1
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Wang Y, Zhang X, Han J, Li Q, Wei R, Ruiz DA, Liu LL, Tung C, Kong L. Crystalline Neutral Diboron Analogues of Cyclopropanes. Angew Chem Int Ed Engl 2022; 61:e202117053. [DOI: 10.1002/anie.202117053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Wang
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Jixing Han
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Qianli Li
- School of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 P. R. China
| | - Rui Wei
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - David A. Ruiz
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Chen‐Ho Tung
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
| | - Lingbing Kong
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China
- State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China
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2
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Wang Y, Zhang X, Han J, Li Q, Wei R, Ruiz DA, Liu LL, Tung CH, Kong L. Crystalline Neutral Diboron Analogues of Cyclopropanes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yu Wang
- Shandong University School of Chemistry and Chemical Engineering CHINA
| | - Xin Zhang
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Jixing Han
- Shandong University School of Chemistry and Chemical Engineering CHINA
| | - Qianli Li
- Liaocheng University Department of Chemistry and Chemical Engineering CHINA
| | - Rui Wei
- Southern University of Science and Technology Department of Chemistry CHINA
| | - David A Ruiz
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Liu Leo Liu
- Southern University of Science and Technology Department of Chemistry CHINA
| | - Chen-Ho Tung
- Shandong University School of Chemistry and Chemical Engineering CHINA
| | - Lingbing Kong
- Shandong University School of Chemistry and Chemical Engineering 27 Shanda Nanlu 250100 Jinan CHINA
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3
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Englert L, Schmidt U, Dömling M, Passargus M, Stennett TE, Hermann A, Arrowsmith M, Härterich M, Müssig J, Phillipps A, Prieschl D, Rempel A, Rohm F, Radacki K, Schorr F, Thiess T, Jiménez-Halla JOC, Braunschweig H. Reactions of diborenes with terminal alkynes: mechanisms of ligand-controlled anti-selective hydroalkynylation, cycloaddition and C[triple bond, length as m-dash]C triple bond scission. Chem Sci 2021; 12:9506-9515. [PMID: 34349926 PMCID: PMC8314202 DOI: 10.1039/d1sc02081a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/02/2021] [Indexed: 01/03/2023] Open
Abstract
The reactions of terminal acetylenes with doubly Lewis base-stabilised diborenes resulted in different outcomes depending on the nature of the ligands at boron and the conformation of the diborene (cyclic versus acyclic). N-heterocyclic carbene (NHC)-stabilised diborenes tended to undergo anti-selective hydroalkynylation at room temperature, whereas [2 + 2] cycloaddition was observed at higher temperatures, invariably followed by a C–N bond activation at one NHC ligand, leading to the ring-expansion of the initially formed BCBC ring and formation of novel boron-containing heterocycles. For phosphine-stabilised diborenes only [2 + 2] cycloaddition was observed, followed by a rearrangement of the resulting 1,2-dihydro-1,2-diborete to the corresponding 1,3-isomer, which amounts to complete scission of both the B
Created by potrace 1.16, written by Peter Selinger 2001-2019
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B double and CC triple bonds of the reactants. The elusive 1,2-isomer was finally trapped by using a cyclic phosphine-stabilised diborene, which prevented rearrangement to the 1,3-isomer. Extensive density functional theory (DFT) calculations provide a rationale for the selectivity observed. The outcome of reactions between diborenes and terminal alkynes can be tuned by varying the stabilising Lewis base and/or reaction conditions, to yield either the anti-hydroalkynylation product or [2 + 2] cycloaddition-derived boron heterocycles.![]()
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Affiliation(s)
- Lukas Englert
- 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
| | - Uwe Schmidt
- 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 Dömling
- 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
| | - Max Passargus
- 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
| | - Tom E Stennett
- 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
| | - 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
| | - 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
| | - Marcel Härterich
- 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
| | - Jonas Müssig
- 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
| | - Alexandra Phillipps
- 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
| | - Dominic 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
| | - 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
| | - Felix Rohm
- 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
| | - Krzysztof Radacki
- 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
| | - Fabian Schorr
- 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
| | - Torsten Thiess
- 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
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4
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Brückner T, Fantuzzi F, Stennett TE, Krummenacher I, Dewhurst RD, Engels B, Braunschweig H. Isolierung neutraler, mono‐ und dikationischer B
2
P
2
‐Ringe durch Addition eines Diphosphans an eine Bor‐Bor‐Dreifachbindung. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tobias Brückner
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Felipe Fantuzzi
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für Physikalische und Theoretische Chemie Julius-Maximilians-Universität Würzburg Emil-Fischer-Straße 42 97074 Würzburg Deutschland
| | - Tom E. Stennett
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Ivo Krummenacher
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Rian D. Dewhurst
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie Julius-Maximilians-Universität Würzburg Emil-Fischer-Straße 42 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
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5
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Brückner T, Fantuzzi F, Stennett TE, Krummenacher I, Dewhurst RD, Engels B, Braunschweig H. Isolation of Neutral, Mono-, and Dicationic B 2 P 2 Rings by Diphosphorus Addition to a Boron-Boron Triple Bond. Angew Chem Int Ed Engl 2021; 60:13661-13665. [PMID: 33844394 PMCID: PMC8252364 DOI: 10.1002/anie.202102218] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/09/2021] [Indexed: 01/10/2023]
Abstract
The NHC-stabilised diboryne (B2 (SIDep)2 ; SIDep=1,3-bis(2,6-diethylphenyl)imidazolin-2-ylidene) undergoes a high-yielding P-P bond activation with tetraethyldiphosphine at room temperature to form a B2 P2 heterocycle via a diphosphoryldiborene by 1,2-diphosphination. The heterocycle can be oxidised to a radical cation and a dication, respectively, depending on the oxidant used and its counterion. Starting from the planar, neutral 1,3-bis(alkylidene)-1,3-diborata-2,4-diphosphoniocyclobutane, each oxidation step leads to decreased B-B distances and loss of planarity by cationisation. X-ray analyses in conjunction with DFT and CASSCF/NEVPT2 calculations reveal closed-shell singlet, butterfly-shaped structures for the NHC-stabilised dicationic B2 P2 rings, with their diradicaloid, planar-ring isomers lying close in energy.
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Affiliation(s)
- Tobias Brückner
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
| | - Felipe Fantuzzi
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Strasse 42, 97074, Würzburg, Germany
| | - Tom E Stennett
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
| | - Rian D Dewhurst
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
| | - Bernd Engels
- Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Strasse 42, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
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6
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Brückner T, Heß M, Stennett TE, Rempel A, Braunschweig H. Synthesis of Boron Analogues of Enamines via Hydroamination of a Boron-Boron Triple Bond. Angew Chem Int Ed Engl 2021; 60:736-741. [PMID: 33058434 PMCID: PMC7839459 DOI: 10.1002/anie.202012101] [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: 09/04/2020] [Revised: 10/14/2020] [Indexed: 01/24/2023]
Abstract
An N-heterocyclic-carbene-stabilized diboryne undergoes rapid, high-yielding and catalyst-free hydroamination reactions with primary amines, yielding 1-amino-2-hydrodiborenes, which can be considered boron analogues of enamines. The electronics of the organic substituent at nitrogen influence the structure and further reactivity of the diborene product. With electron-rich anilines, a second hydroamination can occur at the diborene to generate 1,1-diamino-2,2-dihydrodiboranes. With isopropylamine, the electronic influence of the alkyl substituent upon the diborene leads to an unprecedented boron-mediated intramolecular N-dearylation reaction of an N-heterocyclic carbene unit.
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Affiliation(s)
- Tobias Brückner
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
| | - Merlin Heß
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
| | - Tom E. Stennett
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
| | - Anna Rempel
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97070WürzburgGermany
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7
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Brückner T, Heß M, Stennett TE, Rempel A, Braunschweig H. Herstellung von Boranaloga von Enaminen über Hydroaminierung einer Bor‐Bor‐Dreifachbindung. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tobias Brückner
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für nachhaltige Chemie & Katalyse mit Bor Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Merlin Heß
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für nachhaltige Chemie & Katalyse mit Bor Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Tom E. Stennett
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für nachhaltige Chemie & Katalyse mit Bor Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Anna Rempel
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für nachhaltige Chemie & Katalyse mit Bor Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institut für nachhaltige Chemie & Katalyse mit Bor Julius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
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8
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Weetman C, Porzelt A, Bag P, Hanusch F, Inoue S. Dialumenes - aryl vs. silyl stabilisation for small molecule activation and catalysis. Chem Sci 2020; 11:4817-4827. [PMID: 34122939 PMCID: PMC8159210 DOI: 10.1039/d0sc01561j] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Main group multiple bonds have proven their ability to act as transition metal mimics in the last few decades. However, catalytic application of these species is still in its infancy. Herein we report the second neutral NHC-stabilised dialumene species by use of a supporting aryl ligand (3). Different to the trans-planar silyl-substituted dialumene (3Si), compound 3 features a trans-bent and twisted geometry. The differences between the two dialumenes are explored computationally (using B3LYP-D3/6-311G(d)) as well as experimentally. A high influence of the ligand's steric demand on the structural motif is revealed, giving rise to enhanced reactivity of 3 enabled by a higher flexibility in addition to different polarisation of the aluminium centres. As such, facile activation of dihydrogen is now achievable. The influence of ligand choice is further implicated in two different catalytic reactions; not only is the aryl-stabilised dialumene more catalytically active but the resulting product distributions also differ, thus indicating the likelihood of alternate mechanisms simply through a change of supporting ligand. Ligand controlled reactivity: a trans-bent and twisted geometry enables dihydrogen activation and enhanced catalytic activity for NHC-stabilised dialumenes.![]()
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Affiliation(s)
- Catherine Weetman
- Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technische Universität München Lichtenbergstra βe 4 85748 Garching bei München Germany
| | - Amelie Porzelt
- Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technische Universität München Lichtenbergstra βe 4 85748 Garching bei München Germany
| | - Prasenjit Bag
- Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technische Universität München Lichtenbergstra βe 4 85748 Garching bei München Germany
| | - Franziska Hanusch
- Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technische Universität München Lichtenbergstra βe 4 85748 Garching bei München Germany
| | - Shigeyoshi Inoue
- Department of Chemistry, Catalysis Research Center and Institute of Silicon Chemistry, Technische Universität München Lichtenbergstra βe 4 85748 Garching bei München Germany
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9
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Schmidt U, Werner L, Arrowsmith M, Deissenberger A, Hermann A, Hofmann A, Ullrich S, Mattock JD, Vargas A, Braunschweig H. trans-Selective Insertional Dihydroboration of a cis-Diborene: Synthesis of Linear sp 3 -sp 2 -sp 3 -Triboranes and Subsequent Cationization. Angew Chem Int Ed Engl 2020; 59:325-329. [PMID: 31621993 PMCID: PMC6972689 DOI: 10.1002/anie.201911645] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 12/11/2022]
Abstract
The reaction of aryl- and amino(dihydro)boranes with dibora[2]ferrocenophane 1 leads to the formation 1,3-trans-dihydrotriboranes by formal hydrogenation and insertion of a borylene unit into the B=B bond. The aryltriborane derivatives undergo reversible photoisomerization to the cis-1,2-μ-H-3-hydrotriboranes, while hydride abstraction affords cationic triboranes, which represent the first doubly base-stabilized B3 H4 + analogues.
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Affiliation(s)
- Uwe Schmidt
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Luis Werner
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Merle Arrowsmith
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Andrea Deissenberger
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexander Hermann
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexander Hofmann
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - Stefan Ullrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
| | - James D Mattock
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK
| | - Alfredo Vargas
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Wüzburg, Am Hubland, 97074, Würzburg, Germany
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10
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Schmidt U, Werner L, Arrowsmith M, Deissenberger A, Hermann A, Hofmann A, Ullrich S, Mattock JD, Vargas A, Braunschweig H. Trans
‐selektive Dihydroborierung eines
cis
‐Diborens durch Insertion: Synthese eines linearen sp
3
‐sp
2
‐sp
3
‐Triborans und anschließende Kationisierung. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Uwe Schmidt
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Luis Werner
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Merle Arrowsmith
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Andrea Deissenberger
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Alexander Hermann
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Alexander Hofmann
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - Stefan Ullrich
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
| | - James D. Mattock
- Department of Chemistry School of Life Sciences University of Sussex Brighton BN1 9QJ Sussex Großbritannien
| | - Alfredo Vargas
- Department of Chemistry School of Life Sciences University of Sussex Brighton BN1 9QJ Sussex Großbritannien
| | - Holger Braunschweig
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor Julius-Maximilians-Universität Wüzburg Am Hubland 97074 Würzburg Deutschland
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11
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Brückner T, Stennett TE, Heß M, Braunschweig H. Single and Double Hydroboration of B-B Triple Bonds and Convergent Routes to a Cationic Tetraborane. J Am Chem Soc 2019; 141:14898-14903. [PMID: 31454483 DOI: 10.1021/jacs.9b07991] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A compound with a boron-boron triple bond is shown to undergo stepwise hydroboration reactions with catecholborane to yield an unsymmetrical hydro(boryl)diborene and a 2,3-dihydrotetraborane. Abstraction of H- from the latter compound produces an unusual cationic, planar tetraborane with a hydrogen atom bridging the central B2 moiety. Spectroscopic and crystallographic data and DFT calculations support a "protonated diborene" structure for this compound, which can also be accessed via direct protonation of the corresponding diborene.
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