1
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Dang VQ, Teets TS. Reductive photoredox transformations of carbonyl derivatives enabled by strongly reducing photosensitizers. Chem Sci 2023; 14:9526-9532. [PMID: 37712019 PMCID: PMC10498680 DOI: 10.1039/d3sc03000h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 08/18/2023] [Indexed: 09/16/2023] Open
Abstract
Visible-light photoredox catalysis is well-established as a powerful and versatile organic synthesis strategy. However, some substrate classes, despite being attractive precursors, are recalcitrant to single-electron redox chemistry and thus not very amenable to photoredox approaches. Among these are carbonyl derivatives, e.g. ketones, aldehydes, and imines, which in most cases require Lewis or Brønsted acidic additives to activate via photoinduced electron transfer. In this work, we unveil a range of photoredox transformations on ketones and imines, enabled by strongly reducing photosensitizers and operating under simple, general conditions with a single sacrificial reductant and no additives. Specific reactions described here are umpolung C-C bond forming reactions between aromatic ketones or imines and electron-poor alkenes, imino-pinacol homocoupling reactions of challenging alkyl-aryl imine substrates, and γ-lactonization reactions of aromatic ketones with methyl acrylate. The reactions are all initiated by photoinduced electron transfer to form a ketyl or iminyl that is subsequently trapped.
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Affiliation(s)
- Vinh Q Dang
- University of Houston, Department of Chemistry 3585 Cullen Blvd. Room 112 Houston TX 77204-5003 USA
| | - Thomas S Teets
- University of Houston, Department of Chemistry 3585 Cullen Blvd. Room 112 Houston TX 77204-5003 USA
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2
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Tang N, Zachmann RJ, Xie H, Zheng J, Breit B. Visible-light induced metal-free intramolecular reductive cyclisations of ketones with alkynes and allenes. Chem Commun (Camb) 2023; 59:2122-2125. [PMID: 36723349 DOI: 10.1039/d2cc06972e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A visible-light-induced, intramolecular, reductive cyclisation of ketones with an unsaturated hydrocarbon moiety was developed. In contrast to conventional protocols requiring resource precious or hazardous metal sources, this method enables facile access to ketyl radicals under metal-free and mild reaction conditions. By polarity-reversed, ketyl radical hydroalkoxylation of alkynes and allenes, a variety of five-membered (hetero-)cyclic products were generated in good yields with good to excellent stereoselectivities. The embedded homoallylic tertiary alcohol could be transformed into other useful functionalities, highlighting the synthetic utility of this reaction. This efficient and sustainable ketyl-alkyne/allene cross coupling also features broad functional group tolerance and scalability.
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Affiliation(s)
- Nana Tang
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, Freiburg im Breisgau 79104, Germany.
| | - Raphael J Zachmann
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, Freiburg im Breisgau 79104, Germany.
| | - Hui Xie
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, Freiburg im Breisgau 79104, Germany.
| | - Jun Zheng
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education; School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China.
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, Freiburg im Breisgau 79104, Germany.
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3
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Venditto NJ, Liang YS, El Mokadem RK, Nicewicz DA. Ketone-Olefin Coupling of Aliphatic and Aromatic Carbonyls Catalyzed by Excited-State Acridine Radicals. J Am Chem Soc 2022; 144:11888-11896. [PMID: 35737516 PMCID: PMC10031806 DOI: 10.1021/jacs.2c04822] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ketone-olefin coupling reactions are common methods for the formation of carbon-carbon bonds. This reaction class typically requires stoichiometric or super stoichiometric quantities of metal reductants, and catalytic variations are limited in application. Photoredox catalysis has offered an alternative method toward ketone-olefin coupling reactions, although most methods are limited in scope to easily reducible aromatic carbonyl compounds. Herein, we describe a mild, metal-free ketone-olefin coupling reaction using an excited-state acridine radical super reductant as a photoredox catalyst. We demonstrate both intramolecular and intermolecular ketone-olefin couplings of aliphatic and aromatic ketones and aldehydes. Mechanistic evidence is also presented supporting an "olefin first" ketone-olefin coupling mechanism.
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Affiliation(s)
- Nicholas J Venditto
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Yiyang S Liang
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Roukaya K El Mokadem
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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4
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Fan Y, You E, Xu Z, Lin W. A Substrate-Binding Metal-Organic Layer Selectively Catalyzes Photoredox Ene-Carbonyl Reductive Coupling Reactions. J Am Chem Soc 2021; 143:18871-18876. [PMID: 34738806 DOI: 10.1021/jacs.1c10180] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intermolecular photoredox ene-carbonyl reductive coupling reactions typically have low product selectivity owing to competing dimerization and/or reduction of ketyl radicals. Herein, we report a metal-organic layer (MOL), Hf-Ir-OTf, as a bifunctional photocatalyst for selective photoredox reductive coupling of ketones or aldehydes with electron-deficient alkenes. Composed of iridium-based photosensitizers (Ir-PSs) and triflated Hf12 clusters, Hf-Ir-OTf uses Lewis acidic Hf sites to bind and activate electron-deficient alkenes to accept ketyl radicals generated by adjacent Ir-PSs, thereby suppressing undesired dimerization and reduction of ketyl radicals to enhance the selectivity for the cross-coupling products. The MOL-catalyzed reductive coupling reaction accommodates a variety of olefinic substrates and tolerates reducible groups, nicely complementing current methods for cross-coupling reactions.
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Affiliation(s)
- Yingjie Fan
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Eric You
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ziwan Xu
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Wenbin Lin
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
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5
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Wang S, König B. Katalytische Erzeugung von Carbanionen durch Carbonyl‐Umpolung. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shun Wang
- Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Deutschland
| | - Burkhard König
- Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Deutschland
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6
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Divergent asymmetric synthesis of azaarene-functionalized cyclic alcohols through stereocontrolled Beckwith-Enholm cyclizations. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1019-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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7
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Liu C, Li R, Zhou W, Liang Y, Shi Y, Li RL, Ling Y, Yu Y, Li J, Zhang B. Selectivity Origin of Organic Electrosynthesis Controlled by Electrode Materials: A Case Study on Pinacols. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01382] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Cuibo Liu
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Rui Li
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Wei Zhou
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Yu Liang
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Yanmei Shi
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Run-Lai Li
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Yangfang Ling
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Yifu Yu
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
| | - Jianxin Li
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China
| | - Bin Zhang
- Institute of Molecular Plus, School of Science, Tianjin University, Tianjin 300072, China
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
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8
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Wang S, König B. Catalytic Generation of Carbanions through Carbonyl Umpolung. Angew Chem Int Ed Engl 2021; 60:21624-21634. [PMID: 33991000 PMCID: PMC8518712 DOI: 10.1002/anie.202105469] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Indexed: 12/16/2022]
Abstract
Carbonyl Umpolung is a powerful strategy in organic chemistry to construct complex molecules. Over the last few years, versatile catalytic approaches for the generation of acyl anion equivalents from carbonyl compounds have been developed, but methods to obtain alkyl carbanions from carbonyl compounds in a catalytic fashion are still at an early stage. This Minireview summarizes recent progress in the generation of alkyl carbanions through catalytic carbonyl Umpolung. Two different catalytic approaches can be utilized to enable the generation of alkyl carbanions from carbonyl compounds: the catalytic Wolff–Kishner reaction and the catalytic single‐electron reduction of carbonyl compounds and imines. We discuss the reaction scope, mechanistic insights, and synthetic applications of the methods as well as potential future developments.
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Affiliation(s)
- Shun Wang
- Faculty of Chemistry and Pharmacy University of Regensburg Universitaetsstrasse 31 93053 Regensburg Germany
| | - Burkhard König
- Faculty of Chemistry and Pharmacy University of Regensburg Universitaetsstrasse 31 93053 Regensburg Germany
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9
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Péter Á, Agasti S, Knowles O, Pye E, Procter DJ. Recent advances in the chemistry of ketyl radicals. Chem Soc Rev 2021; 50:5349-5365. [PMID: 33972956 PMCID: PMC8111543 DOI: 10.1039/d0cs00358a] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ketyl radicals are valuable reactive intermediates for synthesis and are used extensively to construct complex, functionalized products from carbonyl substrates. Single electron transfer (SET) reduction of the C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O bond of aldehydes and ketones is the classical approach for the formation of ketyl radicals and metal reductants are the archetypal reagents employed. The past decade has, however, witnessed significant advances in the generation and harnessing of ketyl radicals. This tutorial review highlights recent, exciting developments in the chemistry of ketyl radicals by comparing the varied contemporary – for example, using photoredox catalysts – and more classical approaches for the generation and use of ketyl radicals. The review will focus on different strategies for ketyl radical generation, their creative use in new synthetic protocols, strategies for the control of enantioselectivity, and detailed mechanisms where appropriate. Ketyl radicals are valuable reactive intermediates for synthesis. This review highlights exciting recent developments in the chemistry of ketyl radicals by comparing contemporary and more classical approaches for their generation and use.![]()
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Affiliation(s)
- Áron Péter
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, UK.
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10
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Han G, Liu X, Cao Z, Sun Y. Photocatalytic Pinacol C–C Coupling and Jet Fuel Precursor Production on ZnIn2S4 Nanosheets. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01715] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Guanqun Han
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Xingwu Liu
- Syncat@Beijing, Synfuels CHINA Company, Ltd., Beijing 101407, China
| | - Zhi Cao
- Syncat@Beijing, Synfuels CHINA Company, Ltd., Beijing 101407, China
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yujie Sun
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
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11
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Xia Q, Tian H, Dong J, Qu Y, Li L, Song H, Liu Y, Wang Q. N
-Arylamines Coupled with Aldehydes, Ketones, and Imines by Means of Photocatalytic Proton-Coupled Electron Transfer. Chemistry 2018; 24:9269-9273. [DOI: 10.1002/chem.201801886] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/14/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Qing Xia
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Hao Tian
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Yi Qu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Lili Li
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300071 P. R. China
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12
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Xu X, Min QQ, Li N, Liu F. Visible light-promoted umpolung coupling of aryl tri-/difluoroethanones with 2-alkenylpyridines. Chem Commun (Camb) 2018; 54:11017-11020. [DOI: 10.1039/c8cc06748a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A metal-free, mild, and simple protocol is developed for the synthesis of tertiary alcohols bearing tri-/difluoromethyl groups upon visible-light irradiation.
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Affiliation(s)
- Xiao Xu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Qing-Qiang Min
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Na Li
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
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13
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Lee KN, Ngai MY. Recent developments in transition-metal photoredox-catalysed reactions of carbonyl derivatives. Chem Commun (Camb) 2017; 53:13093-13112. [PMID: 29125152 PMCID: PMC5930931 DOI: 10.1039/c7cc06287g] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Single-electron reduction of C[double bond, length as m-dash]O and C[double bond, length as m-dash]N bonds of aldehydes, ketones, and imines results in the formation of ketyl and α-aminoalkyl anion radicals, respectively. These reactive intermediates are characterized by an altered electronic character with respect to their parent molecules and undergo a diverse range of synthetically useful transformations, which are not available to even-electron species. This Review summarizes the reactions of ketyl and α-aminyl radicals generated from carbonyl derivatives under transition-metal photoredox-catalysed conditions. We primarily focus on recent developments in the field, as well as give a brief overview of catalytic enantioselective transformations that provide a means to achieve precise stereocontrol over the reactivity of ion radicals.
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Affiliation(s)
- Katarzyna N Lee
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA.
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14
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Ramakrishna K, Arupula SK, Gudimella SK, Raju V, Nanubollu JB, Meshram HM. A Facile and Efficient Synthesis of Oxindole Scaffolds through Linear Regioselective Reductive Coupling between Vinyl Sulfones and Isatins/Isatinimines. ChemistrySelect 2017. [DOI: 10.1002/slct.201700738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- K. Ramakrishna
- Medicinal Chemistry and Pharmacology Division; Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Sanjeeva K. Arupula
- Medicinal Chemistry and Pharmacology Division; Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Santosh K. Gudimella
- Medicinal Chemistry and Pharmacology Division; Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - V. Raju
- Fluro-Organic Division; Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Jagadeesh B. Nanubollu
- Labortory of X -ray Crystallography; Indian Institute of Chemical Technology; Hyderabad- 500007 India
| | - Harshadas M. Meshram
- Medicinal Chemistry and Pharmacology Division; Indian Institute of Chemical Technology; Hyderabad- 500007 India
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15
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Lee KN, Lei Z, Ngai MY. β-Selective Reductive Coupling of Alkenylpyridines with Aldehydes and Imines via Synergistic Lewis Acid/Photoredox Catalysis. J Am Chem Soc 2017; 139:5003-5006. [PMID: 28358497 PMCID: PMC5623169 DOI: 10.1021/jacs.7b01373] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Umpolung (polarity reversal) strategies of aldehydes and imines have dramatically expanded the scope of carbonyl and iminyl chemistry by facilitating reactions with non-nucleophilic reagents. Herein, we report the first visible light photoredox-catalyzed β-selective reductive coupling of alkenylpyridines with carbonyl or iminyl derivatives with the aid of a Lewis acid co-catalyst. Our process tolerates complex molecular scaffolds (e.g., sugar, natural product, and peptide derivatives) and is applicable to the preparation of compounds containing a broad range of heterocyclic moieties. Mechanistic investigations indicate that the key step involves single-electron-transfer reduction of aldehydes or imines followed by the addition of resulting ketyl or α-aminoalkyl radicals to Lewis acid-activated alkenylpyridines.
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Zheng YL, Liu YY, Wu YM, Wang YX, Lin YT, Ye M. Iron-Catalyzed Regioselective Transfer Hydrogenative Couplings of Unactivated Aldehydes with Simple Alkenes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602130] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yan-Long Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Yan-Yao Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Yi-Mei Wu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Yin-Xia Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Yu-Tong Lin
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
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17
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Zheng YL, Liu YY, Wu YM, Wang YX, Lin YT, Ye M. Iron-Catalyzed Regioselective Transfer Hydrogenative Couplings of Unactivated Aldehydes with Simple Alkenes. Angew Chem Int Ed Engl 2016; 55:6315-8. [PMID: 27072872 DOI: 10.1002/anie.201602130] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/12/2022]
Abstract
An FeBr3 -catalyzed reductive coupling of various aldehydes with alkenes that proceeds through a direct hydride transfer pathway has been developed. With (i) PrOH as the hydrogen donor under mild conditions, previously challenging coupling reactions of unactivated alkyl and aryl aldehydes with simple alkenes, such as styrene derivatives and α-olefins, proceeded smoothly to furnish a diverse range of functionalized alcohols with complete linear regioselectivity.
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Affiliation(s)
- Yan-Long Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Yan-Yao Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Yi-Mei Wu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Yin-Xia Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Yu-Tong Lin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China. .,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China.
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Streuff J, Gansäuer A. Metal-Catalyzed β-Functionalization of Michael Acceptors through Reductive Radical Addition Reactions. Angew Chem Int Ed Engl 2015; 54:14232-42. [PMID: 26471460 DOI: 10.1002/anie.201505231] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 01/18/2023]
Abstract
Transition-metal-catalyzed radical reactions are becoming increasingly important in modern organic chemistry. They offer fascinating and unconventional ways for connecting molecular fragments that are often complementary to traditional methods. In particular, reductive radical additions to α,β-unsaturated compounds have recently gained substantial attention as a result of their broad applicability in organic synthesis. This Minireview critically discusses the recent landmark achievements in this field in context with earlier reports that laid the foundation for today's developments.
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Affiliation(s)
- Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany).
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn (Germany).
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Streuff J, Gansäuer A. Metallkatalysierte β-Funktionalisierung von Michael-Akzeptoren über reduktive Radikaladditionen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505231] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Kumar AS, Ramesh P, Kumar GS, Nanubolu JB, Rao TP, Meshram HM. Indium/Fe(iii) – mediated regioselective β-cross-coupling aldol type addition reaction of activated alkenes with isatins/isatinimines in aqueous media. RSC Adv 2015. [DOI: 10.1039/c5ra07216f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A highly efficient and regioselective β-cross coupling aldol type addition reaction of activated alkenes with isatin/isatinimine derivatives in the presence of Indium/Fe(iii) in THF/H2O at room temperature is described.
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Affiliation(s)
- A. Sanjeeva Kumar
- Medicinal Chemistry and Pharmacology Division
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Palakuri Ramesh
- Medicinal Chemistry and Pharmacology Division
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - G. Santosh Kumar
- Medicinal Chemistry and Pharmacology Division
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-ray Crystallography
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - T. Prabhakar Rao
- Center for NMR and SC
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
| | - H. M. Meshram
- Medicinal Chemistry and Pharmacology Division
- Indian Institute of Chemical Technology
- Hyderabad 500 007
- India
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Santhoshkumar R, Mannathan S, Cheng CH. Cobalt-Catalyzed Hydroarylative Cyclization of 1,6-Enynes with Aromatic Ketones and Esters via C–H Activation. Org Lett 2014; 16:4208-11. [DOI: 10.1021/ol501904e] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | - Chien-Hong Cheng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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Yeh CH, Lin YC, Mannathan S, Hung K, Cheng CH. Ene-Carbonyl Reductive Coupling for the Synthesis of 3,3-Disubstituted Phthalide, 3-Hydroxyisoindolin-1-one and 3-Hydroxyoxindole Derivatives. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300973] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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