1
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Sahoo RK, Nembenna S. Zinc-Catalyzed Chemoselective Reduction of Nitriles to N-Silylimines through Hydrosilylation: Insights into the Reaction Mechanism. Inorg Chem 2023. [PMID: 37481732 DOI: 10.1021/acs.inorgchem.3c00309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
The N,N'-chelated conjugated bis-guanidinate (CBG) supported zinc hydride (Zn-1) pre-catalyzed highly challenging chemoselective mono-hydrosilylation of a wide range of nitriles to exclusive N-silylimines and/or N,N'-silyldiimines is reported. Furthermore, the effectiveness of pre-catalyst Zn-1 is compared with another pre-catalyst analogue, i.e., DiethylNacNac zinc hydride (Zn-2), to know the ligand effect. We observed that pre-catalyst Zn-1 shows high efficiency and better selectivity than pre-catalyst Zn-2 for reducing nitriles to N-silylimines. Mechanistic studies indicate the insertion of the C≡N bond of nitrile into Zn-H to form the zinc vinylidenamido complexes (Zn-1' and Zn-2'). The active catalysts Zn-1' and Zn-2' are confirmed by NMR, mass spectrometry, and single-crystal X-ray diffraction analyses. A most plausible catalytic cycle has been explored depending on stoichiometric experiments, active catalysts isolation, and in situ studies. Moreover, the synthetic utility of this protocol was demonstrated.
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Affiliation(s)
- Rajata Kumar Sahoo
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
| | - Sharanappa Nembenna
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Homi Bhabha National Institute (HBNI), Bhubaneswar 752 050, India
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2
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Rodríguez AM, Pérez-Ruíz J, Molina F, Poveda A, Pérez-Soto R, Maseras F, Díaz-Requejo MM, Pérez PJ. Introducing the Catalytic Amination of Silanes via Nitrene Insertion. J Am Chem Soc 2022; 144:10608-10614. [PMID: 35648453 PMCID: PMC9490852 DOI: 10.1021/jacs.2c03739] [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] [Indexed: 11/29/2022]
Abstract
![]()
The
direct functionalization
of Si–H bonds by the nitrene
insertion methodology is described. A copper(I) complex bearing a
trispyrazolylborate ligand catalyzes the transfer of a nitrene group
from PhI=NTs to the Si–H bond of silanes, disilanes,
and siloxanes, leading to the exclusive formation of Si–NH
moieties in the first example of this transformation. The process
tolerates other functionalities in the substrate such as several C–H
bonds and alkyne and alkene moieties directly bonded to the silicon
center. Density functional theory (DFT) calculations provide a mechanistic
interpretation consisting of a Si–H homolytic cleavage and
subsequent rebound to the Si-centered radical.
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Affiliation(s)
- Anabel M Rodríguez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, 21007 Huelva, Spain
| | - Jorge Pérez-Ruíz
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, 21007 Huelva, Spain
| | - Francisco Molina
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, 21007 Huelva, Spain
| | - Ana Poveda
- CICbioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | - Raúl Pérez-Soto
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007 Tarragona, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007 Tarragona, Spain
| | - M Mar Díaz-Requejo
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, 21007 Huelva, Spain
| | - Pedro J Pérez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química, Universidad de Huelva, 21007 Huelva, Spain
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3
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Muraoka T, Suzuki Y, Tsuchimoto M, Trigagema G, Ueno K, Koyama S. Synthesis and structure of a pyridine-stabilized silanone molybdenum complex and its reactions with PMe 3 and acetone. Dalton Trans 2022; 51:18203-18212. [DOI: 10.1039/d2dt02560d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The synthesis, structure and reactivity of a pyridine-stabilized silanone molybdenum complex are described.
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Affiliation(s)
- Takako Muraoka
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Yuzuki Suzuki
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masato Tsuchimoto
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Gama Trigagema
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Keiji Ueno
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Shinji Koyama
- Division of Mechanical Science and Technology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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4
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Abstract
The development of efficient methodologies for production of amines attracts significant attention from synthetic chemists, because amines serve as essential building blocks in the synthesis of many pharmaceuticals, natural products, and agrochemicals. In this regard, deoxygenative reduction of amides to amines by means of transition-metal-catalyzed hydrogenation, hydrosilylation, and hydroboration reactions represents an attractive alternative to conventional wasteful techniques based on stoichiometric reductions of the corresponding amides and imines, and reductive amination of aldehydes with metal hydride reagents. The relatively low electrophilicity of the amide carbonyl group makes this transformation more challenging compared to reduction of other carbonyl compounds, and the majority of the reported catalytic systems employ precious metals such as platinum, rhodium, iridium, and ruthenium. Despite the application of more abundant and environmentally benign base metal (Mn, Fe, Co, and Ni) complexes for deoxygenative reduction of amides have been developed to a lesser extent, such catalytic systems are of great importance. This review is focused on the current achievements in the base-metal-catalyzed deoxygenative hydrogenation, hydrosilylation, and hydroboration of amides to amines. Special attention is paid to the design of base metal catalysts and the mechanisms of such catalytic transformations.
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5
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Sanagawa A, Nagashima H. Hydrosilane Reduction of Nitriles to Primary Amines by Cobalt–Isocyanide Catalysts. Org Lett 2018; 21:287-291. [DOI: 10.1021/acs.orglett.8b03736] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Atsushi Sanagawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
| | - Hideo Nagashima
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan
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6
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Bezdek MJ, Chirik PJ. Proton-Coupled Electron Transfer to a Molybdenum Ethylene Complex Yields a β-Agostic Ethyl: Structure, Dynamics and Mechanism. J Am Chem Soc 2018; 140:13817-13826. [DOI: 10.1021/jacs.8b08460] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Máté J. Bezdek
- 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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7
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Ito M, Itazaki M, Nakazawa H. Selective Double Hydroboration and Dihydroborylsilylation of Organonitriles by an Iron–indium Cooperative Catalytic System. Inorg Chem 2017; 56:13709-13714. [DOI: 10.1021/acs.inorgchem.7b01369] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Masaki Ito
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Masumi Itazaki
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Nakazawa
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
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8
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Ito M, Itazaki M, Nakazawa H. Selective Double Hydrosilylation of Nitriles Catalyzed by an Iron Complex Containing Indium Trihalide. ChemCatChem 2016. [DOI: 10.1002/cctc.201600940] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Masaki Ito
- Department of Chemistry, Graduate School of Science; Osaka City University; Sumiyoshi-ku Osaka 558-8585 Japan
| | - Masumi Itazaki
- Department of Chemistry, Graduate School of Science; Osaka City University; Sumiyoshi-ku Osaka 558-8585 Japan
| | - Hiroshi Nakazawa
- Department of Chemistry, Graduate School of Science; Osaka City University; Sumiyoshi-ku Osaka 558-8585 Japan
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9
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Liao Q, Cavaillé A, Saffon-Merceron N, Mézailles N. Direct Synthesis of Silylamine from N2and a Silane: Mediated by a Tridentate Phosphine Molybdenum Fragment. Angew Chem Int Ed Engl 2016; 55:11212-6. [DOI: 10.1002/anie.201604812] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/24/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Qian Liao
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Anthony Cavaillé
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-FR2599; Université Paul Sabatier; 31062 Toulouse Cedex France
| | - Nicolas Mézailles
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
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10
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Liao Q, Cavaillé A, Saffon-Merceron N, Mézailles N. Direct Synthesis of Silylamine from N2and a Silane: Mediated by a Tridentate Phosphine Molybdenum Fragment. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604812] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qian Liao
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Anthony Cavaillé
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-FR2599; Université Paul Sabatier; 31062 Toulouse Cedex France
| | - Nicolas Mézailles
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier, CNRS; 118 Route de Narbonne 31062 Toulouse France
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11
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Asako S, Ishikawa S, Takai K. Synthesis of Linear Allylsilanes via Molybdenum-Catalyzed Regioselective Hydrosilylation of Allenes. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00627] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sobi Asako
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Sae Ishikawa
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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12
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McLeod NA, Kuzmina LG, Korobkov I, Howard JAK, Nikonov GI. Hydridosilylamido complexes of Ta and Mo isolobal with Berry's zirconocenes: syntheses, β-Si-H agostic interactions, catalytic hydrosilylation, and insight into mechanism. Dalton Trans 2016; 45:2554-61. [PMID: 26727669 DOI: 10.1039/c5dt04548g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The syntheses of novel Group 5 and Group 6 hydrosilylamido complexes of the type R(ArN[double bond, length as m-dash])M{N((t)Bu)SiMe2-H}X (M = Ta, R = Cp; M = Mo, R = ArN; X = Cl, H, OBn, Me) are described. The various substituents in the X position seem to play the key role in determining the extent of β-agostic interaction with the Si-H bond. The Mo agostic hydrido complex (ArN[double bond, length as m-dash])2Mo{η(3)-N((t)Bu)SiMe2-H}H is a pre-catalyst for the hydrosilylation of carbonyls. The stoichiometric reaction between benzaldehyde and (ArN[double bond, length as m-dash])2Mo{η(3)-N((t)Bu)SiMe2-H}H gives the benzoxy complex (ArN[double bond, length as m-dash])2Mo{N((t)Bu)SiMe2-H}(OBn), which showed a similar catalytic reactivity compared to the parent hydride. Mechanistic studies suggest that a non-hydride mechanism is operative.
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Affiliation(s)
- Nicolas A McLeod
- Chemistry Department, Brock University, Niagara Region, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada.
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13
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Khalimon AY, Farha PM, Nikonov GI. Imido–hydrido complexes of Mo(iv): catalysis and mechanistic aspects of hydroboration reactions. Dalton Trans 2015; 44:18945-56. [DOI: 10.1039/c5dt02945g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stoichiometric reaction of complexes (ArN)Mo(H)(Cl)(PMe3)3 (1) and (ArN)Mo(H)2(PMe3)3 (3) with nitriles and HBCat suggest that catalytic hydroboration reactions proceed via a series of agostic borylamido and borylamino complexes.
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Affiliation(s)
- Andrey Y. Khalimon
- Department of Chemistry
- Brock University
- St. Catharines
- Canada
- Department of Chemistry
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14
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Yang YF, Chung LW, Zhang X, Houk KN, Wu YD. Ligand-Controlled Reactivity, Selectivity, and Mechanism of Cationic Ruthenium-Catalyzed Hydrosilylations of Alkynes, Ketones, and Nitriles: A Theoretical Study. J Org Chem 2014; 79:8856-64. [DOI: 10.1021/jo501730n] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yun-Fang Yang
- Lab
of Computational Chemistry and Drug Design, Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Lung Wa Chung
- Department
of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Xinhao Zhang
- Lab
of Computational Chemistry and Drug Design, Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Yun-Dong Wu
- Lab
of Computational Chemistry and Drug Design, Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- College
of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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15
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Pal R, Groy TL, Bowman AC, Trovitch RJ. Preparation and Hydrosilylation Activity of a Molybdenum Carbonyl Complex That Features a Pentadentate Bis(imino)pyridine Ligand. Inorg Chem 2014; 53:9357-65. [DOI: 10.1021/ic501465v] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raja Pal
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Thomas L. Groy
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Amanda C. Bowman
- Department
of Chemistry, Transylvania University, Lexington, Kentucky 40508, United States
| | - Ryan J. Trovitch
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
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16
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Khalimon AY, McLeod NA, Ignatov SK, Okhapkin AI, Kuzmina LG, Howard JAK, Nikonov GI. Multiple coupling of silanes with imido complexes of Mo. Dalton Trans 2014; 43:8446-53. [PMID: 24740303 DOI: 10.1039/c4dt00154k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The bis(imido) complexes ((t)BuN[double bond, length as m-dash])2Mo(PMe3)(L) (L = PMe3, C2H4) react with up to three equivalents of silane PhSiH3 to give the imido-bridged disilyl silyl Mo(vi) complex ((t)BuN){μ-(t)BuN(SiHPh)2}Mo(H)(SiH2Ph)(PMe3)2 (3) studied by NMR, IR and X-ray diffraction. NMR data supported by DFT calculations show that complex 3 is an unusual example of a silyl hydride of Mo(VI), without significant SiH interaction. Mechanistic NMR studies revealed that silane addition proceeds in a stepwise manner via a series of Si-H∙∙∙M agostic and silanimine complexes whose structures were further elucidated by DFT calculations.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Ave., St. Catharines, ON L2S 3A1, Canada.
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17
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18
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La Pierre HS, Minasian SG, Abubekerov M, Kozimor SA, Shuh DK, Tyliszczak T, Arnold J, Bergman RG, Toste FD. Vanadium Bisimide Bonding Investigated by X-ray Crystallography, 51V and 13C Nuclear Magnetic Resonance Spectroscopy, and V L3,2-Edge X-ray Absorption Near-Edge Structure Spectroscopy. Inorg Chem 2013; 52:11650-60. [DOI: 10.1021/ic4020543] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Henry S. La Pierre
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Stefan G. Minasian
- Inorganic,
Isotope and Actinide Chemistry, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mark Abubekerov
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Stosh A. Kozimor
- Inorganic,
Isotope and Actinide Chemistry, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - David K. Shuh
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Tolek Tyliszczak
- Chemical
Sciences Division and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - John Arnold
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Robert G. Bergman
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - F. Dean Toste
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
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19
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Khalimon AY, Ignatov SK, Okhapkin AI, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Unusual structure, fluxionality, and reaction mechanism of carbonyl hydrosilylation by silyl hydride complex [(ArN=)Mo(H)(SiH2Ph)(PMe3)3]. Chemistry 2013; 19:8573-90. [PMID: 23671027 DOI: 10.1002/chem.201300376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 11/12/2022]
Abstract
The reactions of bis(borohydride) complexes [(RN=)Mo(BH4)2(PMe3)2] (4: R = 2,6-Me2C6H3; 5: R = 2,6-iPr2C6H3) with hydrosilanes afford new silyl hydride derivatives [(RN=)Mo(H)(SiR'3)(PMe3)3] (3: R = Ar, R'3 = H2Ph; 8: R = Ar', R'3 = H2Ph; 9: R = Ar, R'3 = (OEt)3; 10: R = Ar, R'3 = HMePh). These compounds can also be conveniently prepared by reacting [(RN=)Mo(H)(Cl)(PMe3)3] with one equivalent of LiBH4 in the presence of a silane. Complex 3 undergoes intramolecular and intermolecular phosphine exchange, as well as exchange between the silyl ligand and the free silane. Kinetic and DFT studies show that the intermolecular phosphine exchange occurs through the predissociation of a PMe3 group, which, surprisingly, is facilitated by the silane. The intramolecular exchange proceeds through a new non-Bailar-twist pathway. The silyl/silane exchange proceeds through an unusual Mo(VI) intermediate, [(ArN=)Mo(H)2(SiH2Ph)2(PMe3)2] (19). Complex 3 was found to be the catalyst of a variety of hydrosilylation reactions of carbonyl compounds (aldehydes and ketones) and nitriles, as well as of silane alcoholysis. Stoichiometric mechanistic studies of the hydrosilylation of acetone, supported by DFT calculations, suggest the operation of an unexpected mechanism, in that the silyl ligand of compound 3 plays an unusual role as a spectator ligand. The addition of acetone to compound 3 leads to the formation of [trans-(ArN)Mo(OiPr)(SiH2Ph)(PMe3)2] (18). This latter species does not undergo the elimination of a Si-O group (which corresponds to the conventional Ojima's mechanism of hydrosilylation). Rather, complex 18 undergoes unusual reversible β-CH activation of the isopropoxy ligand. In the hydrosilylation of benzaldehyde, the reaction proceeds through the formation of a new intermediate bis(benzaldehyde) adduct, [(ArN=)Mo(η(2)-PhC(O)H)2(PMe3)], which reacts further with hydrosilane through a η(1)-silane complex, as studied by DFT calculations.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada
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20
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La Pierre HS, Arnold J, Bergman RG, Toste FD. Carbon Monoxide, Isocyanide, and Nitrile Complexes of Cationic, d0 Vanadium Bisimides: π-Back Bonding Derived from the π Symmetry, Bonding Metal Bisimido Ligand Orbitals. Inorg Chem 2012. [DOI: 10.1021/ic302044q] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Henry S. La Pierre
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - Robert G. Bergman
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
| | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United
States
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21
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Khalimon AY, Sherbrooke O, Peterson E, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Mechanistic aspects of hydrosilylation catalyzed by (ArN=)Mo(H)(Cl)(PMe3)3. Inorg Chem 2012; 51:4300-13. [PMID: 22435952 DOI: 10.1021/ic300010c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of (ArN=)MoCl(2)(PMe(3))(3) (Ar = 2,6-diisopropylphenyl) with L-Selectride gives the hydrido-chloride complex (ArN=)Mo(H)(Cl)(PMe(3))(3) (2). Complex 2 was found to catalyze the hydrosilylation of carbonyls and nitriles as well as the dehydrogenative silylation of alcohols and water. Compound 2 does not show any productive reaction with PhSiH(3); however, a slow H/D exchange and formation of (ArN=)Mo(D)(Cl)(PMe(3))(3) (2(D)) was observed upon addition of PhSiD(3). Reactivity of 2 toward organic substrates was studied. Stoichiometric reactions of 2 with benzaldehyde and cyclohexanone start with dissociation of the trans-to-hydride PMe(3) ligand followed by coordination and insertion of carbonyls into the Mo-H bond to form alkoxy derivatives (ArN=)Mo(Cl)(OR)(PMe(2))L(2) (3: R = OCH(2)Ph, L(2) = 2 PMe(3); 5: R = OCH(2)Ph, L(2) = η(2)-PhC(O)H; 6: R = OCy, L(2) = 2 PMe(3)). The latter species reacts with PhSiH(3) to furnish the corresponding silyl ethers and to recover the hydride 2. An analogous mechanism was suggested for the dehydrogenative ethanolysis with PhSiH(3), with the key intermediate being the ethoxy complex (ArN=)Mo(Cl)(OEt)(PMe(3))(3) (7). In the case of hydrosilylation of acetophenone, a D-labeling experiment, i.e., a reaction of 2 with acetophenone and PhSiD(3) in the 1:1:1 ratio, suggests an alternative mechanism that does not involve the intermediacy of an alkoxy complex. In this particular case, the reaction presumably proceeds via Lewis acid catalysis. Similar to the case of benzaldehyde, treatment of 2 with styrene gives trans-(ArN=)Mo(H)(η(2)-CH(2)═CHPh)(PMe(3))(2) (8). Complex 8 slowly decomposes via the release of ethylbenzene, indicating only a slow insertion of styrene ligand into the Mo-H bond of 8.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
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Khalimon AY, Simionescu R, Nikonov GI. Catalytic and Stoichiometric Reactivity of β-Silylamido Agostic Complex of Mo: Intermediacy of a Silanimine Complex and Applications to Multicomponent Coupling. J Am Chem Soc 2011; 133:7033-53. [DOI: 10.1021/ja111005r] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Andrey Y. Khalimon
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada
| | - Razvan Simionescu
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada
| | - Georgii I. Nikonov
- Department of Chemistry, Brock University, St Catharines, Ontario L2S 3A1, Canada
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La Pierre HS, Arnold J, Toste FD. Z-Selective Semihydrogenation of Alkynes Catalyzed by a Cationic Vanadium Bisimido Complex. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007876] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Z-Selective Semihydrogenation of Alkynes Catalyzed by a Cationic Vanadium Bisimido Complex. Angew Chem Int Ed Engl 2011; 50:3900-3. [DOI: 10.1002/anie.201007876] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 02/07/2011] [Indexed: 11/07/2022]
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Cui H, Cui C. Synthesis of a Base‐Stabilized 1‐Hydrosilanimine via NHC‐Mediated Dehydrohalogenation of Hydrochlorosilane. Chem Asian J 2011; 6:1138-41. [DOI: 10.1002/asia.201100022] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Haiyan Cui
- State Key Laboratory of Elemento‐organic Chemistry, Nankai University, Tianjin, 300071 (China), Fax: (+86)‐22‐23503461
| | - Chunming Cui
- State Key Laboratory of Elemento‐organic Chemistry, Nankai University, Tianjin, 300071 (China), Fax: (+86)‐22‐23503461
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Corey JY. Reactions of hydrosilanes with transition metal complexes and characterization of the products. Chem Rev 2011; 111:863-1071. [PMID: 21250634 DOI: 10.1021/cr900359c] [Citation(s) in RCA: 353] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joyce Y Corey
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, 63121, USA.
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27
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Gutsulyak DV, van der Est A, Nikonov GI. Facile Catalytic Hydrosilylation of Pyridines. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006135] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Gutsulyak DV, van der Est A, Nikonov GI. Facile Catalytic Hydrosilylation of Pyridines. Angew Chem Int Ed Engl 2011; 50:1384-7. [DOI: 10.1002/anie.201006135] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Indexed: 11/08/2022]
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29
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Shiotsuki M, Sanda F, Masuda T. Polymerization of substituted acetylenes and features of the formed polymers. Polym Chem 2011. [DOI: 10.1039/c0py00333f] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This review summarizes the recent advances of substituted polyacetylene chemistry, including new polymerization catalysts and the properties and functions of the polymers.
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Affiliation(s)
- Masashi Shiotsuki
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University Katsura Campus
- Kyoto
- Japan
| | - Fumio Sanda
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University Katsura Campus
- Kyoto
- Japan
| | - Toshio Masuda
- Department of Environmental and Biological Chemistry
- Faculty of Engineering
- Fukui University of Technology
- Fukui
- Japan
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Komuro T, Begum R, Ono R, Tobita H. Synthesis and characterisation of hydrido molybdenum and tungsten complexes having a hemilabile tridentate Si,Si,O-ligand: observation of stepwise hydrosilylation of a nitrile to form an N-silylimine on the metal centre. Dalton Trans 2011; 40:2348-57. [DOI: 10.1039/c0dt01047b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Sherbrooke O, Gorelsky SI, Simionescu R, Kuzmina LG, Nikonov GI. The unexpected mechanism of carbonyl hydrosilylation catalyzed by (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)). Chem Commun (Camb) 2010; 46:7831-7833. [PMID: 20856991 DOI: 10.1039/c0cc01850c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Complex (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)) (2, Ar = 2,6-diisopropylphenyl) catalyzes the hydrosilylation of carbonyls by an unexpected associative mechanism. Complex 2 also reacts with PhSiH(3) by a σ-bond metathesis mechanism to give the silyl derivative (Cp)(ArN[double bond, length as m-dash])Mo(SiH(2)Ph)(PMe(3)).
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Affiliation(s)
- Oleg Sherbrooke
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Serge I Gorelsky
- Center for Catalysis Research and Innovation, University of Ottawa, 30 Marie Curie Street, Ottawa, ON, Canada, K1N 6N5.
| | - Razvan Simionescu
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Lyudmila G Kuzmina
- Kurnakov Institute of General and Inorganic Chemistry, 31 Leninsky prospect, Moscow, 119991, Russia.
| | - Georgii I Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
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Chen Y, Song H, Cui C. Dehydrosilylation of ArNHSiH3 with Ytterbium(II) Amide: Formation of a Dimeric Ytterbium(II) Silanimine Complex. Angew Chem Int Ed Engl 2010; 49:8958-61. [DOI: 10.1002/anie.201004856] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Chen Y, Song H, Cui C. Dehydrosilylation of ArNHSiH3 with Ytterbium(II) Amide: Formation of a Dimeric Ytterbium(II) Silanimine Complex. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Gutsulyak DV, Nikonov GI. Chemoselective Catalytic Hydrosilylation of Nitriles. Angew Chem Int Ed Engl 2010; 49:7553-6. [DOI: 10.1002/anie.201003069] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Gutsulyak DV, Nikonov GI. Chemoselective Catalytic Hydrosilylation of Nitriles. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003069] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Putzien S, Nuyken O, Kühn FE. Functionalized polysilalkylene siloxanes (polycarbosiloxanes) by hydrosilylation—Catalysis and synthesis. Prog Polym Sci 2010. [DOI: 10.1016/j.progpolymsci.2010.01.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Calimano E, Tilley TD. Synthesis and Structure of PNP-Supported Iridium Silyl and Silylene Complexes: Catalytic Hydrosilation of Alkenes. J Am Chem Soc 2009; 131:11161-73. [DOI: 10.1021/ja903737j] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elisa Calimano
- Department of Chemistry, University of California, Berkeley, California 94720
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, California 94720
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Leelasubcharoen S, Zhizhko PA, Kuzmina LG, Churakov AV, Howard JAK, Nikonov GI. Niobium/Rhodium Bimetallic Complexes: Synthesis, Structure, and Catalytic Hydrosilylation of Acetophenone and Benzaldehyde. Organometallics 2009. [DOI: 10.1021/om900363r] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Somying Leelasubcharoen
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada
| | - Pavel A. Zhizhko
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada
| | - Lyudmila G. Kuzmina
- Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, 119991 Moscow, Russian Federation
| | - Andrei V. Churakov
- Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, 119991 Moscow, Russian Federation
| | | | - Georgii I. Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, L2S 3A1, Ontario, Canada
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Ignatov SK, Khalimon AY, Rees NH, Razuvaev AG, Mountford P, Nikonov GI. β-Agostic Silylamido and Silyl-Hydrido Compounds of Molybdenum and Tungsten. Inorg Chem 2009; 48:9605-22. [DOI: 10.1021/ic900591e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stanislav K. Ignatov
- Department of Chemistry, Nizhnii Novgorod State University, Gagarin Avenue 23, 603600 Nizhny Novgorod, Russia
| | - Andrey Y. Khalimon
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Nicholas H. Rees
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Alexei G. Razuvaev
- Department of Chemistry, Nizhnii Novgorod State University, Gagarin Avenue 23, 603600 Nizhny Novgorod, Russia
| | - Philip Mountford
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Georgii I. Nikonov
- Department of Chemistry, Brock University, St. Catharines, ON L2S 3A1, Canada
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40
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Peterson E, Khalimon AY, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Diversity of Catalysis by an Imido-Hydrido Complex of Molybdenum. Mechanism of Carbonyl Hydrosilylation and Silane Alcoholysis. J Am Chem Soc 2008; 131:908-9. [DOI: 10.1021/ja8085388] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erik Peterson
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
| | - Andrey Y. Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
| | - Razvan Simionescu
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
| | - Lyudmila G. Kuzmina
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
| | - Judith A. K. Howard
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
| | - Georgii I. Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada, N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii prospect, Moscow, 119991, Russia, and Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
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