and photocatalysis. Org Biomol Chem 2020; 18:8294-8345. [PMID: 33020775 DOI: 10.1039/d0ob01652g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A wide range of organic and inorganic brominated compounds including molecular bromine have been extensively used as oxidants in many organic photo-redox transformations in recent years, an area of ever growing interest because of greener and milder approaches. The oxidation power of these compounds is utilized through both mechanistic pathways (by hydrogen atom transfer or HAT in the absence of a photocatalyst and a combination of single electron transfer or SET and/or HAT in the presence of a photocatalyst). Not only as terminal oxidants for regeneration of photocatalysts, but brominated reactants have also contributed to the oxidation of the reaction intermediate(s) to carry on the radical chain process in several reactions. Here in this review mainly the non-brominative oxidative product formations are discussed, carried out since the last two decades, skipping the instances where they acted as terminal oxidants only to regenerate photocatalysts. The reactions are used to generate natural products, pharmaceuticals and beyond.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India.
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5
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Lu XY, Li JS, Wang JY, Wang SQ, Li YM, Zhu YJ, Zhou R, Ma WJ. Cu-catalyzed cross-coupling reactions of vinyl epoxide with organoboron compounds: access to homoallylic alcohols. RSC Adv 2018; 8:41561-41565. [PMID: 35559282 PMCID: PMC9092012 DOI: 10.1039/c8ra09048c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/28/2018] [Indexed: 12/31/2022] Open
Abstract
Copper-catalyzed cross-coupling reactions of vinyl epoxide with arylboronates to obtain aryl-substituted homoallylic alcohols are described. The reaction selectivity was different to that of previously reported vinyl epoxide ring-opening reactions using aryl nucleophiles. The reaction proceeded under mild conditions, affording aryl-substituted homoallylic alcohols with high selectivity and in good to excellent yields. The reaction provides convenient access to aryl-substituted homoallylic alcohols from vinyl epoxide.
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Affiliation(s)
- Xiao-Yu Lu
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
- School of Chemistry and Chemical Engineering, AnHui University Hefei 230601 China
| | - Jin-Song Li
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Jin-Yu Wang
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Shi-Qun Wang
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Yue-Ming Li
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Yu-Jing Zhu
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Ran Zhou
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
| | - Wen-Jing Ma
- College of Materials and Chemical Engineering, Chuzhou University Hui Feng Road 1 Chuzhou 239000 P. R. China
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6
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Tripathi S, Yadav LDS. Visible-light-enabled denitrative carboxylation of β-nitrostyrenes: a direct photocatalytic approach to cinnamic acids. NEW J CHEM 2018. [DOI: 10.1039/c7nj04578f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A novel, highly stereoselective synthesis of (E)-cinnamic acids from β-nitrostyrenes and CBr4employing visible light photoredox catalysis has been developed.
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Affiliation(s)
- Shubhangi Tripathi
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad – 211002
- India
| | - Lal Dhar S. Yadav
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad – 211002
- India
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7
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Rackl D, Kais V, Lutsker E, Reiser AO. Synthesis of Chiral Tetrahydrofurans and Pyrrolidines by Visible-Light-Mediated Deoxygenation. European J Org Chem 2017; 2017:2130-2138. [PMID: 28529446 PMCID: PMC5412674 DOI: 10.1002/ejoc.201700014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Indexed: 11/12/2022]
Abstract
The synthesis of chiral tetrahydrofurans and pyrrolidines starting from 1,2-diols or β-amino alcohols, respectively, by visible-light-mediated deoxygenation is described. Easily accessible monoallylated/propargylated substrates were activated either as inexpensive ethyl oxalates or as recyclable 3,5-bis(trifluoromethyl)benzoates to generate alkyl radicals suitable for 5-exo-trig/5-exo-dig cyclizations under visible-light irradiation.
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Affiliation(s)
- Daniel Rackl
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - Viktor Kais
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - Eugen Lutsker
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - And Oliver Reiser
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
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8
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Lin R, Sun H, Yang C, Xia W. Visible‐Light‐Induced Intramolecular Chloroetherfication of Electron‐Enriched Styrenes. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600441] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Run Lin
- State Key Lab of Urban Water Resource and Environmentthe Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of Technology Harbin 150080 P. R. China
| | - Hongnan Sun
- State Key Lab of Urban Water Resource and Environmentthe Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of Technology Harbin 150080 P. R. China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environmentthe Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of Technology Harbin 150080 P. R. China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environmentthe Academy of Fundamental and Interdisciplinary SciencesHarbin Institute of Technology Harbin 150080 P. R. China
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9
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Moriyama K, Nishinohara C, Togo H. Magnesium Lewis Acid Assisted Oxidative Bromoetherification Involving Bromine Transfer from Alkyl Bromides with Aldehydes by Umpolung of Bromide. Chemistry 2016; 22:11934-9. [PMID: 27304660 DOI: 10.1002/chem.201602055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Indexed: 11/11/2022]
Abstract
An oxidative bromoetherification involving a bromine transfer from alkyl bromides upon reacting them with aldehydes in a Grignard reaction with a concurrent oxidation of bromide was developed to provide substituted tetrahydrofurans in high yields. This reaction, which proceeds through two types of bromine transfer, was promoted by the addition of a Brønsted acid. Mechanistic studies suggested that a magnesium Lewis acid activates hypobromate, which is generated in situ from the reaction of bromide and Oxone to improve the electrophilicity of the bromonium ion (Br(+) ) for the oxidative bromoetherification of alkenyl alcohols. Furthermore, the magnesium Lewis acid catalyzed oxidative bromoetherification of an alkenyl alcohol proceeded to provide a cyclization product in 92 % yield.
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Affiliation(s)
- Katsuhiko Moriyama
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| | - Chihiro Nishinohara
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Hideo Togo
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
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10
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Feng L, Yan H, Yang C, Chen D, Xia W. Visible-Light Induced Direct Synthesis of Polysubstituted Furans from Cyclopropyl Ketones. J Org Chem 2016; 81:7008-22. [PMID: 27167091 DOI: 10.1021/acs.joc.6b00436] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this article, a photoredox protocol for the synthesis of furans via oxidative coupling of olefin generated in situ from cyclopropyl ketones with ketonic oxygen atom is presented. Moreover, bromination of furans in the presence of overstoichiometric oxidant has been achieved with high regioselectivity.
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Affiliation(s)
- Liyan Feng
- State Key Lab of Urban Water Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology , Harbin 150080 China
| | - Hang Yan
- State Key Lab of Urban Water Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology , Harbin 150080 China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology , Harbin 150080 China
| | - Dafa Chen
- State Key Lab of Urban Water Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology , Harbin 150080 China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, Shenzhen Graduate School, Harbin Institute of Technology , Harbin 150080 China
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11
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Wang Y, Jiang M, Liu JT. Copper-Catalyzed Diastereoselective Synthesis of Trifluoromethylated Tetrahydrofurans. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501166] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Yang QQ, Marchini M, Xiao WJ, Ceroni P, Bandini M. Visible-Light-Induced Direct Photocatalytic Carboxylation of Indoles with CBr4/MeOH. Chemistry 2015; 21:18052-6. [DOI: 10.1002/chem.201503787] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Indexed: 01/05/2023]
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13
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Angnes RA, Li Z, Correia CRD, Hammond GB. Recent synthetic additions to the visible light photoredox catalysis toolbox. Org Biomol Chem 2015; 13:9152-67. [PMID: 26242759 DOI: 10.1039/c5ob01349f] [Citation(s) in RCA: 171] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The boom in visible light photoredox catalysis (VLPC) research has demonstrated that this novel synthetic approach is here to stay. VLPC enables reactive radical intermediates to be catalytically generated at ambient temperature, a feat not generally allowed through traditional pyrolysis- or radical initiator-based methodologies. VLPC has vastly extended the range of substrates and reaction schemes that have been traditionally the domain of radical reactions. In this review the photophysics background of VLPC will be briefly discussed, followed by a report on recent inroads of VLPC into decarboxylative couplings and radical C-H functionalization of aromatic compounds. The bulk of the review will be dedicated to advances in synergistic catalysis involving VLPC, namely the combination of photoredox catalysis with organocatalysis, including β-functionalization of carbonyl groups, functionalization of weak aliphatic C-H bonds, and anti-Markovnikov hydrofunctionalization of alkenes; dual catalysis with gold or with nickel, photoredox catalysis as an oxidation promoter in transition metal catalysis, and acid-catalyzed enantioselective radical addition to π systems.
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Affiliation(s)
- Ricardo A Angnes
- Chemistry Institute, State University of Campinas - Unicamp C.P. 6154, CEP. 13083-970, Campinas, São Paulo, Brazil
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