1
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Badufle M, Robert F, Landais Y. Visible light mediated iron-catalyzed addition of oxamic acids to imines. RSC Adv 2024; 14:12528-12532. [PMID: 38638815 PMCID: PMC11024671 DOI: 10.1039/d4ra02258k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024] Open
Abstract
Oxamic acids where shown to add to imines, providing a broad range of α-aminoacid amides in generally good yields. The process is efficient on pre-formed imines but may also be conducted using a 3-component strategy by simply mixing aldehydes, amines and oxamic acids in the presence of ferrocene, acting both as a photocatalyst under visible light and as a Lewis acid. The reaction proceeds through the addition onto the imine of a carbamoyl radical intermediate generated through a charge transfer from the carboxylate ligand to a Fe(iii) species (LMCT).
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Affiliation(s)
- Margaux Badufle
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 F-33400 Talence France
| | - Frédéric Robert
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 F-33400 Talence France
| | - Yannick Landais
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255 F-33400 Talence France
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2
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Liu S, Zhao C, Pan M, Liao H, Liu Y, Zhang J, Rong L. Copper(I)-Catalyzed Radical Carbamylation/Cyclization of 2-Aryl- N-methacryloylindoles with Substituted Formamides to Assemble Amidated Indolo[2,1- a]isoquinolin-6(5 H)-ones. J Org Chem 2023; 88:16352-16364. [PMID: 37971731 DOI: 10.1021/acs.joc.3c01856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
An efficient synthesis of amidated indolo[2,1-a]isoquinolin-6(5H)-ones has been achieved via copper(I)-catalyzed radical carbamylation/cyclization of 2-aryl-N-methacryloylindoles with substituted formamides. In this reaction, an isoquinoline ring was constructed by carbamylation of a carbon-carbon double bond in 2-arylindoles. This strategy successfully introduces the substituted amide group into the indolo[2,1-a]isoquinoline skeleton and has advantages such as wide substituent scope, mild reaction conditions, high regioselectivity, and good to excellent yields.
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Affiliation(s)
- Shengjun Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Congcong Zhao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Mei Pan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Hailin Liao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Yun Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
| | - Jinpeng Zhang
- Key Lab of Environment and Health, School of Public Health, Xuzhou Medical University, Xuzhou 221006, Jiangsu, PR China
| | - Liangce Rong
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, PR China
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3
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Jing Q, Qiao FC, Sun J, Wang JY, Zhou MD. Persulfate promoted carbamoylation of N-arylacrylamides and N-arylcinnamamides with 4-carbamoyl-Hantzsch esters. Org Biomol Chem 2023; 21:7530-7534. [PMID: 37674373 DOI: 10.1039/d3ob01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Carbamoyl-Hantzsch esters were used as carbamoyl radical precursors for oxidative carbamoylation of N-arylacrylamides and N-arylcinnamamides in the presence of inexpensive persulfates. This protocol can be applied to a broad range of substrates with various functional groups, providing a variety of 3,3-disubstituted oxindoles and 3,4-disubstituted dihydroquinolin-2(1H)-ones in moderate to good yields via an intermolecular addition/cyclization process.
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Affiliation(s)
- Qi Jing
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Fu-Ci Qiao
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Jing Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Jing-Yun Wang
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Ming-Dong Zhou
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
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4
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Perumal K, Lee J, Annes SB, Ramesh S, Rangarajan TM, Mathew B, Kim H. An efficient method to access spiro pseudoindoxyl ketones: evaluation of indoxyl and their N-benzylated derivatives for inhibition of the activity of monoamine oxidases. RSC Adv 2023; 13:24925-24935. [PMID: 37614797 PMCID: PMC10442599 DOI: 10.1039/d3ra03641c] [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: 05/31/2023] [Accepted: 08/03/2023] [Indexed: 08/25/2023] Open
Abstract
A simple, metal-free approach was developed to obtain novel pseudoindoxyl derivatives. The reaction was mediated by tBuOK on tetrahydrocarbazole 8 in dimethyl sulfoxide (DMSO) at room temperature through the hydroxylation of the indole double bond and a subsequent pinacol-type rearrangement. Spiro pseudoindoxyl compounds and their N-benzylated derivatives were assessed for their inhibitory activities against monoamine oxidase (MAO) enzymes. Based on half-maximal inhibitory concentration (IC50) values, 13 compounds were found to have higher inhibitory activity against MAO-B than against MAO-A. With regard to MAO-B inhibition, 11f showed the best inhibitory activity, with an IC50 value of 1.44 μM, followed by 11h (IC50 = 1.60 μM), 11j (IC50 = 2.78 μM), 11d (IC50 = 2.81 μM), and 11i (IC50 = 3.02 μM). Compound 11f was a competitive inhibitor with a Ki value of 0.51 ± 0.023 μM. In a reversibility experiment using dialysis, 11f showed effective recovery of MAO-B inhibition similar to that of safinamide. These experiments suggested that 11f was a potent, reversible, and competitive inhibitor of MAO-B activity.
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Affiliation(s)
- Karuppaiah Perumal
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur 613 401 Tamil Nadu India
| | - Jiseong Lee
- Department of Pharmacy, Research Institute of Life Pharmaceutical Sciences, Sunchon National University Suncheon 57922 Republic of Korea
| | - Sesuraj Babiola Annes
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur 613 401 Tamil Nadu India
| | - Subburethinam Ramesh
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur 613 401 Tamil Nadu India
| | - T M Rangarajan
- Department of Chemistry, Sri Venkateswara College, University of Delhi New Delhi India
| | - Bijo Mathew
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Sciences Campus Kochi 682 041 India
| | - Hoon Kim
- Department of Pharmacy, Research Institute of Life Pharmaceutical Sciences, Sunchon National University Suncheon 57922 Republic of Korea
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5
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Upreti GC, Singh T, Chaudhary D, Singh A. Cascade Cyclizations Triggered by Photochemically Generated Carbamoyl Radicals Derived from Alkyl Amines. J Org Chem 2023; 88:11801-11808. [PMID: 37555769 DOI: 10.1021/acs.joc.3c01090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
We report on a visible light-mediated cascade carbamoylation/cyclization of acrylamides using dihydropyridyl carbamoyl donors derived from alkyl amines. Diversely selected acrylamides including 2-cyano-N-arylacrylamides, indolyl- and benzimidazolyl acrylamides, and 2-alkynyl-N-aryl acrylamides participate in this reaction, providing products in good yields. The highlights of this photochemical method include the application of alkyl amine-derived carbamoyl donors, peroxide-free reaction conditions, and a broad scope.
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Affiliation(s)
| | - Tavinder Singh
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
| | - Divakar Chaudhary
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
| | - Anand Singh
- Department of Chemistry, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
- Department of Sustainable Energy Engineering, IIT Kanpur, Kanpur, 208016 Uttar Pradesh, India
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6
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Ogbu IM, Kurtay G, Robert F, Landais Y. Oxamic acids: useful precursors of carbamoyl radicals. Chem Commun (Camb) 2022; 58:7593-7607. [PMID: 35735051 DOI: 10.1039/d2cc01953a] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review article describes the recent development in the chemistry of carbamoyl radicals generated from oxamic acids. This mild and efficient method compares well with previous methods of generation of these nucleophilic radicals. The oxidative decarboxylation of oxamic acids can be mediated through thermal, photochemical, electrochemical or photoelectrochemical means, generating carbamoyl radicals, which may further add to unsaturated systems to provide a broad range of important amides. Oxidative decarboxylation of oxamic acids also offers a straightforward entry for the preparation of urethanes, ureas, and thioureas.
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Affiliation(s)
- Ikechukwu Martin Ogbu
- University of Bordeaux, Institute of Molecular Sciences (ISM), UMR-CNRS 5255, 351, Cours de la Libération, 33405 Talence, Cedex, France. .,Alex Ekwueme Federal University, Department of Chemistry, Faculty of Sciences, Ndufu-Alike Ikwo, Abakaliki, Ebonyi State, Nigeria
| | - Gülbin Kurtay
- University of Bordeaux, Institute of Molecular Sciences (ISM), UMR-CNRS 5255, 351, Cours de la Libération, 33405 Talence, Cedex, France. .,University of Ankara, Department of Chemistry, Faculty of Science, Ankara, Turkey
| | - Frédéric Robert
- University of Bordeaux, Institute of Molecular Sciences (ISM), UMR-CNRS 5255, 351, Cours de la Libération, 33405 Talence, Cedex, France.
| | - Yannick Landais
- University of Bordeaux, Institute of Molecular Sciences (ISM), UMR-CNRS 5255, 351, Cours de la Libération, 33405 Talence, Cedex, France.
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7
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Shen H, Du Y, Kan J, Su W. Synthesis of 3-substituted 2-oxindoles from secondary α-bromo-propionanilides via palladium-catalyzed intramolecular cyclization. Org Biomol Chem 2022; 20:3589-3597. [PMID: 35420109 DOI: 10.1039/d2ob00480a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In contrast to aromatic halides, coupling reactions involving oxidative addition of alkyl halides, especially secondary or tertiary halides, to transition metals tend to be more challenging. Herein a palladium-catalyzed intramolecular cyclization of α-bromo-propionanilides has been developed, delivering a series of 3-substituted 2-oxindoles in high yields. The method features easy to prepare starting materials, broad substrate scope and excellent functional group tolerance. A detailed mechanistic investigation has been performed.
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Affiliation(s)
- Hui Shen
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Yu Du
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Jian Kan
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Weiping Su
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
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8
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Radhoff N, Studer A. Oxindole synthesis via polar-radical crossover of ketene-derived amide enolates in a formal [3 + 2] cycloaddition. Chem Sci 2022; 13:3875-3879. [PMID: 35432887 PMCID: PMC8966637 DOI: 10.1039/d1sc07134c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/08/2022] [Indexed: 12/27/2022] Open
Abstract
Herein we introduce a simple, efficient and transition-metal free method for the preparation of valuable and sterically hindered 3,3-disubstituted oxindoles via polar-radical crossover of ketene derived amide enolates. Various easily accessible N-alkyl and N-arylanilines are added to disubstituted ketenes and the resulting amide enolates undergo upon single electron transfer oxidation a homolytic aromatic substitution (HAS) to provide 3,3-disubstituted oxindoles in good to excellent yields. A variety of substituted anilines and a 3-amino pyridine engage in this oxidative formal [3 + 2] cycloaddition and cyclic ketenes provide spirooxindoles. Both substrates and reagents are readily available and tolerance to functional groups is broad.
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Affiliation(s)
- Niklas Radhoff
- 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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9
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Gao B, Liu X, Zhang X, Yan Q, Yang R, Jiang T. DMSO-Mediated Difunctionalization of Electron-Deficient Olefins to Access β-Hydroxysulfides with High Chemoselectivity. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0041-1737341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AbstractA novel and convenient method for the highly chemoselective synthesis of β-hydroxysulfides mediated by DMSO is reported. This eco-friendly reaction was amenable to a broad range of substrates and provided the desired β-hydroxysulfides in moderate to good yields with high selectivity via radical process. Moreover, several pharmaceutical and bioactive molecules were also suitable substrates for this reaction conditions to afford the targeted products in good yields.
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Affiliation(s)
- Bao Gao
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
| | - Xiaojun Liu
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
| | - Xiuli Zhang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry
| | - Qian Yan
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
| | - Ruiting Yang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
| | - Tao Jiang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University
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10
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McKenzie LK, Flamme M, Felder PS, Karges J, Bonhomme F, Gandioso A, Malosse C, Gasser G, Hollenstein M. A ruthenium-oligonucleotide bioconjugated photosensitizing aptamer for cancer cell specific photodynamic therapy. RSC Chem Biol 2022; 3:85-95. [PMID: 35128412 PMCID: PMC8729177 DOI: 10.1039/d1cb00146a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 10/31/2021] [Indexed: 12/15/2022] Open
Abstract
Ruthenium complexes have emerged as a promising class of compounds for use as photosensitizers (PSs) in photodynamic therapy (PDT) due to their attractive photophysical properties and relative ease of chemical alteration. While promising, they generally are not inherently targeting to disease sites and may therefore be prone to side effects and require higher doses. Aptamers are short oligonucleotides that bind specific targets with high affinity. One such aptamer is AS1411, a nucleolin targeting, G-quadruplex forming, DNA aptamer. Here we present the first example of direct conjugation of a Ru(ii) polypyridyl complex-based PS to an aptamer and an assessment of its in vitro cancer cell specific photosensitization including discussion of the challenges faced.
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Affiliation(s)
- Luke K McKenzie
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR3523 28 rue du Docteur Roux 75724 Paris Cedex 15 France https://research.pasteur.fr/en/team/bioorganic-chemistry-of-nucleic-acids/ +33 1 44 38 94 66
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
| | - Marie Flamme
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR3523 28 rue du Docteur Roux 75724 Paris Cedex 15 France https://research.pasteur.fr/en/team/bioorganic-chemistry-of-nucleic-acids/ +33 1 44 38 94 66
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
- Université de Paris 12 rue de l'École de Médecine 75006 Paris France
| | - Patrick S Felder
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
| | - Johannes Karges
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
| | - Frederic Bonhomme
- Institut Pasteur, Department of Structural Biology and Chemistry, Unité de Chimie Biologique Epigénétique, UMR CNRS 3523 28 rue du Docteur Roux 75724 Paris Cedex 15 France
| | - Albert Gandioso
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
| | - Christian Malosse
- Institut Pasteur, Mass Spectrometry for Biology Unit 28 rue du Docteur Roux 75724 Paris Cedex 15 France
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology 75005 Paris France www.gassergroup.com +33 1 85 78 41 51
| | - Marcel Hollenstein
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR3523 28 rue du Docteur Roux 75724 Paris Cedex 15 France https://research.pasteur.fr/en/team/bioorganic-chemistry-of-nucleic-acids/ +33 1 44 38 94 66
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11
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Gao Q, Jing Q, Chen Y, Sun J, Zhou M. Decarboxylative Amidation of Acrylamides with Oxamic Acids. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202105025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Cheng H, Luo Y, Lam TL, Liu Y, Che CM. Visible-light-induced radical cascade reaction to prepare oxindoles via alkyl radical addition to N-arylacryl amides. Org Chem Front 2022. [DOI: 10.1039/d2qo01140a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photochemical approach towards oxindoles with C3 quaternary centers by the radical cascade reaction of α,β-unsaturated N-arylacryl amides with alkyl bromides or iodides upon visible light irradiation under mild reaction conditions was developed.
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Affiliation(s)
- Hanchao Cheng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
| | - Yunfeng Luo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
| | - Tsz-Lung Lam
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Yungen Liu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
| | - Chi-Ming Che
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
- HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong 518057, P. R. China
- Laboratory for Synthetic Chemistry and Chemical Biology Limited, Units 1503-1511, 15/F., Building 17W, Hong Kong Science Park, New Territories, Hong Kong, China
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13
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Pounder A, Tam W. Iron-catalyzed domino coupling reactions of π-systems. Beilstein J Org Chem 2021; 17:2848-2893. [PMID: 34956407 PMCID: PMC8685557 DOI: 10.3762/bjoc.17.196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/24/2021] [Indexed: 12/26/2022] Open
Abstract
The development of environmentally benign, inexpensive, and earth-abundant metal catalysts is desirable from both an ecological and economic standpoint. Certainly, in the past couple decades, iron has become a key player in the development of sustainable coupling chemistry and has become an indispensable tool in organic synthesis. Over the last ten years, organic chemistry has witnessed substantial improvements in efficient synthesis because of domino reactions. These protocols are more atom-economic, produce less waste, and demand less time compared to a classical stepwise reaction. Although iron-catalyzed domino reactions require a mindset that differs from the more routine noble-metal, homogenous iron catalysis they bear the chance to enable coupling reactions that rival that of noble-metal-catalysis. This review provides an overview of iron-catalyzed domino coupling reactions of π-systems. The classifications and reactivity paradigms examined should assist readers and provide guidance for the design of novel domino reactions.
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Affiliation(s)
- Austin Pounder
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - William Tam
- Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, Department of Chemistry, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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14
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Cheng C, Xiang JN, Zhu YP, Peng ZH, Li JH. Nickel-Catalyzed Arylcarbamoylation of Alkenes of N-( o-Iodoaryl)acrylamides with Nitroarenes via Reductive Aminocarbonylation: Facile Synthesis of Carbamoyl-Substituted Oxindoles. Org Lett 2021; 23:9543-9547. [PMID: 34860537 DOI: 10.1021/acs.orglett.1c03762] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nickel-catalyzed arylcarbamoylation reactions of alkenes of N-(o-haloaryl)acrylamides with CO and nitroarenes via reductive aminocarbonylation to produce carbamoyl-substituted oxindoles with an all-carbon quaternary stereogenic center are presented. Starting with N-(o-haloaryl)acrylamides, simple CO, and inexpensive nitroarenes and using a Ni catalyst, a dinitrogen-based ligand, a Zn reductant, a TMSCl additive, and a base system, this protocol enables the synthesis of various carbamoyl-substituted oxindoles and allows the efficient late-stage derivatization of valuable molecules.
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Affiliation(s)
- Chaozhihui Cheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jian-Nan Xiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong 264005, China
| | - Zhi-Hong Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jin-Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.,School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, Shandong 264005, China.,Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 475004, China
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15
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Sacchelli BAL, Rocha BC, Andrade LH. Cascade Reactions Assisted by Microwave Irradiation: Ultrafast Construction of 2-Quinolinone-Fused γ-Lactones from N-( o-Ethynylaryl)acrylamides and Formamide. Org Lett 2021; 23:5071-5075. [PMID: 34152153 DOI: 10.1021/acs.orglett.1c01606] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An ultrafast (10 s) methodology to construct novel highly functionalized 2-quinolinones from N-(o-ethynylaryl)acrylamides (1,7-enynes) is described for the first time. Microwave irradiation enabled the ultrafast synthesis of 2-quinolinone-fused γ-lactones from Fenton's reagents in formamide. After six key consecutive reactions, including a diastereoselective step, 2-quinolinone-fused γ-lactones were obtained in good overall yield (up to 46%; 10 s).
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Affiliation(s)
| | - Bianca C Rocha
- Instituto de Química, Universidade de São Paulo, São Paulo, Brasil
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16
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Nascimento VR, Suenaga MLS, Andrade LH. An efficient approach for the synthesis of new (±)-coixspirolactams. Org Biomol Chem 2020; 18:5458-5465. [PMID: 32639487 DOI: 10.1039/d0ob01104e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coixspirolactams, spiro[oxindole-γ-lactones], are found in adlay seeds and exhibit anticancer activity. A novel synthetic methodology was developed to enable an easy access to (±)-coixspirolactam A and a large number of new coixspirolactams in excellent overall yields. The exquisite exploitation of formamide reactivity was essential for the construction of oxindole and lactone scaffolds.
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17
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Sanabria MN, Hornink MM, Correia VG, Andrade LH. Nontraditional Application of the Photo-Fenton Process: A Novel Strategy for Molecular Construction Using Formamide and Flow Chemistry. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marialy N. Sanabria
- Institute of Chemistry, University of São Paulo, 748 Lineu Prestes Av., 05300-080 São Paulo-SP, Brazil
| | - Milene M. Hornink
- Institute of Chemistry, University of São Paulo, 748 Lineu Prestes Av., 05300-080 São Paulo-SP, Brazil
| | - Valquíria G. Correia
- Institute of Chemistry, University of São Paulo, 748 Lineu Prestes Av., 05300-080 São Paulo-SP, Brazil
| | - Leandro H. Andrade
- Institute of Chemistry, University of São Paulo, 748 Lineu Prestes Av., 05300-080 São Paulo-SP, Brazil
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18
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Rhodium-catalyzed synthesis of C4-chalcogenoalkylated oxindoles via Sommelet-Hauser type rearrangement of 3-diazoindolin-2-ones. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1711-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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19
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Zhu M, You Q, Li R. Synthesis of CF2H-containing oxindoles via photoredox-catalyzed radical difluoromethylation and cyclization of N-arylacrylamides. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.109391] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Manoharan R, Logeswaran R, Jeganmohan M. Ru(II)- or Rh(III)-Catalyzed Difunctionalization of Alkenes by Tandem Cyclization of N-Aryl Acrylamides with Alkenes. J Org Chem 2019; 84:14830-14843. [DOI: 10.1021/acs.joc.9b02527] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ramasamy Manoharan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Ravichandran Logeswaran
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Masilamani Jeganmohan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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21
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Liu D, Hu Z, Zhang Y, Gong M, Fu Z, Huang W. Access to Enantioenriched Spiro-ϵ-Lactam Oxindoles by an N-Heterocyclic Carbene-Catalyzed [4+3] Annulation of Flexible Oxotryptamines with Enals. Chemistry 2019; 25:11223-11227. [PMID: 31298766 DOI: 10.1002/chem.201903144] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Indexed: 01/06/2023]
Abstract
Oxotryptamines were firstly used as flexible four-atom synthons in an NHC-catalyzed formal [4+3] annulation, providing a novel enantioselective method to access structurally diverse spiro-ϵ-lactam oxindoles with excellent enantioselectivities. This metal-free reaction features a broad substrate scope, excellent functional-group tolerance and proceeds under mild reaction conditions. Importantly, enantiopure privileged hexahydropyrroloindoles could be easily constructed by a one-pot process from the resulting spiro-ϵ-lactam oxindoles.
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Affiliation(s)
- Dehai Liu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Zhouli Hu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yuxia Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Minghua Gong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.,Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.,Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
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22
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Budai B, Leclair A, Wang Q, Zhu J. Copper-Catalyzed 1,2-Methoxy Methoxycarbonylation of Alkenes with Methyl Formate. Angew Chem Int Ed Engl 2019; 58:10305-10309. [PMID: 31106517 DOI: 10.1002/anie.201904263] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 05/06/2019] [Indexed: 01/05/2023]
Abstract
Reported here is a copper-catalyzed 1,2-methoxy methoxycarbonylation of alkenes by an unprecedented use of methyl formate as a source of both the methoxy and the methoxycarbonyl groups. This reaction transforms styrene and its derivatives into value-added β-methoxy alkanoates and cinnamates, as well as medicinally important five-membered heterocycles, such as functionalized tetrahydrofurans, γ-lactones, and pyrrolidines. A ternary β-diketiminato-CuI -styrene complex, fully characterized by NMR spectroscopy and X-ray crystallographic analysis, is capable of catalyzing the same transformation. These findings suggest that pre-coordination of electron-rich alkenes to copper might play an important role in accelerating the addition of nucleophilic radicals to electron-rich alkenes, and could have general implications in the design of novel radical-based transformations.
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Affiliation(s)
- Balázs Budai
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Alexandre Leclair
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
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23
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Budai B, Leclair A, Wang Q, Zhu J. Copper‐Catalyzed 1,2‐Methoxy Methoxycarbonylation of Alkenes with Methyl Formate. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904263] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Balázs Budai
- Laboratory of Synthesis and Natural ProductsInstitute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Alexandre Leclair
- Laboratory of Synthesis and Natural ProductsInstitute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural ProductsInstitute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural ProductsInstitute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
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24
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Liu Q, Li C, Lu Z, Huang G, Ye J, Gao Y, Chen H. A Direct Approach to 3‐Azo‐Substituted 2‐Oxindoles at Room Temperature by Nickel‐Catalyzed Oxidative Coupling Reaction. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qing Liu
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Cailong Li
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Zhenxin Lu
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Gaofeng Huang
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Jinxiang Ye
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Yu Gao
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
| | - Haijun Chen
- College of ChemistryFuzhou University Fuzhou Fujian 350116 China
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25
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Yuan J, Zhu J, Fu J, Yang L, Xiao Y, Mao P, Du X, Qu L. Highly efficient copper-catalyzed direct C–H amidation of quinoxalin-2(1H)-ones with amidates under microwave irradiation. Org Chem Front 2019. [DOI: 10.1039/c9qo00063a] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel and convenient protocol for the construction of 3-amidated quinoxalin-2(1H)-ones was developed via copper-catalyzed direct oxidative amidation of quinoxalin-2(1H)-ones with amidates using K2S2O8 as an oxidant, and under microwave irradiation.
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Affiliation(s)
- Jinwei Yuan
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Junliang Zhu
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Junhao Fu
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Liangru Yang
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Yongmei Xiao
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Pu Mao
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Xue Du
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Lingbo Qu
- School of Chemistry & Chemical Engineering
- Henan University of Technology
- Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
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26
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Jatoi AH, Pawar GG, Robert F, Landais Y. Visible-light mediated carbamoyl radical addition to heteroarenes. Chem Commun (Camb) 2019; 55:466-469. [DOI: 10.1039/c8cc08326f] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Decarboxylative carbamoylation of heteroarenes using oxamic acids under visible-light irradiation is described.
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Affiliation(s)
- Ashique Hussain Jatoi
- University of Bordeaux
- Institute of Molecular Sciences (ISM)
- UMR-CNRS 5255
- 33405 Talence Cedex
- France
| | - Govind Goroba Pawar
- University of Bordeaux
- Institute of Molecular Sciences (ISM)
- UMR-CNRS 5255
- 33405 Talence Cedex
- France
| | - Frédéric Robert
- University of Bordeaux
- Institute of Molecular Sciences (ISM)
- UMR-CNRS 5255
- 33405 Talence Cedex
- France
| | - Yannick Landais
- University of Bordeaux
- Institute of Molecular Sciences (ISM)
- UMR-CNRS 5255
- 33405 Talence Cedex
- France
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27
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Shen X, Zhao J, Xi Y, Chen W, Zhou Y, Yang X, Zhang H. Enantioselective Total Synthesis of (+)-Nocardioazine B. J Org Chem 2018; 83:14507-14517. [DOI: 10.1021/acs.joc.8b02329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xianfu Shen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing, Yunnan 655011, P.R. China
| | - Jingfeng Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Yongkai Xi
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Wen Chen
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Yongyun Zhou
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, Yunnan 650091, P.R. China
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28
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Singh R, Nagesh K, Yugandhar D, Prasanthi AVG. Metal- and Oxidant-Free Modular Approach To Access N-Alkoxy Oxindoles via Aryne Annulation. Org Lett 2018; 20:4848-4853. [PMID: 30044101 DOI: 10.1021/acs.orglett.8b01972] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An unprecedented metal- and oxidant-free (intermolecular) approach to access N-alkoxy oxindoles via [3 + 2] cycloadition of in situ generated electrophilic species viz. aryne and (putative) aza-oxyallyl cation is reported. This approach is amenable to both C3-unsubstituted as well as C3-substituted oxindoles. A one-pot manipulation further makes this reaction highly practical. The versatility of this approach was demonstrated through valuable synthetic transformations.
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Affiliation(s)
- Ritesh Singh
- Department of Medicinal Chemistry , National Institute of Pharmaceutical Education and Research (NIPER) , Raebareli - 229010 , UP , India.,Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , Telangana , India
| | - Kommu Nagesh
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , Telangana , India
| | - Doddapaneni Yugandhar
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , Telangana , India
| | - A V G Prasanthi
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad - 500007 , Telangana , India
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29
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Pilli RA, Assis FFDE. Organic Synthesis: New Vistas in the Brazilian Landscape. AN ACAD BRAS CIENC 2018; 90:895-941. [PMID: 29742201 DOI: 10.1590/0001-3765201820170564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 11/29/2017] [Indexed: 12/20/2022] Open
Abstract
In this overview, we present our analysis of the future of organic synthesis in Brazil, a highly innovative and strategic area of research which underpins our social and economical progress. Several different topics (automation, catalysis, green chemistry, scalability, methodological studies and total syntheses) were considered to hold promise for the future advance of chemical sciences in Brazil. In order to put it in perspective, contributions from Brazilian laboratories were selected by the citations received and importance for the field and were benchmarked against some of the most important results disclosed by authors worldwide. The picture that emerged reveals a thriving area of research, with new generations of well-trained and productive chemists engaged particularly in the areas of green chemistry and catalysis. In order to fulfill the promise of delivering more efficient and sustainable processes, an integration of the academic and industrial research agendas is to be expected. On the other hand, academic research in automation of chemical processes, a well established topic of investigation in industrial settings, has just recently began in Brazil and more academic laboratories are lining up to contribute. All these areas of research are expected to enable the future development of the almost unchartered field of scalability.
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30
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He ZY, Guo JY, Tian SK. Copper-Catalyzed Oxidative Carbamoylation of N
-Arylacrylamides with Hydrazinecarboxamides Leading to 2-(Oxindol-3-yl)acetamides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zeng-Yang He
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry; University of Science and Technology of China; Hefei, Anhui 230026 People's Republic of China
| | - Jing-Yu Guo
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry; University of Science and Technology of China; Hefei, Anhui 230026 People's Republic of China
| | - Shi-Kai Tian
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry; University of Science and Technology of China; Hefei, Anhui 230026 People's Republic of China
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31
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Cui Z, Du DM. Decarboxylative Synthesis of Functionalized Oxindoles via An Iron-Initiated Radical Chain Process and Application in Constructing Diverse Fused-Indoline Heterocycles. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700976] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhihao Cui
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 People's Republic of China
| | - Da-Ming Du
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 People's Republic of China
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32
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Donald JR, Taylor RJK, Petersen WF. Low-Temperature, Transition-Metal-Free Cross-Dehydrogenative Coupling Protocol for the Synthesis of 3,3-Disubstituted Oxindoles. J Org Chem 2017; 82:11288-11294. [PMID: 28926705 DOI: 10.1021/acs.joc.7b02085] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new low-temperature procedure for the synthesis of 3,3-disubstituted 2-oxindoles via cross-dehydrogenative coupling (CDC) is reported. The use of a strong, nonreversible base in these reactions has been found to effect a dramatic drop in reaction temperature (to room temperature) relative to the current state-of-the-art (>100 °C) procedure. When employing iodine as an "oxidant", new evidence suggests that this transformation may occur via a transiently stable iodinated intermediate rather than by direct single-electron oxidation.
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Affiliation(s)
- James R Donald
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Richard J K Taylor
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
| | - Wade F Petersen
- Department of Chemistry, University of York , Heslington, York YO10 5DD, U.K
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33
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Affiliation(s)
- Eike B. Bauer
- University of Missouri - St. Louis; Department of Chemistry and Biochemistry; One University Boulevard St. Louis, MO 63121 USA
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34
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Yuan YQ, Kumar PS, Zhang CN, Yang MH, Guo SR. Aerobic thiyl radical addition/cyclization of N-methacryloyl benzamides for the synthesis of isoquinoline-1,3(2H,4H)-dione derivatives. Org Biomol Chem 2017; 15:7330-7338. [DOI: 10.1039/c7ob01552f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly effective dioxygen-triggered oxidative thiyl radical addition/cyclization of N-methacryloylbenzamides was explored. This method provides convenient access to a variety of useful sulfide-containing 4,4-disubstituted isoquinoline-1,3-diones.
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Affiliation(s)
- Yan-qin Yuan
- Department of Chemistry
- Lishui University
- Lishui
- China
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