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Fan KW, Luk HL, Phillips DL. A Computational Study of Photoinduced Borylation for Selected Boron Sources. ChemistryOpen 2024; 13:e202300285. [PMID: 38456364 PMCID: PMC11230929 DOI: 10.1002/open.202300285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/02/2024] [Indexed: 03/09/2024] Open
Abstract
This research article uses density functional theory (DFT) to study photoinduced borylation. This work examined the electron donor-acceptor complex (EDA) of bis(catecholato)diboron with different redox-active leaving groups and bis(pinacol)diboron with aryl N-hydroxyphthalimide. The results of these DFT studies show the complex ratio of B2cat2 and N, N-dimethylacetamide (DMA) should be 1 : 2 which is consistent with the experimental results in the literature. We further proposed a reaction mechanism and calculated the energies associated with each step.
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Affiliation(s)
- Ka Wa Fan
- Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Hoi Ling Luk
- Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
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2
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Zou W, Yang M, He L, Gao L, Wang G, Li S. Mechanistic Insights into the Metal-Free Deoxygenative Borylation of Ketones and Aldehydes with Bis(catecholato)diborane. Chemistry 2023; 29:e202203526. [PMID: 36547373 DOI: 10.1002/chem.202203526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/18/2022] [Accepted: 12/22/2022] [Indexed: 12/24/2022]
Abstract
The mechanisms of direct deoxygenative borylation of acetone and benzaldehyde with bis(catecholato)diborane (B2 cat2 ) in the solvent N,N-dimethylacetamide (DMA) are investigated through detailed density functional theory calculations. These calculations show that the isomer 1,2-B2 cat2 in situ generated from 1,1-B2 cat2 induced by DMA is the reactive boron intermediate for the reactions. The addition of the B-B bond of 1,2-B2 cat2 to the C=O bond of acetone or benzaldehyde via a concerted [2σ+2π]-cycloaddition-like transition state is the rate-limiting step for both the triboration reaction of acetone and the monoboration reaction of benzaldehyde. DMA not only acts as the solvent but also promotes the structural isomerization of B2 cat2 , the deoxygenation of acetone to form the vinyl boronate intermediate and subsequent diboration of vinyl boronate with 1,2-B2 cat2 , as well as the protodeboronation of the gem-diboronate intermediate in the deoxygenative borylation of benzaldehyde. The presented computational results can explain the observed experimental facts and provide insight into the roles of the isomeric 1,2-B2 cat2 and the solvent DMA in related reactions.
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Affiliation(s)
- Wentian Zou
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Mo Yang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Linke He
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Liuzhou Gao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.,Key Laboratory of Organosilicon Chemistry, and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China
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3
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Zhang L, Wu Z, Jiao L. Photoinduced Radical Borylation of Alkyl Bromides Catalyzed by 4‐Phenylpyridine. Angew Chem Int Ed Engl 2020; 59:2095-2099. [DOI: 10.1002/anie.201912564] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/01/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Li Zhang
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Zhong‐Qian Wu
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
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4
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Zhang L, Wu Z, Jiao L. Photoinduced Radical Borylation of Alkyl Bromides Catalyzed by 4‐Phenylpyridine. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912564] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Li Zhang
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Zhong‐Qian Wu
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS)Department of ChemistryTsinghua University Beijing 100084 China
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5
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Yang H, Zhang L, Zhou FY, Jiao L. An umpolung approach to the hydroboration of pyridines: a novel and efficient synthesis of N-H 1,4-dihydropyridines. Chem Sci 2019; 11:742-747. [PMID: 34123047 PMCID: PMC8145361 DOI: 10.1039/c9sc05627k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The first inverse hydroboration of pyridine with a diboron(4) compound and a proton source has been realized under simple basic and catalyst-free conditions. This process consists of a formal boryl anion addition to pyridine, which produces an N-boryl pyridyl anion complex, and the subsequent protonation of the anion complex. This process enables a simple and efficient method for the synthesis of multi-substituted N-H 1,4-dihydropyridine (1,4-DHP) derivatives that are difficult to prepare using established methods. Furthermore, this method allows for facile preparation of 4-deuterated 1,4-DHPs from an easily accessible deuterium ion source. This inverse hydroboration reaction represents a new mode for pyridine functionalization.
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Affiliation(s)
- Huan Yang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Li Zhang
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Fei-Yu Zhou
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University Beijing 100084 China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University Beijing 100084 China
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6
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Malapit CA, Bour JR, Laursen SR, Sanford MS. Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides. J Am Chem Soc 2019; 141:17322-17330. [PMID: 31617708 PMCID: PMC11103277 DOI: 10.1021/jacs.9b08961] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This Article describes the development of a base-free, nickel-catalyzed decarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations revealed that diboron reagents undergo transmetalation with this Ni(aryl)(fluoride) intermediate at rates significantly faster than their aryl boronate ester congeners. Furthermore, the reactivity of both boron reagents toward transmetalation is enhanced with increasing electrophilicity of the boron center. These mechanistic insights were leveraged to develop a catalytic decarbonylative borylation of acid fluorides that proved applicable to a variety of (hetero)aryl carboxylic acid fluorides as well as diverse diboron reagents. The acid fluorides can be generated in situ directly from carboxylic acids. Furthermore, the mechanistic studies directed the identification of various air-stable Ni pre-catalysts for this transformation.
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Affiliation(s)
- Christian A. Malapit
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - James R. Bour
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Simon R. Laursen
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
| | - Melanie S. Sanford
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, MI 48109 US
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7
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Cid J, Hermann A, Radcliffe JE, Curless LD, Braunschweig H, Ingleson MJ. Synthesis of Unsymmetrical Diboron(5) Compounds and Their Conversion to Diboron(5) Cations. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jessica Cid
- School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Alexander Hermann
- 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
| | - James E. Radcliffe
- School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Liam D. Curless
- School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - 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
| | - Michael J. Ingleson
- School of Chemistry, The University of Manchester, Manchester M13 9PL, United Kingdom
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8
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Transition-metal-free diboration of non-activated olefins: A reaction mechanism revisited. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.03.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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9
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Oschmann W, Borner C, Kleeberg C. Unsymmetrical diborane(4) derivatives by copper mediated B-B coupling. Dalton Trans 2018; 47:5318-5327. [PMID: 29589025 DOI: 10.1039/c8dt00627j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel, versatile and modular route to unsymmetrical diborane(4) derivatives bearing either two different diol moieties or one diol and one diamine moiety is presented. Utilising the very basic approach of reacting a boron nucleophile with a boron electrophile to establish the B-B bond allows a simple variation of the two individual boron moieties. The copper(i) boryl complexes used as nucleophilic boron sources are readily accessible from commercially available symmetrical diborane(4) derivatives, whilst equally readily available boron halide derivatives are used as electrophiles. Seven previously inaccessible diborane(4) derivatives were obtained and fully characterised, including single crystal X-ray structure determinations, illustrating the broad scope of the method.
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Affiliation(s)
- W Oschmann
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
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10
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Yan L, Meng Y, Haeffner F, Leon RM, Crockett MP, Morken JP. Carbohydrate/DBU Cocatalyzed Alkene Diboration: Mechanistic Insight Provides Enhanced Catalytic Efficiency and Substrate Scope. J Am Chem Soc 2018; 140:3663-3673. [PMID: 29442502 DOI: 10.1021/jacs.7b12316] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mechanistic investigation of the carbohydrate/DBU cocatalyzed enantioselective diboration of alkenes is presented. These studies provide an understanding of the origin of stereoselectivity and also reveal a strategy for enhancing reactivity and broadening the substrate scope.
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Affiliation(s)
- Lu Yan
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Yan Meng
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Robert M Leon
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Michael P Crockett
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - James P Morken
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
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11
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Franz D, Szilvási T, Pöthig A, Deiser F, Inoue S. Three-Coordinate Boron(III) and Diboron(II) Dications. Chemistry 2018; 24:4283-4288. [DOI: 10.1002/chem.201800609] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Franz
- Department of Chemistry, Catalysis Research Center; Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstr. 4 85748 Garching bei München Germany
| | - Tibor Szilvási
- Department of Chemical and Biological Engineering; University of Wisconsin-Madison; 1415 Engineering Drive Madison WI 53706-1607 USA
| | - Alexander Pöthig
- Department of Chemistry, Catalysis Research Center; Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstr. 4 85748 Garching bei München Germany
| | - Franziska Deiser
- Department of Chemistry, Catalysis Research Center; Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstr. 4 85748 Garching bei München Germany
| | - Shigeyoshi Inoue
- Department of Chemistry, Catalysis Research Center; Institute of Silicon Chemistry; Technische Universität München; Lichtenbergstr. 4 85748 Garching bei München Germany
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12
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Eck M, Würtemberger-Pietsch S, Eichhorn A, Berthel JHJ, Bertermann R, Paul USD, Schneider H, Friedrich A, Kleeberg C, Radius U, Marder TB. B-B bond activation and NHC ring-expansion reactions of diboron(4) compounds, and accurate molecular structures of B 2(NMe 2) 4, B 2eg 2, B 2neop 2 and B 2pin 2. Dalton Trans 2018; 46:3661-3680. [PMID: 28252145 DOI: 10.1039/c7dt00334j] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this detailed study we report on the structures of the widely employed diboron(4) compounds bis(pinacolato)diboron (B2pin2) and bis(neopentyl glycolato)diboron (B2neop2), as well as bis(ethylene glycolato)diboron (B2eg2) and tetrakis(dimethylamino)diboron (B2(NMe2)4), and their reactivity, along with that of bis(catecholato)diboron (B2cat2) with backbone saturated and backbone unsaturared N-heterocyclic carbenes (NHCs) of different steric demand. Depending on the nature of the diboron(4) compound and the NHC used, Lewis-acid/Lewis-base adducts or NHC ring-expansion products stemming from B-B and C-N bond activation have been observed. The corresponding NHC adducts and NHC ring-expanded products were isolated and characterised via solid-state and solution NMR spectroscopy and X-ray diffraction. In general, we observed B-B bond and C-N bond activation at low temperature for B2eg2, at room temperature for B2neop2 and at higher temperature for B2cat2. The reactivity strongly depends on steric effects of the NHCs and the diboron(4) compounds, as well as on the corresponding Lewis-basicity and Lewis-acidity. Our results provide profound insight into the chemistry of these diboron(4) reagents with the nowadays ubiquitous NHCs, the stability of the corresponding NHC adducts and on B-B bond activation using Lewis-bases in general. We demonstrate that B-B bond activation may be triggered even at temperatures as low as -40 °C to -30 °C without any metal species involved. For example, the reactions of B2eg2 with sterically less demanding NHCs such as Me2ImMe and iPr2Im in solution led to the corresponding ring-expanded products at low temperatures. Furthermore, boronium [L2B(OR)2]+ and borenium [LB(OR)2]+ cations have been observed from the reaction of the bis-borate B2eg3 with the NHCs iPr2Im and Me2ImMe, which led to the conclusion that the activation of bis-borates with NHCs (or Lewis-bases in general) might be a facile and simple route to access such species.
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Affiliation(s)
- Martin Eck
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Sabrina Würtemberger-Pietsch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Antonius Eichhorn
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Johannes H J Berthel
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Rüdiger Bertermann
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Ursula S D Paul
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Heidi Schneider
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Christian Kleeberg
- Institut für Anorganische und Analytische Chemie, Technische Universität Carolo-Wilhelmina zu Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
| | - Udo Radius
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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13
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Flinker M, Yin H, Juhl RW, Eikeland EZ, Overgaard J, Nielsen DU, Skrydstrup T. Efficient Water Reduction with sp3
-sp3
Diboron(4) Compounds: Application to Hydrogenations, H-D Exchange Reactions, and Carbonyl Reductions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709685] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mathias Flinker
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Hongfei Yin
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - René W. Juhl
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Espen Z. Eikeland
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Jacob Overgaard
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Dennis U. Nielsen
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
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14
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Flinker M, Yin H, Juhl RW, Eikeland EZ, Overgaard J, Nielsen DU, Skrydstrup T. Efficient Water Reduction with sp3
-sp3
Diboron(4) Compounds: Application to Hydrogenations, H-D Exchange Reactions, and Carbonyl Reductions. Angew Chem Int Ed Engl 2017; 56:15910-15915. [DOI: 10.1002/anie.201709685] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/24/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Mathias Flinker
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Hongfei Yin
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - René W. Juhl
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Espen Z. Eikeland
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Jacob Overgaard
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Dennis U. Nielsen
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center (CADIAC); Center for Materials Crystallography (CMC); Department of Chemistry and the; Interdisciplinary Nanoscience Center (iNANO); Aarhus University; Gustav Wieds Vej 14 8000 Aarhus C Denmark
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15
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Geier SJ, Vogels CM, Mellonie NR, Daley EN, Decken A, Doherty S, Westcott SA. The Phosphinoboration ofN-Heterocycles. Chemistry 2017; 23:14485-14499. [DOI: 10.1002/chem.201702203] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Stephen J. Geier
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville NB E4L 1G8 Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville NB E4L 1G8 Canada
| | - Niall R. Mellonie
- NUCAT, School of Chemistry, Bedson Building; Newcastle University; Newcastle upon Tyne NE1 7RU England
| | - Erika N. Daley
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville NB E4L 1G8 Canada
| | - Andreas Decken
- Department of Chemistry; University of New Brunswick; Fredericton NB E3B 5A3 Canada
| | - Simon Doherty
- NUCAT, School of Chemistry, Bedson Building; Newcastle University; Newcastle upon Tyne NE1 7RU England
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry; Mount Allison University; Sackville NB E4L 1G8 Canada
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16
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Farre A, Soares K, Briggs RA, Balanta A, Benoit DM, Bonet A. Amine Catalysis for the Organocatalytic Diboration of Challenging Alkenes. Chemistry 2016; 22:17552-17556. [DOI: 10.1002/chem.201603979] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Indexed: 01/29/2023]
Affiliation(s)
- Albert Farre
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
| | - Kaline Soares
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
| | - Rachel A. Briggs
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
| | - Angelica Balanta
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
| | - David M. Benoit
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
| | - Amadeu Bonet
- Department of Chemistry; University of Hull; Cottingham Road HU6 7RX Hull UK
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Neeve EC, Geier SJ, Mkhalid IAI, Westcott SA, Marder TB. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem Rev 2016; 116:9091-161. [PMID: 27434758 DOI: 10.1021/acs.chemrev.6b00193] [Citation(s) in RCA: 748] [Impact Index Per Article: 93.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Although known for over 90 years, only in the past two decades has the chemistry of diboron(4) compounds been extensively explored. Many interesting structural features and reaction patterns have emerged, and more importantly, these compounds now feature prominently in both metal-catalyzed and metal-free methodologies for the formation of B-C bonds and other processes.
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Affiliation(s)
- Emily C Neeve
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
| | - Stephen J Geier
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | | | - Stephen A Westcott
- Mount Allison University , Department of Biochemistry and Chemistry, Sackville, New Brunswick E4L 1G8, Canada
| | - Todd B Marder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Würzburg 97074, Germany
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Fang L, Yan L, Haeffner F, Morken JP. Carbohydrate-Catalyzed Enantioselective Alkene Diboration: Enhanced Reactivity of 1,2-Bonded Diboron Complexes. J Am Chem Soc 2016; 138:2508-11. [PMID: 26854364 PMCID: PMC4896641 DOI: 10.1021/jacs.5b13174] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalytic enantioselective diboration of alkenes is accomplished with readily available carbohydrate-derived catalysts. Mechanistic experiments suggest the intermediacy of 1,2-bonded diboronates.
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Affiliation(s)
- Lichao Fang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Lu Yan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - Fredrik Haeffner
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - James P. Morken
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
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Würtemberger-Pietsch S, Radius U, Marder TB. 25 years of N-heterocyclic carbenes: activation of both main-group element-element bonds and NHCs themselves. Dalton Trans 2015; 45:5880-95. [PMID: 26675582 DOI: 10.1039/c5dt04106f] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
N-Heterocyclic carbenes (NHCs) are widely used ligands and reagents in modern inorganic synthesis as well as in homogeneous catalysis and organocatalysis. However, NHCs are not always innocent bystanders. In the last few years, more and more examples were reported of reactions of NHCs with main-group elements which resulted in modification of the NHC. Many of these reactions lead to ring expansion and the formation of six-membered heterocyclic rings involving insertion of the heteroatom into the C-N bond and migration of hydrides, phenyl groups or boron-containing fragments. Furthermore, a few related NHC rearrangements were observed some decades ago. In this Perspective, we summarise the history of NHC ring expansion reactions from the 1960s till the present.
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Affiliation(s)
- Sabrina Würtemberger-Pietsch
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. u.radius@uni-wuerzburg
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