1
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Lindl F, Lamprecht A, Arrowsmith M, Khitro E, Rempel A, Dietz M, Wellnitz T, Bélanger-Chabot G, Stoy A, Paprocki V, Prieschl D, Lenczyk C, Ramler J, Lichtenberg C, Braunschweig H. Aromatic 1,2-Azaborinin-1-yls as Electron-Withdrawing Anionic Nitrogen Ligands for Main Group Elements. Chemistry 2023; 29:e202203345. [PMID: 36412126 DOI: 10.1002/chem.202203345] [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: 10/27/2022] [Revised: 11/21/2022] [Accepted: 11/21/2022] [Indexed: 11/23/2022]
Abstract
The 2-aryl-3,4,5,6-tetraphenyl-1,2-azaborinines 1-EMe3 and 2-EMe3 (E=Si, Sn; aryl=Ph (1), Mes (=2,4,6-trimethylphenyl, 2)) were synthesized by ring-expansion of borole precursors with N3 EMe3 -derived nitrenes. Desilylative hydrolysis of 1- and 2-SiMe3 yielded the corresponding N-protonated azaborinines, which were deprotonated with nBuLi or MN(SiMe3 )2 (M=Na, K) to the corresponding group 1 salts, 1-M and 2-M. While the lithium salts crystallized as monomeric Lewis base adducts, the potassium salts formed coordination polymers or oligomers via intramolecular K⋅⋅⋅aryl π interactions. The reaction of 1-M or 2-M with CO2 yielded N-carboxylate salts, which were derivatized by salt metathesis to methyl and silyl esters. Salt metathesis of 1-M or 2-M with methyl triflate, [Cp*BeCl] (Cp*=C5 Me5 ), BBr2 Ar (Ar=Ph, Mes, 2-thienyl), ECl3 (E=B, Al, Ga) and PX3 (X=Cl, Br) afforded the respective group 2, 13 and 15 1,2-azaborinin-2-yl complexes. Salt metathesis of 1-K with BBr3 resulted not only in N-borylation but also Ph-Br exchange between the endocyclic and exocyclic boron atoms. Solution 11 B NMR data suggest that the 1,2-azaborinin-2-yl ligand is similarly electron-withdrawing to a bromide. In the solid state the endocyclic bond length alternation and the twisting of the C4 BN ring increase with the sterics of the substituents at the boron and nitrogen atoms, respectively. Regression analyses revealed that the downfield shift of the endocyclic 11 B NMR resonances is linearly correlated to both the degree of twisting of the C4 BN ring and the tilt angle of the N-substituent. Calculations indicate that the 1,2-azaborinin-1-yl ligand has no sizeable π-donor ability and that the aromaticity of the ring can be subtly tuned by the electronics of the N-substituent.
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Affiliation(s)
- Felix Lindl
- 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
| | - Anna Lamprecht
- 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
| | - 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
| | - Eugen Khitro
- 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
| | - Anna Rempel
- 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
| | - Maximilian Dietz
- 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
| | - Tim Wellnitz
- 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
| | | | - Andreas Stoy
- 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
| | - Valerie Paprocki
- 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
| | - Dominik Prieschl
- 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
| | - Carsten Lenczyk
- 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
| | - Jacqueline Ramler
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Crispin Lichtenberg
- Chemistry Department - FB 15, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032, Marburg, 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
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2
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Heß M, Krummenacher I, Dellermann T, Braunschweig H. Rhodium-Mediated Stoichiometric Synthesis of Mono-, Bi-, and Bis-1,2-Azaborinines: 1-Rhoda-3,2-azaboroles as Reactive Precursors. Chemistry 2021; 27:9503-9507. [PMID: 34060149 PMCID: PMC8362125 DOI: 10.1002/chem.202100795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Indexed: 11/22/2022]
Abstract
A series of highly substituted 1,2-azaborinines, including a phenylene-bridged bis-1,2-azaborinine, was synthesized from the reaction of 1,2-azaborete rhodium complexes with variously substituted alkynes. 1-Rhoda-3,2-azaborole complexes, which are accessible by phosphine addition to the corresponding 1,2-azaborete complexes, were also found to be suitable precursors for the synthesis of 1,2-azaborinines and readily reacted with alkynyl-substituted 1,2-azaborinines to generate new regioisomers of bi-1,2-azaborinines, which feature directly connected aromatic rings. Their molecular structures, which can be viewed as boron-nitrogen isosteres of biphenyls, show nearly perpendicular 1,2-azaborinine rings. The new method using rhodacycles instead of 1,2-azaborete complexes as precursors is shown to be more effective, allowing the synthesis of a wider range of 1,2-azaborinines.
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Affiliation(s)
- Merlin Heß
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Theresa Dellermann
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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3
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Ein neutrales 1,4‐Diborabenzol als π‐Ligand in Actinoidkomplexen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Peter Hrobárik
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
- Department of Inorganic Chemistry Faculty of Natural Sciences Comenius University 84215 Bratislava Slowakei
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Martin S. Luff
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Thomas Kupfer
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Martin Kaupp
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Holger Braunschweig
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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4
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Stable Actinide π Complexes of a Neutral 1,4-Diborabenzene. Angew Chem Int Ed Engl 2020; 59:13109-13115. [PMID: 32329111 PMCID: PMC7496575 DOI: 10.1002/anie.202004501] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Indexed: 11/25/2022]
Abstract
The π coordination of arene and anionic heteroarene ligands is a ubiquitous bonding motif in the organometallic chemistry of d-block and f-block elements. By contrast, related π interactions of neutral heteroarenes including neutral bora-π-aromatics are less prevalent particularly for the f-block, due to less effective metal-to-ligand backbonding. In fact, π complexes with neutral heteroarene ligands are essentially unknown for the actinides. We have now overcome these limitations by exploiting the exceptionally strong π donor capabilities of a neutral 1,4-diborabenzene. A series of remarkably robust, π-coordinated thorium(IV) and uranium(IV) half-sandwich complexes were synthesized by simply combining the bora-π-aromatic with ThCl4 (dme)2 or UCl4 , representing the first examples of actinide complexes with a neutral boracycle as sandwich-type ligand. Experimental and computational studies showed that the strong actinide-heteroarene interactions are predominately electrostatic in nature with distinct ligand-to-metal π donation and without significant π/δ backbonding contributions.
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Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Peter Hrobárik
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University84215BratislavaSlovakia
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Martin S. Luff
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Thomas Kupfer
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Kaupp
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Holger Braunschweig
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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5
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Knöller JA, Meng G, Wang X, Hall D, Pershin A, Beljonne D, Olivier Y, Laschat S, Zysman‐Colman E, Wang S. Intramolecular Borylation via Sequential B−Mes Bond Cleavage for the Divergent Synthesis of B,N,B‐Doped Benzo[4]helicenes. Angew Chem Int Ed Engl 2020; 59:3156-3160. [DOI: 10.1002/anie.201912340] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Julius A. Knöller
- Department of ChemistryQueen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
- Institute for Organic ChemistryStuttgart University Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Guoyun Meng
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing China
| | - Xiang Wang
- Department of ChemistryQueen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
| | - David Hall
- Organic Semiconductor CentreEaStCHEM School of ChemistryUniversity of St Andrews St Andrews KY16 9ST UK
- Laboratory for Chemistry of Novel MaterialsUniversity of Mons 7000 Mons Belgium
| | - Anton Pershin
- Laboratory for Chemistry of Novel MaterialsUniversity of Mons 7000 Mons Belgium
| | - David Beljonne
- Laboratory for Chemistry of Novel MaterialsUniversity of Mons 7000 Mons Belgium
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du SolideNamur Institute of Structured MatterUniversité de Namur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Sabine Laschat
- Institute for Organic ChemistryStuttgart University Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Eli Zysman‐Colman
- Organic Semiconductor CentreEaStCHEM School of ChemistryUniversity of St Andrews St Andrews KY16 9ST UK
| | - Suning Wang
- Department of ChemistryQueen's University 90 Bader Lane Kingston Ontario K7L 3N6 Canada
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing China
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6
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Yang W, Krantz KE, Dickie DA, Molino A, Wilson DJD, Gilliard RJ. Crystalline BP‐Doped Phenanthryne via Photolysis of The Elusive Boraphosphaketene. Angew Chem Int Ed Engl 2020; 59:3971-3975. [DOI: 10.1002/anie.201916362] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Wenlong Yang
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Kelsie E. Krantz
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Diane A. Dickie
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Andrew Molino
- Department of Chemistry and Physics La Trobe Institute for Molecular Science La Trobe University Melbourne 3086 Victoria Australia
| | - David J. D. Wilson
- Department of Chemistry and Physics La Trobe Institute for Molecular Science La Trobe University Melbourne 3086 Victoria Australia
| | - Robert J. Gilliard
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
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7
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Yang W, Krantz KE, Dickie DA, Molino A, Wilson DJD, Gilliard RJ. Crystalline BP‐Doped Phenanthryne via Photolysis of The Elusive Boraphosphaketene. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916362] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenlong Yang
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Kelsie E. Krantz
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Diane A. Dickie
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
| | - Andrew Molino
- Department of Chemistry and Physics La Trobe Institute for Molecular Science La Trobe University Melbourne 3086 Victoria Australia
| | - David J. D. Wilson
- Department of Chemistry and Physics La Trobe Institute for Molecular Science La Trobe University Melbourne 3086 Victoria Australia
| | - Robert J. Gilliard
- Department of Chemistry University of Virginia 409 McCormick Rd./ PO Box 400319 Charlottesville VA 22904 USA
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8
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Knöller JA, Meng G, Wang X, Hall D, Pershin A, Beljonne D, Olivier Y, Laschat S, Zysman‐Colman E, Wang S. Divergente Synthese von B,N,B‐Benzo[4]helicenen durch intramolekulare Borylierung unter sequenzieller B‐Mes‐Bindungsspaltung. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912340] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Julius A. Knöller
- Department of Chemistry Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Kanada
- Institut für Organische Chemie Universität Stuttgart Deutschland
| | - Guoyun Meng
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Peking China
| | - Xiang Wang
- Department of Chemistry Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Kanada
| | - David Hall
- Organic Semiconductor Centre EaStCHEM School of Chemistry University of St Andrews St Andrews KY16 9ST Großbritannien
- Laboratory for Chemistry of Novel Materials University of Mons Belgien
| | - Anton Pershin
- Laboratory for Chemistry of Novel Materials University of Mons Belgien
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials University of Mons Belgien
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale, & Laboratoire de Physique du Solide Namur Institute of Structured Matter Université de Namur Belgien
| | - Sabine Laschat
- Institut für Organische Chemie Universität Stuttgart Deutschland
| | - Eli Zysman‐Colman
- Organic Semiconductor Centre EaStCHEM School of Chemistry University of St Andrews St Andrews KY16 9ST Großbritannien
| | - Suning Wang
- Department of Chemistry Queen's University 90 Bader Lane Kingston Ontario K7L 3N6 Kanada
- School of Chemistry and Chemical Engineering Beijing Institute of Technology Peking China
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Wan W, Tian D, Jing Y, Zhang X, Wu W, Ren H, Bao H. NBN‐Doped Conjugated Polycyclic Aromatic Hydrocarbons as an AIEgen Class for Extremely Sensitive Detection of Explosives. Angew Chem Int Ed Engl 2018; 57:15510-15516. [PMID: 30255542 DOI: 10.1002/anie.201809844] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/22/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Wen‐Ming Wan
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
| | - Di Tian
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Ya‐Nan Jing
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
| | - Xiao‐Yun Zhang
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Wei Wu
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Hao Ren
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Hong‐Li Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
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10
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Wan W, Tian D, Jing Y, Zhang X, Wu W, Ren H, Bao H. NBN‐Doped Conjugated Polycyclic Aromatic Hydrocarbons as an AIEgen Class for Extremely Sensitive Detection of Explosives. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809844] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wen‐Ming Wan
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
| | - Di Tian
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Ya‐Nan Jing
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
| | - Xiao‐Yun Zhang
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Wei Wu
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Hao Ren
- School of Materials Science and EngineeringCenter for Bioengineering and BiotechnologyChina University of Petroleum (East China) No. 66, West Changjiang Road Qingdao 266580 China
| | - Hong‐Li Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related TechnologyCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of Matter 155 West Yangqiao Road Fuzhou 350002 China
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11
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Wang Z, Zhou Y, Zhang JX, Krummenacher I, Braunschweig H, Lin Z. DFT Studies on the Reactions of Boroles with Alkynes. Chemistry 2018; 24:9612-9621. [DOI: 10.1002/chem.201801094] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/04/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Zheng Wang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong P.R. China
| | - Yu Zhou
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong P.R. China
| | - Jing-Xuan Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong P.R. China
| | - Ivo Krummenacher
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Zhenyang Lin
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong P.R. China
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12
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Edel K, Yang X, Ishibashi JSA, Lamm AN, Maichle-Mössmer C, Giustra ZX, Liu SY, Bettinger HF. The Dewar Isomer of 1,2-Dihydro-1,2-azaborinines: Isolation, Fragmentation, and Energy Storage. Angew Chem Int Ed Engl 2018; 57:5296-5300. [PMID: 29457683 PMCID: PMC6214188 DOI: 10.1002/anie.201712683] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Indexed: 11/11/2022]
Abstract
The photochemistry of 1,2-dihydro-1,2-azaborinine derivatives was studied under matrix isolation conditions and in solution. Photoisomerization occurs exclusively to the Dewar valence isomers upon irradiation with UV light (>280 nm) with high quantum yield (46 %). Further photolysis with UV light (254 nm) results in the formation of cyclobutadiene and an iminoborane derivative. The thermal electrocyclic ring-opening reaction of the Dewar valence isomer back to the 1,2-dihydro-1-tert-butyldimethylsilyl-2-mesityl-1,2-azaborinine has an activation barrier of (27.0±1.2) kcal mol-1 . In the presence of the Wilkinson catalyst, the ring opening occurs rapidly and exothermically (ΔH=(-48±1) kcal mol-1 ) at room temperature.
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Affiliation(s)
- Klara Edel
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Xinyu Yang
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467-3860, USA
| | | | - Ashley N Lamm
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR, 97403-1253, USA
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Zachary X Giustra
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467-3860, USA
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467-3860, USA
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR, 97403-1253, USA
| | - Holger F Bettinger
- Institut für Organische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
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13
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Edel K, Yang X, Ishibashi JSA, Lamm AN, Maichle-Mössmer C, Giustra ZX, Liu SY, Bettinger HF. The Dewar Isomer of 1,2-Dihydro-1,2-azaborinines: Isolation, Fragmentation, and Energy Storage. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712683] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Klara Edel
- Institut für Organische Chemie; Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Xinyu Yang
- Department of Chemistry; Boston College; Chestnut Hill MA 02467-3860 USA
| | | | - Ashley N. Lamm
- Department of Chemistry and Biochemistry; University of Oregon; Eugene OR 97403-1253 USA
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie; Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Zachary X. Giustra
- Department of Chemistry; Boston College; Chestnut Hill MA 02467-3860 USA
| | - Shih-Yuan Liu
- Department of Chemistry; Boston College; Chestnut Hill MA 02467-3860 USA
- Department of Chemistry and Biochemistry; University of Oregon; Eugene OR 97403-1253 USA
| | - Holger F. Bettinger
- Institut für Organische Chemie; Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
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14
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Baranac-Stojanović M. 4π-Electron B-N Monocycles: Stability and (Anti)aromaticity. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700959] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marija Baranac-Stojanović
- Faculty of Chemistry; University of Belgrade; Studentski trg 12-16, P. O. Box 158 11000 Belgrade Serbia
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15
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Bélanger-Chabot G, Braunschweig H, Roy DK. Recent Developments in Azaborinine Chemistry. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700562] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guillaume Bélanger-Chabot
- 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
| | - Dipak Kumar Roy
- 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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16
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Wang Z, Zhou Y, Lee KH, Lam WH, Dewhurst RD, Braunschweig H, Marder TB, Lin Z. DFT Studies of Dimerization Reactions of Boroles. Chemistry 2017. [PMID: 28627022 DOI: 10.1002/chem.201701737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Boroles undergo dimerization reactions to give Diels-Alder (DA) dimers, bridged-bicyclic (BB) dimers or spiro dimers (SD) depending on the substituents on the borole. We performed DFT calculations to investigate how different substituents at the carbon atoms of the butadiene backbone as well as at the boron atom influence the dimerization reaction pathways. The DFT results show that, in general, both the DA and BB dimers are easily accessible kinetically, and the DA dimers are thermodynamically more stable than the BB dimers. When the substituent-substituent repulsive steric interactions are alleviated to a certain extent, the BB dimers are more stable than the DA dimer, and become accessible. The SD dimers are generally kinetically difficult to obtain. However, we found that aryl substituents promote the formation of the SD dimers.
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Affiliation(s)
- Zheng Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong
| | - Yu Zhou
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong
| | - Ka-Ho Lee
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong
| | - Wai Han Lam
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong
| | - Rian D Dewhurst
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- 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
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong
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17
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Price AN, Nichol GS, Cowley MJ. Phosphaborenes: Accessible Reagents for the Synthesis of C−C/P−B Isosteres. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705050] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Amy N. Price
- EaStCHEMSchool of ChemistryUniversity of Edinburgh Edinburgh EH9 3FJ UK
| | - Gary S. Nichol
- EaStCHEMSchool of ChemistryUniversity of Edinburgh Edinburgh EH9 3FJ UK
| | - Michael J. Cowley
- EaStCHEMSchool of ChemistryUniversity of Edinburgh Edinburgh EH9 3FJ UK
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18
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Price AN, Nichol GS, Cowley MJ. Phosphaborenes: Accessible Reagents for the Synthesis of C-C/P-B Isosteres. Angew Chem Int Ed Engl 2017. [PMID: 28643472 DOI: 10.1002/anie.201705050] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Formal exchange of C=C units with isoelectronic B=N or B=P units can provide access to molecules with unique electronic or chemical properties. Herein, we report the simple solution-phase generation of highly reactive phosphaborenes, RP=BR, and demonstrate their use for the introduction of P=B units into organic systems. Ring opening of a P-B-containing cyclobutene isostere provided access to unique 1,4-boraphosphabutadiene systems with conjugated main-group multiple bonds.
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Affiliation(s)
- Amy N Price
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
| | - Gary S Nichol
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
| | - Michael J Cowley
- EaStCHEM, School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK
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19
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Nutz M, Borthakur B, Dewhurst RD, Deißenberger A, Dellermann T, Schäfer M, Krummenacher I, Phukan AK, Braunschweig H. Synthesis and Trapping of Iminoboranes by M=B/C=N Bond Metathesis. Angew Chem Int Ed Engl 2017; 56:7975-7979. [DOI: 10.1002/anie.201703324] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Marco Nutz
- 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
| | - Bitupon Borthakur
- Department of Chemical Sciences; Tezpur University; Napaam 784028 Assam India
| | - Rian D. Dewhurst
- 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
| | - Andrea Deißenberger
- 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
| | - Marius Schäfer
- 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
| | - Ivo Krummenacher
- 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
| | - Ashwini K. Phukan
- Department of Chemical Sciences; Tezpur University; Napaam 784028 Assam India
| | - 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
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20
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21
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Shi YG, Wang X, Wang N, Peng T, Wang S. Influence of Extended Conjugation on Photophysical/Electronic Properties and Photoelimination of BN-Heterocycles. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00290] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yong-gang Shi
- Beijing
Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials,
School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Xiang Wang
- Department
of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Nan Wang
- Beijing
Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials,
School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Tai Peng
- Beijing
Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials,
School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
| | - Suning Wang
- Beijing
Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials,
School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
- Department
of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
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22
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Braunschweig H, Dewhurst RD, Ewing WC, Kuntze-Fechner MW, Schäfer M. Isolation of a Reactive Cyclopropane Intermediate via a Unique Catalyst-Free Spontaneous Cyclopropanation Step at 0 °C. Chemistry 2017; 23:5953-5956. [PMID: 28052543 DOI: 10.1002/chem.201605514] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Indexed: 01/02/2023]
Abstract
A remarkably mild, catalyst-free cyclopropanation reaction is confirmed by low-temperature isolation of a fused bicyclic cyclopropane intermediate. This intermediate is one of two that were isolated and fully characterised in a three-step temperature-controllable reaction cascade.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institut für Nachhaltige Chemie & Katalyse mit Bor, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rian D Dewhurst
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institut für Nachhaltige Chemie & Katalyse mit Bor, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - William C Ewing
- Boron Specialties LLC, 2301 Duss Ave, Ambridge, PA, 15003, USA
| | - Maximilian W Kuntze-Fechner
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institut für Nachhaltige Chemie & Katalyse mit Bor, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marius Schäfer
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institut für Nachhaltige Chemie & Katalyse mit Bor, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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23
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Zhao P, Nettleton DO, Karki RG, Zécri FJ, Liu SY. Medicinal Chemistry Profiling of Monocyclic 1,2-Azaborines. ChemMedChem 2017; 12:358-361. [PMID: 28181424 PMCID: PMC5654323 DOI: 10.1002/cmdc.201700047] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 11/08/2022]
Abstract
The first examples of biologically active monocyclic 1,2-azaborines have been synthesized and demonstrated to exhibit not only improved in vitro aqueous solubility in comparison with their corresponding carbonaceous analogues, but in the context of a CDK2 inhibitor, also improved biological activity and better in vivo oral bioavailability. This proof-of-concept study establishes the viability of monocyclic 1,2-azaborines as a novel pharmacophore with distinct pharmacological profiles that can help address challenges associated with solubility in drug development research.
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Affiliation(s)
- Peng Zhao
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA),
| | - David O. Nettleton
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Rajeshri G. Karki
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Frédéric J. Zécri
- Novartis Institutes for Biomedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139 (USA),
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467 (USA),
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24
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Lorenz T, Crumbach M, Eckert T, Lik A, Helten H. Poly(p
-phenyleniminoboran): ein Bor-Stickstoff-Analogon von Poly(p
-phenylenvinylen). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612476] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Thomas Lorenz
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Merian Crumbach
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Thomas Eckert
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Deutschland
| | - Artur Lik
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Holger Helten
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
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25
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Lorenz T, Crumbach M, Eckert T, Lik A, Helten H. Poly(p
-phenylene iminoborane): A Boron-Nitrogen Analogue of Poly(p
-phenylene vinylene). Angew Chem Int Ed Engl 2017; 56:2780-2784. [DOI: 10.1002/anie.201612476] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Indexed: 01/27/2023]
Affiliation(s)
- Thomas Lorenz
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Merian Crumbach
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Thomas Eckert
- Institute of Physical Chemistry; RWTH Aachen University; Landoltweg 2 52056 Aachen Germany
| | - Artur Lik
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Holger Helten
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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26
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Kong L, Lu W, Li Y, Ganguly R, Kinjo R. Azaborabutadienes: Synthesis by Metal-Free Carboboration of Nitriles and Utility as Building Blocks for B,N-Heterocycles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608994] [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)
- Lingbing Kong
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Nanyang Link 21 Singapore 637371 Singapore
| | - Wei Lu
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Nanyang Link 21 Singapore 637371 Singapore
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Nanyang Link 21 Singapore 637371 Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Nanyang Link 21 Singapore 637371 Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Nanyang Link 21 Singapore 637371 Singapore
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27
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Kong L, Lu W, Li Y, Ganguly R, Kinjo R. Azaborabutadienes: Synthesis by Metal‐Free Carboboration of Nitriles and Utility as Building Blocks for B,N‐Heterocycles. Angew Chem Int Ed Engl 2016; 55:14718-14722. [DOI: 10.1002/anie.201608994] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/06/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Lingbing Kong
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
| | - Wei Lu
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
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28
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Ayhan O, Eckert T, Plamper FA, Helten H. Poly(iminoborane)s: An Elusive Class of Main-Group Polymers? Angew Chem Int Ed Engl 2016; 55:13321-13325. [DOI: 10.1002/anie.201607131] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 08/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Ozan Ayhan
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Thomas Eckert
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Germany
| | - Felix A. Plamper
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Germany
| | - Holger Helten
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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29
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Ayhan O, Eckert T, Plamper FA, Helten H. Poly(iminoborane): Eine schwer fassbare Klasse von anorganischen Hauptgruppenpolymeren? Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607131] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ozan Ayhan
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
| | - Thomas Eckert
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Deutschland
| | - Felix A. Plamper
- Institut für Physikalische Chemie; RWTH Aachen University; Landoltweg 2 52056 Aachen Deutschland
| | - Holger Helten
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52056 Aachen Deutschland
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30
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Hertz VM, Massoth JG, Bolte M, Lerner HW, Wagner M. En Route to Stimuli-Responsive Boron-, Nitrogen-, and Sulfur-Doped Polycyclic Aromatic Hydrocarbons. Chemistry 2016; 22:13181-8. [DOI: 10.1002/chem.201602406] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Valentin M. Hertz
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany), Fax: (+49) 69-798-29260
| | - Julian G. Massoth
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany), Fax: (+49) 69-798-29260
| | - Michael Bolte
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany), Fax: (+49) 69-798-29260
| | - Hans-Wolfram Lerner
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany), Fax: (+49) 69-798-29260
| | - Matthias Wagner
- Institut für Anorganische und Analytische Chemie; Goethe-Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany), Fax: (+49) 69-798-29260
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31
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Helten H. B=N Units as Part of Extended π-Conjugated Oligomers and Polymers. Chemistry 2016; 22:12972-82. [DOI: 10.1002/chem.201602665] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Holger Helten
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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Liu X, Zhang Y, Li B, Zakharov LN, Vasiliu M, Dixon DA, Liu SY. A Modular Synthetic Approach to Monocyclic 1,4-Azaborines. Angew Chem Int Ed Engl 2016; 55:8333-7. [PMID: 27238094 DOI: 10.1002/anie.201602840] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 11/07/2022]
Abstract
A simple and general method for the synthesis of a wide range of monocyclic 1,4-azaborines, including the first examples containing B heteroatoms is described. Post-heterocycle-formation olefin isomerization was employed as a key strategy. This new synthetic method provides fundamental insight into the resonance stabilization and photophysical properties of 1,4-azaborines.
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Affiliation(s)
- Xuguang Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA.,College of Chemistry and Chemical Engineering, Tianjin University of Technology, China
| | - Yuanzhe Zhang
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Bo Li
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | | | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA.
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA.
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33
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Liu X, Zhang Y, Li B, Zakharov LN, Vasiliu M, Dixon DA, Liu S. A Modular Synthetic Approach to Monocyclic 1,4‐Azaborines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602840] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xuguang Liu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
- College of Chemistry and Chemical Engineering Tianjin University of Technology China
| | - Yuanzhe Zhang
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | - Bo Li
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | | | - Monica Vasiliu
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Shih‐Yuan Liu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
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Schäfer M, Schäfer J, Dewhurst RD, Ewing WC, Krahfuß M, Kuntze-Fechner MW, Wehner M, Lambert C, Braunschweig H. Regioselective Catalytic and Stepwise Routes to Bulky, Functional-Group-Appended, and Luminescent 1,2-Azaborinines. Chemistry 2016; 22:8603-9. [PMID: 27166798 DOI: 10.1002/chem.201600653] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Indexed: 01/01/2023]
Abstract
The regioselective syntheses of 1,2-azaborinines is achieved using an unsymmetrical iminoborane through both catalytic and stepwise modular routes. The 1,2-azaborinine ring can be selectively functionalized in the 4- and/or 6-position through control of the stepwise reaction sequence, allowing access to vinyl-functionalized and redox-active, luminescent, donor-functionalized 1,2-azaborinines. The electrochemistry and photochemistry of a tetraarylamine-substituted 1,2-azaborinine are studied. Cyclic voltammetry of this compound, relative to a non-B,N-substituted reference molecule, showed an additional oxidation wave assigned to the oxidation of the azaborinine ring, while emission spectroscopy indicated that the azaborinine was significantly more fluorescent than the reference.
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Affiliation(s)
- Marius Schäfer
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Julian Schäfer
- Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Institut für Organische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rian D Dewhurst
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - William C Ewing
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Mirjam Krahfuß
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Maximilian W Kuntze-Fechner
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marius Wehner
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Lambert
- Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Institut für Organische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.
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Lorenz T, Lik A, Plamper FA, Helten H. Dehydrokupplungs- und Silazanspaltungsrouten zu organisch-anorganischen Hybridpolymeren mit NBN-Einheiten in der Hauptkette. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602342] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas Lorenz
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
| | - Artur Lik
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
| | - Felix A. Plamper
- Institut für Physikalische Chemie; RWTH Aachen; Landoltweg 2 52056 Aachen Deutschland
| | - Holger Helten
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
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36
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Lorenz T, Lik A, Plamper FA, Helten H. Dehydrocoupling and Silazane Cleavage Routes to Organic-Inorganic Hybrid Polymers with NBN Units in the Main Chain. Angew Chem Int Ed Engl 2016; 55:7236-41. [PMID: 27151314 DOI: 10.1002/anie.201602342] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Indexed: 11/10/2022]
Abstract
Despite the great potential of both π-conjugated organoboron polymers and BN-doped polycyclic aromatic hydrocarbons in organic optoelectronics, our knowledge of conjugated polymers with B-N bonds in their main chain is currently scarce. Herein, the first examples of a new class of organic-inorganic hybrid polymers are presented, which consist of alternating NBN and para-phenylene units. Polycondensation with B-N bond formation provides facile access to soluble materials under mild conditions. The photophysical data for the polymer and molecular model systems of different chain lengths reveal a low extent of π-conjugation across the NBN units, which is supported by DFT calculations. The applicability of the new polymers as macromolecular polyligands is demonstrated by a cross-linking reaction with Zr(IV) .
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Affiliation(s)
- Thomas Lorenz
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Artur Lik
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Felix A Plamper
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056, Aachen, Germany
| | - Holger Helten
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany.
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37
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Wang S, Yang DT, Lu J, Shimogawa H, Gong S, Wang X, Mellerup SK, Wakamiya A, Chang YL, Yang C, Lu ZH. In-situ-Bildung von (BN)2-Pyrenen und elektrolumineszierenden Elementen im Festkörper. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507770] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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38
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Wang S, Yang DT, Lu J, Shimogawa H, Gong S, Wang X, Mellerup SK, Wakamiya A, Chang YL, Yang C, Lu ZH. In Situ Solid-State Generation of (BN)2 -Pyrenes and Electroluminescent Devices. Angew Chem Int Ed Engl 2015; 54:15074-8. [PMID: 26482862 DOI: 10.1002/anie.201507770] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Indexed: 11/08/2022]
Abstract
New BN-heterocyclic compounds have been found to undergo double arene photoelimination, forming rare yellow fluorescent BN-pyrenes that contain two BN units. Most significant is the discovery that the double arene elimination can also be driven by excitons generated electrically within electroluminescent (EL) devices, enabling the in situ solid-state conversion of BN-heterocycles to BN-pyrenes and the use of BN-pyrenes as emitters for EL devices. The in situ exciton-driven elimination (EDE) phenomenon has also been observed for other BN-heterocycles.
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Affiliation(s)
- Suning Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology, Beijing 100081 (P.R. China). , .,Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6 (Canada). ,
| | - Deng-Tao Yang
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6 (Canada)
| | - Jiasheng Lu
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6 (Canada)
| | - Hiroyuki Shimogawa
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan)
| | - Shaolong Gong
- Department of Materials Sciences and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 (Canada). .,Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072 (China).
| | - Xiang Wang
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6 (Canada)
| | - Soren K Mellerup
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6 (Canada)
| | - Atsushi Wakamiya
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011 (Japan)
| | - Yi-Lu Chang
- Department of Materials Sciences and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 (Canada)
| | - Chuluo Yang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072 (China)
| | - Zheng-Hong Lu
- Department of Materials Sciences and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4 (Canada).
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39
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Sagan F, Piękoś Ł, Andrzejak M, Mitoraj MP. From Saturated BN Compounds to Isoelectronic BN/CC Counterparts: An Insight from Computational Perspective. Chemistry 2015; 21:15299-307. [DOI: 10.1002/chem.201502629] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Indexed: 11/08/2022]
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40
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Barnard JH, Brown PA, Shuford KL, Martin CD. 1,2-Phosphaborines: Hybrid Inorganic/Organic P-B Analogues of Benzene. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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Barnard JH, Brown PA, Shuford KL, Martin CD. 1,2-Phosphaborines: Hybrid Inorganic/Organic P-B Analogues of Benzene. Angew Chem Int Ed Engl 2015; 54:12083-6. [DOI: 10.1002/anie.201507003] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Indexed: 11/06/2022]
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42
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McDonald SM, Mellerup SK, Peng J, Yang D, Li Q, Wang S. Thermal and Photolytic Transformation of NHC–B,N‐Heterocycles: Controlled Generation of Blue Fluorescent 1,3‐Azaborinine Derivatives and 1
H
‐Imidazo[1,2‐a]indoles by External Stimuli. Chemistry 2015; 21:13961-70. [DOI: 10.1002/chem.201502385] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Indexed: 01/07/2023]
Affiliation(s)
- Sean M. McDonald
- Department of Chemistry, Queen's University, Kingston, Ontario, K7M 3N6 (Canada)
| | - Soren K. Mellerup
- Department of Chemistry, Queen's University, Kingston, Ontario, K7M 3N6 (Canada)
| | - Jinbao Peng
- Department of Chemistry, Queen's University, Kingston, Ontario, K7M 3N6 (Canada)
| | - Dengtao Yang
- Department of Chemistry, Queen's University, Kingston, Ontario, K7M 3N6 (Canada)
| | - Quan‐Song Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion, Materials, School of Chemistry, Beijing Institute of Technology, Beijing, 100081 (P.R. China)
| | - Suning Wang
- Department of Chemistry, Queen's University, Kingston, Ontario, K7M 3N6 (Canada)
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion, Materials, School of Chemistry, Beijing Institute of Technology, Beijing, 100081 (P.R. China)
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43
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Pietsch S, Neeve EC, Apperley DC, Bertermann R, Mo F, Qiu D, Cheung MS, Dang L, Wang J, Radius U, Lin Z, Kleeberg C, Marder TB. Synthesis, Structure, and Reactivity of Anionic sp2-sp3Diboron Compounds: Readily Accessible Boryl Nucleophiles. Chemistry 2015; 21:7082-98. [DOI: 10.1002/chem.201500235] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Indexed: 01/20/2023]
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44
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Braunschweig H, Celik MA, Hupp F, Krummenacher I, Mailänder L. Formation of BN Isosteres of Azo Dyes by Ring Expansion of Boroles with Azides. Angew Chem Int Ed Engl 2015; 54:6347-51. [PMID: 25808881 DOI: 10.1002/anie.201500970] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Indexed: 11/08/2022]
Abstract
Herein, we present the results of our investigations on the effect of ortho substitution of aryl azides on the ring-expansion reaction of boroles, five-membered unsaturated boron heterocycles. These studies led to the isolation of the first 1,2-azaborinine-substituted azo dyes, which are bright yellow solids. One of the derivatives, (E)-2-mesityl-1-(mesityldiazenyl)-3,4,5,6-tetraphenyl-1,2-azaborinine, was found to be unstable in solution and to transform through a Jacobsen-like reaction into an indazole and 1-hydro-1,2-azaborinine. DFT calculations were performed to shed light on possible mechanisms to rationalize the unexpected azo-azaborinine formation and to draw conclusions about the role played by the ortho substituents in the reaction.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/.
| | - Mehmet Ali Celik
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/
| | - Florian Hupp
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/
| | - Ivo Krummenacher
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/
| | - Lisa Mailänder
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.ak-braunschweig.chemie.uni-wuerzburg.de/
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Braunschweig H, Celik MA, Hupp F, Krummenacher I, Mailänder L. Synthese BN-isosterer Verbindungen von Azofarbstoffen durch Ringerweiterung von Borolen mit Aziden. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500970] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Braunschweig H, Ewing WC, Geetharani K, Schäfer M. The Reactivities of Iminoboranes with Carbenes: BN Isosteres of Carbene-Alkyne Adducts. Angew Chem Int Ed Engl 2014; 54:1662-5. [DOI: 10.1002/anie.201409699] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Indexed: 11/05/2022]
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47
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Braunschweig H, Ewing WC, Geetharani K, Schäfer M. Verschiedene Reaktivitäten von Iminoboranen gegenüber Carbenen: BN-Isostere von Carben-Alkin-Addukten. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409699] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Baranac-Stojanović M. Aromaticity and Stability of Azaborines. Chemistry 2014; 20:16558-65. [DOI: 10.1002/chem.201402851] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 08/30/2014] [Indexed: 11/06/2022]
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49
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Holzmeier F, Lang M, Hemberger P, Bodi A, Schäfer M, Dewhurst RD, Braunschweig H, Fischer I. Photoionization and pyrolysis of a 1,4-azaborinine: retro-hydroboration in the cation and identification of novel organoboron ring systems. Chemistry 2014; 20:9683-92. [PMID: 24976576 DOI: 10.1002/chem.201402884] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Indexed: 12/30/2022]
Abstract
The photoionization and dissociative photoionization of 1,4-di-tert-butyl-1,4-azaborinine by means of synchrotron radiation and threshold photoelectron photoion coincidence spectroscopy is reported. The ionization energy of the compound was determined to be 7.89 eV. Several low-lying electronically excited states in the cation were identified. The various pathways for dissociative photoionization were modeled by statistical theory, and appearance energies AE0K were obtained. The loss of isobutene in a retro-hydroboration reaction is the dominant pathway, which proceeds with a reverse barrier. Pyrolysis of the parent compound in a chemical reactor leads to the generation of several yet unobserved boron compounds. The ionization energies of the C4 H6 BN isomers 1,2- and 1,4-dihydro-1,4-azaborinine and the C3 H6 BN isomer 1,2-dihydro-1,3-azaborole were determined from threshold photoelectron spectra.
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Affiliation(s)
- Fabian Holzmeier
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg (Germany)
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50
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Xu S, Haeffner F, Li B, Zakharov LN, Liu SY. Monobenzofused 1,4-Azaborines: Synthesis, Characterization, and Discovery of a Unique Coordination Mode. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403903] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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