1
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Taily IM, Saha D, Banerjee P. Aza-Oxyallyl Cation Driven 3-Amido Oxetane Rearrangement to 2-Oxazolines: Access to Oxazoline Amide Ethers. J Org Chem 2022; 87:2155-2166. [PMID: 35129349 DOI: 10.1021/acs.joc.1c03108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we report a highly facile and unprecedented activation of 3-amido oxetanes to synthesize 2-oxazoline amide ethers using a transient electrophilic aza-oxyallyl cation as an activating as well as an alkylating agent under mild reaction conditions. The aza-oxyallyl cation driven intramolecular rearrangement of 3-amido oxetanes to 2-oxazolines is the hallmark of this transformation and is a new addition to the reactivity profile of aza-oxyallyl cations.
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Affiliation(s)
- Irshad Maajid Taily
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Debarshi Saha
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Prabal Banerjee
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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2
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Abstract
Interrupted reactions reroute established processes to new and often unanticipated end points. Of particular interest are the cases in which a known reactive intermediate takes on a new reaction pathway, either because this pathway is lower in energy or because the conventional pathway is no longer available. Through analysis of documented cases, we aim to dissect the known interrupted reactions and trace their mechanistic origins. As new chemical processes are being discovered at a seemingly ever-increasing pace, it is likely that new interrupted reactions will continue to emerge. Our hope is that the cases considered in this Review will help identify new classes of these fascinating transformations.
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3
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Fu C, Kelley SP, Tu J, Harmata M. Generation of the 7-Azabicyclo[4.3.1]decane Ring System via (4 + 3) Cycloaddition of Oxidopyridinium Ions. J Org Chem 2021; 86:7028-7037. [PMID: 33947183 DOI: 10.1021/acs.joc.1c00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxidopyridinium ions bearing an ester group at the 5-position undergo (4 + 3) cycloaddition reaction to afford congeners of 7-azabicyclo[4.3.1]decane. The reaction generally proceeds in high yield, although an excess of diene is often required to achieve such yields. The reaction is highly regioselective, but not endo/exo selective. It appears the cycloaddition process can be either kinetically or thermodynamically controlled, depending on the nature of the diene used and the reaction time. An intramolecular Heck reaction was used to demonstrate that some chemistry is possible with the cycloadducts.
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Affiliation(s)
- Chencheng Fu
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
| | - Steven P Kelley
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
| | - Jianzhuo Tu
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
| | - Michael Harmata
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
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4
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Mochimatsu T, Aota Y, Kano T, Maruoka K. CuCl
2
‐Mediated Oxidative Intramolecular α‐Arylation of Ketones with Phenolic Nucleophiles via Oxy‐Allyl Cation Intermediates. Chem Asian J 2020; 15:3816-3819. [DOI: 10.1002/asia.202001032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/01/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Takuto Mochimatsu
- Department of Chemistry Graduate School of Science Kyoto University Sakyo, Kyoto 606-8502 Japan
| | - Yusuke Aota
- Department of Chemistry Graduate School of Science Kyoto University Sakyo, Kyoto 606-8502 Japan
| | - Taichi Kano
- Department of Chemistry Graduate School of Science Kyoto University Sakyo, Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of Chemistry Graduate School of Science Kyoto University Sakyo, Kyoto 606-8502 Japan
- Graduate School of Pharmaceutical Sciences Kyoto University Sakyo, Kyoto 606-8501 Japan
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
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5
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Declas N, Waser J. Access to Vinyl Ethers and Ketones with Hypervalent Iodine Reagents as Oxy‐Allyl Cation Synthetic Equivalents. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006707] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Nina Declas
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306 1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306 1015 Lausanne Switzerland
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6
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Declas N, Waser J. Access to Vinyl Ethers and Ketones with Hypervalent Iodine Reagents as Oxy-Allyl Cation Synthetic Equivalents. Angew Chem Int Ed Engl 2020; 59:18256-18260. [PMID: 32542955 DOI: 10.1002/anie.202006707] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/08/2020] [Indexed: 12/18/2022]
Abstract
We report an Umpolung strategy of enol ethers to generate oxy-allyl cation equivalents based on the use of hypervalent iodine reagents. Under mild basic conditions, the addition of nucleophiles to aryloxy-substituted vinylbenziodoxolone (VBX) reagents, easily available in two steps from silyl alkynes, resulted in the stereoselective formation of substituted aryl enol ethers. The reaction was most efficient with phenols as nucleophiles, but preliminary results were also achieved for C- and N- nucleophiles. In absence of external nucleophiles, the 2-iodobenzoate group of the reagent was transferred. The obtained aryl enol ethers could then be transformed into α-difunctionalized ketones by oxidation. The described "allyl cation"-like reactivity contrast with the well-established "vinyl-cation" behavior of alkenyl iodonium salts.
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Affiliation(s)
- Nina Declas
- Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306, 1015, Lausanne, Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306, 1015, Lausanne, Switzerland
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7
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Vidhani DV, Gillett JR, Cusido Y, Alabugin IV. [1,5]-Sigmatropic Shifts Regulated by Built-in Frustration. J Phys Chem A 2020; 124:6016-6028. [DOI: 10.1021/acs.jpca.0c03933] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Dinesh V. Vidhani
- Department of Math & Natural Science, Miami Dade College, Miami, Florida, United States
| | - Jared R. Gillett
- Department of Chemistry & Biochemistry, University of Wisconsin, La Crosse, Wisconsin, United States
| | - Yanet Cusido
- Department of Math & Natural Science, Miami Dade College, Miami, Florida, United States
| | - Igor V. Alabugin
- Department of Chemistry & Biochemistry, Florida State University, Tallahassee, Florida, United States
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8
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Aota Y, Doko Y, Kano T, Maruoka K. Brønsted Acid-Catalyzed Intramolecular α-Arylation of Ketones with Phenolic Nucleophiles via Oxy-Allyl Cation Intermediates. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000169] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yusuke Aota
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Yuki Doko
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Taichi Kano
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo 606-8502 Kyoto Japan
- Graduate School of Pharmaceutical Sciences; Kyoto University; Sakyo 606-8501 Kyoto Japan
- School of Chemical Engineering and Light Industry; Guangdong University of Technology; 510006 Guangzhou China
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9
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Ring opening [3 + 2] cyclization of azaoxyallyl cations with benzo[d]isoxazoles: Efficient access to 2-hydroxyaryl-oxazolines. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.09.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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10
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Abe T, Hirao S, Kitamori M, Itoh T, Chiba Y. A Mild Bischler–Napieralski-Type Cyclization of Trichloromethyl Carbamates for the Synthesis of β-Carbolinones. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Bisag GD, Ruggieri S, Fochi M, Bernardi L. Sulfoxonium ylides: simple compounds with chameleonic reactivity. Org Biomol Chem 2020; 18:8793-8809. [DOI: 10.1039/d0ob01822h] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Sulfoxonium ylides, manageable compounds with an appealing safety profile, adapt to reaction partners like chameleons to their environment, resulting in a variety of useful, and sometimes surprising and unique, reactions.
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Affiliation(s)
- Giorgiana Denisa Bisag
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Silvia Ruggieri
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU Bologna
- Alma Mater Studiorum – University of Bologna
- 40136 Bologna
- Italy
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12
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Huang WH, Huang GB, Zhu WR, Weng J, Lu G. Transition metal-free synthesis of α-aryl ketones via oxyallyl cation capture with arylboronic acids. Org Chem Front 2020. [DOI: 10.1039/d0qo00447b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
α-Arylated ketones were accessed via oxyallyl cation capture with arylboronic acids in good yields with broad substrate tolerance.
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Affiliation(s)
- Wei-Hua Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gong-Bin Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Wen-Run Zhu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
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13
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Vulovic B, Trmcic M, Matovic R, Saicic RN. Cyclization Reactions of Oxyallyl Cation. A Method for Cyclopentane Ring Formation. Org Lett 2019; 21:9618-9621. [PMID: 31769692 DOI: 10.1021/acs.orglett.9b03791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Unsaturated oxyallyl cations with a suitably positioned alkene bond undergo 5-exo-cyclization with the formation of vinylcyclopentane derivatives. Alkyne analogues provide allenes. The reaction proceeds with a moderate to excellent level of stereoselectivity and allows for asymmetric induction in the reaction with chiral substrate.
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Affiliation(s)
- Bojan Vulovic
- Faculty of Chemistry , University of Belgrade , Studentski trg 16 , P.O. Box 51, 11158 Belgrade , Serbia
| | - Milena Trmcic
- Innovation Centre of the Faculty of Chemistry , University of Belgrade , 11158 Belgrade , Serbia
| | - Radomir Matovic
- ICTM Center for Chemistry , Njegoseva 12 , 11158 Belgrade , Serbia
| | - Radomir N Saicic
- Faculty of Chemistry , University of Belgrade , Studentski trg 16 , P.O. Box 51, 11158 Belgrade , Serbia.,Serbian Academy of Sciences and Arts , Knez Mihailova 35 , 11158 Belgrade , Serbia
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14
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Clare D, Dobson BC, Inglesby PA, Aïssa C. Chemospecific Cyclizations of α-Carbonyl Sulfoxonium Ylides on Aryls and Heteroaryls. Angew Chem Int Ed Engl 2019; 58:16198-16202. [PMID: 31507055 PMCID: PMC6856693 DOI: 10.1002/anie.201910821] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/10/2019] [Indexed: 11/07/2022]
Abstract
The functionalization of aryl and heteroaryls using α-carbonyl sulfoxonium ylides without the help of a directing group has remained so far a neglected area, despite the advantageous safety profile of sulfoxonium ylides. Described herein are the cyclizations of α-carbonyl sulfoxonium ylides onto benzenes, benzofurans and N-p-toluenesulfonyl indoles in the presence of a base in HFIP, whereas pyrroles and N-methyl indoles undergo cyclization in the presence of an iridium catalyst. Significantly, these two sets of conditions are chemospecific for each groups of substrates.
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Affiliation(s)
- Daniel Clare
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Benjamin C. Dobson
- Pharmaceutical Technology and DevelopmentAstraZeneca Macclesfield CampusCheshireSK10 2NAUK
| | - Phillip A. Inglesby
- Pharmaceutical Technology and DevelopmentAstraZeneca Macclesfield CampusCheshireSK10 2NAUK
| | - Christophe Aïssa
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
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15
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Clare D, Dobson BC, Inglesby PA, Aïssa C. Chemospecific Cyclizations of α‐Carbonyl Sulfoxonium Ylides on Aryls and Heteroaryls. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910821] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Daniel Clare
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
| | - Benjamin C. Dobson
- Pharmaceutical Technology and DevelopmentAstraZeneca Macclesfield Campus Cheshire SK10 2NA UK
| | - Phillip A. Inglesby
- Pharmaceutical Technology and DevelopmentAstraZeneca Macclesfield Campus Cheshire SK10 2NA UK
| | - Christophe Aïssa
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
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16
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Zhang W, Chu J, Cyr AM, Yueh H, Brown LE, Wang TT, Pelletier J, Porco JA. Intercepted Retro-Nazarov Reaction: Syntheses of Amidino-Rocaglate Derivatives and Their Biological Evaluation as eIF4A Inhibitors. J Am Chem Soc 2019; 141:12891-12900. [PMID: 31310112 PMCID: PMC6693944 DOI: 10.1021/jacs.9b06446] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Rocaglates are a family of natural products isolated from the genus Aglaia which possess a highly substituted cyclopenta[b]benzofuran skeleton and inhibit cap-dependent protein synthesis. Rocaglates are attractive compounds due to their potential for inhibiting tumor cell maintenance in vivo by specifically targeting eukaryotic initiation factor 4A (eIF4A) and interfering with recruitment of ribosomes to mRNA. In this paper, we describe an intercepted retro-Nazarov reaction utilizing intramolecular tosyl migration to generate a reactive oxyallyl cation on the rocaglate skeleton. Trapping of the oxyallyl cation with a diverse range of nucleophiles has been used to generate over 50 novel amidino-rocaglate (ADR) and amino-rocaglate derivatives. Subsequently, these derivatives were evaluated for their ability to inhibit cap-dependent protein synthesis where they were found to outperform previous lead compounds including the rocaglate hydroxamate CR-1-31-B.
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Affiliation(s)
- Wenhan Zhang
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Jennifer Chu
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada, H3G 1Y6
| | - Andrew M. Cyr
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Han Yueh
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Lauren E. Brown
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
| | - Tony T. Wang
- Laboratory of Vector-borne Viral Diseases, Division of Viral Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20903, USA
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada, H3G 1Y6
- Department of Oncology, McGill University, Montreal, Quebec, Canada, H3G 1Y6
- Rosalind & Morris Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada, H3G 1Y6
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, MA 02215, United States of America
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17
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Affiliation(s)
- Samir Z. Zard
- Laboratoire de Synthèse Organique, CNRS UMR 7652Ecole Polytechnique FR-91128 Palaiseau France
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18
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An X, Xiao J. Fluorinated Alcohols: Magic Reaction Medium and Promoters for Organic Synthesis. CHEM REC 2019; 20:142-161. [DOI: 10.1002/tcr.201900020] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/07/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Xiao‐De An
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University
| | - Jian Xiao
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University
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19
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Pinacol rearrangement of cyclopent-3-en-1,2-diols: Cyclopentenone formation and interrupting reaction. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Malone JA, Van Houten JP, Ganiu MO, Nepal B, Kartika R. Brønsted Acid Catalyzed Synthesis of Functionalized 1,4- and 1,6-Dicarbonyl Monosilyl Enol Ethers under Operationally Practical Conditions. J Org Chem 2017; 82:10659-10664. [PMID: 28849920 DOI: 10.1021/acs.joc.7b01687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report an improved protocol for the concise synthesis of functionalized 1,4- and 1,6-dicarbonyl-derived monosilyl enol ethers via ionization of α'-hydroxy silyl enol ethers to generate unsymmetrical silyloxyallyl cations that were subsequently captured by TBS silyl enolates. These transformations were efficiently performed in acetonitrile at room temperature by employing pyridinium triflate as a catalyst. Our new reaction conditions are operationally more practical and broaden the accessibility of various 1,4- and 1,6-dicarbonyl groups, which include diketone, ketoester, and ketothioester functionalities.
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Affiliation(s)
- Joshua A Malone
- Department of Chemistry 232 Choppin Hall Louisiana State University Baton Rouge, Louisiana 70803, United States
| | - Joshua P Van Houten
- Department of Chemistry 232 Choppin Hall Louisiana State University Baton Rouge, Louisiana 70803, United States
| | - Moshood O Ganiu
- Department of Chemistry 232 Choppin Hall Louisiana State University Baton Rouge, Louisiana 70803, United States
| | - Binod Nepal
- Department of Chemistry 232 Choppin Hall Louisiana State University Baton Rouge, Louisiana 70803, United States
| | - Rendy Kartika
- Department of Chemistry 232 Choppin Hall Louisiana State University Baton Rouge, Louisiana 70803, United States
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21
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Jia Q, Li D, Lang M, Zhang K, Wang J. 4-Dimethylaminopyridine-Mediated [3+3] Cycloaddition of Aza-oxyallyl Cations and Nitrones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700415] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Qianfa Jia
- School of Chemical & Environmental Engineering; Wuyi University; Jiangmen 529020 People's Republic of China
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 People's Republic of China
| | - Dongli Li
- School of Chemical & Environmental Engineering; Wuyi University; Jiangmen 529020 People's Republic of China
- International Healthcare Innovation Institute (Jiangmen); Jiangmen 529020 People's Republic of China
| | - Ming Lang
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 People's Republic of China
| | - Kun Zhang
- School of Chemical & Environmental Engineering; Wuyi University; Jiangmen 529020 People's Republic of China
| | - Jian Wang
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 People's Republic of China
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22
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Schlegel M, Schneider C. Lewis Acid-Catalyzed Nucleophilic Addition of Indoles to in Situ-Generated 2-Amidoallyl Cations. J Org Chem 2017; 82:5986-5992. [DOI: 10.1021/acs.joc.7b00791] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Marcel Schlegel
- Institut für Organische
Chemie, University of Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
| | - Christoph Schneider
- Institut für Organische
Chemie, University of Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
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23
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Jia Q, Du Z, Zhang K, Wang J. [3 + 2] Cycloaddition of aza-oxyallyl cations with aldehydes. Org Chem Front 2017. [DOI: 10.1039/c6qo00526h] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here the [3 + 2] cycloaddition reactions of in situ-generated aza-oxyallyl cations with commercially available aldehydes.
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Affiliation(s)
- Qianfa Jia
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Zhiyun Du
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Kun Zhang
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Jian Wang
- School of Pharmaceutical Sciences
- Tsinghua University
- Beijing
- China
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24
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Malone JA, Cleveland AH, Fronczek FR, Kartika R. Effects of Solvent and Residual Water on Enhancing the Reactivity of Six-Membered Silyloxyallyl Cations toward Nucleophilic Addition. Org Lett 2016; 18:4408-11. [DOI: 10.1021/acs.orglett.6b02194] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joshua A. Malone
- Department of Chemistry, 232 Choppin Hall, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
| | - Alexander H. Cleveland
- Department of Chemistry, 232 Choppin Hall, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
| | - Frank R. Fronczek
- Department of Chemistry, 232 Choppin Hall, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
| | - Rendy Kartika
- Department of Chemistry, 232 Choppin Hall, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
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25
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Ayala CE, Dange NS, Stepherson JR, Henry JL, Fronczek FR, Kartika R. Functionalization of Silyldienol Ethers at the γ-Position via 2-Silyloxypentadienyl Cations. Org Lett 2016; 18:1084-7. [PMID: 26867094 DOI: 10.1021/acs.orglett.6b00196] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This report describes Brønsted acid catalyzed de novo synthesis of silyldienol ethers bearing tetrasubstituted double bonds via an intermediacy of 2-silyloxypentadienyl cations. The reactivity of these novel cationic intermediates could be modulated and harnessed toward direct nucleophilic additions regioselectively at the γ-position to produce highly functionalized silyldienol ethers with tunable control of the resulting double bond geometry.
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Affiliation(s)
- Caitlan E Ayala
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Nitin S Dange
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Jacob R Stepherson
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Jeffrey L Henry
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Frank R Fronczek
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - Rendy Kartika
- Department of Chemistry, Louisiana State University , 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
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Stepherson JR, Fronczek FR, Kartika R. An expedient synthesis of functionalized 1,4-diketone-derived compounds via silyloxyallyl cation intermediates. Chem Commun (Camb) 2016; 52:2300-3. [DOI: 10.1039/c5cc09763k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein we describe the synthesis of highly functionalized 1,4-diketones that are readily differentiated as monosilylenol ethers via direct capture of silyloxyallyl cations by silyl enolates under Brønsted acid catalysis.
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Affiliation(s)
- Jacob R. Stepherson
- Department of Chemistry
- 232 Choppin Hall
- Louisiana State University
- Baton Rouge
- USA
| | - Frank R. Fronczek
- Department of Chemistry
- 232 Choppin Hall
- Louisiana State University
- Baton Rouge
- USA
| | - Rendy Kartika
- Department of Chemistry
- 232 Choppin Hall
- Louisiana State University
- Baton Rouge
- USA
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27
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DiPoto M, Hughes RP, Wu J. Dearomative Indole (3 + 2) Reactions with Azaoxyallyl Cations--New Method for the Synthesis of Pyrroloindolines. J Am Chem Soc 2015; 137:14861-4. [PMID: 26562355 PMCID: PMC4669536 DOI: 10.1021/jacs.5b10221] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Indexed: 12/23/2022]
Abstract
Herein, we report the first examples of the synthesis of pyrroloindolines by means of (3 + 2) dearomative annulation reactions between 3-substituted indoles and highly reactive azaoxyallyl cations. Computational studies using density functional theory (DFT) (B3LYP-D3/6-311G**++) support a stepwise reaction pathway in which initial C-C bond formation takes place at C3 of indole, followed by ring closure to give the observed products. Insights gleaned from these calculations indicate that the solvent, either TFE or HFIP, can stabilize the transition state through H-bonding interactions with oxygen of the azaoxyallyl cation and other relevant intermediates, thereby increasing the rates of these reactions.
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Affiliation(s)
- Maria
C. DiPoto
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Russell P. Hughes
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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28
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Dange NS, Stepherson JR, Ayala CE, Fronczek FR, Kartika R. Cooperative benzylic-oxyallylic stabilized cations: regioselective construction of α-quaternary centers in ketone-derived compounds. Chem Sci 2015; 6:6312-6319. [PMID: 30090249 PMCID: PMC6054113 DOI: 10.1039/c5sc01914a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 07/20/2015] [Indexed: 11/23/2022] Open
Abstract
We describe a novel reactivity of benzylic-stabilized oxyallyl cations towards regioselective construction of carbon quaternary centers. These synthetically useful intermediates were readily generated upon ionization of aryl substituted α-hydroxy methylenol ethers with catalytic, mild Brønsted acid. The emerging unsymmetrical oxyallyl cations were then directly captured by indoles and other nucleophiles with exquisite control of regioselectivity, predictably at the electrophilic carbon bearing the alkyl substituent to produce highly functionalized, value-added enol ethers.
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Affiliation(s)
- Nitin S Dange
- Department of Chemistry , Louisiana State University , 232 Choppin Hall , Baton Rouge , LA 70810 , USA .
| | - Jacob R Stepherson
- Department of Chemistry , Louisiana State University , 232 Choppin Hall , Baton Rouge , LA 70810 , USA .
| | - Caitlan E Ayala
- Department of Chemistry , Louisiana State University , 232 Choppin Hall , Baton Rouge , LA 70810 , USA .
| | - Frank R Fronczek
- Department of Chemistry , Louisiana State University , 232 Choppin Hall , Baton Rouge , LA 70810 , USA .
| | - Rendy Kartika
- Department of Chemistry , Louisiana State University , 232 Choppin Hall , Baton Rouge , LA 70810 , USA .
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29
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Ayala CE, Dange NS, Fronczek FR, Kartika R. Brønsted Acid Catalyzed α′-Functionalization of Silylenol Ethers with Indoles. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409758] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Ayala CE, Dange NS, Fronczek FR, Kartika R. Brønsted Acid Catalyzed α′-Functionalization of Silylenol Ethers with Indoles. Angew Chem Int Ed Engl 2015; 54:4641-5. [DOI: 10.1002/anie.201409758] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 01/21/2015] [Indexed: 11/10/2022]
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31
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Luo J, Jiang Q, Chen H, Tang Q. Catalyst-free formation of 1,4-diketones by addition of silyl enolates to oxyallyl zwitterions in situ generated from α-haloketones. RSC Adv 2015. [DOI: 10.1039/c5ra12244a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here we report an efficient and practical method for the preparation of 1,4-diketones by direct coupling of α-haloketones with silyl enolates at room temperature. No catalysts were required in our protocol.
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Affiliation(s)
- Juan Luo
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Qihua Jiang
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Hao Chen
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Qiang Tang
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
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Abstract
The (3+2)-cycloaddition reaction involving oxyallyl cations has proven to be a versatile and efficient approach for the construction of five-membered carbo- and heterocycles, which are prevalent frameworks in natural products and pharmaceuticals. The following article will provide a brief summary of recent disclosures on this process featuring chemo-, regio- and diastereoselective oxyallyl cycloadditions with both electron-rich and electron-deficient 2π partners.
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Affiliation(s)
- Hui Li
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA
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33
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Barnes KL, Koster AK, Jeffrey CS. Trapping the elusive aza-oxyallylic cation: new opportunities in heterocycloaddition chemistry. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.050] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Li H, Hughes RP, Wu J. Dearomative Indole (3 + 2) Cycloaddition Reactions. J Am Chem Soc 2014; 136:6288-96. [DOI: 10.1021/ja412435b] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hui Li
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Russell P. Hughes
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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35
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Haibach MC, Seidel D. C-H-Funktionalisierung über intramolekularen Hydridtransfer. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201306489] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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36
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Haibach MC, Seidel D. CH Bond Functionalization through Intramolecular Hydride Transfer. Angew Chem Int Ed Engl 2014; 53:5010-36. [DOI: 10.1002/anie.201306489] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Michael C. Haibach
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901 (USA) seidel.rutchem.rutgers.edu http://www.seidel‐group.com
| | - Daniel Seidel
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901 (USA) seidel.rutchem.rutgers.edu http://www.seidel‐group.com
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37
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Luo J, Zhou H, Hu J, Wang R, Tang Q. Efficient catalytic-free method to produce α-aryl cycloalkanones through highly chemoselective coupling of aryl compounds with oxyallyl cations. RSC Adv 2014. [DOI: 10.1039/c4ra01043d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Efficient catalytic-free method to produce α-aryl cycloalkanones through highly chemoselective coupling of aryl compounds with oxyallyl cations at room temperature.
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Affiliation(s)
- Juan Luo
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
- The Faculty of Laboratory Medicine
| | - Hui Zhou
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
| | - Jiwei Hu
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
| | - Rui Wang
- School of Pharmacy & Bioengineering
- Chongqing University of Technology
- Chongqing 400054, P. R. China
| | - Qiang Tang
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016, P. R. China
- The Faculty of Laboratory Medicine
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38
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Gao X, Harmata M. Formation and ring-opening of 8-oxabicyclo[3.2.1]oct-6-en-3-ones from (4+3)-cycloaddition of furan and chlorocyclopentanone derivatives. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.05.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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39
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Gao X, Gaddam V, Altenhofer E, Tata RR, Cai Z, Yongpruksa N, Garimallaprabhakaran AK, Harmata M. CH Activation in S-Alkenyl Sulfoximines: An Endo 1,5-Hydrogen Migration. Angew Chem Int Ed Engl 2012; 51:7016-9. [DOI: 10.1002/anie.201203258] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 05/11/2012] [Indexed: 11/10/2022]
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40
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41
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Tang Q, Chen X, Tiwari B, Chi YR. Addition of indoles to oxyallyl cations for facile access to α-indole carbonyl compounds. Org Lett 2012; 14:1922-5. [PMID: 22455439 DOI: 10.1021/ol300591z] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A direct coupling of unprotected indoles and α-halo ketones via in situ generated oxyallyl cation intermediates is described. The reactions efficiently afford α-indole carbonyl compounds with good to quantitative yields.
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Affiliation(s)
- Qiang Tang
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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42
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Jeffrey CS, Barnes KL, Eickhoff JA, Carson CR. Generation and Reactivity of Aza-Oxyallyl Cationic Intermediates: Aza-[4 + 3] Cycloaddition Reactions for Heterocycle Synthesis. J Am Chem Soc 2011; 133:7688-91. [DOI: 10.1021/ja201901d] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Korry L. Barnes
- Department of Chemistry, University of Nevada—Reno, Reno, Nevada 89557, United States
| | - John A. Eickhoff
- Department of Chemistry, University of Nevada—Reno, Reno, Nevada 89557, United States
| | - Christopher R. Carson
- Department of Chemistry, University of Nevada—Reno, Reno, Nevada 89557, United States
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43
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Okada Y, Nishimoto A, Akaba R, Chiba K. Electron-Transfer-Induced Intermolecular [2 + 2] Cycloaddition Reactions Based on the Aromatic “Redox Tag” Strategy. J Org Chem 2011; 76:3470-6. [DOI: 10.1021/jo200490q] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yohei Okada
- Department of Applied Life Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Asaki Nishimoto
- Department of Applied Life Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Ryoichi Akaba
- Department of Chemistry, Gunma College of Technology, 580 Toriba-machi, Maebashi, Gunma 371-8530, Japan
| | - Kazuhiro Chiba
- Department of Applied Life Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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44
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Abstract
Aminobenzaldehydes react with indoles in an unprecedented cascade reaction. This acid-catalyzed redox-neutral annulation proceeds via a condensation/1,5-hydride shift/ring-closure sequence. Polycyclic azepinoindoles and related compounds are obtained in a single step with good to excellent yields.
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Affiliation(s)
- Michael C Haibach
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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45
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Harmata M. The (4+3)-cycloaddition reaction: simple allylic cations as dienophiles. Chem Commun (Camb) 2010; 46:8886-903. [PMID: 21057692 DOI: 10.1039/c0cc03620j] [Citation(s) in RCA: 258] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Michael Harmata
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA.
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46
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Stoll AH, Blakey SB. Rhodium Catalyzed Allene Amination: Diastereoselective Synthesis of Aminocyclopropanes via a 2-Amidoallylcation Intermediate. J Am Chem Soc 2009; 132:2108-9. [DOI: 10.1021/ja908538t] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Armin H. Stoll
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Simon B. Blakey
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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47
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Heng R, Quiclet-Sire B, Zard SZ. Substitution of chlorocyclobutanones with xanthate salts. The remarkable effect of added base. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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