1
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Lázaro-Milla C, da Concepción E, Fernández I, Mascareñas JL, López F. Cobalt-Catalyzed (3 + 2) Cycloaddition of Cyclopropene-Tethered Alkynes: Versatile Access to Bicyclic Cyclopentadienyl Systems and Their CpM Complexes. ACS Catal 2024; 14:11574-11583. [PMID: 39119354 PMCID: PMC11307490 DOI: 10.1021/acscatal.4c03080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 07/08/2024] [Accepted: 07/10/2024] [Indexed: 08/10/2024]
Abstract
Low-valent cobalt complexes can promote intramolecular (3 + 2) cycloadditions of alkyne-tethered cyclopropenes to provide bicyclic systems containing highly substituted cyclopentadienyl moieties with electronically diverse functional groups. The adducts can be easily transformed into new types of CpRh(III) and CpIr(III) complexes, which show catalytic activity in several relevant transformations. Preliminary computational (DFT) and experimental studies provide relevant information on the mechanistic peculiarities of the cobalt-catalyzed process and allow us to rationalize its advantages over the homologous rhodium-promoted reaction.
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Affiliation(s)
- Carlos Lázaro-Milla
- Centro Singular de Investigación en
Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de
Química Orgánica, Universidade de Santiago de
Compostela, 15782 Santiago de Compostela, Spain
| | - Eduardo da Concepción
- Centro Singular de Investigación en
Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de
Química Orgánica, Universidade de Santiago de
Compostela, 15782 Santiago de Compostela, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I,
Facultad de Ciencias Químicas, Universidad Complutense de
Madrid, 28040 Madrid, Spain
| | - José L. Mascareñas
- Centro Singular de Investigación en
Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de
Química Orgánica, Universidade de Santiago de
Compostela, 15782 Santiago de Compostela, Spain
| | - Fernando López
- Centro Singular de Investigación en
Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de
Química Orgánica, Universidade de Santiago de
Compostela, 15782 Santiago de Compostela, Spain
- Misión Biológica de Galicia,
Consejo Superior de Investigaciones Científicas
(CSIC), 36080 Pontevedra, Spain
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2
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Yu KX, Liu SN, Xing YY, Huang F, Wang WJ, Wang Q, Chen DZ, Wang J. Mechanistic Investigation on the Regioselectivity of Electrochemical Co(II)-Catalyzed [2 + 2 + 2] Cycloaddition of Terminal Acetylenes. J Org Chem 2024. [PMID: 38779840 DOI: 10.1021/acs.joc.4c00513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
In this paper, the regioselectivity of electrochemical Co(II)-catalyzed [2 + 2 + 2] cycloaddition of terminal alkynes was investigated using density functional theory. We explored in detail the energy profiles for both 1,2,4- and 1,3,5-regioselectivity pathways and revealed the origin of the regioselectivity. Two kinds of conformational isomers derived from the different coordination modes of alkynes with cobaltacyclopentadiene have been found, which were formed through electrochemically mediated redox processes. The regioselectivity of the reaction depends on the two coordination modes. When the Co(II) center attacks α-C of the third alkyne, while β2-C in cyclopentadiene bonds to β-C of the alkyne, the reaction favors the formation of 1,2,4-products. In contrast, when the Co(II) center connects to β-C of the alkyne, it forms only the 1,3,5-products via [4 + 2] cycloaddition because of the steric repulsion between the bulky ligand on Co(II) and the phenyl group in the alkyne.
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Affiliation(s)
- Kai-Xin Yu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Sheng-Nan Liu
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Yang-Yang Xing
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Fang Huang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Wen-Juan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Qiong Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - De-Zhan Chen
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
| | - Jin Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P. R. China
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3
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Luo Z, Shehzad A. Advances in Naked Metal Clusters for Catalysis. Chemphyschem 2024; 25:e202300715. [PMID: 38450926 DOI: 10.1002/cphc.202300715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 03/08/2024]
Abstract
The properties of sub-nano metal clusters are governed by quantum confinement and their large surface-to-bulk ratios, atomically precise compositions and geometric/electronic structures. Advances in metal clusters lead to new opportunities in diverse aspects of sciences including chemo-sensing, bio-imaging, photochemistry, and catalysis. Naked metal clusters having synergic multiple active sites and coordinative unsaturation and tunable stability/activity enable researchers to design atomically precise metal catalysts with tailored catalysis for different reactions. Here we summarize the progress of ligand-free naked metal clusters for catalytic applications. It is anticipated that this review helps to better understand the chemistry of small metal clusters and facilitates the design and development of new catalysts for potential applications.
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Affiliation(s)
- Zhixun Luo
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Aamir Shehzad
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, China
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4
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Xue M, Peng Z, Tao K, Jia J, Song D, Tung CH, Wang W. Catalytic hydrogenation of olefins by a multifunctional molybdenum-sulfur complex. Nat Commun 2024; 15:797. [PMID: 38280870 PMCID: PMC10821942 DOI: 10.1038/s41467-024-45018-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 01/12/2024] [Indexed: 01/29/2024] Open
Abstract
Exploration of molybdenum complexes as homogeneous hydrogenation catalysts has garnered significant attention, but hydrogenation of unactivated olefins under mild conditions are scarce. Here, we report the synthesis of a molybdenum complex, [Cp*Mo(Ph2PC6H4S-CH = CH2)(Py)]+ (2), which exhibits intriguing reactivity toward C2H2 and H2 under ambient pressure. This vinylthioether complex showcases efficient catalytic activity in the hydrogenation of various aromatic and aliphatic alkenes, demonstrating a broad substrate scope without the need for any additives. The catalytic pathway involves an uncommon oxidative addition of H2 to the cationic Mo(II) center, resulting in a Mo(IV) dihydride intermediate. Moreover, complex 2 also shows catalytic activity toward C2H2, leading to the production of polyacetylene and the extension of the vinylthioether ligand into a pendant triene chain.
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Affiliation(s)
- Minghui Xue
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, China
| | - Zhiqiang Peng
- College of Chemistry, Beijing Normal University, 100875, Beijing, China
| | - Keyan Tao
- College of Chemistry, Beijing Normal University, 100875, Beijing, China
| | - Jiong Jia
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, China
| | - Datong Song
- Davenport Chemical Research Laboratories, Department of Chemistry, University of Toronto, Toronto, ON, M5S 3H6, Canada.
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, China
| | - Wenguang Wang
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, China.
- College of Chemistry, Beijing Normal University, 100875, Beijing, China.
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5
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Chaussy L, Delorme M, Punter A, Carissan Y, Parrain JL, Amatore M, Nava P, Commeiras L. Mechanistic insight into cobalt-mediated [2 + 2 + 2]-cycloaddition reactions with γ-alkylidenebutenolide and γ-alkylidenebuterolactam as 2π partners. Dalton Trans 2023; 52:14123-14131. [PMID: 37747193 DOI: 10.1039/d3dt02291a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
The molecular complexity of recently reported cobalt(III) polycyclic complexes, resulting from an intramolecular formal (2 + 2 + 3) cycloaddition reaction on an enediyne containing a lactone moiety, has prompted us to computationally review the mechanisms of cobalt cycloaddition reactions with γ-alkylidenebutenolide or γ-alkylidenebuterolactam as 2π partners. Computed mechanisms are compared, leading to either cobalt(III)- or cobalt(I)-spiro complexes depending of both the nature of the reaction (intra- vs. intermolecular pathway) and the nature of the 2π partner (γ-alkylidenebutenolide vs. γ-alkylidenebuterolactam). These proposed mechanisms are supported by experiments, allowing us to report the synthesis and characterization of the predicted compounds.
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Affiliation(s)
- Léo Chaussy
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Marion Delorme
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Alexander Punter
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Yannick Carissan
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Jean-Luc Parrain
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Muriel Amatore
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Paola Nava
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Laurent Commeiras
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
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6
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Prather KV, Tsui EY. Photoinduced Ligand-to-Metal Charge Transfer of Cobaltocene: Radical Release and Catalytic Cyclotrimerization. Inorg Chem 2023; 62:2128-2134. [PMID: 36701811 DOI: 10.1021/acs.inorgchem.2c03779] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Irradiation of cobalt metallocenes at the ligand-to-metal charge transfer energies results in the labilization of the cyclopentadienyl-cobalt bond and radical release. The cyclopentadienyl radical is detected by electron paramagnetic resonance (EPR) spectroscopy using a spin trap and can also be chemically trapped using hydrogen-atom-donating reagents. This reaction presents a new photochemical method of generating new cobalt complexes or of forming cyclopentadienyl cobalt(I) species that are active for catalytic [2 + 2 + 2] cyclotrimerization reactions. More importantly, these results also show that cobaltocene should not be considered as a photostable redox reagent under many conditions, including those relevant to photovoltaics or photocatalysis.
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Affiliation(s)
- Keaton V Prather
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Emily Y Tsui
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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7
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Alkyne Coupling and Cyclization on Metal Cluster Complexes. Additions and Couplings of Dimethyl acetylenedicarboxylate to Ru6(μ6-C)(CO)14(μ3-η4-C4H4). J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Lan J, Zhang T, Yang Y, Li X, Chung LW. A Mechanistic Study of the Cobalt(I)-Catalyzed Amination of Aryl Halides: Effects of Metal and Ligand. Inorg Chem 2022; 61:18019-18032. [DOI: 10.1021/acs.inorgchem.2c02385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jialing Lan
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Tonghuan Zhang
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
- Lab of Computational Chemistry and Drug Design, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yuhong Yang
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Xin Li
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Lung Wa Chung
- Shenzhen Grubbs Institute, Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
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9
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Yun X, Yu Z, Liu T. Mechanistic insight into the [2 + 2 + 2] cycloadditions between 1,6-diyne and benzoquinone catalyzed by rhodium complex: A theoretical study. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Gan W, Geng L, Yin B, Zhang H, Luo Z, Hansen K. Cyclotrimerization of Acetylene on Clusters Co n+/Fe n+/Ni n+( n = 1-16). J Phys Chem A 2021; 125:10392-10400. [PMID: 34846886 DOI: 10.1021/acs.jpca.1c09015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cyclotrimerization of acetylene to benzene has attracted significant interest, but the role of geometric and electronic effects on catalytic chemistry remains unclear. To fully elucidate the mechanism of catalytic acetylene-to-benzene conversion, we have performed a gas-phase reaction study of the Fen+, Con+, and Nin+ (n = 1-16) clusters with acetylene utilizing a customized mass spectrometer. It is found that their reactions with acetylene are initiated by C2H2 molecular adsorption and allow for dominant dehydrogenation with the relatively low partial pressure of the acetylene gas. However, at high acetylene concentrations, the cyclotrimerization in Mn+ + 3C2H2 (M = Fe, Co, Ni) becomes the dominant reaction channel. We demonstrate theoretically the favorable thermodynamics and reaction dynamics leading to the formation of the M+(C6H6) products. The results are discussed in terms of a cluster-catalyzed multimolecule synergistic effect and the cation-π interactions.
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Affiliation(s)
- Wen Gan
- Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lijun Geng
- Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Baoqi Yin
- Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hanyu Zhang
- Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhixun Luo
- Beijing National Laboratory for Molecular Science, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Klavs Hansen
- Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 92 Weijin Road, Tianjin 300072, China
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11
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Harper JL, Felten S, Stolley RM, Hegg AS, Cheong PHY, Louie J. Origins of Regio- and Chemoselectivity in Iron-PDAI-Catalyzed [2+2+2] Cycloaddition Syntheses of 4,6-Disubstituted 2-Aminopyridines. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03871] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jordan L. Harper
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Stephanie Felten
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Ryan M. Stolley
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Alexander S. Hegg
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
| | - Paul H.-Y. Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, United States
| | - Janis Louie
- Department of Chemistry, The University of Utah, 315 S 1400 E, Salt Lake City, Utah 84112, United States
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12
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Heß M, Krummenacher I, Dellermann T, Braunschweig H. Rhodium-Mediated Stoichiometric Synthesis of Mono-, Bi-, and Bis-1,2-Azaborinines: 1-Rhoda-3,2-azaboroles as Reactive Precursors. Chemistry 2021; 27:9503-9507. [PMID: 34060149 PMCID: PMC8362125 DOI: 10.1002/chem.202100795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Indexed: 11/22/2022]
Abstract
A series of highly substituted 1,2-azaborinines, including a phenylene-bridged bis-1,2-azaborinine, was synthesized from the reaction of 1,2-azaborete rhodium complexes with variously substituted alkynes. 1-Rhoda-3,2-azaborole complexes, which are accessible by phosphine addition to the corresponding 1,2-azaborete complexes, were also found to be suitable precursors for the synthesis of 1,2-azaborinines and readily reacted with alkynyl-substituted 1,2-azaborinines to generate new regioisomers of bi-1,2-azaborinines, which feature directly connected aromatic rings. Their molecular structures, which can be viewed as boron-nitrogen isosteres of biphenyls, show nearly perpendicular 1,2-azaborinine rings. The new method using rhodacycles instead of 1,2-azaborete complexes as precursors is shown to be more effective, allowing the synthesis of a wider range of 1,2-azaborinines.
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Affiliation(s)
- Merlin Heß
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Theresa Dellermann
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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13
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Orian L, Bickelhaupt FM. Designing Rh(I)-Half-Sandwich Catalysts for Alkyne [2+2+2] Cycloadditions. Synlett 2021. [DOI: 10.1055/s-0040-1707284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractMetal-mediated [2+2+2] cycloadditions of unsaturated molecules to cyclic and polycyclic organic compounds are a versatile synthetic route affording good yields and selectivity under mild conditions. In the last two decades, in silico investigations have unveiled important details about the mechanism and the energetics of the whole catalytic cycle. Particularly, a number of computational studies address the topic of half-sandwich catalysts which, due to their structural fluxionality, have been widely employed, since the 1980s. In these organometallic species, the metal is coordinated to an aromatic ring, typically the ubiquitous cyclopentadienyl anion, C5H5
–(Cp) or to the Cp moiety of a larger polycyclic aromatic ligand (Cp′). During the catalytic process, the metal continuously ‘slips’ on the ring, changing its hapticity. This phenomenon of metal slippage and its implications for the catalyst’s performance are discussed in this work, referring to the most important computational mechanistic studies reported in literature for Rh(I) half-metallocenes, with the purpose of providing hints for a rational design of this class of compounds.1 Introduction2 Mechanism of Metal-Catalyzed Acetylene [2+2+2] Cycloaddition to Benzene and the Problem of the Indenyl Effect2.1 Acetylene-Acetonitrile [2+2+2] Co-cycloaddition to 2-Methylpyridine: Evidence of the Indenyl Effect2.2 Heteroaromatic Catalysts and the Evidence of a Reverse Indenyl Effect2.3 Booth’s Mechanistic Hypothesis and the Evidence of the Indenyl Effect3 Structure–Reactivity Correlation: The Slippage-Span Model4 Conclusions and Perspectives
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Affiliation(s)
- Laura Orian
- Dipartimento di Scienze Chimiche Università degli Studi di Padova
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam
- Institute of Molecules and Materials, Radboud University
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14
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Shankar M, Saha A, Sau S, Ghosh A, Gandon V, Sahoo AK. Harnessing sulfur and nitrogen in the cobalt(iii)-catalyzed unsymmetrical double annulation of thioamides: probing the origin of chemo- and regio-selectivity. Chem Sci 2021; 12:6393-6405. [PMID: 34084439 PMCID: PMC8115082 DOI: 10.1039/d1sc00765c] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/19/2021] [Indexed: 12/27/2022] Open
Abstract
An unconventional cobalt(iii)-catalyzed one-pot domino double annulation of aryl thioamides with unactivated alkynes is presented. Sulfur (S), nitrogen (N), and o,o'-C-H bonds of aryl thioamides are involved in this reaction, enabling access to rare 6,6-fused thiopyrano-isoquinoline derivatives. A reverse 'S' coordination over a more conventional 'N' coordination of thioamides to the Co-catalyst specifically regulates the formation of four [C-C and C-S at first and then C-N and C-C] bonds in a single operation, a concept which is uncovered for the first time. The power of the N-masked methyl phenyl sulfoximine (MPS) directing group in this annulation sequence is established. The transformation is successfully developed, building a novel chemical space of structural diversity (56 examples). In addition, the late-stage annulation of biologically relevant motifs and drug candidates is disclosed (17 examples). The preliminary photophysical properties of thiopyrano-isoquinoline derivatives are discussed. Density functional theory (DFT) studies authenticate the participation of a unique 6π-electrocyclization of a 7-membered S-chelated cobaltacycle in the annulation process.
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Affiliation(s)
- Majji Shankar
- School of Chemistry, University of Hyderabad Hyderabad India
| | - Arijit Saha
- School of Chemistry, University of Hyderabad Hyderabad India
| | - Somratan Sau
- School of Chemistry, University of Hyderabad Hyderabad India
| | - Arghadip Ghosh
- School of Chemistry, University of Hyderabad Hyderabad India
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Saclay Bâtiment 420 91405 Orsay cedex France
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris route de Saclay 91128 Palaiseau cedex France
| | - Akhila K Sahoo
- School of Chemistry, University of Hyderabad Hyderabad India
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15
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Yamamoto Y. Theoretical Study of the Mechanism of Palladium(0)‐Catalyzed Intramolecular [2+2+2] Cycloaddition of Ester‐Substituted Alkynes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences Graduate School of Pharmaceutical Sciences Nagoya University Chikusa 464‐8601 Nagoya Japan
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16
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Roglans A, Pla-Quintana A, Solà M. Mechanistic Studies of Transition-Metal-Catalyzed [2 + 2 + 2] Cycloaddition Reactions. Chem Rev 2020; 121:1894-1979. [DOI: 10.1021/acs.chemrev.0c00062] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Anna Roglans
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Quı́mica Computacional i Catàlisi (IQCC) and Departament de Quı́mica, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003, Girona, Catalonia, Spain
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17
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Witzke RJ, Hait D, Chakarawet K, Head-Gordon M, Tilley TD. Bimetallic Mechanism for Alkyne Cyclotrimerization with a Two-Coordinate Fe Precatalyst. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01828] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryan J. Witzke
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Diptarka Hait
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Khetpakorn Chakarawet
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
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18
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Orsino AF, Moret ME. Nickel-Catalyzed Alkyne Cyclotrimerization Assisted by a Hemilabile Acceptor Ligand: A Computational Study. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00172] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Alessio F. Orsino
- Utrecht University, Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht University, Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Faculty of Science, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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19
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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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20
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Du J, Chen W, Chen Q, Leng X, Meng YS, Gao S, Deng L. Reactivity of a Two-Coordinate Cobalt(0) Cyclic (Alkyl)(amino)carbene Complex. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00875] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jingzhen Du
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Wenwei Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Qi Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Xuebing Leng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Yin-Shan Meng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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21
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Chu M, Planas O, Company A, Ribas X, Hamilton A, Whiteoak CJ. Unravelling the mechanism of cobalt-catalysed remote C-H nitration of 8-aminoquinolinamides and expansion of substrate scope towards 1-naphthylpicolinamide. Chem Sci 2020; 11:534-542. [PMID: 32190273 PMCID: PMC7067239 DOI: 10.1039/c9sc05076k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 11/16/2019] [Indexed: 11/21/2022] Open
Abstract
Previously, an unexpected Co-catalysed remote C-H nitration of 8-aminoquinolinamide compounds was developed. This report provided a novel reactivity for Co which was assumed to proceed through the mechanistic pathway already known for analogous Cu-catalysed remote couplings of the same substrates. In order to shed light into this intriguing, and previously unobserved reactivity for Co, a thorough computational study has now been performed, which has allowed for a full understanding of the operative mechanism. This study demonstrates that the Co-catalysed remote coupling does not occur through the previously proposed Single Electron Transfer (SET) mechanism, but actually operates through a high-spin induced remote radical coupling mechanism, through a key intermediate with significant proportion of spin density at the 5- and 7-positions of the aminoquinoline ring. Additionally, new experimental data provides expansion of the synthetic utility of the original nitration procedure towards 1-naphthylpicolinamide which unexpectedly appears to operate via a subtly different mechanism despite having a similar chelate environment.
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Affiliation(s)
- Melody Chu
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
| | - Oriol Planas
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Anna Company
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Xavi Ribas
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Alex Hamilton
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
| | - Christopher J Whiteoak
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
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22
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Amakasu T, Sato K, Ohta Y, Kitazawa G, Sato H, Oumiya K, Kawakami Y, Takeuchi T, Kabe Y. CpCo(I)- and Cp*Ru(II)Cl-catalyzed [2+2+2] cycloadditions of siladiynes and alkynes: A combined experimental and theoretical study. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2019.121006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Fischer F, Pientka T, Jiao H, Spannenberg A, Hapke M. CpCo( i) precatalysts for [2 + 2 + 2] cycloaddition reactions: synthesis and reactivity. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00876a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of CpCo complexes containing olefins and phosphite/phosphoramidite ligands give access to a reactive class of precatalysts for cyclotrimerisation reactions.
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Affiliation(s)
- Fabian Fischer
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Tobias Pientka
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
| | - Marko Hapke
- Leibniz-Institut für Katalyse e.V. (LIKAT Rostock)
- D-18059 Rostock
- Germany
- Johannes Kepler Universität Linz, Institut für Katalyse (INCA)
- A-4040 Linz
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24
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Marks JH, Ward TB, Brathwaite AD, Ferguson S, Duncan MA. Cyclotrimerization of Acetylene in Gas Phase V+(C2H2)n Complexes: Detection of Intermediates and Products with Infrared Spectroscopy. J Phys Chem A 2019; 123:6733-6743. [DOI: 10.1021/acs.jpca.9b04962] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joshua H. Marks
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Timothy B. Ward
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | | | - Sojourna Ferguson
- College of Science and Mathematics, University of the Virgin Islands, St. Thomas, United States Virgin Islands 00802
| | - Michael A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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25
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Torres Ò, Fernàndez M, Díaz-Jiménez À, Pla-Quintana A, Roglans A, Solà M. Examining the Factors That Govern the Regioselectivity in Rhodium-Catalyzed Alkyne Cyclotrimerization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00347] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Òscar Torres
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Martí Fernàndez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Àlex Díaz-Jiménez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Catalonia, Spain
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26
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Lubitz K, Radius U. The Coupling of N-Heterocyclic Carbenes to Terminal Alkynes at Half Sandwich Cobalt NHC Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00241] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Katharina Lubitz
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Udo Radius
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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27
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Weber SM, Hilt G. Chemoselective Cobalt(I)-Catalyzed Cyclotrimerization of (Un)Symmetrical 1,3-Butadiynes for the Synthesis of 1,2,4-Regioisomers. Org Lett 2019; 21:4106-4110. [DOI: 10.1021/acs.orglett.9b01281] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sebastian M. Weber
- Fachbereich Chemie Philipps Universität Marburg, Hans-Meerwein Strasse 4, D-35032 Marburg, Germany
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Strasse 9-11, D-26111 Oldenburg, Germany
| | - Gerhard Hilt
- Fachbereich Chemie Philipps Universität Marburg, Hans-Meerwein Strasse 4, D-35032 Marburg, Germany
- Institut für Chemie, Universität Oldenburg, Carl-von-Ossietzky-Strasse 9-11, D-26111 Oldenburg, Germany
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28
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Orsino A, Gutiérrez del Campo M, Lutz M, Moret ME. Enhanced Catalytic Activity of Nickel Complexes of an Adaptive Diphosphine-Benzophenone Ligand in Alkyne Cyclotrimerization. ACS Catal 2019; 9:2458-2481. [PMID: 30854242 PMCID: PMC6400243 DOI: 10.1021/acscatal.8b05025] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/29/2019] [Indexed: 12/15/2022]
Abstract
Adaptive ligands, which can adapt their coordination mode to the electronic structure of various catalytic intermediates, offer the potential to develop improved homogeneous catalysts in terms of activity and selectivity. 2,2'-Diphosphinobenzophenones have previously been shown to act as adaptive ligands, the central ketone moiety preferentially coordinating reduced metal centers. Herein, the utility of this scaffold in nickel-catalyzed alkyne cyclotrimerization is investigated. The complex [( p-tolL1)Ni(BPI)] ( p-tolL1 = 2,2'-bis(di(para-tolyl)phosphino)-benzophenone; BPI = benzophenone imine) is an active catalyst in the [2 + 2 + 2] cyclotrimerization of terminal alkynes, selectively affording 1,2,4-substituted benzenes from terminal alkynes. In particular, this catalyst outperforms closely related bi- and tridentate phosphine-based Ni catalysts. This suggests a reaction pathway involving a hemilabile interaction of the C=O unit with the nickel center. This is further borne out by a comparative study of the observed resting states and DFT calculations.
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Affiliation(s)
- Alessio
F. Orsino
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
| | - Manuel Gutiérrez del Campo
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
| | - Martin Lutz
- Utrecht
University, Crystal and Structural
Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Utrecht
University, Organic Chemistry
and Catalysis, Debye Institute for Nanomaterials Science, Faculty
of Science, Universiteitsweg
99, 3584 CG Utrecht, The Netherlands
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29
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Liu S, Qi X, Bai R, Lan Y. Theoretical Study of Ni-Catalyzed C–N Radical–Radical Cross-Coupling. J Org Chem 2019; 84:3321-3327. [DOI: 10.1021/acs.joc.8b03245] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Song Liu
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Xiaotian Qi
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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30
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Schmolke L, Gregori BJ, Giesen B, Schmitz A, Barthel J, Staiger L, Fischer RA, Jacobi von Wangelin A, Janiak C. Bimetallic Co/Al nanoparticles in an ionic liquid: synthesis and application in alkyne hydrogenation. NEW J CHEM 2019. [DOI: 10.1039/c9nj03622a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CoAl- and Co3Al-NPs are effective catalysts for alkyne-to-alkane hydrogenation with DIBAL-H as a co-catalyst under mild conditions (2 bar H2, 30 °C).
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Affiliation(s)
- Laura Schmolke
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Bernhard J. Gregori
- Institut für Anorganische und Angewandte Chemie
- Universität Hamburg
- 20146 Hamburg
- Germany
| | - Beatriz Giesen
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Alexa Schmitz
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Juri Barthel
- Ernst Ruska-Centrum für Mikroskopie und Spektroskopie mit Elektronen (ER-C 2)
- D-52425 Jülich
- Germany
| | - Lena Staiger
- Department of Chemistry
- Technische Universität München
- D-85748 Garching
- Germany
| | - Roland A. Fischer
- Department of Chemistry
- Technische Universität München
- D-85748 Garching
- Germany
| | | | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
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31
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Delorme M, Punter A, Oliveira R, Aubert C, Carissan Y, Parrain JL, Amatore M, Nava P, Commeiras L. When cobalt-mediated [2 + 2 + 2] cycloaddition reaction dares go astray: synthesis of unprecedented cobalt(iii)-complexes. Dalton Trans 2019; 48:15767-15771. [DOI: 10.1039/c9dt03311d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The cobalt-mediated cycloaddition with γ-alkylidenebutenolide diverges dramatically from what is expected, leading to unprecedented polycyclic scaffold cobalt(iii)-complexes. The mechanism of this reaction has been studied by DFT calculations.
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Affiliation(s)
| | | | - Raquel Oliveira
- PASTEUR
- Département de chimie
- Ecole Normale Supérieure
- PSL University
- Sorbonne Université
| | - Corinne Aubert
- Sorbonne Universités
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
| | | | | | | | - Paola Nava
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
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32
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Geer AM, Julián A, López JA, Ciriano MA, Tejel C. Pseudo-tetrahedral Rhodium and Iridium Complexes: Catalytic Synthesis of E-Enynes. Chemistry 2018; 24:17545-17556. [PMID: 30207408 DOI: 10.1002/chem.201803878] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Indexed: 01/04/2023]
Abstract
The reactions of the rhodium(I) and iridium(I) complexes [M(PhBP3 )(C2 H4 )(NCMe)] (PhBP3 =PhB(CH2 PPh2 )3 - ) with alkynes have resulted in the synthesis of a new family of pseudo-tetrahedral complexes, [M(PhBP3 )(RC≡CR')] (M=Rh, Ir), which contain the alkyne as a four-electron donor. The reactions of these unusual compounds with two-electron donors (L=PMe3 , CNtBu) produced a change in the "donicity" of the alkyne from a 4e- to a 2e- donor to give five-coordinate complexes. These were the final products with the iridium complexes, whereas further reactions took place with the rhodium complexes. In particular, C(sp)-H bond activation of the alkyne occurred leading to hydrido alkynyl complexes. This process is essential for the further reactivity of the alkynes, and if the alkyne itself was used as reagent, E-enyne complexes were obtained. As a consequence of this chemistry, we show that the complex [Rh(PhBP3 )(C2 H4 )(NCMe)] is a very efficient pre-catalyst for the regioselective di- and trimerization of terminal alkynes to E-enynes and benzene derivatives, respectively. Interestingly, acetonitrile significantly enhanced the catalytic activity by facilitating the C(sp)-H bond activation step. A hydrometalation mechanism to account for these experimental observations is proposed.
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Affiliation(s)
- Ana M Geer
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Alejandro Julián
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis QuímicayCatálisis Homogénea-ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
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33
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34
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Farley CM, Zhou YY, Banka N, Uyeda C. Catalytic Cyclooligomerization of Enones with Three Methylene Equivalents. J Am Chem Soc 2018; 140:12710-12714. [PMID: 30216053 PMCID: PMC6187372 DOI: 10.1021/jacs.8b08296] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cyclic structures are highly represented in organic molecules, motivating a wealth of catalytic methods targeting their synthesis. Among the various ring-forming processes, cyclooligomerization reactions possess several attractive features but require addressing a unique challenge associated with controlling ring-size selectivity. Here we describe the catalytic reductive cocyclooligomerization of an enone and three carbene equivalents to generate a cyclopentane, a process that constitutes a formal [2 + 1 + 1 + 1]-cycloaddition. The reaction is promoted by a (quinox)Ni catalyst and uses CH2Cl2/Zn as the C1 component. Mechanistic studies are consistent with a metallacycle-based pathway, featuring sequential migratory insertions of multiple carbene equivalents to yield cycloalkanes larger than cyclopropanes.
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Affiliation(s)
- Conner M Farley
- Department of Chemistry , Purdue University , 560 Oval Drive , West Lafayette , Indiana 47907 , United States
| | - You-Yun Zhou
- Department of Chemistry , Purdue University , 560 Oval Drive , West Lafayette , Indiana 47907 , United States
| | - Nishit Banka
- Department of Chemistry , Purdue University , 560 Oval Drive , West Lafayette , Indiana 47907 , United States
| | - Christopher Uyeda
- Department of Chemistry , Purdue University , 560 Oval Drive , West Lafayette , Indiana 47907 , United States
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35
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Highly regioselective cobalt-catalyzed [2+2+2] cycloaddition of fluorine-containing internal alkynes to construct various fluoroalkylated benzene derivatives. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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36
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Tsurugi H, Laskar P, Yamamoto K, Mashima K. Bonding and structural features of metal-metal bonded homo- and hetero-dinuclear complexes supported by unsaturated hydrocarbon ligands. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Dalla Tiezza M, Bickelhaupt FM, Orian L. Group 9 Metallacyclopentadienes as Key Intermediates in [2+2+2] Alkyne Cyclotrimerizations. Insight from Activation Strain Analyses. Chemphyschem 2018; 19:1766-1773. [PMID: 29635782 DOI: 10.1002/cphc.201800178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 11/10/2022]
Abstract
The intramolecular oxidative coupling converting a bis-acetylene complex of formula CpM (C2 H2 )2 (Cp=C5 H5- ; M=Co, Rh, Ir) into a 16-electron metallacycle is studied in silico. This reaction is paradigmatic in acetylene [2+2+2] cycloaddition to benzene catalyzed by CpM fragments, being the step with the highest activation energy, and thus affecting the whole catalysis. Our activation strain and quantitative molecular orbital (MO) analyses elucidate the mechanistic details and reveal why cobalt performs better than rhodium and iridium catalysts outlining general principles for rational design of catalysts to be used in these processes.
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Affiliation(s)
- Marco Dalla Tiezza
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129, Padova, Italy
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands.,Institute for Molecules and Materials (IMM), Radboud University, Heyendaalseweg 135, 6525, J Nijmegen, The Netherlands
| | - Laura Orian
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35129, Padova, Italy
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38
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Affiliation(s)
- Anna Pla-Quintana
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona; C/ Maria Aurèlia Capmany 69 17003 Girona Catalonia Spain
| | - Anna Roglans
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química; Universitat de Girona; C/ Maria Aurèlia Capmany 69 17003 Girona Catalonia Spain
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39
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Barwick-Silk J, Hardy S, Willis MC, Weller AS. Rh(DPEPhos)-Catalyzed Alkyne Hydroacylation Using β-Carbonyl-Substituted Aldehydes: Mechanistic Insight Leads to Low Catalyst Loadings that Enables Selective Catalysis on Gram-Scale. J Am Chem Soc 2018; 140:7347-7357. [PMID: 29763563 DOI: 10.1021/jacs.8b04086] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The detailed mechanism of the hydroacylation of β-amido-aldehyde, 2,2-dimethyl-3-morpholino-3-oxopropanal, with 1-octyne using [Rh( cis-κ2-P,P-DPEPhos)(acetone)2][BArF4]-based catalysts, is described [ArF = (CF3)2C6H3]. A rich mechanistic landscape of competing and interconnected hydroacylation and cyclotrimerization processes is revealed. An acyl-hydride complex, arising from oxidative addition of aldehyde, is the persistent resting state during hydroacylation, and quaternary substitution at the β-amido-aldehyde strongly disfavors decarbonylation. Initial rate, KIE, and labeling studies suggest that the migratory insertion is turnover-limiting as well as selectivity determining for linear/branched products. When the concentration of free aldehyde approaches zero at the later stages of catalysis alkyne cyclotrimerization becomes competitive, to form trisubstituted hexylarenes. At this point, the remaining acyl-hydride turns over in hydroacylation and the free alkyne is now effectively in excess, and the resting state moves to a metallacyclopentadiene and eventually to a dormant α-pyran-bound catalyst complex. Cyclotrimerization thus only becomes competitive when there is no aldehyde present in solution, and as aldehyde binds so strongly to form acyl-hydride when this happens will directly correlate to catalyst loading: with low loadings allowing for free aldehyde to be present for longer, and thus higher selectivites to be obtained. Reducing the catalyst loading from 20 mol % to 0.5 mol % thus leads to a selectivity increase from 96% to ∼100%. An optimized hydroacylation reaction is described that delivers gram scale of product, at essentially quantitative levels, using no excess of either reagent, at very low catalyst loadings, using minimal solvent, with virtually no workup.
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Affiliation(s)
- James Barwick-Silk
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
| | - Simon Hardy
- Early Chemical Development , Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca , Macclesfield SK10 2NA , U.K
| | - Michael C Willis
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
| | - Andrew S Weller
- Department of Chemistry, Chemistry Research Laboratories , University of Oxford , Mansfield Road , Oxford OX1 4TA , U.K
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40
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Sugahara T, Guo JD, Sasamori T, Nagase S, Tokitoh N. Regioselective Cyclotrimerization of Terminal Alkynes Using a Digermyne. Angew Chem Int Ed Engl 2018; 57:3499-3503. [DOI: 10.1002/anie.201801222] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Tomohiro Sugahara
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
| | - Jing-Dong Guo
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
| | - Takahiro Sasamori
- Graduate School of Natural Sciences; Nagoya City University, Yamanohata 1, Mizuho-cho; Mizuho-ku Nagoya Aichi 467-8501 Japan
| | - Shigeru Nagase
- Fukui Institute for Fundamental Chemistry; Kyoto University; Sakyo-ku Kyoto 606-8103 Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
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41
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Sugahara T, Guo JD, Sasamori T, Nagase S, Tokitoh N. Regioselective Cyclotrimerization of Terminal Alkynes Using a Digermyne. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tomohiro Sugahara
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
| | - Jing-Dong Guo
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
| | - Takahiro Sasamori
- Graduate School of Natural Sciences; Nagoya City University, Yamanohata 1, Mizuho-cho; Mizuho-ku Nagoya Aichi 467-8501 Japan
| | - Shigeru Nagase
- Fukui Institute for Fundamental Chemistry; Kyoto University; Sakyo-ku Kyoto 606-8103 Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research; Kyoto University; Gokasho Uji Kyoto 611-0011 Japan
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42
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Zhang ZF, Su MD. A model study on the photodecarbonyl reaction of (η 5-C 5H 5)M(CO) 2 (M = Co, Rh, Ir). RSC Adv 2018; 8:24641-24653. [PMID: 35539200 PMCID: PMC9082091 DOI: 10.1039/c8ra03866j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 06/15/2018] [Indexed: 11/29/2022] Open
Abstract
The group 9 organometallic complexes η5-CpM(CO)2 (M = Co, Rh, and Ir) and Si(CH3)3(H) have been considered as a model system to study their photochemical decarbonyl reactions as well as the Si–H bond activation reactions using the CASSCF and MP2-CAS computational methods. For the cobalt complex, three kinds of reaction pathways, which result in the same oxidative addition product, are investigated. Our theoretical finding demonstrated that after the photoirradiation, η5-CpCo(CO)2 loses one CO ligand without any difficulty to form either the triplet ([η5-CpCo(CO)]3) or singlet ([η5-CpCo(CO)]1) species. The former plays a decisive role in the formation of the final oxidative addition product. On the other hand, the latter plays no role in the production of the final product molecule, but its singlet cobalt center interacts weakly with solvent molecules ((Me3)SiH) to produce an alkyl-solvated organometallic complex, which is experimentally detectable. The present works reveal that both η5-CpRh(CO)2 and η5-CpIr(CO)2 should adopt the conical intersection mechanism after they are irradiated by light. Moreover, our theoretical examinations strongly suggest that for the 16-electron monocarbonyl η5-CpM(CO) (M = Rh and Ir) species, the insertion into a Si–H bond by the Ir system is much more facile and more exothermic than that for the Rh counterpart. Theoretical observations show that the triplet cobalt photoproduct [η5-CpCo(CO)] activates Si–H bonds much more readily than its singlet counterpart. The conical intersection mechanism may play a decisive role in photodecarbonyl reactions of (η5-C5H5)M(CO)2 (M = Rh and Ir).![]()
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Affiliation(s)
- Zheng-Feng Zhang
- Department of Applied Chemistry
- National Chiayi University
- Chiayi 60004
- Taiwan
| | - Ming-Der Su
- Department of Applied Chemistry
- National Chiayi University
- Chiayi 60004
- Taiwan
- Department of Medicinal and Applied Chemistry
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43
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Kwon DH, Proctor M, Mendoza S, Uyeda C, Ess DH. Catalytic Dinuclear Nickel Spin Crossover Mechanism and Selectivity for Alkyne Cyclotrimerization. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00978] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Doo-Hyun Kwon
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Matthew Proctor
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Sergio Mendoza
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Christopher Uyeda
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Daniel H. Ess
- Department
of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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44
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Qi X, Zhu L, Bai R, Lan Y. Stabilization of Two Radicals with One Metal: A Stepwise Coupling Model for Copper-Catalyzed Radical-Radical Cross-Coupling. Sci Rep 2017; 7:43579. [PMID: 28272407 PMCID: PMC5341085 DOI: 10.1038/srep43579] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 01/25/2017] [Indexed: 01/24/2023] Open
Abstract
Transition metal-catalyzed radical-radical cross-coupling reactions provide innovative methods for C-C and C-heteroatom bond construction. A theoretical study was performed to reveal the mechanism and selectivity of the copper-catalyzed C-N radical-radical cross-coupling reaction. The concerted coupling pathway, in which a C-N bond is formed through the direct nucleophilic addition of a carbon radical to the nitrogen atom of the Cu(II)-N species, is demonstrated to be kinetically unfavorable. The stepwise coupling pathway, which involves the combination of a carbon radical with a Cu(II)-N species before C-N bond formation, is shown to be probable. Both the Mulliken atomic spin density distribution and frontier molecular orbital analysis on the Cu(II)-N intermediate show that the Cu site is more reactive than that of N; thus, the carbon radical preferentially react with the metal center. The chemoselectivity of the cross-coupling is also explained by the differences in electron compatibility of the carbon radical, the nitrogen radical and the Cu(II)-N intermediate. The higher activation free energy for N-N radical-radical homo-coupling is attributed to the mismatch of Cu(II)-N species with the nitrogen radical because the electrophilicity for both is strong.
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Affiliation(s)
- Xiaotian Qi
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
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45
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46
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Li H, Feng H, Xie Y, Schaefer Iii HF. The Recently Synthesized Dimagnesiabutadiene and the Analogous Dimetalla-Beryllium, -Calcium, -Strontium, and -Barium Compounds. Chemistry 2016; 22:15019-15026. [PMID: 27594658 DOI: 10.1002/chem.201603355] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Indexed: 01/03/2023]
Abstract
The 2014 synthesis of the remarkable dimagnesium compound Mg2 [C4 (CH3 )2 (Si(CH3 )3 )2 ](C3 H7 )2 (C4 H8 O)2 may point the way to a new chapter in alkaline earth organometallic chemistry. Accordingly, we have studied the known Mg compound and the analogous Be, Ca, Sr, and Ba structures. Although most of our theoretical predictions come from density functional methods, the latter have been benchmarked using coupled cluster theory including single, double, and perturbative triplet excitations, CCSD(T) using cc-pVTZ basis sets. Among our most important predictions are the energies for dissociation to the butadiene plus the RM-MR [R=(C3 H7 )2 (C4 H8 O)2 ; M=Be, Mg, Ca, Si, and Ba] entities. The most reliable predictions for the dissociation energies are 99-104 (Be), 85-93 (Mg), 90-99 (Ca), 83-92 (Sr), and 83-94 (Ba) kcal mol-1 . Thus, there is reason to anticipate that the four unknown compounds should be achievable synthetically. The predicted metal-metal distances (not single bonds) are 2.89 Å (Mg⋅⋅⋅Mg), 3.46 Å (Ca⋅⋅⋅Ca), 3.75 Å (Sr⋅⋅⋅Sr), and 4.04 Å (Ba⋅⋅⋅Ba). The separated RM-MR compounds have longer M-M distances but genuine metal-metal single bonds. This perhaps counter intuitive result is due to the presence of the bridging carbons in the alkaline earth butadiene compounds. All five compounds incorporate metal-carbon ionic interactions.
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Affiliation(s)
- Huidong Li
- Research Center for Advanced Computation, School of Science, Xihua University, Chengdu, 610039, P. R. China.
| | - Hao Feng
- Research Center for Advanced Computation, School of Science, Xihua University, Chengdu, 610039, P. R. China
| | - Yaoming Xie
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia, 30602, USA
| | - Henry F Schaefer Iii
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia, 30602, USA.
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47
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Bottari G, Santos LL, Posadas CM, Campos J, Mereiter K, Paneque M. Reaction of [TpRh(C2 H4 )2 ] with Dimethyl Acetylenedicarboxylate: Identification of Intermediates of the [2+2+2] Alkyne and Alkyne-Ethylene Cyclo(co)trimerizations. Chemistry 2016; 22:13715-23. [PMID: 27535720 DOI: 10.1002/chem.201601927] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Indexed: 11/06/2022]
Abstract
The reaction between the bis(ethylene) complex [TpRh(C2 H4 )2 ], 1, (Tp=hydrotris(pyrazolyl)borate), and dimethyl acetylenedicarboxylate (DMAD) has been studied under different experimental conditions. A mixture of products was formed, in which TpRh(I) species were prevalent, whereas the presence of trapping agents, like water or acetonitrile, allowed for the stabilization and isolation of octahedral TpRh(III) compounds. An excess of DMAD gave rise to a small amount of the [2+2+2] cyclotrimerization product hexamethyl mellitate (6). Although no catalytic application of 1 was achieved, mechanistic insights shed light on the formation of stable rhodium species representing the resting state of the catalytic cycle of rhodium-mediated [2+2+2] cyclo(co)trimerization reactions. Metallacyclopentene intermediate species, generated from the activation of one alkyne and one ethylene molecule from 1, and metallacyclopentadiene species, formed by oxidative coupling of two alkynes to the rhodium centre, are crucial steps in the pathways leading to the final organometallic and organic products.
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Affiliation(s)
- Giovanni Bottari
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Laura L Santos
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
| | - Cristina M Posadas
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Kurt Mereiter
- Department of Chemistry, Vienna University of Technology, Getreidemarkt 9/164SC, 1060, Vienna, Austria
| | - Margarita Paneque
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
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48
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Kang EH, Kang C, Yang S, Oks E, Choi TL. Mechanistic Investigations on the Competition between the Cyclopolymerization and [2 + 2 + 2] Cycloaddition of 1,6-Heptadiyne Derivatives Using Second-Generation Grubbs Catalysts. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01110] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Eun-Hye Kang
- Department
of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Cheol Kang
- Department
of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Sanghee Yang
- Department
of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Elina Oks
- Department
of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Tae-Lim Choi
- Department
of Chemistry, Seoul National University, Seoul 08826, Korea
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49
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Dahy AA, Koga N. Trimerization of Acetylene Catalyzed by Ir(PH2CH2CH2PH2)Cl(cod): A Computational Study. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20150391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- AbdelRahman A. Dahy
- Department of Chemistry, Faculty of Science, Assiut University
- Graduate School of Information Science, Nagoya University
| | - Nobuaki Koga
- Graduate School of Information Science, Nagoya University
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50
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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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