1
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Köring L, Stepen A, Birenheide B, Barth S, Leskov M, Schoch R, Krämer F, Breher F, Paradies J. Boron-Centered Lewis Superacid through Redox-Active Ligands: Application in C-F and S-F Bond Activation. Angew Chem Int Ed Engl 2023; 62:e202216959. [PMID: 36621900 DOI: 10.1002/anie.202216959] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/04/2023] [Accepted: 01/04/2023] [Indexed: 01/10/2023]
Abstract
A series of redox-responsive ferrocenyl-substituted boranes and boronic esters were synthesized. Oxidation of the ferrocenyl ligand to the ferrocenium resulted in a drastic increase in the Lewis acidity beyond the strength of SbF5 , which was investigated experimentally and computationally. The resulting highly Lewis acidic boron compounds were used for catalytic C-F and S-F bond activation.
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Affiliation(s)
- Laura Köring
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Arne Stepen
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Bernhard Birenheide
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Simon Barth
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Maxim Leskov
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Roland Schoch
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany
| | - Jan Paradies
- Department of Chemistry, Paderborn University, Warburger Strasse 100, 33098, Paderborn, Germany
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2
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Sorochkina K, Chernichenko K, Zhivonitko VV, Nieger M, Repo T. Water Reduction and Dihydrogen Addition in Aqueous Conditions With ansa-Phosphinoborane. Chemistry 2022; 28:e202201927. [PMID: 35861909 PMCID: PMC9804508 DOI: 10.1002/chem.202201927] [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: 06/22/2022] [Indexed: 01/05/2023]
Abstract
Ortho-phenylene-bridged phosphinoborane (2,6-Cl2 Ph)2 B-C6 H4 -PCy2 1 was synthesized in three steps from commercially available starting materials. 1 reacts with H2 or H2 O under mild conditions to form corresponding zwitterionic phosphonium borates 1-H2 or 1-H2 O. NMR studies revealed both reactions to be remarkably reversible. Thus, when exposed to H2 , 1-H2 O partially converts to 1-H2 even in the presence of multiple equivalents of water in the solution. The addition of parahydrogen to 1 leads to nuclear spin hyperpolarization both in dry and hydrous solvents, confirming the dissociation of 1-H2 O to free 1. These observations were supported by computational studies indicating that the formation of 1-H2 and 1-H2 O from 1 are thermodynamically favored. Unexpectedly, 1-H2 O can release molecular hydrogen to form phosphine oxide 1-O. Kinetic, mechanistic, and computational (DFT) studies were used to elucidate the unique "umpolung" water reduction mechanism.
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Affiliation(s)
- Kristina Sorochkina
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
| | - Konstantin Chernichenko
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
- Chemical Process Research and Development Janssen PharmaceuticaTurnhoutseweg 302340BeerseBelgium
| | | | - Martin Nieger
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
| | - Timo Repo
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
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3
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Han C, Meng W, Feng X, Du H. Asymmetric Intramolecular Hydroalkoxylation of 2‐Vinylbenzyl Alcohols with Chiral Boro‐Phosphates. Angew Chem Int Ed Engl 2022; 61:e202200100. [DOI: 10.1002/anie.202200100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Caifang Han
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wei Meng
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiangqing Feng
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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4
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Asymmetric Intramolecular Hydroalkoxylation of 2‐Vinylbenzyl Alcohols with Chiral Boro‐Phosphates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200100] [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]
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5
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Zakharov DO, Chernichenko K, Sorochkina K, Yang S, Telkki V, Repo T, Zhivonitko VV. Parahydrogen-Induced Polarization in Hydrogenation Reactions Mediated by a Metal-Free Catalyst. Chemistry 2022; 28:e202103501. [PMID: 34928532 PMCID: PMC9303582 DOI: 10.1002/chem.202103501] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Indexed: 11/28/2022]
Abstract
We report nuclear spin hyperpolarization of various alkenes achieved in alkyne hydrogenations with parahydrogen over a metal-free hydroborane catalyst (HCAT). Being an intramolecular frustrated Lewis pair aminoborane, HCAT utilizes a non-pairwise mechanism of H2 transfer to alkynes that normally prevents parahydrogen-induced polarization (PHIP) from being observed. Nevertheless, the specific spin dynamics in catalytic intermediates leads to the hyperpolarization of predominantly one hydrogen in alkene. PHIP enabled the detection of important HCAT-alkyne-H2 intermediates through substantial 1 H, 11 B and 15 N signal enhancement and allowed advanced characterization of the catalytic process.
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Affiliation(s)
| | - Konstantin Chernichenko
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
- Present address: Discovery, Product Development & Supply (DPDS)Janssen Pharmaceutical Companies of Johnson & JohnsonTurnhoutseweg 302340BeerseBelgium
| | - Kristina Sorochkina
- NMR Research UnitUniversity of OuluP.O. Box 300090014OuluFinland
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
| | - Shengjun Yang
- NMR Research UnitUniversity of OuluP.O. Box 300090014OuluFinland
| | | | - Timo Repo
- Department of ChemistryUniversity of HelsinkiA. I. Virtasen aukio 100014HelsinkiFinland
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6
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Bai D, Wu F, Chang L, Wang M, Wu H, Chang J. Highly Regio‐ and Enantioselective Hydrosilylation of
gem
‐Difluoroalkenes by Nickel Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dachang Bai
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 P.R. China
| | - Fen Wu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Lingna Chang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Manman Wang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Hao Wu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Junbiao Chang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
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7
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Bai D, Wu F, Chang L, Wang M, Wu H, Chang J. Highly Regio- and Enantioselective Hydrosilylation of gem-Difluoroalkenes via Nickel Catalysis. Angew Chem Int Ed Engl 2021; 61:e202114918. [PMID: 34957676 DOI: 10.1002/anie.202114918] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Indexed: 11/10/2022]
Abstract
The synthesis of small organic molecules with a difluoromethylated stereocenter is particularly attractive in drug discovery. Herein, we developed an efficient method for the direct generation of difluoromethylated stereocenters through Ni(0)-catalyzed regio - and enantioselective hydrosilylation of gem -difluoroalkenes. The reaction also represents the enantioselective construction of carbon(sp 3 )-silicon bonds with nickel catalysis, which provides an atom- and step-economical synthesis route of high-value optically active α-difluoromethylsilanes. This protocol features with readily available starting materials and commercial chiral catalysis, broad substrates spanning a range of functional groups with high yield (up to 99% yield) and excellent enantioselectivity (up to 96% ee). The enantioenriched products undergo a variety of stereospecific transformations. Preliminary mechanistic studies were performed.
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Affiliation(s)
- Dachang Bai
- Henan Normal University, school of chemistry and chemical engineering, 46# jianshe road, 456007, xinxiang, CHINA
| | - Fen Wu
- Henan Normal University, School of Chemistry and Chemical Engineering, CHINA
| | - Lingna Chang
- Henan Normal University, School of Chemistry and Chemical Engineering, CHINA
| | - Manman Wang
- Henan Normal University, School of Chemistry and Chemical Engineering, CHINA
| | - Hao Wu
- Henan Normal University, School of Chemistry and Chemical Engineering, CHINA
| | - Junbiao Chang
- Henan Normal University, School of Chemistry and Chemical Engineering, CHINA
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8
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Lemière G, Millanvois A, Ollivier C, Fensterbank L. A Parisian Vision of the Chemistry of Hypercoordinated Silicon Derivatives. CHEM REC 2021; 21:1119-1129. [PMID: 33735507 DOI: 10.1002/tcr.202100049] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/05/2021] [Indexed: 01/08/2023]
Abstract
Less than ten years of acquaintance with hypercoordinated silicon derivatives in our lab is described in this account. Martin's spirosilane derivatives open new opportunities as ligands and as agents for the activation of small molecules and bis-catecholato silicates have proven to be exquisite radical precursors in photoredox conditions for broad synthetic applications.
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Affiliation(s)
- Gilles Lemière
- Institut Parisien de Chimie Moléculaire, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris
| | - Alexandre Millanvois
- Institut Parisien de Chimie Moléculaire, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris
| | - Cyril Ollivier
- Institut Parisien de Chimie Moléculaire, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris
| | - Louis Fensterbank
- Institut Parisien de Chimie Moléculaire, Sorbonne Université, CNRS, 4 place Jussieu, 75005, Paris
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9
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Gao B, Feng X, Meng W, Du H. Asymmetric Hydrogenation of Ketones and Enones with Chiral Lewis Base Derived Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2020; 59:4498-4504. [PMID: 31863715 DOI: 10.1002/anie.201914568] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Indexed: 01/13/2023]
Abstract
The concept of frustrated Lewis pairs (FLPs) has been widely applied in various research areas, and metal-free hydrogenation undoubtedly belongs to the most significant and successful ones. In the past decade, great efforts have been devoted to the synthesis of chiral boron Lewis acids. In a sharp contrast, chiral Lewis base derived FLPs have rarely been disclosed for the asymmetric hydrogenation. In this work, a novel type of chiral FLP was developed by simple combination of chiral oxazoline Lewis bases with achiral boron Lewis acids, thus providing a promising new direction for the development of chiral FLPs in the future. These chiral FLPs proved to be highly effective for the asymmetric hydrogenation of ketones, enones, and chromones, giving the corresponding products in high yields with up to 95 % ee. Mechanistic studies suggest that the hydrogen transfer to simple ketones likely proceeds in a concerted manner.
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Affiliation(s)
- Bochao Gao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangqing Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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10
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Gao B, Feng X, Meng W, Du H. Asymmetric Hydrogenation of Ketones and Enones with Chiral Lewis Base Derived Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914568] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Bochao Gao
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
- School of Chemical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Xiangqing Feng
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
- School of Chemical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Wei Meng
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
- School of Chemical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
| | - Haifeng Du
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
- School of Chemical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 China
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11
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Lv S, Zhang G, Chen J, Gao W. Electrochemical Dearomatization: Evolution from Chemicals to Traceless Electrons. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900750] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shide Lv
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Pharmaceutical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
| | - Guofeng Zhang
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Pharmaceutical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
| | - Jianbin Chen
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Pharmaceutical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
| | - Wei Gao
- Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Pharmaceutical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 People's Republic of China
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12
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Medici F, Maury J, Lemière G, Fensterbank L. Interaction between Spirosilanes and Lewis Bases: from Coordination to Frustration. Chemistry 2019; 25:9438-9442. [DOI: 10.1002/chem.201901355] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Fabrizio Medici
- CNRSInstitut Parisien de Chimie MoléculaireSorbonne Universite 4 Place Jussieu, CC 229 75252 Paris Cedex 05 France
| | - Julien Maury
- CNRSInstitut Parisien de Chimie MoléculaireSorbonne Universite 4 Place Jussieu, CC 229 75252 Paris Cedex 05 France
| | - Gilles Lemière
- CNRSInstitut Parisien de Chimie MoléculaireSorbonne Universite 4 Place Jussieu, CC 229 75252 Paris Cedex 05 France
| | - Louis Fensterbank
- CNRSInstitut Parisien de Chimie MoléculaireSorbonne Universite 4 Place Jussieu, CC 229 75252 Paris Cedex 05 France
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13
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Zwettler N, Mösch-Zanetti NC. Interaction of Metal Oxido Compounds with B(C 6 F 5 ) 3. Chemistry 2019; 25:6064-6076. [PMID: 30707470 DOI: 10.1002/chem.201805148] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Indexed: 11/07/2022]
Abstract
Lewis acid-base pair chemistry has been placed on a new level with the discovery that adduct formation between an electron donor (Lewis base) and acceptor (Lewis acid) can be inhibited by the introduction of steric demand, thus preserving the reactivity of both Lewis centers, resulting in highly unusual chemistry. Some of these highly versatile frustrated Lewis pairs (FLP) are capable of splitting a variety of small molecules, such as dihydrogen, in a heterolytic and even catalytic manner. This is in sharp contrast to classical reactions where the inert substrate must be activated by a metal-based catalyst. Very recently, research has emerged combining the two concepts, namely the formation of FLPs in which a metal compound represents the Lewis base, allowing for novel chemistry by using the heterolytic splitting power of both together with the redox reactivity of the metal. Such reactivity is not restricted to the metal center itself being a Lewis acid or base, also ancillary ligands can be used as part of the Lewis pair, still with the benefit of the redox-active metal center nearby. This Minireview is designed to highlight the novel reactions arising from the combination of metal oxido transition-metal or rare-earth-metal compounds with the Lewis acid B(C6 F5 )3 . It covers a wide area of chemistry including small molecule activation, hydrogenation and hydrosilylation catalysis, and olefin metathesis, substantiating the broad influence of the novel concept. Future goals of this young and exciting area are briefly discussed.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry/Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010, Graz, Austria
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry/Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010, Graz, Austria
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14
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Niu Z, Zhang W, Lan PC, Aguila B, Ma S. Promoting Frustrated Lewis Pairs for Heterogeneous Chemoselective Hydrogenation via the Tailored Pore Environment within Metal–Organic Frameworks. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903763] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zheng Niu
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Weijie Zhang
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Pui Ching Lan
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Briana Aguila
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Shengqian Ma
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
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15
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Niu Z, Zhang W, Lan PC, Aguila B, Ma S. Promoting Frustrated Lewis Pairs for Heterogeneous Chemoselective Hydrogenation via the Tailored Pore Environment within Metal–Organic Frameworks. Angew Chem Int Ed Engl 2019; 58:7420-7424. [DOI: 10.1002/anie.201903763] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Zheng Niu
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Weijie Zhang
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Pui Ching Lan
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Briana Aguila
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
| | - Shengqian Ma
- Department Department of Chemistry University of South Florida 4202 E. Fowler Avenue Tampa FL 33620 USA
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16
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Elliott DC, Marti A, Mauleón P, Pfaltz A. H
2
Activation by Non‐Transition‐Metal Systems: Hydrogenation of Aldimines and Ketimines with LiN(SiMe
3
)
2. Chemistry 2019; 25:1918-1922. [DOI: 10.1002/chem.201805549] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel C. Elliott
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
| | - Alex Marti
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
| | - Pablo Mauleón
- Department of Organic ChemistryUniversidad Autónoma de Madrid c/ Fco. Tomás y Valiente 7, Cantoblanco 28049 Madrid Spain
| | - Andreas Pfaltz
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
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17
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Cabrera-Trujillo JJ, Fernández I. Influence of the Lewis Acid/Base Pairs on the Reactivity of Geminal E-CH2
-E′ Frustrated Lewis Pairs. Chemistry 2018; 24:17823-17831. [DOI: 10.1002/chem.201804198] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Jorge Juan Cabrera-Trujillo
- Departamento de Química Orgánica I and; Centro de Innovación en Química Avanzada (ORFEO-CINQA); Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040- Madrid Spain
| | - Israel Fernández
- Departamento de Química Orgánica I and; Centro de Innovación en Química Avanzada (ORFEO-CINQA); Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040- Madrid Spain
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18
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Ding Y, Huang X, Yi X, Qiao Y, Sun X, Zheng A, Su DS. A Heterogeneous Metal‐Free Catalyst for Hydrogenation: Lewis Acid–Base Pairs Integrated into a Carbon Lattice. Angew Chem Int Ed Engl 2018; 57:13800-13804. [DOI: 10.1002/anie.201803977] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/10/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Yuxiao Ding
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Xing Huang
- Fritz-Haber-Institut der Max-Planck Gesellschaft 14195 Berlin Germany
| | - Xianfeng Yi
- Wuhan Institute of Physics and MathematicsChinese Academy of Sciences 430071 Wuhan China
| | - Yunxiang Qiao
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Xiaoyan Sun
- Department of ChemistryTechnische Universität Berlin 10623 Berlin Germany
| | - Anmin Zheng
- Wuhan Institute of Physics and MathematicsChinese Academy of Sciences 430071 Wuhan China
| | - Dang Sheng Su
- Fritz-Haber-Institut der Max-Planck Gesellschaft 14195 Berlin Germany
- Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of Sciences 116023 Dalian China
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19
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Mummadi S, Brar A, Wang G, Kenefake D, Diaz R, Unruh DK, Li S, Krempner C. “Inverse” Frustrated Lewis Pairs: An Inverse FLP Approach to the Catalytic Metal Free Hydrogenation of Ketones. Chemistry 2018; 24:16526-16531. [DOI: 10.1002/chem.201804370] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Suresh Mummadi
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
| | - Amandeep Brar
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
| | - Guoqiang Wang
- School of Chemistry and Chemical Engineering Institute of Theoretical and Computational Chemistry Nanjing University Xianlin Road No. 163 210023 Nanjing Jiangsu P. R. China
| | - Dustin Kenefake
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
| | - Rony Diaz
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
| | - Daniel K. Unruh
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
| | - Shuhua Li
- School of Chemistry and Chemical Engineering Institute of Theoretical and Computational Chemistry Nanjing University Xianlin Road No. 163 210023 Nanjing Jiangsu P. R. China
| | - Clemens Krempner
- Department of Chemistry & Biochemistry Texas Tech University, Box 41061 Lubbock Texas 79409-1061 USA
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20
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Affiliation(s)
- Jan Paradies
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
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21
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Maier AFG, Tussing S, Zhu H, Wicker G, Tzvetkova P, Flörke U, Daniliuc CG, Grimme S, Paradies J. Borane-Catalyzed Synthesis of Quinolines Bearing Tetrasubstituted Stereocenters by Hydride Abstraction-Induced Electrocyclization. Chemistry 2018; 24:16287-16291. [DOI: 10.1002/chem.201804777] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Indexed: 12/24/2022]
Affiliation(s)
- Alexander F. G. Maier
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Sebastian Tussing
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Hui Zhu
- Mulliken Center for Theoretical Chemistry; University of Bonn; Beringstr. 4 53115 Bonn Germany
| | - Garrit Wicker
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Pavleta Tzvetkova
- Institute of Organic Chemistry and Institute for Biological Interfaces-4; Karlsruhe Institute of Technology (KIT); Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Ulrich Flörke
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
| | - Constantin G. Daniliuc
- Institute of Organic Chemistry; University of Münster; Corrensstrasse 40 48149 Münster Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry; University of Bonn; Beringstr. 4 53115 Bonn Germany
| | - Jan Paradies
- Department of Chemistry; University of Paderborn; Warburger Strasse 100 33098 Paderborn Germany
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22
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Khan I, Reed‐Berendt BG, Melen RL, Morrill LC. FLP-Catalyzed Transfer Hydrogenation of Silyl Enol Ethers. Angew Chem Int Ed Engl 2018; 57:12356-12359. [PMID: 30106498 PMCID: PMC6207922 DOI: 10.1002/anie.201808800] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Indexed: 01/08/2023]
Abstract
Herein we report the first catalytic transfer hydrogenation of silyl enol ethers. This metal free approach employs tris(pentafluorophenyl)borane and 2,2,6,6-tetramethylpiperidine (TMP) as a commercially available FLP catalyst system and naturally occurring γ-terpinene as a dihydrogen surrogate. A variety of silyl enol ethers undergo efficient hydrogenation, with the reduced products isolated in excellent yields (29 examples, 82 % average yield).
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Affiliation(s)
- Imtiaz Khan
- School of ChemistryCardiff UniversityMain BuildingPark PlaceCardiffCF10 3ATUK
| | | | - Rebecca L. Melen
- School of ChemistryCardiff UniversityMain BuildingPark PlaceCardiffCF10 3ATUK
| | - Louis C. Morrill
- School of ChemistryCardiff UniversityMain BuildingPark PlaceCardiffCF10 3ATUK
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23
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24
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Zhou Q, Meng W, Yang J, Du H. A Continuously Regenerable Chiral Ammonia Borane for Asymmetric Transfer Hydrogenations. Angew Chem Int Ed Engl 2018; 57:12111-12115. [DOI: 10.1002/anie.201806877] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Qiwen Zhou
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- State Key Laboratory of Chemical Resource Engineering; Beijing Key Laboratory of Bioprocess; College of Life Sciences and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wei Meng
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Jing Yang
- State Key Laboratory of Chemical Resource Engineering; Beijing Key Laboratory of Bioprocess; College of Life Sciences and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
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25
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Zhou Q, Meng W, Yang J, Du H. A Continuously Regenerable Chiral Ammonia Borane for Asymmetric Transfer Hydrogenations. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806877] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Qiwen Zhou
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
- State Key Laboratory of Chemical Resource Engineering; Beijing Key Laboratory of Bioprocess; College of Life Sciences and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Wei Meng
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Jing Yang
- State Key Laboratory of Chemical Resource Engineering; Beijing Key Laboratory of Bioprocess; College of Life Sciences and Technology; Beijing University of Chemical Technology; Beijing 100029 China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Molecular Recognition and Function; CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
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26
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Ding Y, Huang X, Yi X, Qiao Y, Sun X, Zheng A, Su DS. A Heterogeneous Metal‐Free Catalyst for Hydrogenation: Lewis Acid–Base Pairs Integrated into a Carbon Lattice. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803977] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuxiao Ding
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Xing Huang
- Fritz-Haber-Institut der Max-Planck Gesellschaft 14195 Berlin Germany
| | - Xianfeng Yi
- Wuhan Institute of Physics and MathematicsChinese Academy of Sciences 430071 Wuhan China
| | - Yunxiang Qiao
- Max-Planck-Institut für Chemische Energiekonversion Stiftstraße 34–36 45470 Mülheim an der Ruhr Germany
| | - Xiaoyan Sun
- Department of ChemistryTechnische Universität Berlin 10623 Berlin Germany
| | - Anmin Zheng
- Wuhan Institute of Physics and MathematicsChinese Academy of Sciences 430071 Wuhan China
| | - Dang Sheng Su
- Fritz-Haber-Institut der Max-Planck Gesellschaft 14195 Berlin Germany
- Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of Sciences 116023 Dalian China
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27
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Yepes D, Jaque P, Fernández I. Hydrogenation of Multiple Bonds by Geminal Aminoborane-Based Frustrated Lewis Pairs. Chemistry 2018; 24:8833-8840. [DOI: 10.1002/chem.201800864] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Diana Yepes
- Departamento de Ciencias Químicas; Facultad de Ciencias Exactas; Universidad Andres Bello; Av. República 275 Santiago Chile
| | - Pablo Jaque
- Departamento de Química Orgánica y Fisicoquímica; Facultad de Ciencias Químicas y Farmacéuticas; Universidad de Chile; Sergio Livingstone 1007 Santiago Chile
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Facultad de Ciencias Químicas; Universidad Complutense de Madrid; 28040 Madrid Spain
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28
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Zwettler N, Walg SP, Belaj F, Mösch‐Zanetti NC. Heterolytic Si-H Bond Cleavage at a Molybdenum-Oxido-Based Lewis Pair. Chemistry 2018; 24:7149-7160. [PMID: 29521459 PMCID: PMC6001527 DOI: 10.1002/chem.201800226] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/15/2022]
Abstract
The reaction of a molybdenum(VI) oxido imido complex with the strong Lewis acid B(C6 F5 )3 gave access to the Lewis adduct [Mo{OB(C6 F5 )3 }(NtBu)L2 ] featuring reversible B-O bonding in solution. The resulting frustrated Lewis pair (FLP)-like reactivity is reflected by the compound's ability to heterolytically cleave Si-H bonds, leading to a clean formation of the novel cationic MoVI species 3 a (R=Et) and 3 b (R=Ph) of the general formula [Mo(OSiR3 )(NtBu)L2 ][HB(C6 F5 )3 ]. These compounds possess properties highly unusual for molybdenum d0 species such as an intensive, charge-transfer-based color as well as a reversible redox couple at very low potentials, both dependent on the silane used. Single-crystal X-ray diffraction analyses of 2 and 4 b, a derivative of 3 b featuring the [FB(C6 F5 )3 ]- anion, picture the stepwise elongation of the Mo=O bond, leading to a large increase in the electrophilicity of the metal center. The reaction of 3 a and 3 b with benzaldehyde allowed for the regeneration of compound 2 by hydrosilylation of the benzaldehyde. NMR spectroscopy suggested an unusual mechanism for the transformation, involving a substrate insertion in the B-H bond of the borohydride anion.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Simon P. Walg
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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29
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Das S, Mondal S, Pati SK. Mechanistic Insights into Hydrogen Activation by Frustrated N/Sn Lewis Pairs. Chemistry 2018; 24:2575-2579. [PMID: 29276811 DOI: 10.1002/chem.201705861] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Indexed: 12/31/2022]
Abstract
The mechanism of H2 activation by recently reported N/Sn Lewis pairs is unravelled using the representative iPr3 SnOTf/DABCO combination. Computations provide evidence for weak intermolecular associations between Lewis acid and Lewis base (LA/LB) in which the counteranion to cationic LA fragment plays a critical role. Two frustrated Lewis pairs (FLPs) are observed; an unprecedented counteranion-mediated noncovalent LA/LB association is characterised along with the usual FLP structure. Both the FLPs are shown to be capable of H2 activation through cooperative electron transfer processes involving the LA/LB centres. Overall, computed results are in good agreement with the experimental findings and account for the observed reactivity. Insights obtained in this study are fundamentally important for the rational design of Sn-based alternative FLP LAs. The present findings could also provide a general mechanistic framework for H2 activation by FLPs having an ion pair LA component.
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Affiliation(s)
- Shubhajit Das
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Sukanta Mondal
- Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India.,Present address: Department of Educational Science, Ashutosh Mukhopadhyay School of Education, Assam University, Silchar, 788011, Assam, India
| | - Swapan K Pati
- Theoretical Sciences Unit and New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
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30
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Mane MV, Vanka K. Less Frustration, More Activity-Theoretical Insights into Frustrated Lewis Pairs for Hydrogenation Catalysis. ChemCatChem 2017. [DOI: 10.1002/cctc.201700289] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Manoj V. Mane
- Physical Chemistry Division; National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune Maharashtra India
- Center for Catalytic Hydrocarbon Functionalizations; Institute of Basic Science (IBS); Department of Chemistry; Korea Advanced Institute of Science and Technology (KAIST); Daejeon 34141 Republic of Korea
| | - Kumar Vanka
- Physical Chemistry Division; National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune Maharashtra India
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31
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Dong Z, Li Z, Liu X, Yan C, Wei N, Kira M, Müller T. Dihydrogen Splitting Using Dialkylsilylene-Based Frustrated Lewis Pairs. Chem Asian J 2017; 12:1204-1207. [DOI: 10.1002/asia.201700143] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Zhaowen Dong
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
- Institute of Chemistry; Carl von Ossietzky Universität Oldenburg; Carl-von-Ossietzky-Str. 9-11 26129 Oldenburg Germany
| | - Zhifang Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
| | - Xupeng Liu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
| | - Chenting Yan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
| | - Ningka Wei
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
| | - Mitsuo Kira
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University; No. 2318 Yuhangtang Rd. Hangzhou 311121 Zhejiang China
| | - Thomas Müller
- Institute of Chemistry; Carl von Ossietzky Universität Oldenburg; Carl-von-Ossietzky-Str. 9-11 26129 Oldenburg Germany
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32
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Heshmat M, Privalov T. A Prediction of Proton-Catalyzed Hydrogenation of Ketones in Lewis Basic Solvent through Facile Splitting of Hydrogen Molecules. Chemistry 2017; 23:1036-1039. [PMID: 27883245 DOI: 10.1002/chem.201605443] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 11/06/2022]
Abstract
A ketone's carbonyl carbon is electrophilic and harbors a part of the lowest unoccupied molecular orbital of the carbonyl group, resembling a Lewis acidic center; under the right circumstances it exhibits very useful chemical reactivity, although the natural electrophilicity of the ketone's carbonyl carbon is often not strong enough on its own to produce such reactivity. Quantum chemical calculations predict that a proton shared between a ketone and the Lewis basic solvent molecule (dioxane or THF) activates carbonyl carbon to the point of enabling a facile heterolytic splitting of H2 . Proton-catalyzed hydrogenation of a ketone in Lewis basic solvent is the result. The mechanism involves the interaction of H2 with the enhanced Lewis acidity of a carbonyl carbon and the free Lewis basic solvent molecule polarizes H2 and enables the hydride-type attack on carbonyl carbon, which is very strongly influenced by the proton shared between a ketone and solvent. The hydride-type attack on carbon is reminiscent of the splitting of H2 by singlet carbenes except that, in this case, a Lewis base from the surrounding environment (solvent) is necessary for polarization of H2 and acceptance of the proton resulting from the heterolytic splitting of H2 .
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Affiliation(s)
- Mojgan Heshmat
- Department of Organic Chemistry, Stockholm University, Stockholm, 10691, Sweden
| | - Timofei Privalov
- Department of Organic Chemistry, Stockholm University, Stockholm, 10691, Sweden
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33
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Tussing S, Ohland M, Wicker G, Flörke U, Paradies J. Borane-catalyzed indole synthesis through intramolecular hydroamination. Dalton Trans 2017; 46:1539-1545. [DOI: 10.1039/c6dt04725d] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Catalytic metal-free intramolecular hydroamination for the synthesis of indoles and tetrahydroisoquinolines was achieved.
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Affiliation(s)
- Sebastian Tussing
- Institute of Organic Chemistry
- University of Paderborn
- D-33098 Paderborn
- Germany
| | - Miriam Ohland
- Institute of Organic Chemistry
- University of Paderborn
- D-33098 Paderborn
- Germany
| | - Garrit Wicker
- Institute of Organic Chemistry
- University of Paderborn
- D-33098 Paderborn
- Germany
| | - Ulrich Flörke
- Institute of Inorganic Chemistry
- University of Paderborn
- D-33098 Paderborn
- Germany
| | - Jan Paradies
- Institute of Organic Chemistry
- University of Paderborn
- D-33098 Paderborn
- Germany
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34
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Del Rio N, Lopez‐Reyes M, Baceiredo A, Saffon‐Merceron N, Lutters D, Müller T, Kato T. N,P‐Heterocyclic Germylene/B(C
6
F
5
)
3
Adducts: A Lewis Pair with Multi‐reactive Sites. Angew Chem Int Ed Engl 2016; 56:1365-1370. [DOI: 10.1002/anie.201610455] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 11/28/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Natalia Del Rio
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Morelia Lopez‐Reyes
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | | | - Dennis Lutters
- Institut für Chemie Carl von Ossietzky Universität Oldenburg Carl von Ossietzky-Strasse 9–11 26111 Oldenburg Germany
| | - Thomas Müller
- Institut für Chemie Carl von Ossietzky Universität Oldenburg Carl von Ossietzky-Strasse 9–11 26111 Oldenburg Germany
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
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35
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Del Rio N, Lopez‐Reyes M, Baceiredo A, Saffon‐Merceron N, Lutters D, Müller T, Kato T. N,P‐Heterocyclic Germylene/B(C
6
F
5
)
3
Adducts: A Lewis Pair with Multi‐reactive Sites. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610455] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Natalia Del Rio
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Morelia Lopez‐Reyes
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
| | | | - Dennis Lutters
- Institut für Chemie Carl von Ossietzky Universität Oldenburg Carl von Ossietzky-Strasse 9–11 26111 Oldenburg Germany
| | - Thomas Müller
- Institut für Chemie Carl von Ossietzky Universität Oldenburg Carl von Ossietzky-Strasse 9–11 26111 Oldenburg Germany
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069 118 route de Narbonne 31062 Toulouse cedex 9 France
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36
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Das S, Pati SK. On the Mechanism of Frustrated Lewis Pair Catalysed Hydrogenation of Carbonyl Compounds. Chemistry 2016; 23:1078-1085. [DOI: 10.1002/chem.201602774] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Shubhajit Das
- New Chemistry Unit; Jawaharlal Nehru Centre for Advanced Scientific Research; Bangalore 560064 India
| | - Swapan K. Pati
- Theoretical Sciences Unit and New Chemistry Unit; Jawaharlal Nehru Centre for Advanced Scientific Research; Bangalore 560064 India
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37
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38
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Scott DJ, Phillips NA, Sapsford JS, Deacy AC, Fuchter MJ, Ashley AE. Versatile Catalytic Hydrogenation Using A Simple Tin(IV) Lewis Acid. Angew Chem Int Ed Engl 2016; 55:14738-14742. [PMID: 27774711 PMCID: PMC5129554 DOI: 10.1002/anie.201606639] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/05/2016] [Indexed: 12/19/2022]
Abstract
Despite the rapid development of frustrated Lewis pair (FLP) chemistry over the last ten years, its application in catalytic hydrogenations remains dependent on a narrow family of structurally similar early main-group Lewis acids (LAs), inevitably placing limitations on reactivity, sensitivity and substrate scope. Herein we describe the FLP-mediated H2 activation and catalytic hydrogenation activity of the alternative LA iPr3 SnOTf, which acts as a surrogate for the trialkylstannylium ion iPr3 Sn+ , and is rapidly and easily prepared from simple, inexpensive starting materials. This highly thermally robust LA is found to be competent in the hydrogenation of a number of different unsaturated functional groups (which is unique to date for main-group FLP LAs not based on boron), and also displays a remarkable tolerance to moisture.
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Affiliation(s)
- Daniel J. Scott
- Department of ChemistryImperial College LondonLondonSW7 2AZUK
| | | | | | - Arron C. Deacy
- Department of ChemistryImperial College LondonLondonSW7 2AZUK
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39
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Arrowsmith M, Böhnke J, Braunschweig H, Celik MA, Dellermann T, Hammond K. Uncatalyzed Hydrogenation of First-Row Main Group Multiple Bonds. Chemistry 2016; 22:17169-17172. [PMID: 27685839 DOI: 10.1002/chem.201604094] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Indexed: 01/06/2023]
Abstract
Room temperature hydrogenation of an SIDep-stabilized diboryne (SIDep=1,3-bis(diethylphenyl)-4,5-dihydroimidazol-2-ylidene) and a cAAC-supported diboracumulene (cAAC=1-(2,6-diisopropylphenyl)-3,3,5,5-tetramethylpyrrolidin-2-ylidene) provided the first selective route to the corresponding 1,2-dihydrodiborenes. DFT calculations showed an overall exothermic (ΔG=19.4 kcal mol-1 ) two-step asynchronous H2 addition mechanism proceeding via a bridging hydride.
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Affiliation(s)
- Merle Arrowsmith
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Julian Böhnke
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Mehmet Ali Celik
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Theresa Dellermann
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Kai Hammond
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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40
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Scott DJ, Phillips NA, Sapsford JS, Deacy AC, Fuchter MJ, Ashley AE. Versatile Catalytic Hydrogenation Using A Simple Tin(IV) Lewis Acid. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606639] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Daniel J. Scott
- Department of Chemistry; Imperial College London; London SW7 2AZ UK
| | | | | | - Arron C. Deacy
- Department of Chemistry; Imperial College London; London SW7 2AZ UK
| | | | - Andrew E. Ashley
- Department of Chemistry; Imperial College London; London SW7 2AZ UK
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41
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Iashin V, Chernichenko K, Pápai I, Repo T. Atom-Efficient Synthesis of Alkynylfluoroborates Using BF3
-Based Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2016; 55:14146-14150. [DOI: 10.1002/anie.201608520] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Vladimir Iashin
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
| | - Konstantin Chernichenko
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
| | - Imre Pápai
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Magyar tudósok körútja 2, H- 1117 Budapest Hungary
| | - Timo Repo
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
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42
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Iashin V, Chernichenko K, Pápai I, Repo T. Atom-Efficient Synthesis of Alkynylfluoroborates Using BF3
-Based Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608520] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Vladimir Iashin
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
| | - Konstantin Chernichenko
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
| | - Imre Pápai
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Magyar tudósok körútja 2, H- 1117 Budapest Hungary
| | - Timo Repo
- Department of Chemistry; University of Helsinki; A. I. Virtasen aukio 1, FI- 00014 Helsinki Finland
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43
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Rochette É, Bouchard N, Légaré Lavergne J, Matta CF, Fontaine FG. Spontaneous Reduction of a Hydroborane To Generate a B−B Single Bond by the Use of a Lewis Pair. Angew Chem Int Ed Engl 2016; 55:12722-6. [DOI: 10.1002/anie.201605645] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Étienne Rochette
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Nicolas Bouchard
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Julien Légaré Lavergne
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Chérif F. Matta
- Department of Chemistry and Physics; Mount Saint Vincent University; 166 Bedford Highway Halifax Nova Scotia B3M 2J6 Canada
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
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44
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Rochette É, Bouchard N, Légaré Lavergne J, Matta CF, Fontaine FG. Spontaneous Reduction of a Hydroborane To Generate a B−B Single Bond by the Use of a Lewis Pair. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605645] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Étienne Rochette
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Nicolas Bouchard
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Julien Légaré Lavergne
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
| | - Chérif F. Matta
- Department of Chemistry and Physics; Mount Saint Vincent University; 166 Bedford Highway Halifax Nova Scotia B3M 2J6 Canada
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec Québec G1V 0A6 Canada
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45
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Dehydrierende Oxidation von Indolinen und anderen Heterocyclen durch frustrierte Lewis-Paare. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606426] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander F. G. Maier
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Sebastian Tussing
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Tobias Schneider
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Ulrich Flörke
- Institut für Anorganische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Jan Paradies
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
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46
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Frustrated Lewis Pair Catalyzed Dehydrogenative Oxidation of Indolines and Other Heterocycles. Angew Chem Int Ed Engl 2016; 55:12219-23. [PMID: 27594431 DOI: 10.1002/anie.201606426] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/02/2016] [Indexed: 11/11/2022]
Abstract
An acceptorless dehydrogenation of heterocycles catalyzed by frustrated Lewis pairs (FLPs) was developed. Oxidation with concomitant liberation of molecular hydrogen proceeded in high to excellent yields for N-protected indolines as well as four other substrate classes. The mechanism of this unprecedented FLP-catalyzed reaction was investigated by mechanistic studies, characterization of reaction intermediates by NMR spectroscopy and X-ray crystal analysis, and by quantum-mechanical calculations. Hydrogen liberation from the ammonium hydridoborate intermediate is the rate-determining step of the oxidation. The addition of a weaker Lewis acid as a hydride shuttle increased the reaction rate by a factor of 2.28 through a second catalytic cycle.
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Affiliation(s)
- Alexander F G Maier
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Sebastian Tussing
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Tobias Schneider
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Ulrich Flörke
- Institute of Inorganic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany.
| | - Jan Paradies
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany.
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47
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Kojima M, Kanai M. Tris(pentafluorophenyl)borane‐Catalyzed Acceptorless Dehydrogenation of N‐Heterocycles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606177] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Masahiro Kojima
- Graduate School of Pharmaceutical Sciences The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences The University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Japan Science and Technology Agency, ERATO Kanai Life Science Catalysis Project Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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48
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Kojima M, Kanai M. Tris(pentafluorophenyl)borane-Catalyzed Acceptorless Dehydrogenation of N-Heterocycles. Angew Chem Int Ed Engl 2016; 55:12224-7. [DOI: 10.1002/anie.201606177] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 07/24/2016] [Indexed: 01/11/2023]
Affiliation(s)
- Masahiro Kojima
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Motomu Kanai
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Japan Science and Technology Agency, ERATO; Kanai Life Science Catalysis Project; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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49
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Tussing S, Kaupmees K, Paradies J. Structure-Reactivity Relationship in the Frustrated Lewis Pair (FLP)-Catalyzed Hydrogenation of Imines. Chemistry 2016; 22:7422-6. [PMID: 27060884 DOI: 10.1002/chem.201600716] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Indexed: 11/08/2022]
Abstract
The autoinduced, frustrated Lewis pair (FLP)-catalyzed hydrogenation of 16-benzene-ring substituted N-benzylidene-tert-butylamines with B(2,6-F2 C6 H3 )3 and molecular hydrogen was investigated by kinetic analysis. The pKa values for imines and for the corresponding amines were determined by quantum-mechanical methods and provided a direct proportional relationship. The correlation of the two rate constants k1 (simple catalytic cycle) and k2 (autoinduced catalytic cycle) with pKa difference between imine and amine pairs (ΔpKa ) or Hammett's σ parameter served as useful parameters to establish a structure-reactivity relationship for the FLP-catalyzed hydrogenation of imines.
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Affiliation(s)
- Sebastian Tussing
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Karl Kaupmees
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Jan Paradies
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany.
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50
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Mohr J, Porwal D, Chatterjee I, Oestreich M. Extending the Scope of the B(C6F5)3-Catalyzed CN Bond Reduction: Hydrogenation of Oxime Ethers and Hydrazones. Chemistry 2015; 21:17583-6. [DOI: 10.1002/chem.201503509] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Indexed: 11/11/2022]
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