1
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Kong D, Wu H, Ge J, Shen Z, Huang G. Mechanism and Origins of Enantioselectivity of Cobalt-Catalyzed Intermolecular Hydroarylation/Cyclization of 1,6-Enynes with N-Pyridylindoles. J Org Chem 2022; 87:6438-6443. [PMID: 35405065 DOI: 10.1021/acs.joc.2c00305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Density functional theory calculations were performed to investigate the cobalt-catalyzed intermolecular hydroarylation/cyclization of 1,6-enynes with N-pyridylindoles. The computations reveal that the reaction begins with the oxidative cyclization of 1,6-enyne to afford the five-membered cobaltacycle, from which the metal-assisted σ-bond metathesis/C-C reductive elimination led to the final hydroarylation/cyclization product. The initial oxidative cyclization constitutes the rate-determining step of the overall reaction. The steric repulsion and π···π interaction were found to play a crucial role in dictating the experimentally observed enantioselectivity.
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Affiliation(s)
- Deping Kong
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, P.R. China
| | - Hongli Wu
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, P.R. China
| | - Jiaao Ge
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, P.R. China
| | - Zhen Shen
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, P.R. China
| | - Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, P.R. China
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2
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Farmer ME, Ehehalt LE, Pabst TP, Tudge MT, Chirik PJ. Well-Defined Cationic Cobalt(I) Precatalyst for Olefin-Alkyne [2 + 2] Cycloaddition and Olefin-Diene Hydrovinylation Reactions: Experimental Evidence for Metallacycle Intermediates. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00473] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marcus E. Farmer
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
- GlaxoSmithKline Medicinal Chemistry, 1250 South Collegeville Road, P.O. Box 5089, Collegeville, Pennsylvania 19426, United States
| | - Lauren E. Ehehalt
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Tyler P. Pabst
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Matthew T. Tudge
- GlaxoSmithKline Medicinal Chemistry, 1250 South Collegeville Road, P.O. Box 5089, Collegeville, Pennsylvania 19426, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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3
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Nandy S, Paul S, Das KK, Kumar P, Ghorai D, Panda S. Synthesis and reactivity of alkynyl boron compounds. Org Biomol Chem 2021; 19:7276-7297. [PMID: 34374405 DOI: 10.1039/d1ob00465d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Over the last century, there have been considerable developments in organoboron chemistry due to the stability, non-toxicity, and easy commercial availability of various boronic esters. Several organoboron reagents have emerged and play an increasingly important role in everyday organic synthesis. Among them, alkynyl boron compounds have attracted significant attention due to their easy synthesis and diverse reactivity. In this review, we summarize the advancement of research on alkynyl boron compounds, highlighting their importance in the synthesis of valuable compounds.
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Affiliation(s)
- Soumilee Nandy
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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4
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Zhong H, Beromi MM, Chirik PJ. Ligand Substitution and Electronic Structure Studies of Bis(phosphine)Cobalt Cyclooctadiene Precatalysts for Alkene Hydrogenation. CAN J CHEM 2021; 99:193-201. [PMID: 34334799 DOI: 10.1139/cjc-2020-0352] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Diene self-exchange reactions of the 17-electron, formally cobalt(0) cyclooctadienyl precatalyst, (R,R)-(iPrDuPhos)Co(COD) (P 2 CoCOD, (R,R)-iPrDuPhos = 1,2-bis((2R,5R)-2,5-diisopropylphospholano)benzene, COD = 1,5-cyclooctadiene) were studied using natural abundance and deuterated 1,5-cyclooctadiene. Exchange of free and coordinated diene was observed at ambient temperature in benzene-d 6 solution and kinetic studies support a dissociative process. Both neutral P 2 CoCOD and the 16-electron, cationic cobalt(I) complex, [(R,R)-(iPrDuPhos)Co(COD)][BArF 4] (BArF 4 = B[(3,5-(CF3)2)C6H3]4) underwent instantaneous displacement of the 1,5-cyclooctadiene ligand by carbon monoxide and generated the corresponding carbonyl derivatives. The solid-state parameters, DFT-computed Mulliken spin density and analysis of molecular orbitals suggest an alternative description of P 2 CoCOD as low-spin cobalt(II) with the 1,5-cyclooctadiene acting as a LX2-type ligand. This view of the electronic structure provides insight into the nature of the ligand substitution processes and the remarkable stability of the neutral cobalt complexes toward protic solvents observed during catalytic alkene hydrogenation.
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Affiliation(s)
- Hongyu Zhong
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Megan Mohadjer Beromi
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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5
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Abstract
Catalysts applied in cobalt-catalyzed cyclotrimerizations reactions in general rely on the use of Co(I) precatalysts or the in situ generation of Co(I) catalysts from Co(II) sources by reduction in the presence of steering ligands, often by addition of less noble metals. In this paper, we report the synthesis and properties of novel stable CpCo(III) complexes as precatalysts and their exemplary evaluation for application in catalytic [2+2+2] cycloadditions. The role of phosphite neutral ligands, as well as iodide and cyanide as anionic ligands, on the reactivity of the complexes was evaluated. A modified one-pot approach to the synthesis of Cp ring-functionalized Cp’Co(III) complexes was developed. The investigations demonstrated that CpCo(III) complexes can be directly applied as catalysts in catalytic cyclotrimerizations of triynes without reducing agents as additives.
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6
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Charpentier J, Voirol F, Flachsmann F, Tanner S, Aeberli N, Brunner G, Goeke A. Synthesis of 1,4‐Cyclohexadiene Carboxylates through a Formal [2+4]‐Cycloaddition of Propiolates under Cobalt Catalysis. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Julie Charpentier
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Francis Voirol
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Felix Flachsmann
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Silvia Tanner
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Natalie Aeberli
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Gerhard Brunner
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
| | - Andreas Goeke
- Givaudan Schweiz AG Fragrances S&T Ingredients Research Kemptpark 50 CH-8310 Kemptthal Switzerland
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7
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Whyte A, Bajohr J, Torelli A, Lautens M. Enantioselective Cobalt-Catalyzed Intermolecular Hydroacylation of 1,6-Enynes. Angew Chem Int Ed Engl 2020; 59:16409-16413. [PMID: 32524694 DOI: 10.1002/anie.202006716] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/02/2020] [Indexed: 12/20/2022]
Abstract
We report a cobalt-catalyzed hydroacylation of 1,6-enynes with exogenous aldehydes in a domino sequence to construct enantioenriched ketones. The products were obtained in good yields with excellent regio-, diastereo-, and enantioselectivity. Furthermore, the chiral products served as valuable precursors to access complex spirocyclic scaffolds with three contiguous stereocenters. The asymmetric hydroacylation process exhibited no C-H crossover and no KIE, thus indicating that the C-H bond cleavage was not involved in the turnover-limiting step.
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Affiliation(s)
- Andrew Whyte
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Jonathan Bajohr
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Alexa Torelli
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
| | - Mark Lautens
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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8
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Whyte A, Bajohr J, Torelli A, Lautens M. Enantioselective Cobalt‐Catalyzed Intermolecular Hydroacylation of 1,6‐Enynes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrew Whyte
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Jonathan Bajohr
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Alexa Torelli
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Mark Lautens
- Department of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
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9
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Whyte A, Torelli A, Mirabi B, Prieto L, Rodríguez JF, Lautens M. Cobalt-Catalyzed Enantioselective Hydroarylation of 1,6-Enynes. J Am Chem Soc 2020; 142:9510-9517. [PMID: 32337994 DOI: 10.1021/jacs.0c03246] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An asymmetric hydroarylative cyclization of enynes involving a C-H bond cleavage is reported. The cobalt-catalyzed cascade generates three new bonds in an atom-economical fashion. The products were obtained in excellent yields and excellent enantioselectivities as single diastereo- and regioisomers. Preliminary mechanistic studies indicate that the reaction shows no intermolecular C-H crossover. This work highlights the potential of cobalt catalysis in C-H bond functionalization and enantioselective domino reactivity.
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Affiliation(s)
- Andrew Whyte
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Alexa Torelli
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Bijan Mirabi
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Liher Prieto
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.,Department of Organic Chemistry II, University of the Basque Country (UPV/EHU), 48080 Bilbao, Spain
| | - José F Rodríguez
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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10
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Gray M, Hines MT, Parsutkar MM, Wahlstrom AJ, Brunelli NA, RajanBabu TV. Mechanism of Cobalt-Catalyzed Heterodimerization of Acrylates and 1,3-Dienes. A Potential Role of Cationic Cobalt(I) Intermediates. ACS Catal 2020; 10:4337-4348. [PMID: 32457820 PMCID: PMC7250405 DOI: 10.1021/acscatal.9b05455] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Coupling reactions of feedstock alkenes are promising, but few of these reactions are practiced industrially. Even though recent advances in the synthetic methodology have led to excellent regio- and enantioselectivies in the dimerization reactions between 1,3-dienes and acrylates, the efficiency as measured by the turnover numbers (TON) in the catalyst has remained modest. Through a combination of reaction progress kinetic analysis (RPKA) of a prototypical dimerization reaction, characterization of isolated low-valent cobalt catalyst precursors involved, several important details of the mechanism of this reaction have emerged. (i) The prototypical reaction has an induction period that requires at least two hours of stir time to generate the competent catalyst. (ii) Reduction of a Co(II) complex to a Co(I) complex, and subsequent generation of a cationic [Co(I)]+ species are responsible for this delay. (iii) Through RPKA using in situ IR spectroscopy, same excess experiments reveal inhibition by the product towards the end of the reaction and no catalyst deactivation is observed as long as diene is present in the medium. The low TON observed is most likely the result of the inherent instability of the putative cationic Co(I)-species that catalyzes the reaction. (iv) Different excess experiments suggest that the reaction is first order in the diene and zero order in the acrylate. (v) Catalyst loading experiments show that the catalyst is first order. The orders in the various regents were further confirmed by Variable Time Normalization Analysis (VTNA). (vi) A mechanism based on oxidative dimerization [via Co(I)/Co(III)-cycle] is proposed. Based on the results of this study, it is possible to increase the TON by a factor of 10 by conducting the reaction at an increased concentration of the starting materials, especially, the diene, which seems to stabilize the catalytic species.
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Affiliation(s)
- Montgomery Gray
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Michael T Hines
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Mahesh M Parsutkar
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - A J Wahlstrom
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - Nicholas A Brunelli
- The Ohio State University, William G. Lowrie Department of Chemical and Biomolecular Engineering, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
| | - T V RajanBabu
- 151 W. Woodruff, Columbus, OH 43210 and the Department of Chemistry and Biochemistry, 100 W. 18th Avenue, Columbus, Ohio 43210, United States
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11
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Méndez-Gálvez C, Böhme M, Leino R, Savela R. Synthesis of Isobenzofuranones by Cobalt Catalyzed [2+2+2] Cycloaddition. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Carolina Méndez-Gálvez
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
| | - Matthias Böhme
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
| | - Reko Leino
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
| | - Risto Savela
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
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12
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González MJ, Breit B. Visible-Light-Driven Intermolecular Reductive Ene-Yne Coupling by Iridium/Cobalt Dual Catalysis for C(sp 3 )-C(sp 2 ) Bond Formation. Chemistry 2019; 25:15746-15750. [PMID: 31549749 PMCID: PMC6916364 DOI: 10.1002/chem.201903708] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/19/2019] [Indexed: 02/02/2023]
Abstract
A new methodology to form C(sp3 )-C(sp2 ) bonds by visible-light-driven intermolecular reductive ene-yne coupling has been successfully developed. The process relies on the ability of the Hantzsch ester to contribute in both SET and HAT processes through a unified cobalt and iridium catalytic system. This procedure avoids the use of stoichiometric amounts of reducing metallic reagents, which is translated into high functional-group tolerance and atom economy.
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Affiliation(s)
- María J. González
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104FreiburgGermany
| | - Bernhard Breit
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104FreiburgGermany
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13
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Esch P, Fischer M, Heiles S, Schäfer M. Olefinic reagents tested for peptide derivatization with switchable properties: Stable upon collision induced dissociation and cleavable by in-source Paternò-Büchi reactions. JOURNAL OF MASS SPECTROMETRY : JMS 2019; 54:976-986. [PMID: 31729095 DOI: 10.1002/jms.4474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/01/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
This contribution is part of our ongoing efforts to develop innovative cross-linking (XL) reagents and protocols for facilitated peptide mixture analysis and efficient assignment of cross-linked peptide products. In this report, we combine in-source Paternò-Büchi (PB) photo-chemistry with a tandem mass spectrometry approach to selectively address the fragmentation of a tailor-made cross-linking reagent. The PB photochemistry, so far exclusively used for the identification of unsaturation sites in lipids and in lipidomics, is now introduced to the field of chemical cross-linking. Based on trans-3-hexenedioic acid, an olefinic homo bifunctional amine reactive XL reagent was designed and synthesized for this proof-of-principle study. Condensation products of the olefinic reagent with a set of exemplary peptides are used to test the feasibility of the concept. Benzophenone is photochemically reacted in the nano-electrospray ion source and forms oxetane PB reaction products. Subsequent CID-MS triggered retro-PB reaction of the respective isobaric oxetane molecular ions and delivers reliably and predictably two sets of characteristic fragment ions of the cross-linker. Based on these signature ion sets, a straightforward identification of covalently interconnected peptides in complex digests is proposed. Furthermore, CID-MSn experiments of the retro-PB reaction products deliver peptide backbone characteristic fragment ions. Additionally, the olefinic XL reagents exhibit a pronounced robustness upon CID-activation, without previous UV-excitation. These experiments document that a complete backbone fragmentation is possible, while the linker-moiety remains intact. This feature renders the new olefinic linkers switchable between a stable, noncleavable cross-linking mode and an in-source PB cleavable mode.
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Affiliation(s)
- Patrick Esch
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich Buff Ring 17, D-35392 Giessen, Germany
| | - Moritz Fischer
- Department of Chemistry, Institute of Organic Chemistry, University of Cologne, Greinstraße 4, D-50939, Cologne, Germany
| | - Sven Heiles
- Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich Buff Ring 17, D-35392 Giessen, Germany
| | - Mathias Schäfer
- Department of Chemistry, Institute of Organic Chemistry, University of Cologne, Greinstraße 4, D-50939, Cologne, Germany
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14
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Loup J, Dhawa U, Pesciaioli F, Wencel‐Delord J, Ackermann L. Enantioselective C−H Activation with Earth‐Abundant 3d Transition Metals. Angew Chem Int Ed Engl 2019; 58:12803-12818. [DOI: 10.1002/anie.201904214] [Citation(s) in RCA: 227] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Joachim Loup
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Germany
| | - Uttam Dhawa
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Germany
| | - Fabio Pesciaioli
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Germany
| | - Joanna Wencel‐Delord
- Laboratoire d'Innovation Moléculaire et Applications (UMR CNRS 7042) Université de Strasbourg/Université de Haute Alsace, ECPM 25 Rue Becquerel 67087 Strasbourg France
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Germany
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15
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Loup J, Dhawa U, Pesciaioli F, Wencel‐Delord J, Ackermann L. Enantioselektive C‐H‐Aktivierung mit natürlich vorkommenden 3d‐Übergangsmetallen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904214] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Joachim Loup
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Uttam Dhawa
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Fabio Pesciaioli
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
| | - Joanna Wencel‐Delord
- Laboratoire d'Innovation Moléculaire et Applications (UMR CNRS 7042) Université de Strasbourg/Université de Haute Alsace, ECPM 25 Rue Becquerel 67087 Strasbourg Frankreich
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Deutschland
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16
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Syntheses and Catalytic Hydrogenation Performance of Cationic Bis(phosphine) Cobalt(I) Diene and Arene Compounds. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903766] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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17
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Zhong H, Friedfeld MR, Chirik PJ. Syntheses and Catalytic Hydrogenation Performance of Cationic Bis(phosphine) Cobalt(I) Diene and Arene Compounds. Angew Chem Int Ed Engl 2019; 58:9194-9198. [DOI: 10.1002/anie.201903766] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Hongyu Zhong
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Max R. Friedfeld
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
| | - Paul J. Chirik
- Department of Chemistry Princeton University Frick Laboratory 292 Princeton NJ 08544 USA
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18
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Kreyenschmidt F, Meurer SE, Koszinowski K. Mechanisms of Cobalt/Phosphine-Catalyzed Cross-Coupling Reactions. Chemistry 2019; 25:5912-5921. [PMID: 30734379 DOI: 10.1002/chem.201805964] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Indexed: 01/09/2023]
Abstract
>The combination of CoCl2 with bidentate phosphines is known to catalyze challenging cross-coupling and Heck-type reactions, but the mechanisms of these valuable transformations have not been established. Here, we use electrospray-ionization mass spectrometry to intercept the species formed in these reactions. Our results indicate that a sequence of transmetalation, reductive elimination, and redox disproportionation convert the cobalt(II) precatalyst into low-valent cobalt complexes. These species readily transfer single electrons to alkyl bromides, which thereupon dissociate into alkyl radicals and Br- . In cross-coupling reactions, the alkyl radicals add to the cobalt catalyst to form observable heteroleptic complexes, which release the coupling products through reductive eliminations. In the Heck-type reactions, the low abundance of newly formed ionic species renders the analysis more difficult. Nonetheless, our results also point to the occurrence of single-electron transfer processes and the involvement of radicals in these transformations.
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Affiliation(s)
- Friedrich Kreyenschmidt
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Selim E Meurer
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
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19
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Yang J, Shen Y, Lim YJ, Yoshikai N. Divergent ring-opening coupling between cyclopropanols and alkynes under cobalt catalysis. Chem Sci 2018; 9:6928-6934. [PMID: 30210767 PMCID: PMC6124909 DOI: 10.1039/c8sc02074d] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 07/13/2018] [Indexed: 12/04/2022] Open
Abstract
Cobalt catalysts promote ring-opening coupling between cyclopropanols and unactivated alkynes to give β-alkenyl ketones or cyclopentenols with exquisite chemoselectivity control.
Cobalt–diphosphine catalysts promote ring-opening coupling reactions between cyclopropanols and unactivated internal alkynes, affording either β-alkenyl ketones or multisubstituted cyclopentenol derivatives in good yields with good to excellent regioselectivities. The chemoselectivity between these β-alkenylation and [3 + 2] annulation reactions, which likely share a cobalt homoenolate as a key catalytic intermediate, is exquisitely controlled by the reaction conditions, with the solvent being a major controlling factor. The reactions are proposed to involve ring opening of cobalt cyclopropoxide into homoenolate, migratory insertion of the alkyne into the Co–C bond, and protodemetalation or intramolecular carbonyl addition of the resulting alkenylcobalt species. The feasibility of these reaction steps was supported by DFT calculations.
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Affiliation(s)
- Junfeng Yang
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
| | - Yixiao Shen
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
| | - Yang Jie Lim
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
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20
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Fischer F, Hapke M. Air-Stable CpCo I-Phosphite-Fumarate Precatalyst in Cyclization Reactions: Comparing Different Methods of Energy Supply. European J Org Chem 2018; 2018:3193-3201. [PMID: 30344447 PMCID: PMC6175375 DOI: 10.1002/ejoc.201800196] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Indexed: 11/11/2022]
Abstract
The robust CoI precatalyst [CpCo(P{OEt}3)(trans-MeO2CHC=CHCO2Me)] was investigated in cyclotrimerizations, furnishing benzenes and pyridines from triynes, diynes and nitriles, comparing the influence of different ways of energy supply; namely, irradiation and conventional (thermal) or microwave heating. The precatalyst was found to work under all conditions, including the possibility to catalyze cyclotrimerizations at room temperature under photochemical conditions at longer reaction times. Performance of the reactions in a microwave reactor proved to be the most time-efficient way to rapidly assemble the expected reaction products; however, careful selection of reaction conditions can be required. The synthesis of pyridines and isoquinolines successfully involved the utilization of versatile functionalized nitriles, affording structurally interesting reaction products. Comparison with the known and often applied precatalyst CpCo(CO)2 demonstrated the significantly higher reactivity of the CpCoI-phosphite-olefin precatalyst.
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Affiliation(s)
- Fabian Fischer
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock (LIKAT)Albert‐Einstein‐Strasse 29a18059RostockGermany
| | - Marko Hapke
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock (LIKAT)Albert‐Einstein‐Strasse 29a18059RostockGermany
- Institut für Katalyse (INCA)Johannes Kepler Universität LinzAltenberger Strasse 694040LinzAustria
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21
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Wu C, Yoshikai N. Cobalt‐Catalyzed Intramolecular Reactions between a Vinylcyclopropane and an Alkyne: Switchable [5+2] Cycloaddition and Homo‐Ene Pathways. Angew Chem Int Ed Engl 2018; 57:6558-6562. [DOI: 10.1002/anie.201803162] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Indexed: 02/03/2023]
Affiliation(s)
- Chunlin Wu
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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22
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Greisch JF, Weis P, Brendle K, Kappes MM, Haler JRN, Far J, De Pauw E, Albers C, Bay S, Wurm T, Rudolph M, Schulmeister J, Hashmi ASK. Detection of Intermediates in Dual Gold Catalysis Using High-Resolution Ion Mobility Mass Spectrometry. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00128] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jean-François Greisch
- Institute of Physical Chemistry, KIT, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology, KIT, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Patrick Weis
- Institute of Physical Chemistry, KIT, D-76131 Karlsruhe, Germany
| | - Katrina Brendle
- Institute of Physical Chemistry, KIT, D-76131 Karlsruhe, Germany
| | - Manfred M. Kappes
- Institute of Physical Chemistry, KIT, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology, KIT, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Jean R. N. Haler
- Mass Spectrometry Laboratory, University of Liège, MolSys Research Unit, B-4000 Liège, Belgium
| | - Johann Far
- Mass Spectrometry Laboratory, University of Liège, MolSys Research Unit, B-4000 Liège, Belgium
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, University of Liège, MolSys Research Unit, B-4000 Liège, Belgium
| | | | - Sarah Bay
- Organic Chemistry Institute, Heidelberg University, D-69120 Heidelberg, Germany
| | - Thomas Wurm
- Organic Chemistry Institute, Heidelberg University, D-69120 Heidelberg, Germany
| | - Matthias Rudolph
- Organic Chemistry Institute, Heidelberg University, D-69120 Heidelberg, Germany
| | - Jürgen Schulmeister
- Organic Chemistry Institute, Heidelberg University, D-69120 Heidelberg, Germany
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23
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Wu C, Yoshikai N. Cobalt‐Catalyzed Intramolecular Reactions between a Vinylcyclopropane and an Alkyne: Switchable [5+2] Cycloaddition and Homo‐Ene Pathways. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803162] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunlin Wu
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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24
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Thullen SM, Rovis T. A Mild Hydroaminoalkylation of Conjugated Dienes Using a Unified Cobalt and Photoredox Catalytic System. J Am Chem Soc 2017; 139:15504-15508. [PMID: 29048886 DOI: 10.1021/jacs.7b09252] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Metallo-photoredox catalysis has redefined the available bond disconnections in the synthetic arsenal. By harnessing the one-electron chemistry of photoredox catalysis in tandem with low-valent cobalt catalysts, new methods by which functionalities may be stitched together become available. Herein we describe the coupling of photoredox-generated α-amino radical species with conjugated dienes using a unified cobalt and iridium catalytic system in order to access a variety of useful homoallylic amines from simple commercially available starting materials. We present a series of mechanistic experiments that support the intervention of Co-hydride intermediates that undergo diene insertion to generate Co-π-allyl species.
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Affiliation(s)
- Scott M Thullen
- Department of Chemistry, Columbia University , New York, New York 10027, United States.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Tomislav Rovis
- Department of Chemistry, Columbia University , New York, New York 10027, United States.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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25
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Suleymanov AA, Vasilyev DV, Novikov VV, Nelyubina YV, Perekalin DS. Unpredictable cycloisomerization of 1,11-dien-6-ynes by a common cobalt catalyst. Beilstein J Org Chem 2017; 13:639-643. [PMID: 28487757 PMCID: PMC5389203 DOI: 10.3762/bjoc.13.62] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 03/15/2017] [Indexed: 12/24/2022] Open
Abstract
1,11-Dien-6-ynes undergo cycloisomerization in the presence of the cobalt catalytic system CoBr2/phosphine ligand/Zn/ZnI2 giving cyclohexene, diene or cyclopropane structures depending on the type of the phosphine ligand. This unpredictable behaviour suggests that, although the availability of the cobalt catalytic system is appealing, the development of well-defined catalysts is desirable for further progress.
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Affiliation(s)
- Abdusalom A Suleymanov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow, Russian Federation
| | - Dmitry V Vasilyev
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow, Russian Federation
| | - Valentin V Novikov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow, Russian Federation
| | - Yulia V Nelyubina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow, Russian Federation
| | - Dmitry S Perekalin
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow, Russian Federation
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26
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Schäfer M, Peckelsen K, Paul M, Martens J, Oomens J, Berden G, Berkessel A, Meijer AJHM. Hydrogen Tunneling above Room Temperature Evidenced by Infrared Ion Spectroscopy. J Am Chem Soc 2017; 139:5779-5786. [PMID: 28282985 DOI: 10.1021/jacs.6b10348] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
While hydrogen tunneling at elevated temperatures has, for instance, often been postulated in biochemical processes, spectroscopic proof is thus far limited to cryogenic conditions, under which thermal reactivity is negligible. We report spectroscopic evidence for H-tunneling in the gas phase at temperatures around 320-350 K observed in the isomerization reaction of a hydroxycarbene into an aldehyde. The charge-tagged carbene was generated in situ in a tandem mass spectrometer by decarboxylation of oxo[4-(trimethylammonio)phenyl]acetic acid upon collision induced dissociation. All ion structures involved are characterized by infrared ion spectroscopy and quantum chemical calculations. The charge-tagged phenylhydroxycarbene undergoes a 1,2-H-shift to the corresponding aldehyde with an half-life of about 10 s, evidenced by isomer-selective two-color (IR-IR) spectroscopy. In contrast, the deuterated (OD) carbene analogue showed much reduced 1,2-D-shift reactivity with an estimated half-life of at least 200 s under the experimental conditions, and provides clear evidence for hydrogen atom tunneling in the H-isotopologue. This is the first spectroscopic confirmation of hydrogen atom tunneling governing 1,2-H-shift reactions at noncryogenic temperatures, which is of broad significance for a range of (bio)chemical processes, including enzymatic transformations and organocatalysis.
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Affiliation(s)
- Mathias Schäfer
- Department of Chemistry, Organic Chemistry, University of Cologne , Greinstraße 4, 50939 Cologne, Germany
| | - Katrin Peckelsen
- Department of Chemistry, Organic Chemistry, University of Cologne , Greinstraße 4, 50939 Cologne, Germany
| | - Mathias Paul
- Department of Chemistry, Organic Chemistry, University of Cologne , Greinstraße 4, 50939 Cologne, Germany
| | - Jonathan Martens
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands.,Van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Giel Berden
- Radboud University , Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525 ED Nijmegen, The Netherlands
| | - Albrecht Berkessel
- Department of Chemistry, Organic Chemistry, University of Cologne , Greinstraße 4, 50939 Cologne, Germany
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27
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Chirik PJ. Carbon-Carbon Bond Formation in a Weak Ligand Field: Leveraging Open-Shell First-Row Transition-Metal Catalysts. Angew Chem Int Ed Engl 2017; 56:5170-5181. [DOI: 10.1002/anie.201611959] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Paul J. Chirik
- Department of Chemistry; Princeton University; Princeton NJ 08544 USA
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28
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Chirik PJ. Kohlenstoff-Kohlenstoff-Bindungsbildung in einem schwachen Ligandenfeld: Nutzung von Open-Shell-Übergangsmetallkatalysatoren der ersten Übergangsperiode. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611959] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Paul J. Chirik
- Department of Chemistry; Princeton University; Princeton NJ 08544 USA
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29
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Yang J, Rérat A, Lim YJ, Gosmini C, Yoshikai N. Cobalt-Catalyzed Enantio- and Diastereoselective Intramolecular Hydroacylation of Trisubstituted Alkenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611518] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Junfeng Yang
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Alice Rérat
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
- Laboratoire de Chimie Moléculaire; CNRS; Ecole Polytechnique; Université Paris Saclay; 91128 Palaiseau France
| | - Yang Jie Lim
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Corinne Gosmini
- Laboratoire de Chimie Moléculaire; CNRS; Ecole Polytechnique; Université Paris Saclay; 91128 Palaiseau France
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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30
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Yang J, Rérat A, Lim YJ, Gosmini C, Yoshikai N. Cobalt-Catalyzed Enantio- and Diastereoselective Intramolecular Hydroacylation of Trisubstituted Alkenes. Angew Chem Int Ed Engl 2017; 56:2449-2453. [DOI: 10.1002/anie.201611518] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 12/22/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Junfeng Yang
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Alice Rérat
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
- Laboratoire de Chimie Moléculaire; CNRS; Ecole Polytechnique; Université Paris Saclay; 91128 Palaiseau France
| | - Yang Jie Lim
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Corinne Gosmini
- Laboratoire de Chimie Moléculaire; CNRS; Ecole Polytechnique; Université Paris Saclay; 91128 Palaiseau France
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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31
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Xu W, Pek JH, Yoshikai N. Cobalt-Catalyzed, Imine-Directed Olefin Hydroarylation under Grignard-Free Conditions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600403] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wengang Xu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jie Hui Pek
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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32
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Jungk P, Fischer F, Hapke M. In Situ-Generated Chiral Co(I)-Catalyst for Asymmetric [2+2+2] Cycloadditions of Triynes. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00560] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phillip Jungk
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
| | - Fabian Fischer
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
| | - Marko Hapke
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
- Johannes Kepler Universität Linz, Institut
für Katalyse, Altenberger
Strasse 69, A-4040 Linz, Austria
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33
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Meng Q, Wang F. Mechanisms and reactivity differences for the cobalt-catalyzed enantioselective intramolecular hydroacylation of ketones and alkenes: insights from density functional calculations. J Mol Model 2016; 22:60. [DOI: 10.1007/s00894-016-2930-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 02/04/2016] [Indexed: 11/30/2022]
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34
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Jungk P, Fischer F, Thiel I, Hapke M. CoCl(PPh3)3 as Cyclotrimerization Catalyst for Functionalized Triynes under Mild Conditions. J Org Chem 2015; 80:9781-93. [DOI: 10.1021/acs.joc.5b01623] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Phillip Jungk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Fabian Fischer
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Indre Thiel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
| | - Marko Hapke
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
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35
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Yang J, Seto YW, Yoshikai N. Cobalt-Catalyzed Intermolecular Hydroacylation of Olefins through Chelation-Assisted Imidoyl C–H Activation. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00581] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junfeng Yang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yuan Wah Seto
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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36
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Vikse KL, McIndoe JS. Mechanistic insights from mass spectrometry: examination of the elementary steps of catalytic reactions in the gas phase. PURE APPL CHEM 2015. [DOI: 10.1515/pac-2014-1118] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractReal-time mass spectrometric monitoring of speciation in a catalytic reaction while it is occurring provides powerful insights into mechanistic aspects of the reaction, but cannot be expected to elucidate all details. However, mass spectrometers are not limited just to analysis: they can serve as reaction vessels in their own right, and given their powers of separation and activation in the gas phase, they are also capable of generating and isolating reactive intermediates. We can use these capabilities to help fill in our overall understanding of the catalytic cycle by examining the elementary steps that make it up. This article provides examples of how these simple reactions have been examined in the gas phase.
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Affiliation(s)
- Krista L. Vikse
- 1Laboratorium für Organische Chemie, ETH Zürich, HCI G 220, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - J. Scott McIndoe
- 2Department of Chemistry, University of Victoria, P.O. Box 3065 Victoria, BC V8W3V6, Canada
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37
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Möckel R, Hilt G. Synthesis of Polysubstituted Iodobenzene Derivatives from Alkynylsilanes and 1,3-Dienes via Diels–Alder/Oxidation/Iodination Reaction Sequence. Org Lett 2015; 17:1644-7. [DOI: 10.1021/acs.orglett.5b00306] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert Möckel
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, D-35043 Marburg, Germany
| | - Gerhard Hilt
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, D-35043 Marburg, Germany
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38
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39
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Schäfer M, Fiebig L, Held J, Schmalz HG. Individual steps of the Mizoroki-Heck reaction and intrinsic reactivity of intermediate organopalladium complexes studied in the gas phase. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2015; 21:623-633. [PMID: 26307741 DOI: 10.1255/ejms.1310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The mechanism of the Mizoroki-Heck reaction (MHR) was analyzed by collision-induced dissociation (CID) tandem-mass spectrometry and gas-phase ion/molecule reactions (IMRs) as well as by DFT computational analysis. The MHR was performed in the gas phase and the intrinsic reactivity of important intermediates was examined individually. Kinetics and substituent effects of cationic palladium- Pcy3-aryl complexes (Cy = cyclohexyl) with 2,3-dimethylbutadiene in the MHR were analyzed via IMRs and CID. The kinetics and ion structures of the species involved in the olefin insertion, i.e., the carbopalladation, were investigated. Moreover, linear free-energy correlations were applied and a concerted mechanism proceeding via a four-membered transition state for the carbopalladation step that exhibited only a minor charge separation was deduced.
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Affiliation(s)
- Mathias Schäfer
- Department of Chemistry, Institute of Organic Chemistry, University of Cologne, Greinstraße 4, 50939 Köln, Germany.
| | - Lukas Fiebig
- Department of Chemistry, Institute of Organic Chemistry, University of Cologne, Greinstraß e 4, 50939 Köln, Germany.
| | - Joseph Held
- Department of Chemistry, Institute of Theoretical Chemistry, University of Cologne, Greinstraße 4, 50939 Köln, Germany.
| | - Hans-Günther Schmalz
- Department of Chemistry, Institute of Organic Chemistry, University of Cologne, Greinstraße 4, 50939 Köln, Germany.
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40
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An Alternative Mechanism for the Cobalt-Catalyzed Isomerization of Terminal Alkenes to (Z)-2-Alkenes. Angew Chem Int Ed Engl 2014; 54:801-4. [DOI: 10.1002/anie.201409902] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Indexed: 11/07/2022]
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41
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Schmidt A, Nödling AR, Hilt G. Ein alternativer Mechanismus für die Cobalt-katalysierte Isomerisierung von terminalen Alkenen zu (Z)-2-Alkenen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409902] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Yang J, Yoshikai N. Cobalt-Catalyzed Enantioselective Intramolecular Hydroacylation of Ketones and Olefins. J Am Chem Soc 2014; 136:16748-51. [DOI: 10.1021/ja509919x] [Citation(s) in RCA: 162] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Junfeng Yang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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Komeyama K, Okamoto Y, Takaki K. Cobalt-Catalyzed Formal [4+2] Cycloaddition of α,α′-Dichloro-ortho-Xylenes with Alkynes. Angew Chem Int Ed Engl 2014; 53:11325-8. [DOI: 10.1002/anie.201406807] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 11/11/2022]
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44
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Komeyama K, Okamoto Y, Takaki K. Cobalt-Catalyzed Formal [4+2] Cycloaddition of α,α′-Dichloro-ortho-Xylenes with Alkynes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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45
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Hilt G. 1,4-Cyclohexadienes-Easy Access to a Versatile Building Block via Transition-Metal-Catalysed Diels-Alder Reactions. CHEM REC 2014; 14:386-96. [DOI: 10.1002/tcr.201400001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Indexed: 12/29/2022]
Affiliation(s)
- Gerhard Hilt
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße D-35043 Marburg Germany
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46
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Nishimura A, Tamai E, Ohashi M, Ogoshi S. Synthesis of cyclobutenes and allenes by cobalt-catalyzed cross-dimerization of simple alkenes with 1,3-enynes. Chemistry 2014; 20:6613-7. [PMID: 24782325 DOI: 10.1002/chem.201402218] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Indexed: 11/07/2022]
Abstract
Cobalt-catalyzed cross-dimerization of simple alkenes with 1,3-enynes is reported. A [2+2] cycloaddition reaction occurred, with alkenes bearing no allylic hydrogen, by reductive elimination of a η(3)-butadienyl cobaltacycle. On the other hand, aliphatic alkenes underwent 1,4-hydroallylation by means of exo-cyclic β-H elimination. These reactions can provide cyclobutenes and allenes that were previously difficult to access, from simple substrates in a highly chemo- and regioselective manner.
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Affiliation(s)
- Akira Nishimura
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871 (Japan), Fax: (+81) 6-6879-7394
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47
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Fiebig L, Schlörer N, Schmalz HG, Schäfer M. Aryl-Phenyl Scrambling in Intermediate Organopalladium Complexes: A Gas-Phase Study of the Mizoroki-Heck Reaction. Chemistry 2014; 20:4906-10. [DOI: 10.1002/chem.201400115] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 02/21/2014] [Indexed: 11/10/2022]
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48
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Chen QA, Kim DK, Dong VM. Regioselective hydroacylation of 1,3-dienes by cobalt catalysis. J Am Chem Soc 2014; 136:3772-5. [PMID: 24588202 PMCID: PMC4117386 DOI: 10.1021/ja500268w] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Indexed: 01/20/2023]
Abstract
We describe a cobalt-catalyzed hydroacylation of 1,3-dienes with non-chelating aldehydes. Aromatic aldehydes provide 1,4-addition products as the major isomer, while aliphatic aldehydes favor 1,2-hydroacylation products. The kinetic profile supports an oxidative cyclization mechanism involving a cobaltacycle intermediate that undergoes transformation with high regio- and stereoselectivity.
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Affiliation(s)
- Qing-An Chen
- Department
of Chemistry, University of California,
Irvine, 4403 Natural
Sciences 1, Irvine, California 92697, United States
| | - Daniel K. Kim
- Department
of Chemistry, University of California,
Irvine, 4403 Natural
Sciences 1, Irvine, California 92697, United States
| | - Vy M. Dong
- Department
of Chemistry, University of California,
Irvine, 4403 Natural
Sciences 1, Irvine, California 92697, United States
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