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Kotha S, Mehta G, Jena K. Synthetic Approach toward Diverse Oxa-Cages via Olefin Metathesis. J Org Chem 2024; 89:5952-5965. [PMID: 38652151 DOI: 10.1021/acs.joc.3c02624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
This article demonstrates a late-stage modification of the cage propellanes that are transformed into intricate oxa-cycles via ring-rearrangement metathesis (RRM) and regioselective ring-closing metathesis (RCM) as crucial steps. In addition, we also report the extended pentacycloundecane (PCUD)-based oxa-cages involving the domino cycloetherification followed by olefin metathesis. These oxa-cages involve a domino sequence in which the PCUD core unit remains intact. [Ru]-based Grubbs catalysts are used to execute the metathesis step to assemble these higher-order oxa-cage systems. Spectroscopic data assigned structures of various products and were further supported by single-crystal X-ray diffraction analysis. The synthetic approach to these cage polycycles involves high complexity generating processes such as Diels-Alder reaction, [2 + 2] photocycloaddition, and RRM as well as RCM.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Gulazarahind Mehta
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Kunkumita Jena
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai 400076, India
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2
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Kotha S, Mehta G. Molecular Acrobatics in Polycyclic Frames: Synthesis of "Kurmanediol" via Post-synthetic Modification of Cage Molecules by Olefinic Metathesis. J Org Chem 2023; 88:11650-11660. [PMID: 37506281 DOI: 10.1021/acs.joc.3c00968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
We report late-stage ring-opening metathesis (ROM), ring-rearrangement metathesis (RRM), and ring-closing metathesis (RCM) approaches to generate expanded pentacycloundecane (PCUD) cage derivatives. These higher-order intricate polycyclic cage systems are aesthetically pleasing and structurally intriguing. Their assembly maintains molecular symmetry during the entire synthetic sequence. To this end, metathesis-based catalysts are used to execute the ROM, RRM, and RCM strategies. The synthetic approach to these cage polycycles involves the Diels-Alder reaction, [2 + 2] photocycloaddition, RRM, ROM, and RCM as key steps.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Institution Indian Institute of Technology, Powai, Mumbai 400076, India
| | - Gulazarahind Mehta
- Department of Chemistry, Institution Indian Institute of Technology, Powai, Mumbai 400076, India
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3
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Semghouli A, Remete AM, Kiss L. Stereocontrolled synthesis of some novel functionalized heterocyclic amino ester and amide derivatives with multiple stereocenters. RSC Adv 2023; 13:22769-22776. [PMID: 37520097 PMCID: PMC10372476 DOI: 10.1039/d3ra03866a] [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: 06/09/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023] Open
Abstract
The synthesis of some novel functionalized fused-ring β-amino lactones and lactams with multiple chiral centers has been attempted from readily available strained bicyclic β-amino acids via a stereocontrolled synthetic route. The key step was ring-rearrangement metathesis of allyl/propargyl esters or N-allylated/N-propargylated amides of (oxa)norbornene β-amino acids. The RRM transformations [ring-opening metathesis (ROM)/ring-closing metathesis (RCM) or ring-opening metathesis (ROM)/ring-closing enyne metathesis (RCEYM)] have been investigated using some commercially available catalysts. Importantly, the procedure used in this synthetic process does not affect the configurations of the chiral centers. This means that the structure of the starting (oxa)norbornene β-amino acids predetermines the configuration of the formed products.
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Affiliation(s)
- Anas Semghouli
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
- Institute of Organic Chemistry, Stereochemistry Research Group, Research Centre for Natural Sciences Magyar tudósok krt. 2 H-1117 Budapest Hungary +36-30-1600354
| | - Attila M Remete
- Institute of Pharmaceutical Chemistry, University of Szeged Eötvös u. 6 H-6720 Szeged Hungary
| | - Loránd Kiss
- Institute of Organic Chemistry, Stereochemistry Research Group, Research Centre for Natural Sciences Magyar tudósok krt. 2 H-1117 Budapest Hungary +36-30-1600354
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4
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Nilova A, Mannchen MD, Noel AN, Semenova E, Grenning AJ. Vicinal stereocenters via asymmetric allylic alkylation and Cope rearrangement: a straightforward route to functionally and stereochemically rich heterocycles. Chem Sci 2023; 14:2755-2762. [PMID: 36908968 PMCID: PMC9993902 DOI: 10.1039/d2sc07021a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/13/2023] [Indexed: 02/16/2023] Open
Abstract
An asymmetric allylic alkylation/Cope rearrangement (AAA/[3,3]) capable of stereoselectively constructing vicinal stereocenters has been developed. Strategically integrated 4-methylation on the 3,3-dicyano-1,5-diene controls stereoselectivity and drives Cope rearrangement equilibrium in the forward direction. The AAA/[3,3] sequence rapidly converts abundant achiral and racemic starting materials into valuable (hetero)cycloalkane building blocks bearing significant functional and stereochemical complexity, highlighting the value of (hetero)cyclohexylidenemalononitriles as launching points for complex heterocycle synthesis. On this line, the resulting alkylidenemalononitrile moiety can be readily converted into amides via Hayashi-Lear amidation to ultimately yield amido-piperidines, tropanes, and related scaffolds with 3-5 stereocenters and drug-like functionality.
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Affiliation(s)
- Aleksandra Nilova
- Department of Chemistry, University of Florida PO Box 117200 Gainesville 32611 FL USA
| | - Michael D Mannchen
- Department of Chemistry, University of Florida PO Box 117200 Gainesville 32611 FL USA
| | - Abdias N Noel
- Department of Chemistry, University of Florida PO Box 117200 Gainesville 32611 FL USA
| | - Evgeniya Semenova
- Department of Chemistry, University of Florida PO Box 117200 Gainesville 32611 FL USA
| | - Alexander J Grenning
- Department of Chemistry, University of Florida PO Box 117200 Gainesville 32611 FL USA
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5
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Klein MT, Krause BM, Neudörfl JM, Kühne R, Schmalz HG. Design and synthesis of a tetracyclic tripeptide mimetic frozen in a polyproline type II (PP2) helix conformation. Org Biomol Chem 2022; 20:9368-9377. [PMID: 36385673 DOI: 10.1039/d2ob01857h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A synthesis of the new tetracyclic scaffold ProM-19, which represents a XPP tripeptide unit frozen in a PPII helix conformation, was developed. As a key building block, N-Boc-protected ethyl (1S,3S,4R)-2-azabicyclo[2.2.1]hept-5-ene-2-carboxylate was prepared through a diastereoselective aza-Diels-Alder reaction and subsequent hydrogenolytic removal of the chiral N-1-phenylethyl substituent under temporary protection of the double bond through dihydroxylation and reconstitution by Corey-Winter olefination. The target compound Boc-[ProM-19]-OMe was then prepared via subsequent peptide coupling and Ru-catalyzed ring-closing metathesis steps employing (S)-N-Boc-allylgylcine and cis-5-vinyl-proline methyl ester as additional building blocks. In addition, Ac-[2-Cl-Phe]-[Pro]-[ProM-19]-OMe was prepared by solution phase peptide synthesis as a potential ligand for the ena-VASP EVH1 domain.
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Affiliation(s)
- Marco T Klein
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Bernhard M Krause
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Jörg-Martin Neudörfl
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
| | - Ronald Kühne
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse 10, 13125 Berlin, Germany
| | - Hans-Günther Schmalz
- University of Cologne, Department of Chemistry, Greinstrasse 4, 50939 Köln, Germany.
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6
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Li C, Qi ZC, Li JY, Yang SD. Heck Reaction Boosted Heterocycle Ring-Closing and Ring-Opening Rearrangement: A Strategy for the Synthesis of Indolyl-Type Ligands. J Org Chem 2021; 86:16977-16991. [PMID: 34792365 DOI: 10.1021/acs.joc.1c02117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A novel method for P-involved heterocycle ring-closing-ring-opening rearrangement (HRR) via the Heck reaction is disclosed. The approach enables direct installation of a phosphorus-containing aryl group onto the C2 position of indole. This new rearrangement directly transforms easily prepared indole derivatives into indolyl-derived phosphonates and phosphinic acids with high yields, and many of the products are difficult to obtain by using established methods. This new HRR reaction provides an extremely simple and step-economic method to induce C-C bond formation and P-N bond cleavage for the synthesis of a variety of indolyl-type ligands.
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Affiliation(s)
- Chong Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zhi-Chao Qi
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Jing-Yu Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
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7
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Antonova AS, Vinokurova MA, Kumandin PA, Merkulova NL, Sinelshchikova AA, Grigoriev MS, Novikov RA, Kouznetsov VV, Polyanskii KB, Zubkov FI. Application of New Efficient Hoveyda-Grubbs Catalysts Comprising an N→Ru Coordinate Bond in a Six-Membered Ring for the Synthesis of Natural Product-Like Cyclopenta[ b]furo[2,3- c]pyrroles. Molecules 2020; 25:E5379. [PMID: 33213018 PMCID: PMC7709010 DOI: 10.3390/molecules25225379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/02/2022] Open
Abstract
The ring rearrangement metathesis (RRM) of a trans-cis diastereomer mixture of methyl 3-allyl-3a,6-epoxyisoindole-7-carboxylates derived from cheap, accessible and renewable furan-based precursors in the presence of a new class of Hoveyda-Grubbs-type catalysts, comprising an N→Ru coordinate bond in a six-membered ring, results in the difficult-to-obtain natural product-like cyclopenta[b]furo[2,3-c]pyrroles. In this process, only one diastereomer with a trans-arrangement of the 3-allyl fragment relative to the 3a,6-epoxy bridge enters into the rearrangement, while the cis-isomers polymerize almost completely under the same conditions. The tested catalysts are active in the temperature range from 60 to 120 °C at a concentration of 0.5 mol % and provide better yields of the target tricycles compared to the most popular commercially available second-generation Hoveyda-Grubbs catalyst. The diastereoselectivity of the intramolecular Diels-Alder reaction furan (IMDAF) reaction between starting 1-(furan-2-yl)but-3-en-1-amines and maleic anhydride, leading to 3a,6-epoxyisoindole-7-carboxylates, was studied as well.
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Affiliation(s)
- Alexandra S. Antonova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Marina A. Vinokurova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Pavel A. Kumandin
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Natalia L. Merkulova
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Anna A. Sinelshchikova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russia; (A.A.S.); (M.S.G.)
| | - Mikhail S. Grigoriev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, bld. 4, 119071 Moscow, Russia; (A.A.S.); (M.S.G.)
| | - Roman A. Novikov
- V. A. Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, 119991 Moscow, Russia;
| | - Vladimir V. Kouznetsov
- Laboratorio de Química Orgánica y Biomolecular, CMN, Universidad Industrial de Santander, Parque Tecnológico Guatiguara, Km 2 vía refugio, Piedecuesta A.A. 681011, Colombia;
| | - Kirill B. Polyanskii
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
| | - Fedor I. Zubkov
- Organic Chemistry Department, Faculty of Science, Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya St., 6, 117198 Moscow, Russia; (A.S.A.); (M.A.V.); (P.A.K.); (N.L.M.)
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8
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Kolaříková V, Rybáčková M, Svoboda M, Kvíčala J. Ring-closing metathesis of prochiral oxaenediynes to racemic 4-alkenyl-2-alkynyl-3,6-dihydro-2 H-pyrans. Beilstein J Org Chem 2020; 16:2757-2768. [PMID: 33224302 PMCID: PMC7670115 DOI: 10.3762/bjoc.16.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/28/2020] [Indexed: 11/23/2022] Open
Abstract
The prochiral 4-(allyloxy)hepta-1,6-diynes, optionally modified in the positions 1 and 7 with an alkyl or ester group, undergo a chemoselective ring-closing enyne metathesis yielding racemic 4-alkenyl-2-alkynyl-3,6-dihydro-2H-pyrans. Among the catalysts tested, Grubbs 1st generation precatalyst in the presence of ethene (Mori conditions) gave superior results compared to the more stable Grubbs or Hoveyda-Grubbs 2nd generation precatalysts. This is probably caused by a suppression of the subsequent side-reactions of the enyne metathesis product with ethene. On the other hand, the 2nd generation precatalysts gave better yields in the absence of ethene. The metathesis products, containing both a triple bond and a conjugated system, can be successfully orthogonally modified. For example, the metathesis product of 5-(allyloxy)nona-2,7-diyne reacted chemo- and stereoselectively in a Diels-Alder reaction with N-phenylmaleimide affording the tricyclic products as a mixture of two separable diastereoisomers, the configuration of which was estimated by DFT computations. The reported enediyne metathesis paves the way to the enantioselective enyne metathesis yielding chiral building blocks for compounds with potential biological activity, e.g., norsalvinorin or cacospongionolide B.
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Affiliation(s)
- Viola Kolaříková
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Markéta Rybáčková
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Martin Svoboda
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Jaroslav Kvíčala
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
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9
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Hoveyda AH, Liu Z, Qin C, Koengeter T, Mu Y. Impact of Ethylene on Efficiency and Stereocontrol in Olefin Metathesis: When to Add It, When to Remove It, and When to Avoid It. Angew Chem Int Ed Engl 2020; 59:22324-22348. [DOI: 10.1002/anie.202010205] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/02/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Zhenxing Liu
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Can Qin
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Tobias Koengeter
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Yucheng Mu
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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10
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Hoveyda AH, Liu Z, Qin C, Koengeter T, Mu Y. Impact of Ethylene on Efficiency and Stereocontrol in Olefin Metathesis: When to Add It, When to Remove It, and When to Avoid It. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010205] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Amir H. Hoveyda
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Zhenxing Liu
- Supramolecular Science and Engineering Institute University of Strasbourg CNRS 67000 Strasbourg France
| | - Can Qin
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Tobias Koengeter
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Yucheng Mu
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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11
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Mandal T, Dhara K, Parui N, Dash J. Domino Relay Olefin Metathesis of Triallyl Oxindole and Indole Precursors to Access Cyclic Indoxyls and Carbazoles. ChemCatChem 2020. [DOI: 10.1002/cctc.202000813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tirtha Mandal
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Kalyan Dhara
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Nabin Parui
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Jyotirmayee Dash
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
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12
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Affiliation(s)
- Debjani Si
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Krishna P. Kaliappan
- Department of ChemistryIndian Institute of Technology Bombay Powai Mumbai 400076 India
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13
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Kotha S, Meshram M, Aswar VR. Application of ring-rearrangement metathesis in organic synthesis: A grand design. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151337] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Probasco MS, Johnson DA, Jennings MP. Stereoselective One-Pot Deconjugation, Aldol, and Stabilized Peterson Olefination of α-Trialkylsilyl-β-alkyl-α,β-Unsaturated Esters. Org Lett 2019; 21:1379-1383. [DOI: 10.1021/acs.orglett.9b00069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael S. Probasco
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Johnson
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Michael P. Jennings
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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15
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Navigating around Patented Routes by Preserving Specific Motifs along Computer-Planned Retrosynthetic Pathways. Chem 2019. [DOI: 10.1016/j.chempr.2018.12.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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16
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Datta R, Ghosh S. Domino ring-opening-ring-closing enyne metathesis vs enyne metathesis of norbornene derivatives with alkynyl side chains. Construction of condensed polycarbocycles. Beilstein J Org Chem 2018; 14:2708-2714. [PMID: 30410632 PMCID: PMC6204787 DOI: 10.3762/bjoc.14.248] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022] Open
Abstract
The metathesis of norbornene derivatives with alkynyl side-chain with Grubbs’ ruthenium alkylidine as catalyst has been investigated with the objective of constructing condensed polycyclic structures. This investigation demonstrated that the generally observed domino reaction course involving a ring-opening metathesis of the norbornene unit and a ring-closing enyne metathesis is influenced to a great extent by the nature of the functional group and the substrate structure and may follow a different reaction course than what is usually observed. In cases where ROM–RCEYM occurred, the resulting 1,3-diene reacts in situ with the dienophile to provide condensed tetracyclic systems.
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Affiliation(s)
- Ritabrata Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Subrata Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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17
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Brodzka A, Borys F, Koszelewski D, Ostaszewski R. Studies on the Synthesis of Endocyclic Enol Lactones via a RCM of Selected Vinyl Esters. J Org Chem 2018; 83:8655-8661. [DOI: 10.1021/acs.joc.8b00807] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Brodzka
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Filip Borys
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Dominik Koszelewski
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
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18
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Takao KI, Mori K, Kasuga K, Nanamiya R, Namba A, Fukushima Y, Nemoto R, Mogi T, Yasui H, Ogura A, Yoshida K, Tadano KI. Total Synthesis of Clavilactones. J Org Chem 2018; 83:7060-7075. [DOI: 10.1021/acs.joc.7b03268] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kento Mori
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kenya Kasuga
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ryuki Nanamiya
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ayumi Namba
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yuuki Fukushima
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ryuichi Nemoto
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Takuma Mogi
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Hiroyuki Yasui
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Akihiro Ogura
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Keisuke Yoshida
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kin-ichi Tadano
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Kotha S, Gunta R. Synthesis of Intricate Fused N-Heterocycles via Ring-Rearrangement Metathesis. J Org Chem 2017; 82:8527-8535. [PMID: 28721727 DOI: 10.1021/acs.joc.7b01299] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Herein, a facile synthesis of intricate fused N-heterocycles is disclosed by employing C-H activation and ring-rearrangement metathesis/enyne ring-rearrangement metathesis as key steps. Interestingly, some of these N-heterocyclic products possess the tricyclic core of epimeloscine, deoxycalyciphylline B, daphlongamine H, isodaphlongamine H, and a bioactive alkaloid, annotinolide A, which shows antiaggregation activity against amyloid-β (Aβ)1-42 peptide aggregation. Moreover, various starting materials required in this protocol are easily assembled via C-X bond annulation of 2-bromo-N-protected aniline with norbornadiene or directing group-assisted ruthenium-catalyzed C-H activation of N-methoxybenzamide.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay , Powai, Mumbai 400076, India
| | - Rama Gunta
- Department of Chemistry, Indian Institute of Technology-Bombay , Powai, Mumbai 400076, India
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20
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Dilmaç AM, Spuling E, de Meijere A, Bräse S. Propellane: von chemischen Kuriositäten zu “explosiven” Materialen und Naturstoffen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201603951] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Alicia M. Dilmaç
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Eduard Spuling
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
| | - Armin de Meijere
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Deutschland
| | - Stefan Bräse
- Institut für Organische Chemie (IOC); Karlsruher Institut für Technologie (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Deutschland
- Institut für Toxikologie und Genetik (ITG); Karlsruher Institut für Technologie (KIT); Eggenstein-Leopoldshafen Deutschland
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21
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Dilmaç AM, Spuling E, de Meijere A, Bräse S. Propellanes-From a Chemical Curiosity to "Explosive" Materials and Natural Products. Angew Chem Int Ed Engl 2017; 56:5684-5718. [PMID: 27905166 DOI: 10.1002/anie.201603951] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 10/26/2016] [Indexed: 12/19/2022]
Abstract
Propellanes are a unique class of compounds currently consisting of well over 10 000 representatives, all featuring two more or less inverted tetrahedral carbon atoms that are common to three bridging rings. The central single bond between the two bridgeheads is significantly weakened in the smaller entities, which leads to unusual reactivities of these structurally interesting propeller-like molecules. This Review highlights the synthesis of such propellanes and their occurrence in material sciences, natural products, and medicinal chemistry. The conversion of [1.1.1]propellane into bridgehead derivatives of bicyclo[1.1.1]pentane, including oligomers and polymers with bicyclo[1.1.1]penta-1,3-diyl repeat units, is also featured. A selection of natural products with larger propellane subunits are discussed in detail. Heteropropellanes and inorganic propellanes are also addressed. The historical background is touched in brief to show the pioneering work of David Ginsburg, Günther Snatzke, Kenneth B. Wiberg, Günter Szeimies, and others.
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Affiliation(s)
- Alicia M Dilmaç
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Eduard Spuling
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Armin de Meijere
- Institute of Organic and Biomolecular Chemistry, Georg-August Universität Göttingen, Tammannstrasse 2, 37077, Göttingen, Germany
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany.,Institute of Toxicology and Genetics (ITG), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
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22
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Takao KI, Nemoto R, Mori K, Namba A, Yoshida K, Ogura A. Total Synthesis and Structural Revision of Clavilactone D. Chemistry 2017; 23:3828-3831. [DOI: 10.1002/chem.201700483] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Ryuichi Nemoto
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Kento Mori
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Ayumi Namba
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Keisuke Yoshida
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Akihiro Ogura
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
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Kotha S, Gunta R. Bridgehead vicinal diallylation of norbornene derivatives and extension to propellane derivatives via ring-closing metathesis. Beilstein J Org Chem 2016; 12:1877-1883. [PMID: 27829894 PMCID: PMC5082723 DOI: 10.3762/bjoc.12.177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/03/2016] [Indexed: 01/25/2023] Open
Abstract
Here, we report a simple synthetic strategy to the bridgehead vicinal diallylation of norbornene derivatives. These substrates are useful to generate propellanes via ring-closing metathesis. Single-crystal X-ray diffraction analysis of four compounds led to the realization of configurational correction of earlier reported molecules.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, India
| | - Rama Gunta
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai, India
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Kotha S, Ravikumar O. Ring-Rearrangement-Metathesis Approach to Polycycles: Substrate-Controlled Stereochemical Outcome During Grignard Addition. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600596] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
| | - Ongolu Ravikumar
- Department of Chemistry; Indian Institute of Technology-Bombay; Powai India
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25
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Zieliński GK, Grela K. Tandem Catalysis Utilizing Olefin Metathesis Reactions. Chemistry 2016; 22:9440-54. [DOI: 10.1002/chem.201505136] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Grzegorz K. Zieliński
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Karol Grela
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
- Biological and Chemical Research Centre, Faculty of Chemistry; University of Warsaw; Żwirki i Wigury 101 02-089 Warsaw Poland
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26
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Kotha S, Ravikumar O. Synthesis of fused azacycle via Overman rearrangement and ring-rearrangement metathesis as key steps. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Kotha S, Aswar VR. Target Specific Tactics in Olefin Metathesis: Synthetic Approach to cis-syn-cis-Triquinanes and -Propellanes. Org Lett 2016; 18:1808-11. [DOI: 10.1021/acs.orglett.6b00537] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
| | - Vikas R. Aswar
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400 076, India
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28
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Kotha S, Gunta R. Design and synthesis of propellane derivatives and oxa-bowls via ring-rearrangement metathesis as a key step. Beilstein J Org Chem 2015; 11:1727-31. [PMID: 26664592 PMCID: PMC4660881 DOI: 10.3762/bjoc.11.188] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/10/2015] [Indexed: 11/23/2022] Open
Abstract
Various intricate propellane derivatives and oxa-bowls have been synthesized via a ring-rearrangement metathesis (RRM) as a key step starting from readily accessible starting materials such as p-benzoquinone, 1,4-naphthoquinone and 1,4-anthraquinone.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Rama Gunta
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
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29
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Kotha S, Meshram M, Khedkar P, Banerjee S, Deodhar D. Recent applications of ring-rearrangement metathesis in organic synthesis. Beilstein J Org Chem 2015; 11:1833-64. [PMID: 26664603 PMCID: PMC4660990 DOI: 10.3762/bjoc.11.199] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 09/17/2015] [Indexed: 11/23/2022] Open
Abstract
Ring-rearrangement metathesis (RRM) involves multiple metathesis processes such as ring-opening metathesis (ROM)/ring-closing metathesis (RCM) in a one-pot operation to generate complex targets. RRM delivers complex frameworks that are difficult to assemble by conventional methods. The noteworthy point about this type of protocol is multi-bond formation and it is an atom economic process. In this review, we have covered literature that appeared during the last seven years (2008–2014).
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400 076, India.
| | - Milind Meshram
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400 076, India.
| | - Priti Khedkar
- Department of Chemistry, Guru Nanak Khalsa College of Arts, Science & Commerce, Matunga, Mumbai-400 019, India
| | - Shaibal Banerjee
- Department of Applied Chemistry, Defence Institute of Advanced Technology (DU), Girinagar, Pune-411025, Pune, India
| | - Deepak Deodhar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400 076, India.
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30
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Wałejko P, Dąbrowski M, Szczepaniak L, Morzycki JW, Witkowski S. Stereochemistry of ring-opening/cross metathesis reactions of exo- and endo-7-oxabicyclo[2.2.1]hept-5-ene-2-carbonitriles with allyl alcohol and allyl acetate. Beilstein J Org Chem 2015; 11:1893-901. [PMID: 26664608 PMCID: PMC4661012 DOI: 10.3762/bjoc.11.204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 09/23/2015] [Indexed: 11/24/2022] Open
Abstract
The ROCM reactions of exo- and endo-2-cyano-7-oxanorbornenes with allyl alcohol or allyl acetate promoted by different ruthenium alkylidene catalysts were studied. The stereochemical outcome of the reactions was established. The issues concerning chemo- (ROCM vs ROMP), regio- (1-2- vs 1-3-product formation), and stereo- (E/Z isomerism) selectivity of reactions under various conditions are discussed. Surprisingly good yields of the ROCM products were obtained under neat conditions.
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Affiliation(s)
- Piotr Wałejko
- Institute of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
| | - Michał Dąbrowski
- Institute of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
| | - Lech Szczepaniak
- Institute of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
| | - Jacek W Morzycki
- Institute of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
| | - Stanisław Witkowski
- Institute of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
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31
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Kotha S, Ravikumar O, Majhi J. Synthesis of a tricyclic lactam via Beckmann rearrangement and ring-rearrangement metathesis as key steps. Beilstein J Org Chem 2015; 11:1503-8. [PMID: 26425207 PMCID: PMC4578362 DOI: 10.3762/bjoc.11.163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/12/2015] [Indexed: 11/23/2022] Open
Abstract
A tricyclic lactam is reported in a four step synthesis sequence via Beckmann rearrangement and ring-rearrangement metathesis as key steps. Here, we used a simple starting material such as dicyclopentadiene.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Ongolu Ravikumar
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Jadab Majhi
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
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32
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Kotha S, Gunta R. Design and synthesis of polycyclic sulfones via Diels-Alder reaction and ring-rearrangement metathesis as key steps. Beilstein J Org Chem 2015; 11:1373-8. [PMID: 26425192 PMCID: PMC4578373 DOI: 10.3762/bjoc.11.148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/20/2015] [Indexed: 11/23/2022] Open
Abstract
Here, we describe a new and simple synthetic strategy to various polycyclic sulfones via Diels–Alder reaction and ring-rearrangement metathesis (RRM) as the key steps. This approach delivers tri- and tetracyclic sulfones with six (n = 1), seven (n = 2) or eight-membered (n = 3) fused-ring systems containing trans-ring junctions unlike the conventional all cis-ring junctions generally obtained during the RRM sequence. Interestingly the starting materials used are simple and commercially available.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Rama Gunta
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
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Yang S, Yuan W, Xu Q, Shi M. Iron(III)‐Catalyzed Cycloisomerizations of Acetal–Vinylidenecyclopropanes: An Efficient Synthetic Route to 1,2‐Disubstituted Cyclobutenes. Chemistry 2015; 21:15964-9. [PMID: 26383049 DOI: 10.1002/chem.201502634] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Song Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237 (P. R. China)
| | - Wei Yuan
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032 (P. R. China)
| | - Qin Xu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237 (P. R. China)
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Meilong Road No. 130, Shanghai, 200237 (P. R. China)
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032 (P. R. China)
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34
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Borguet Y, Zaragoza G, Demonceau A, Delaude L. Ruthenium catalysts bearing a benzimidazolylidene ligand for the metathetical ring-closure of tetrasubstituted cycloolefins. Dalton Trans 2015; 44:9744-55. [PMID: 25734488 DOI: 10.1039/c5dt00433k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Deprotonation of 1,3-di(2-tolyl)benzimidazolium tetrafluoroborate with a strong base afforded 1,3-di(2-tolyl)benzimidazol-2-ylidene (BTol), which dimerized progressively into the corresponding dibenzotetraazafulvalene. The complexes [RhCl(COD)(BTol)] (COD is 1,5-cyclooctadiene) and cis-[RhCl(CO)2(BTol)] were synthesized to probe the steric and electronic parameters of BTol. Comparison of the percentage of buried volume (%VBur) and of the Tolman electronic parameter (TEP) of BTol with those determined previously for 1,3-dimesitylbenzimidazol-2-ylidene (BMes) revealed that the two N-heterocyclic carbenes displayed similar electron donicities, yet the 2-tolyl substituents took a slightly greater share of the rhodium coordination sphere than the mesityl groups, due to a more pronounced tilt. The anti,anti conformation adopted by BTol in the molecular structure of [RhCl(COD)(BTol)] ensured nonetheless a remarkably unhindered access to the metal center, as evidenced by steric maps. Second-generation ruthenium-benzylidene and isopropoxybenzylidene complexes featuring the BTol ligand were obtained via phosphine exchange from the first generation Grubbs and Hoveyda-Grubbs catalysts, respectively. The atropisomerism of the 2-tolyl substituents within [RuCl2(=CHPh)(PCy3)(BTol)] was investigated by using variable temperature NMR spectroscopy, and the molecular structures of all four possible rotamers of [RuCl2(=CH-o-O(i)PrC6H4)(BTol)] were determined by X-ray crystallography. Both complexes were highly active at promoting the ring-closing metathesis (RCM) of model α,ω-dienes. The replacement of BMes with BTol was particularly beneficial to achieve the ring-closure of tetrasubstituted cycloalkenes. More specifically, the stable isopropoxybenzylidene chelate enabled an almost quantitative RCM of two challenging substrates, viz., diethyl 2,2-bis(2-methylallyl)malonate and N,N-bis(2-methylallyl)tosylamide, within a few hours at 60 °C.
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Affiliation(s)
- Yannick Borguet
- Laboratory of Organometallic Chemistry and Homogeneous Catalysis, Institut de Chimie (B6a), Université de Liège, Sart-Tilman par 4000, Liège, Belgium.
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Kotha S, Ravikumar O. Design and synthesis of fused polycycles via Diels-Alder reaction and ring-rearrangement metathesis as key steps. Beilstein J Org Chem 2015; 11:1259-64. [PMID: 26425184 PMCID: PMC4578369 DOI: 10.3762/bjoc.11.140] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 07/08/2015] [Indexed: 11/25/2022] Open
Abstract
Atom efficient processes such as the Diels–Alder reaction (DA) and the ring-rearrangement metathesis (RRM) have been used to design new polycycles. In this regard, ruthenium alkylidene catalysts are effective in realizing the RRM of bis-norbornene derivatives prepared by DA reaction and Grignard addition. Here, fused polycycles are assembled which are difficult to produce by conventional synthetic routes.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
| | - Ongolu Ravikumar
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400 076, India
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36
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Takao KI, Yoshida K, Tadano KI. Total Synthesis of Natural Products Using Sequential Olefin Metathesis Reactions. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.1192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Plumet J, Roscales S. Terpenoids Bearing the 7-Oxabicyclo[2.2.1]heptane (7-Oxanorbornane) Skeleton. Natural Sources, Biological Activities and Chemical Synthesis. HETEROCYCLES 2015. [DOI: 10.3987/rev-14-sr(k)3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kotha S, Dipak MK. Design and synthesis of novel bis-annulated caged polycycles via ring-closing metathesis: pushpakenediol. Beilstein J Org Chem 2014; 10:2664-70. [PMID: 25550729 PMCID: PMC4273234 DOI: 10.3762/bjoc.10.280] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 10/31/2014] [Indexed: 11/24/2022] Open
Abstract
Intricate caged molecular frameworks are assembled by an atom economical process via a Diels-Alder (DA) reaction, a Claisen rearrangement, a ring-closing metathesis (RCM) and an alkenyl Grignard addition. The introduction of olefinic moieties in the pentacycloundecane (PCUD) framework at appropriate positions followed by RCM led to the formation of novel heptacyclic cage systems.
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Affiliation(s)
- Sambasivarao Kotha
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, India, Fax: 022-2572 7152
| | - Mirtunjay Kumar Dipak
- Department of Chemistry, Indian Institute of Technology-Bombay, Powai, India, Fax: 022-2572 7152
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Halle MB, Fernandes RA. A relay ring-opening/double ring-closing metathesis strategy for the bicyclic macrolide-butenolide core structures. RSC Adv 2014. [DOI: 10.1039/c4ra10937f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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40
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Kotha S, Ravikumar O. Design and synthesis of oxa-bowls via Diels–Alder reaction and ring-rearrangement metathesis as key steps. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.108] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Kotha S, Ravikumar O. Diversity-Oriented Approach to Carbocycles and Heterocycles through Ring-Rearrangement Metathesis, Fischer Indole Cyclization, and Diels-Alder Reaction as Key Steps. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402273] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Wallace DJ, Reamer RA. Ring-closing metathesis reactions of bis(enynes): selectivity and surprises. J Org Chem 2014; 79:5644-51. [PMID: 24856288 DOI: 10.1021/jo500815q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A study of the ring-closing metathesis reactions of two bis(enynes) is presented. These substrates, which contain two alkenes and two alkynes, as well as a resident stereocenter, can potentially generate metathesis products resulting from many reaction pathways. In this contribution we present our results on these reactions, show how small changes in reaction conditions can lead to different product ratios, and attempt to provide a rationale for the outcomes.
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Affiliation(s)
- Debra J Wallace
- Department of Process Chemistry, Merck Research Laboratories , PO Box 2000, Rahway, New Jersey 07065, United States
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43
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Datta R, Bose S, Viththlbhai PB, Ghosh S. An expeditious approach to highly functionalized angularly fused 5–5–n ring systems through ring opening–ring closing metathesis of norbornene derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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D’yakonov VA, Trapeznikova OA, de Meijere A, Dzhemilev UM. Metal Complex Catalysis in the Synthesis of Spirocarbocycles. Chem Rev 2014; 114:5775-814. [DOI: 10.1021/cr400291c] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Vladimir A. D’yakonov
- Institute
of Petrochemistry and Catalysis, Russian Academy of Sciences, 141 Prospekt Oktyabrya, Ufa 450075, Russia
| | - Ol’ga A. Trapeznikova
- Institute
of Petrochemistry and Catalysis, Russian Academy of Sciences, 141 Prospekt Oktyabrya, Ufa 450075, Russia
| | - Armin de Meijere
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse
2, 37077 Göttingen, Germany
| | - Usein M. Dzhemilev
- Institute
of Petrochemistry and Catalysis, Russian Academy of Sciences, 141 Prospekt Oktyabrya, Ufa 450075, Russia
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45
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Lam JK, Pham HV, Houk KN, Vanderwal CD. Computation and experiment reveal that the ring-rearrangement metathesis of Himbert cycloadducts can be subject to kinetic or thermodynamic control. J Am Chem Soc 2013; 135:17585-94. [PMID: 24111571 DOI: 10.1021/ja409618p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Unusual observations in the ring-rearrangement metathesis of Himbert arene/allene cycloadducts to form fused polycylic lactams led to a more in-depth experimental study that yielded conflicting results. Differences in reactivity within related systems and unexpected changes in diastereoselectivity among other similar substrates were not readily explained on the basis of the experimental results. Computational investigations demonstrated substrate-dependent changes in reaction pathways (ring-opening metathesis/ring-closing metathesis [ROM/RCM] cascade vs ring-closing metathesis/ring-opening metathesis [RCM/ROM] cascade). Furthermore, some reactions were judged to be under thermodynamic control and others under kinetic control. The greater understanding of the most likely reaction pathways and their energetics provides a reasonable explanation for the previously irreconcilable results.
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Affiliation(s)
- Jonathan K Lam
- 1102 Natural Sciences II, Department of Chemistry, University of California , Irvine, California 92697-2025, United States
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Takao KI, Nanamiya R, Fukushima Y, Namba A, Yoshida K, Tadano KI. Total Synthesis of (+)-Clavilactone A and (−)-Clavilactone B by Ring-Opening/Ring-Closing Metathesis. Org Lett 2013; 15:5582-5. [DOI: 10.1021/ol4027842] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ken-ichi Takao
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ryuki Nanamiya
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yuuki Fukushima
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Ayumi Namba
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Keisuke Yoshida
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kin-ichi Tadano
- Department of Applied Chemistry, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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The regioselective outcome of ring rearrangement metathesis transformations performed on bicyclo[2.2.2]oct-2-ene derivatives. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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Vincent G, Karila D, Khalil G, Sancibrao P, Gori D, Kouklovsky C. Stereodivergent Synthesis of Piperidine Alkaloids by Ring-Rearrangement Metathesis/Reductive Lactam Alkylation of Nitroso Diels-Alder Cycloadducts. Chemistry 2013; 19:9358-65. [DOI: 10.1002/chem.201300836] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Indexed: 11/11/2022]
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49
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Ring rearrangement metathesis of 2-allylbicyclo[2.2.2]octenes: a short entry to cis-hydrindenols from 2-methoxyphenols. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.142] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Schmidt B, Krehl S, Hauke S. Assisted Tandem Catalytic Cross Metathesis–Oxidation: In One Flask from Styrenes to 1,2-Diketones and Further to Quinoxalines. J Org Chem 2013; 78:5427-35. [DOI: 10.1021/jo4005684] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bernd Schmidt
- Universitaet Potsdam, Institut
fuer Chemie (Organische Synthesechemie), Karl-Liebknecht-Strasse 24-25,
D-14476 Potsdam-Golm, Germany
| | - Stefan Krehl
- Universitaet Potsdam, Institut
fuer Chemie (Organische Synthesechemie), Karl-Liebknecht-Strasse 24-25,
D-14476 Potsdam-Golm, Germany
| | - Sylvia Hauke
- Universitaet Potsdam, Institut
fuer Chemie (Organische Synthesechemie), Karl-Liebknecht-Strasse 24-25,
D-14476 Potsdam-Golm, Germany
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