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Le Bras J, Muzart J. Pd-catalyzed reactions of cyclopropanols, cyclobutanols and cyclobutenols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130879] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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2
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Yamamoto K, Kikuchi N, Hamamizu T, Yoshimatsu H, Kuriyama M, Demizu Y, Onomura O. Facile Synthesis of α‐
exo
‐Methylene Ketones from α,α‐Disubstituted Allyl Alcohols by Electrochemical Oxidative Migration. ChemElectroChem 2019. [DOI: 10.1002/celc.201900172] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Kosuke Yamamoto
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Naoto Kikuchi
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Tohru Hamamizu
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Hirofumi Yoshimatsu
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Masami Kuriyama
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Yosuke Demizu
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
| | - Osamu Onomura
- Graduate School of Biomedical SciencesNagasaki University 1-14 Bunkyo-machi, Nagasaki 852-8521 Japan
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3
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Shi L, Yang Z. Exploring the Complexity-Generating Features of the Pauson-Khand Reaction from a Synthetic Perspective. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600123] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Efficient Total Synthesis of Bioactive Natural Products: A Personal Record. CHEM REC 2014; 14:606-22. [DOI: 10.1002/tcr.201402015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 11/07/2022]
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5
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Leemans E, D’hooghe M, De Kimpe N. Ring Expansion of Cyclobutylmethylcarbenium Ions to Cyclopentane or Cyclopentene Derivatives and Metal-Promoted Analogous Rearrangements. Chem Rev 2011; 111:3268-333. [DOI: 10.1021/cr100295j] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erika Leemans
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Matthias D’hooghe
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Norbert De Kimpe
- Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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6
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Tedaldi LM, Baker JR. In situ Reduction in Photocycloadditions: A Method to Prevent Secondary Photoreactions. Org Lett 2009; 11:811-4. [DOI: 10.1021/ol8026494] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lauren M. Tedaldi
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ United Kingdom
| | - James R. Baker
- Department of Chemistry, University College London, 20 Gordon St, London, WC1H 0AJ United Kingdom
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Beccalli EM, Broggini G, Martinelli M, Sottocornola S. C−C, C−O, C−N Bond Formation on sp2 Carbon by Pd(II)-Catalyzed Reactions Involving Oxidant Agents. Chem Rev 2007; 107:5318-65. [PMID: 17973536 DOI: 10.1021/cr068006f] [Citation(s) in RCA: 1051] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Egle M. Beccalli
- Istituto di Chimica Organica “A. Marchesini”, Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy, and Dipartimento di Scienze Chimiche e Ambientali, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Gianluigi Broggini
- Istituto di Chimica Organica “A. Marchesini”, Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy, and Dipartimento di Scienze Chimiche e Ambientali, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Michela Martinelli
- Istituto di Chimica Organica “A. Marchesini”, Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy, and Dipartimento di Scienze Chimiche e Ambientali, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
| | - Silvia Sottocornola
- Istituto di Chimica Organica “A. Marchesini”, Facoltà di Farmacia, Università di Milano, via Venezian 21, 20133 Milano, Italy, and Dipartimento di Scienze Chimiche e Ambientali, Università dell'Insubria, via Valleggio 11, 22100 Como, Italy
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8
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Palladium-catalysed reactions of alcohols. Part D: Rearrangements, carbonylations, carboxylations and miscellaneous reactions. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.103] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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García Martínez A, Teso Vilar E, García Fraile A, de la Moya Cerero S, Lora Maroto B. Palladium(II)-catalyzed ring expansion of a 1-alkenyl cyclopentanol. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.03.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Yoshida M, Sugimoto K, Ihara M. Palladium-Catalyzed Ring Expansion Reaction of (Z)-1-(1,3-Butadienyl)cyclobutanols with Aryl Iodides. Stereospecific Synthesis of (Z)-2-(3-Aryl-1-propenyl)cyclopentanones. Org Lett 2004; 6:1979-82. [PMID: 15176798 DOI: 10.1021/ol049438k] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A novel type of cascade ring expansion process has been developed by the palladium-catalyzed reaction of (Z)-1-(1,3-butadienyl)cyclobutanols with aryl iodides. The reaction proceeds in a stereospecific manner to produce (Z)-2-(3-aryl-1-propenyl)cyclopentanones. It has also been found that regioselective alpha-arylation of alkenyl cyclopentanones proceeds to afford the alpha-arylated cyclopentanones.
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Affiliation(s)
- Masahiro Yoshida
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aobayama, Sendai 980-8578, Japan
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11
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García-Expósito E, Alvarez-Larena A, Branchadell V, Ortuño RM. [2 + 2]-Photocycloaddition of 1,1-Diethoxyethylene to Chiral Polyfunctional 2-Cyclohexenones. Regioselectivity and π-Facial Discrimination. J Org Chem 2004; 69:1120-5. [PMID: 14961660 DOI: 10.1021/jo035532n] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photochemical [2 + 2]-cycloadditions of 1,1-diethoxyethylene to chiral polyfunctional 2-cyclohexenones have been carried out leading to the production of highly constrained unusual alpha-amino acids with excellent regioselectivity and satisfactory yields. Theoretical calculations have been done to rationalize the observed regio- and diastereoselectivity and show that regiochemistry is determined by the relative rate of formation of the 1,4-biradical intermediates and not by the stability of these species.
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12
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Yoshida M, Sugimoto K, Ihara M. Stereoselective synthesis of α-disubstituted cyclopentanones by palladium-catalyzed rearrangement of allenylcyclobutanols with aryl halides. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00910-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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García-Expósito E, Bearpark MJ, Ortuño RM, Robb MA, Branchadell V. Theoretical study of the photochemical [2 + 2]-cycloadditions of cyclic and acyclic alpha,beta-unsaturated carbonyl compounds to ethylene. J Org Chem 2002; 67:6070-7. [PMID: 12182644 DOI: 10.1021/jo026047f] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ground and first triplet excited-state potential energy surfaces of the [2 + 2]-cycloadditions of 2-cyclohexenone, methyl acrylate, and methyl crotonate to ethylene have been studied by means of CASSCF and DFT-B3LYP calculations. The attack of ethylene to the (3)(pi-pi) alpha,beta-unsaturated carbonyl compound leads to the formation of a triplet 1,4-biradical intermediate that evolves to the ground-state potential energy surface. The outcome of the reaction is governed by the competition between the deactivation of the (3)(pi-pi) alpha,beta-unsaturated carbonyl compound itself and its reaction with ethylene to form the triplet 1,4-biradical. For 2-cyclohexenone, the potential energy barrier corresponding to the formation of the biradical intermediate is lower than for the acyclic systems. On the other hand, the energy necessary to reach the crossing point between the (3)(pi-pi) and the ground-state potential energy surfaces is lower for the acyclic systems than for 2-cyclohexenone. For methyl acrylate and methyl crotonate, the decay of the (3)(pi-pi) state of the isolated molecule is therefore expected to be faster than the formation of the 1,4-biradical, so that the [2 + 2]-cycloaddition will not take place. However, for 2-cyclohexenone the formation of the triplet 1,4-biradical is favorable, and the process will lead to the formation of the corresponding cyclobutane derivative.
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Affiliation(s)
- Elena García-Expósito
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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14
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Larock RC, Reddy CK. Synthesis of 2-alkylidenecyclopentanones via palladium-catalyzed carbopalladation/ring expansion of 1-(1-alkynyl)cyclobutanols. J Org Chem 2002; 67:2027-33. [PMID: 11925206 DOI: 10.1021/jo010577e] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The palladium-catalyzed cross-coupling of aryl halides or vinylic halides or triflates and 1-(1-alkynyl)cyclobutanols affords good yields of stereoisomerically pure 2-arylidene- or 2-(2-alkenylidene)cyclopentanones, respectively. The process involves (1) oxidative addition of the organic halide or triflate to Pd(0), (2) regioselective, intermolecular carbopalladation of the carbon-carbon triple bond of the 1-(1-alkynyl)cyclobutanol to produce a vinylic palladium intermediate, (3) regioselective ring expansion to a palladacycle, and (4) reductive elimination of the 2-alkylidenecyclopentanone with simultaneous regeneration of the Pd(0) catalyst. Generally, the best results are obtained by employing 10 mol % of Pd(OAc)(2), 20 mol % of PPh(3), 2 equiv of the aryl or vinylic iodide or vinylic triflate, 2 equiv of diisopropylethylamine, and n-Bu(4)NCl in DMF as the solvent.
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Affiliation(s)
- Richard C Larock
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA.
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Nagao Y, Ueki A, Asano K, Tanaka S, Sano S, Shiro M. Facile palladium(0)-catalyzed ring expansion reactions of hydroxy methoxyallenyl cyclic compounds via hydropalladation. Org Lett 2002; 4:455-7. [PMID: 11820903 DOI: 10.1021/ol010287k] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium(0)-catalyzed one-atom ring expansion of various hydroxy methoxyallenyl compounds has been achieved in excellent yields without the use of aryl halides. Hydroxy methoxyallenylisoindolinones, -indanones, and -phthalans have been readily converted to the corresponding isoquinolones, naphthoquinones, and isochromanones in the presence of P(o-tolyl)(3).
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Affiliation(s)
- Yoshimitsu Nagao
- Faculty of Pharmaceutical Sciences, The University of Tokushima, Sho-machi, Tokushima 770-8505, Japan.
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17
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Synthesis of 2-alkylidenecyclopentanones via palladium-catalyzed cross-coupling of 1-(1-Alkynyl)cyclobutanols and aryl or vinylic halides. Org Lett 2000; 2:3325-7. [PMID: 11029201 DOI: 10.1021/ol000219i] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The palladium-catalyzed cross-coupling of aryl or vinylic halides and 1-(1-alkynyl)cyclobutanols affords good yields of stereoisomerically pure 2-arylidene- or 2-(2-alkenylidene)cyclopentanones, respectively, by a process involving (1) oxidative addition of the organic iodide to Pd(0), (2) carbopalladation of the triple bond of the 1-(1-alkynyl)cyclobutanol, (3) regio- and stereoselective ring expansion to form a novel palladiacycle, and (4) reductive elimination to the 2-alkylidenecyclopentanone with simultaneous regeneration of the Pd(0) catalyst.
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Kocovský P, Dunn V, Gogoll A, Langer V. An Approach toward the Triquinane-Type Skeleton via Reagent-Controlled Skeletal Rearrangements. A Facile Method for Protection-Deprotection of Organomercurials, Tuning the Selectivity of Wagner-Meerwein Migrations, and a New Route to Annulated Lactones. J Org Chem 1999; 64:101-119. [PMID: 11674091 DOI: 10.1021/jo9812882] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nonlinear triquinane-type building blocks have been synthesized using three strategic steps, namely, (1) Hg(2+)-mediated opening of a cyclopropane ring involving a skeletal rearrangement (3 --> 8), (2) an intramolecular organometallic addition across a C=O bond triggered by activation of the C-HgX group by means of Me(3)CuLi(2) (14 --> 26), and (3) selective, reagent-controlled skeletal rearrangements (43 --> 47 with Tl(3+) or Hg(2+); 43 --> 51 + 52 with Pd(2+); 44 --> 47 with Pd(2+)). A new method for protection/deprotection of organomercurials has been developed, which allows selective reduction of a carbonyl group with NaBH(4) and other hydrides (8 --> 14 --> 16 --> 20) and Tebbe methylenation (14 --> 31 --> 32). Oxidative demercuration (8 --> 11 + 28) and Pd(2+)-catalyzed carbonylation of organomercurials (20 --> 53) allowed syntheses of gamma- and delta-lactones.
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Affiliation(s)
- Pavel Kocovský
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, U.K., Department of Organic Chemistry, University of Uppsala, Box 531, S-75121 Uppsala, Sweden, and Department of Inorganic Chemistry, Chalmers University of Technology and University of Göteborg, S-41296 Göteborg, Sweden
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Rosenstock B, Gais HJ, Herrmann E, Raabe G, Binger P, Freund A, Wedemann P, Krüger C, Lindner J. Formal Asymmetric Synthesis of Pentalenolactone E and Pentalenolactone F-1. Retrosynthesis and π-Facial Differentiation in Palladium-Catalyzed and Dipolar [3 + 2]-Cycloaddition Reactions of Bicyclic Alkenes: Evidence for Electrostatic Control of Stereoselectivity. European J Org Chem 1998. [DOI: 10.1002/(sici)1099-0690(199802)1998:2<257::aid-ejoc257>3.0.co;2-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Affiliation(s)
- Goverdhan Mehta
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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Bach T. Regioselective ring opening of oxetanes by hydrogenolysis. – A convenient method for the carbohydroxylation of enol ethers. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.1995199506148] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Tandem ring expansion and insertion reaction of alkenic cyclobutanols mediated by palladium—A novel approach to bicyclo[4.3.O]nonane systems. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)89579-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Hwu JR, Gilbert BA, Lin LC, Liaw BR. Silicon-directed Norrish type I cleavage of β-trimethylsilyl cycloalkanones. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/c39900000161] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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