1
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Ma Y. Ambimodal Addition-Coupled Electron Transfer Mechanism in a Pb(IV)-Promoted Oxidative Dearomatization Reaction. J Org Chem 2024; 89:224-232. [PMID: 38100374 DOI: 10.1021/acs.joc.3c01956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
The mechanism of the Pb(IV)-promoted phenol oxidative dearomatization reaction has been traditionally attributed to a carbocation mechanism. In 2011, Pettus reported an oxidative dearomatization reaction leading to a mixture of a formal [5 + 2] and a C-O bond formation product. By employing density functional theory and quasi-molecular dynamics calculations, it was demonstrated that the reaction does not occur through a carbocation intermediate but instead proceeds through an addition-coupled electron transfer (ACET) mechanism. Moreover, the ACET exhibits ambimodality, wherein a transition state results in 4-6 distinct outcomes through post-TS bifurcation. The reported selectivity can be effectively rationalized by a newly proposed mechanism.
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Affiliation(s)
- Yumiao Ma
- BSJ Institute, Haidian, Beijing 100084, People's Republic of China
- Hangzhou Yanqu Information Technology Co., Ltd., Xihu District, Hangzhou, Zhejiang 310003, People's Republic of China
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2
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Stünkel T, Siebold K, Okumatsu D, Murata K, Ruyet L, Daniliuc CG, Gilmour R. para-Selective dearomatization of phenols by I(i)/I(iii) catalysis-based fluorination. Chem Sci 2023; 14:13574-13580. [PMID: 38033893 PMCID: PMC10685341 DOI: 10.1039/d3sc05952a] [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: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 12/02/2023] Open
Abstract
The regio- and enantio-selective dearomatization of phenols has been achieved by I(i)/I(iii) catalysis enabled fluorination. The process is highly para-selective, guiding the fluoride nucleophile to the distal C4 position of the substrate to generate fluorinated cyclohexadienones in an operationally simple manner. Extensive optimization has revealed key parameters that orchestrate enantioselectivity in this historically challenging transformation. A range of diversely substituted substrates are disclosed (20 examples, up to 92 : 8 e.r.) and the reaction displays efficiency that is competitive with the current state of the art in hydroxylation chemistry: this provides a preparative platform to enable OH to F bioisosterism to be explored. Finally, the utility of the products in accessing densely functionalized cyclic scaffolds with five contiguous stereocenters is disclosed together with crystallographic analyses to unveil fluorine-carbonyl non-covalent interactions.
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Affiliation(s)
- Timo Stünkel
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Kathrin Siebold
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Daichi Okumatsu
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Kazuki Murata
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Louise Ruyet
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Universität Münster Corrensstraße 36 48149 Münster Germany
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3
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Zhou W, Gan J, Li H, Wang C. ZnCl 2-Promoted Three-Component Reaction of 2-Aminochromenones, Aromatic Aldehydes, and Quinone Monoketals: Access to 5,6-Dihydro-12 H-chromeno[2,3- c]isoquinolin-12-one Derivatives. J Org Chem 2023; 88:14767-14774. [PMID: 37820027 DOI: 10.1021/acs.joc.3c01405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
A three-component reaction of 2-amino-4H-chromen-4-ones, aromatic aldehydes, and 4,4-dialkoxycyclohexa-2,5-dien-1-ones for the concise synthesis of chromeno[2,3-c]dihydroisoquinoline derivatives has been investigated. This reaction involved consecutive ZnCl2-promoted Micheal addition and intramolecular Friedel-Crafts alkylation. This synthetic protocol offered several advantages, including the readily accessible starting materials, good functional group tolerance, and simplicity of operation. Additionally, the structures of products obtained were determined based on X-ray diffraction studies.
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Affiliation(s)
- Wenyan Zhou
- School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Street, Yangzhou 225002, P. R. China
| | - Jianbo Gan
- School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Street, Yangzhou 225002, P. R. China
| | - Haiwen Li
- School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Street, Yangzhou 225002, P. R. China
| | - Cunde Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Street, Yangzhou 225002, P. R. China
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4
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Zheng H, Cai L, Pan M, Uyanik M, Ishihara K, Xue XS. Catalyst-Substrate Helical Character Matching Determines the Enantioselectivity in the Ishihara-Type Iodoarenes Catalyzed Asymmetric Kita-Dearomative Spirolactonization. J Am Chem Soc 2023; 145:7301-7312. [PMID: 36940192 DOI: 10.1021/jacs.2c13295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Catalyst design has traditionally focused on rigid structural elements to prevent conformational flexibility. Ishihara's elegant design of conformationally flexible C2-symmetric iodoarenes, a new class of privileged organocatalysts, for the catalytic asymmetric dearomatization (CADA) of naphthols is a notable exception. Despite the widespread use of the Ishihara catalysts for CADAs, the reaction mechanism remains the subject of debate, and the mode of asymmetric induction has not been well established. Here, we report an in-depth computational investigation of three possible mechanisms in the literature. Our results, however, reveal that this reaction is best rationalized by a fourth mechanism called "proton-transfer-coupled-dearomatization (PTCD)", which is predicted to be strongly favored over other competing pathways. The PTCD mechanism is consistent with a control experiment and further validated by applying it to rationalize the enantioselectivities. Oxidation of the flexible I(I) catalyst to catalytic active I(III) species induces a defined C2-symmetric helical chiral environment with a delicate balance between flexibility and rigidity. A match/mismatch effect between the active catalyst and the substrate's helical shape in the dearomatization transition states was observed. The helical shape match allows the active catalyst to adapt its conformation to maximize attractive noncovalent interactions, including I(III)···O halogen bond, N-H···O hydrogen bond, and π···π stacking, to stabilize the favored transition state. A stereochemical model capable of rationalizing the effect of catalyst structural variation on the enantioselectivities is developed. The present study enriches our understanding of how flexible catalysts achieve high stereoinduction and may serve as an inspiration for the future exploration of conformational flexibility for new catalyst designs.
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Affiliation(s)
- Hanliang Zheng
- Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Liu Cai
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ming Pan
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Muhammet Uyanik
- Graduate School of Engineering, Nagoya University Furocho, Chikusaku, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University Furocho, Chikusaku, Nagoya 464-8603, Japan
| | - Xiao-Song Xue
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, P. R. China
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5
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Koszelewski D, Kowalczyk P, Samsonowicz-Górski J, Hrunyk A, Brodzka A, Łęcka J, Kramkowski K, Ostaszewski R. Synthesis and Antimicrobial Activity of the Pathogenic E. coli Strains of p-Quinols: Additive Effects of Copper-Catalyzed Addition of Aryl Boronic Acid to Benzoquinones. Int J Mol Sci 2023; 24:ijms24021623. [PMID: 36675139 PMCID: PMC9862949 DOI: 10.3390/ijms24021623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 12/30/2022] [Accepted: 01/10/2023] [Indexed: 01/19/2023] Open
Abstract
A mild and efficient protocol for the synthesis of p-quinols under aqueous conditions was developed. The pivotal role of additives in the copper-catalyzed addition of aryl boronic and heteroaryl boronic acids to benzoquinones was observed. It was found that polyvinylpyrrolidone (PVP) was the most efficient additive used for the studied reaction. The noteworthy advantages of this procedure include its broad substrate scope, high yields up to 91%, atom economy, and usage of readily available starting materials. Another benefit of this method is the reusability of the catalytic system up to four times. Further, the obtained p-quinols were characterized on the basis of their antimicrobial activities against E. coli. Antimicrobial activity was further compared with the corresponding 4-benzoquinones and 4-hydroquinones. Among tested compounds, seven derivatives showed an antimicrobial activity profile similar to that observed for commonly used antibiotics such as ciprofloxacin, bleomycin, and cloxacillin. In addition, the obtained p-quinols constitute a suitable platform for further modifications, allowing for a convenient change in their biological activity profile.
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Affiliation(s)
- Dominik Koszelewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Correspondence: (D.K.); (P.K.); Tel.: +48-223432012 (D.K.); +48-227653301 (P.K.)
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110 Jabłonna, Poland
- Correspondence: (D.K.); (P.K.); Tel.: +48-223432012 (D.K.); +48-227653301 (P.K.)
| | - Jan Samsonowicz-Górski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Anastasiia Hrunyk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Anna Brodzka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Justyna Łęcka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Bialystok, Kilińskiego 1 Str., 15-089 Białystok, Poland
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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6
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Juneau A, Lepage I, Sabbah SG, Winter AH, Frenette M. Mechanistic Insight into Phenol Dearomatization by Hypervalent Iodine: Direct Detection of a Phenoxenium Cation. J Org Chem 2022; 87:14274-14283. [PMID: 36215691 DOI: 10.1021/acs.joc.2c01765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Phenol dearomatization is one of several oxidation reactions enabled by hypervalent iodine reagents. However, the presence of a proposed free phenoxenium intermediate in phenol dearomatization is a matter of debate in the literature. Here, we report the unambiguous detection of a free phenoxenium intermediate in the reaction of an electron-rich phenol, 2,4,6-trimethoxyphenol, and (diacetoxyiodo)benzene using UV-vis and resonance Raman spectroscopies. In contrast, we predominantly detect single electron oxidation products of less electron-rich phenols or alkoxy-substituted aromatics in their reaction with (diacetoxyiodo)benzene using UV-vis and electron paramagnetic resonance (EPR) spectroscopies. We conclude that the often-postulated free phenoxenium intermediate, while possible with highly stabilizing substituents, is unlikely to be a general mechanistic pathway in the reaction of typical phenols with hypervalent iodine reagents. The polar solvent 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) or the use of more strongly oxidizing hypervalent iodine reagents, such as [bis(trifluoroacetoxy)iodo]benzene (PIFA) or [hydroxy(tosyloxy)iodo]benzene (HTIB), can help reduce the formation of radical byproducts and favors the formation of phenoxenium intermediates.
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Affiliation(s)
- Antoine Juneau
- Department of Chemistry, Quebec Centre for Advanced Materials and NanoQAM, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Iannick Lepage
- Department of Chemistry, Quebec Centre for Advanced Materials and NanoQAM, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Sami G Sabbah
- Department of Chemistry, Quebec Centre for Advanced Materials and NanoQAM, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
| | - Arthur H Winter
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, Iowa 50010, United States
| | - Mathieu Frenette
- Department of Chemistry, Quebec Centre for Advanced Materials and NanoQAM, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-Ville, Montréal, Québec H3C 3P8, Canada
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7
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Sihag M, Soni R, Rani N, Kinger M, Kumar Aneja D. Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment III. ORG PREP PROCED INT 2022. [DOI: 10.1080/00304948.2022.2114239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Affiliation(s)
- Monika Sihag
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Rinku Soni
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Neha Rani
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Mayank Kinger
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Deepak Kumar Aneja
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
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8
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Yadav G, Kumar S, Kumar D, Kataria R, Laroche C, Kerwin SM. Phenyliodine(III) diacetate-mediated dearomatization of 2-(2-hydroxyaryl)benzoxazoles and 2-(2-hydroxyaryl)benzothiazoles: Regio- and stereoselective synthesis of tetramethoxycyclohexenones and bicyclo[2.2.2]octenones. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Saleh SKA, Hazra A, Hajra S. Regioselective Hydroperoxylation of Aziridines and Epoxides Only with Aqueous Hydrogen Peroxide. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202100858] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- SK Abu Saleh
- Centre of Biomedical Research Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus Raebareli Road Lucknow 226014 India
| | - Atanu Hazra
- Centre of Biomedical Research Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus Raebareli Road Lucknow 226014 India
| | - Saumen Hajra
- Centre of Biomedical Research Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus Raebareli Road Lucknow 226014 India
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10
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Kumar R, Singh FV, Takenaga N, Dohi T. Asymmetric Direct/Stepwise Dearomatization Reactions Involving Hypervalent Iodine Reagents. Chem Asian J 2021; 17:e202101115. [PMID: 34817125 DOI: 10.1002/asia.202101115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/19/2021] [Indexed: 01/06/2023]
Abstract
A remarkable growth in hypervalent iodine-mediated oxidative transformations as stoichiometric reagents as well as catalysts has been well-documented due to their excellent properties, such as mildness, easy handling, high selectivity, environmentally friendly nature, and high stability. This review aims at highlighting the asymmetric oxidative dearomatization reactions involving hypervalent iodine compounds. The present article summarizes asymmetric intra- and intermolecular dearomatization reactions using chiral hypervalent iodine reagents/catalysts as well as hypervalent iodine-mediated dearomatization reactions followed by desymmetrization.
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Affiliation(s)
- Ravi Kumar
- Department of Chemistry, J. C. Bose University of Science & Technology, YMCA Faridabad, NH-2, Sector-6, Mathura Road, Faridabad, Haryana, 121006, India
| | - Fateh V Singh
- Chemistry Division, School of Advanced Sciences (SAS), Vellore Institute of Technology - Chennai, Chennai, 600127, Tamil Nadu, India
| | - Naoko Takenaga
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Toshifumi Dohi
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-0058, Japan
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11
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Zheng H, Xue XS. Recent Computational Studies on Mechanisms of Hypervalent Iodine(III)-Promoted Dearomatization of Phenols. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200620223218] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hypervalent iodine-promoted dearomatization of phenols has received intense
attention. This mini-review summarizes recent computational mechanistic studies of phenolic
dearomatizations promoted by hypervalent iodine(III) reagents or catalysts. The first part
of this review describes mechanisms of racemic dearomatization of phenols, paying special
attention to the associative and dissociative pathways. The second part focuses on mechanisms
and selectivities of diastereo- or enantio-selective dearomatization of phenols.
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Affiliation(s)
- Hanliang Zheng
- College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiao-Song Xue
- College of Chemistry, Nankai University, Tianjin 300071, China
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12
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Kraszewski K, Tomczyk I, Drabinska A, Bienkowski K, Solarska R, Kalek M. Mechanism of Iodine(III)-Promoted Oxidative Dearomatizing Hydroxylation of Phenols: Evidence for a Radical-Chain Pathway. Chemistry 2020; 26:11584-11592. [PMID: 32608529 DOI: 10.1002/chem.202002026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/26/2020] [Indexed: 11/09/2022]
Abstract
The oxidative dearomatization of phenols with the addition of nucleophiles to the aromatic ring induced by hypervalent iodine(III) reagents and catalysts has emerged as a highly useful synthetic approach. However, experimental mechanistic studies of this important process have been extremely scarce. In this report, we describe systematic investigations of the dearomatizing hydroxylation of phenols using an array of experimental techniques. Kinetics, EPR spectroscopy, and reactions with radical probes demonstrate that the transformation proceeds by a radical-chain mechanism, with a phenoxyl radical being the key chain-carrying intermediate. Moreover, UV and NMR spectroscopy, high-resolution mass spectrometry, and cyclic voltammetry show that before reacting with the phenoxyl radical, the water molecule becomes activated by the interaction with the iodine(III) center, causing the Umpolung of this formally nucleophilic substrate. The radical-chain mechanism allows the rationalization of all existing observations regarding the iodine(III)-promoted oxidative dearomatization of phenols.
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Affiliation(s)
- Karol Kraszewski
- Centre of New Technologies, University of Warsaw, S. Banacha 2C, 02-097, Warsaw, Poland.,Faculty of Chemistry, University of Warsaw, L. Pasteura 1, 02-093, Warsaw, Poland
| | - Ireneusz Tomczyk
- Centre of New Technologies, University of Warsaw, S. Banacha 2C, 02-097, Warsaw, Poland.,Faculty of Chemistry, University of Warsaw, L. Pasteura 1, 02-093, Warsaw, Poland
| | - Aneta Drabinska
- Faculty of Physics, University of Warsaw, L. Pasteura 5, 02-093, Warsaw, Poland
| | - Krzysztof Bienkowski
- Centre of New Technologies, University of Warsaw, S. Banacha 2C, 02-097, Warsaw, Poland
| | - Renata Solarska
- Centre of New Technologies, University of Warsaw, S. Banacha 2C, 02-097, Warsaw, Poland
| | - Marcin Kalek
- Centre of New Technologies, University of Warsaw, S. Banacha 2C, 02-097, Warsaw, Poland
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13
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Kaur A, Ariafard A. Mechanistic investigation into phenol oxidation by IBX elucidated by DFT calculations. Org Biomol Chem 2020; 18:1117-1129. [DOI: 10.1039/c9ob02650a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Density functional theory (DFT) at the SMD/M06-2X/def2-TZVP//SMD/M06-2X/LANL2DZ(d),6-31G(d) level was used to explore the regioselective double oxidation of phenols by a hypervalent iodine(v) reagent (IBX) to give o-quinones.
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Affiliation(s)
- Amritpal Kaur
- School of Natural Sciences (Chemistry)
- University of Tasmania
- Hobart
- Australia
| | - Alireza Ariafard
- School of Natural Sciences (Chemistry)
- University of Tasmania
- Hobart
- Australia
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14
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Zheng H, Sang Y, Houk KN, Xue XS, Cheng JP. Mechanism and Origins of Enantioselectivities in Spirobiindane-Based Hypervalent Iodine(III)-Induced Asymmetric Dearomatizing Spirolactonizations. J Am Chem Soc 2019; 141:16046-16056. [DOI: 10.1021/jacs.9b08243] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hanliang Zheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Yueqian Sang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Xiao-Song Xue
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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15
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Hyatt IFD, Dave L, David N, Kaur K, Medard M, Mowdawalla C. Hypervalent iodine reactions utilized in carbon–carbon bond formations. Org Biomol Chem 2019; 17:7822-7848. [DOI: 10.1039/c9ob01267b] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
This review covers recent developments of hypervalent iodine chemistry in dearomatizations, radicals, hypervalent iodine-guided electrophilic substitution, arylations, photoredox, and more.
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Affiliation(s)
| | - Loma Dave
- Department of Chemistry and Biochemistry
- Adelphi University
- Garden City
- USA
| | - Navindra David
- Department of Chemistry and Biochemistry
- Adelphi University
- Garden City
- USA
| | - Kirandeep Kaur
- Department of Chemistry and Biochemistry
- Adelphi University
- Garden City
- USA
| | - Marly Medard
- Department of Chemistry and Biochemistry
- Adelphi University
- Garden City
- USA
| | - Cyrus Mowdawalla
- Department of Chemistry and Biochemistry
- Adelphi University
- Garden City
- USA
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16
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Tang T, Moon NG, McKay L, Harned AM. New Strategy To Access Enantioenriched Cyclohexadienones: Kinetic Resolution of para-Quinols by Organocatalytic Thiol-Michael Addition Reactions. ACS OMEGA 2018; 3:15492-15500. [PMID: 31458205 PMCID: PMC6643461 DOI: 10.1021/acsomega.8b01787] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 10/31/2018] [Indexed: 06/10/2023]
Abstract
Existing stereoselective routes to 2,5-cyclohexadienones involve either desymmetrization of an achiral substrate or have attempted to perform an asymmetric dearomatization of a phenol. Herein, we report proof-of-principle experiments aimed at developing a kinetic resolution as an alternative method for accessing enantioenriched 2,5-cyclohexadienones. More specifically, chiral bifunctional thiourea catalysts were used to promote the addition of 2-thionapthalene into unsymmetric para-quinols. The selectivity of the kinetic resolution was found to be quite sensitive to substitution around the substrate.
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Affiliation(s)
- Ting Tang
- Department
of Chemistry & Biochemistry, Texas Tech
University, 1204 Boston Avenue, Lubbock, Texas 79409-1061, United States
| | - Nicholas G. Moon
- Department
of Chemistry, University of Minnesota—Twin
Cities, 207 Pleasant
Street SE, Minneapolis, Minnesota 55455, United States
| | - Lydia McKay
- Department
of Chemistry & Biochemistry, Texas Tech
University, 1204 Boston Avenue, Lubbock, Texas 79409-1061, United States
| | - Andrew. M. Harned
- Department
of Chemistry & Biochemistry, Texas Tech
University, 1204 Boston Avenue, Lubbock, Texas 79409-1061, United States
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