1
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Vashisth K, Dutta S, Akram MO, Martin CD. Examining the reactivity of tris( ortho-carboranyl)borane with Lewis bases and application in frustrated Lewis pair Si-H bond cleavage. Dalton Trans 2023. [PMID: 37377440 DOI: 10.1039/d3dt01557b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Reactions of tris(ortho-carboranyl)borane with Lewis bases reveals only small bases bind. The tremendous bulk and Lewis acidity is leveraged in frustrated Lewis pair Si-H cleavage with a wider range of Lewis bases and greater efficacy than B(C6F5)3.
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Affiliation(s)
- Kanika Vashisth
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, USA.
| | - Sanjay Dutta
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, USA.
| | - Manjur O Akram
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, USA.
| | - Caleb D Martin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, USA.
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2
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Jie X, Chen C, Daniliuc CG, Kehr G, Erker G. Boraalkenes Made by a Hydroboration Route: Cycloaddition and B=C Bond Cleavage Reactions. Angew Chem Int Ed Engl 2023; 62:e202214700. [PMID: 36433899 DOI: 10.1002/anie.202214700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/21/2022] [Accepted: 11/23/2022] [Indexed: 11/28/2022]
Abstract
Hydroboration of styrene or vinylcyclohexane with the IMes(C6 F5 )BH+ cation followed by deprotonation provided a convenient synthetic entry to the [B]=CHCH2 R boraalkenes 9 a and 9 b. The in situ generated IMes(SCN)BH+ system reacted similarly with 1,1-diphenylethene followed by deprotonation to give the isothiocyanato substituted boraalkene 9 c. The boraalkenes underwent [2+2] cycloaddition reactions with a small series of heterocumulenes to give the respective four-membered heterocycles. The [B]=CHCH2 R+CO2 cycloadducts 13 a and 13 b added the borane HB(C6 F5 )2 with cleavage of the central B-C σ-bond. CS2 underwent an unusual reaction with the boraalkenes, namely insertion into the B=C bond with formation of the borylated dithioketene acetal under complete rupture of the strong B=C double bond. The intermediate dithiobora-β-lactone type intermediate was isolated in the case of the isothiocyanato-boraalkene reaction and characterized by X-ray diffraction.
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Affiliation(s)
- Xiaoming Jie
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany.,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
| | - Chaohuang Chen
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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3
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Akram MO, Tidwell JR, Dutton JL, Martin CD. Tris(ortho-carboranyl)borane: An Isolable, Halogen-Free, Lewis Superacid. Angew Chem Int Ed Engl 2022; 61:e202212073. [PMID: 36135949 PMCID: PMC9828388 DOI: 10.1002/anie.202212073] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Indexed: 01/12/2023]
Abstract
The synthesis of tris(ortho-carboranyl)borane (BoCb3 ), a single site neutral Lewis superacid, in one pot from commercially available materials is achieved. The high fluoride ion affinity (FIA) confirms its classification as a Lewis superacid and the Gutmann-Beckett method as well as adducts with Lewis bases indicate stronger Lewis acidity over the widely used fluorinated aryl boranes. The electron withdrawing effect of ortho-carborane and lack of pi-delocalization of the LUMO rationalize the unusually high Lewis acidity. Catalytic studies indicate that BoCb3 is a superior catalyst for promoting C-F bond functionalization reactions than tris(pentafluorophenyl)borane [B(C6 F5 )3 ].
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Affiliation(s)
- Manjur O. Akram
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place #97348WacoTX 76798USA
| | - John R. Tidwell
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place #97348WacoTX 76798USA
| | - Jason L. Dutton
- Department of Biochemistry and ChemistryLa Trobe Institute for Molecular ScienceLa Trobe UniversityMelbourneVictoria3086Australia
| | - Caleb D. Martin
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place #97348WacoTX 76798USA
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4
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Ando N, Yamada T, Narita H, Oehlmann NN, Wagner M, Yamaguchi S. Boron-Doped Polycyclic π-Electron Systems with an Antiaromatic Borole Substructure That Forms Photoresponsive B–P Lewis Adducts. J Am Chem Soc 2021; 143:9944-9951. [DOI: 10.1021/jacs.1c04251] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Naoki Ando
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Takuya Yamada
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Hiroki Narita
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Niels N. Oehlmann
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt, Max-von-Laue-Strasse 7, 60438 Frankfurt (Main), Germany
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8601, Japan
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5
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Su X, Bartholome TA, Tidwell JR, Pujol A, Yruegas S, Martinez JJ, Martin CD. 9-Borafluorenes: Synthesis, Properties, and Reactivity. Chem Rev 2021; 121:4147-4192. [DOI: 10.1021/acs.chemrev.0c01068] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiaojun Su
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Tyler A. Bartholome
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - John R. Tidwell
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Alba Pujol
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Sam Yruegas
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Jesse J. Martinez
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Caleb D. Martin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
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6
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He J, Rauch F, Krummenacher I, Braunschweig H, Finze M, Marder TB. Two derivatives of phenylpyridyl-fused boroles with contrasting electronic properties: decreasing and enhancing the electron accepting ability. Dalton Trans 2021; 50:355-361. [PMID: 33320139 DOI: 10.1039/d0dt03619f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two derivatives of phenylpyridyl-fused boroles were prepared via functionalization of the pyridyl groups, namely to an electron-rich dihydropyridine moiety (compound 1) and an electron-deficient N-methylpyridinium cation (compound 2). Due to strong conjugation between the dihydropyridine moiety and the boron atom, the reduction potential of compound 1 shifts cathodically. In contrast, compound 2 exhibits three reduction processes with a first reversible reduction potential anodically shifted in comparison to its precursor (TipPBB2) or the non-borylated framework 1-methyl-2-phenylpyridin-1-ium triflate (3). The significantly anodically shifted reduction potential indicates the extreme electron deficiency of compound 2, which also leads to the reversible coordination of THF. Photophysical properties of both compounds in different solvents were investigated. Theoretical studies further support the strong conjugation in the ground state of compound 1 and the electron-deficient property of compound 2.
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Affiliation(s)
- Jiang He
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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7
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He J, Rauch F, Finze M, Marder TB. (Hetero)arene-fused boroles: a broad spectrum of applications. Chem Sci 2020; 12:128-147. [PMID: 34163585 PMCID: PMC8178973 DOI: 10.1039/d0sc05676f] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
(Hetero)arene-fused boroles are a class of compounds containing a 5-membered boron diene-ring. Based on their molecular framework, the (hetero)arene-fused boroles can be considered as boron-doped polycyclic antiaromatic hydrocarbons and are thus of great interest. Due to the vacant pz orbital on the 3-coordinate boron atom, the antiaromaticity and strain of the 5-membered borole ring, (hetero)arene-fused boroles possess strong electron accepting abilities and Lewis acidity. By functionalization, they can be tuned to optimize different properties for specific applications. Herein, we summarize synthetic methodologies, different strategies for their functionalization, and applications of (hetero)arene-fused boroles. (Hetero)arene-fused boroles, ‘antiaromatic’ 2n-electron π-systems, more stable and more functionalizable than boroles, offer greater potential for a variety of applications.![]()
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Affiliation(s)
- Jiang He
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Florian Rauch
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Maik Finze
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Todd B Marder
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
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8
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Rauch F, Fuchs S, Friedrich A, Sieh D, Krummenacher I, Braunschweig H, Finze M, Marder TB. Highly Stable, Readily Reducible, Fluorescent, Trifluoromethylated 9-Borafluorenes. Chemistry 2020; 26:12794-12808. [PMID: 31999019 PMCID: PMC7589458 DOI: 10.1002/chem.201905559] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 01/29/2023]
Abstract
Three different perfluoroalkylated borafluorenes (F Bf) were prepared and their electronic and photophysical properties were investigated. The systems have four trifluoromethyl moieties on the borafluorene moiety as well as two trifluoromethyl groups at the ortho positions of their exo-aryl moieties. They differ with regard to the para substituents on their exo-aryl moieties, being a proton (F XylF Bf, F Xyl: 2,6-bis(trifluoromethyl)phenyl), a trifluoromethyl group (F MesF Bf, F Mes: 2,4,6-tris(trifluoromethyl)phenyl) or a dimethylamino group (p-NMe2 -F XylF Bf, p-NMe2 -F Xyl: 4-(dimethylamino)-2,6-bis(trifluoromethyl)phenyl), respectively. All derivatives exhibit extraordinarily low reduction potentials, comparable to those of perylenediimides. The most electron-deficient derivative F MesF Bf was also chemically reduced and its radical anion isolated and characterized. Furthermore, all compounds exhibit very long fluorescent lifetimes of about 250 ns up to 1.6 μs; however, the underlying mechanisms responsible for this differ. The donor-substituted derivative p-NMe2 -F XylF Bf exhibits thermally activated delayed fluorescence (TADF) from a charge-transfer (CT) state, whereas the F MesF Bf and F XylF Bf borafluorenes exhibit only weakly allowed locally excited (LE) transitions due to their symmetry and low transition-dipole moments.
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Affiliation(s)
- Florian Rauch
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Sonja Fuchs
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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9
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Payard PA, Finidori C, Guichard L, Cartigny D, Corbet M, Khrouz L, Bonneviot L, Wischert R, Grimaud L, Pera-Titus M. Rational Optimization of Lewis-Acid Catalysts for the Direct Amination of Alcohols, Part 1 - Activity Descriptors for Metal Triflates and Triflimides. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pierre-Adrien Payard
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Céline Finidori
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Laurélia Guichard
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Damien Cartigny
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Matthieu Corbet
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Lhoussain Khrouz
- Univ Lyon, ENS de Lyon, CNRS UMR 5182; Université Claude Bernard Lyon 1, Laboratoire de Chimie; 46 Allée d'Italie 69342 Lyon France
| | - Laurent Bonneviot
- Univ Lyon, ENS de Lyon, CNRS UMR 5182; Université Claude Bernard Lyon 1, Laboratoire de Chimie; 46 Allée d'Italie 69342 Lyon France
| | - Raphael Wischert
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Laurence Grimaud
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Marc Pera-Titus
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
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10
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Shimizu T, Kawachi A. Synthesis, reactions, and photophysical properties of o-(alkoxysilyl)(borafluorenyl)benzenes. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Ben Saida A, Chardon A, Osi A, Tumanov N, Wouters J, Adjieufack AI, Champagne B, Berionni G. Pushing the Lewis Acidity Boundaries of Boron Compounds With Non‐Planar Triarylboranes Derived from Triptycenes. Angew Chem Int Ed Engl 2019; 58:16889-16893. [DOI: 10.1002/anie.201910908] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Indexed: 01/19/2023]
Affiliation(s)
- Ali Ben Saida
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Aurélien Chardon
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Arnaud Osi
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Nikolay Tumanov
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Johan Wouters
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Abel I. Adjieufack
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Benoît Champagne
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Guillaume Berionni
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
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12
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Ben Saida A, Chardon A, Osi A, Tumanov N, Wouters J, Adjieufack AI, Champagne B, Berionni G. Pushing the Lewis Acidity Boundaries of Boron Compounds With Non‐Planar Triarylboranes Derived from Triptycenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910908] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Ali Ben Saida
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Aurélien Chardon
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Arnaud Osi
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Nikolay Tumanov
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Johan Wouters
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Abel I. Adjieufack
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Benoît Champagne
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
| | - Guillaume Berionni
- Department of ChemistryNamur Institute of Structured MatterUniversity of Namur 5000 Namur Belgium
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13
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Laperriere LE, Yruegas S, Martin CD. Investigating the reactivity of 9-phenyl-9-borafluorene with N H, O H, P H, and S H bonds. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Bartholome TA, Bluer KR, Martin CD. Successive carbene insertion into 9-phenyl-9-borafluorene. Dalton Trans 2019; 48:6319-6322. [PMID: 30942222 DOI: 10.1039/c9dt01032g] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The reactions of 9-phenyl-9-borafluorene with trimethylsilyldiazomethane in a 1 : 1 and 1 : 2 stoichiometry furnished the corresponding BC5 and BC6 heterocycles via the formal insertion of one and two carbene units.
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Affiliation(s)
- Tyler A Bartholome
- Baylor University, Department of Chemistry and Biochemistry, One Bear Place #97348, Waco, TX 76798, USA.
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15
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Zhang W, Yu D, Wang Z, Zhang B, Xu L, Li G, Yan N, Rivard E, He G. Dibora[10]annulenes: Construction, Properties, and Their Ring-Opening Reactions. Org Lett 2018; 21:109-113. [DOI: 10.1021/acs.orglett.8b03538] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Weidong Zhang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Demei Yu
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Zhijun Wang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Bingjie Zhang
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Letian Xu
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Guoping Li
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
| | - Ni Yan
- Polymer Materials & Engineering Department, School of Materials Science & Engineering, Engineering Research Center of Transportation Materials, Ministry of Education, Chang’an University, Xi’an, Shaanxi 710064, China
| | - Eric Rivard
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G2G2, Canada
| | - Gang He
- School of Science jointly with Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710049, China
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16
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Greb L. Lewis Superacids: Classifications, Candidates, and Applications. Chemistry 2018; 24:17881-17896. [DOI: 10.1002/chem.201802698] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Lutz Greb
- Anorganisch-Chemisches InstitutUniversität Heidelberg Im Neuenheimer Feld 270 Germany
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17
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Cassidy SJ, Brettell-Adams I, McNamara LE, Smith MF, Bautista M, Cao H, Vasiliu M, Gerlach DL, Qu F, Hammer NI, Dixon DA, Rupar PA. Boranes with Ultra-High Stokes Shift Fluorescence. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00460] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- S. Joel Cassidy
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Ian Brettell-Adams
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Louis E. McNamara
- Department of Chemistry and Biochemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - Mallory F. Smith
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Michael Bautista
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Hongda Cao
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Deidra L. Gerlach
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Nathan I. Hammer
- Department of Chemistry and Biochemistry, University of Mississippi, Oxford, Mississippi 38677, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Paul A. Rupar
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
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18
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Bluer KR, Laperriere LE, Pujol A, Yruegas S, Adiraju VAK, Martin CD. Coordination and Ring Expansion of 1,2-Dipolar Molecules with 9-Phenyl-9-borafluorene. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00497] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Kristen R. Bluer
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Leif E. Laperriere
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Alba Pujol
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Sam Yruegas
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Venkata A. K. Adiraju
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
| | - Caleb D. Martin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place 97348, Waco, Texas 76798, United States
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19
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Yruegas S, Barnard JH, Al-Furaiji K, Dutton JL, Wilson DJD, Martin CD. Boraphosphaalkene Synthesis via Phosphaalkyne Insertion into 9-Borafluorene. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00248] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sam Yruegas
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco Texas 76798-7343, United States
| | - Jonathan H. Barnard
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco Texas 76798-7343, United States
| | - Khalidah Al-Furaiji
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia
| | - Jason L. Dutton
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia
| | - David J. D. Wilson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia
| | - Caleb D. Martin
- Department of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco Texas 76798-7343, United States
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20
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Follet E, Mayer P, Berionni G. Structures, Lewis Acidities, Electrophilicities, and Protecting Group Abilities of Phenylfluorenylium and Tritylium Ions. Chemistry 2017; 23:623-630. [PMID: 27723164 DOI: 10.1002/chem.201603963] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Indexed: 11/06/2022]
Abstract
The isolation, characterization, and the first X-ray structures of a fluorenylium ion and its Lewis adducts with nitrogen- and phosphorus-centered Lewis bases are reported. Kinetics of the reactions of a series of fluorenylium ions with reference π-, σ-, and n-nucleophiles of various sizes and nucleophilicities allowed the interplay between electronic and structural parameters on the electrophilicities of these planarized tertiary carbenium ions to be elucidated. Structure-reactivity correlations and extensive comparisons of their reactivities with those of di- and triarylcarbenium ions are described. Quantitative determination of the electrofugalities of fluorenylium ions revealed to which extent they are complementing tritylium ions as protecting groups and how their tuning is possible. Determination of the equilibrium constants of the Lewis adducts formation between pyridines of calibrated Lewis basicities and phenylfluorenylium and tritylium ions allowed the determination of their Lewis acidities and to showcase the potential of these carbon-centered Lewis acids in catalysis.
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Affiliation(s)
- Elsa Follet
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Peter Mayer
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
| | - Guillaume Berionni
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377, München, Germany
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21
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Smith MF, Cassidy SJ, Adams IA, Vasiliu M, Gerlach DL, Dixon DA, Rupar PA. Substituent Effects on the Properties of Borafluorenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00537] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Mallory F. Smith
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - S. Joel Cassidy
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - Ian A. Adams
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - Deidra L. Gerlach
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
| | - Paul A. Rupar
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, United States
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22
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Huang K, Couchman SA, Wilson DJD, Dutton JL, Martin CD. Reactions of Imines, Nitriles, and Isocyanides with Pentaphenylborole: Coordination, Ring Expansion, C–H Bond Activation, and Hydrogen Migration Reactions. Inorg Chem 2015; 54:8957-68. [DOI: 10.1021/acs.inorgchem.5b01040] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kexuan Huang
- Department
of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
| | - Shannon A. Couchman
- Department
of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia, 3086
| | - David J. D. Wilson
- Department
of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia, 3086
| | - Jason L. Dutton
- Department
of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia, 3086
| | - Caleb D. Martin
- Department
of Chemistry and Biochemistry, Baylor University, One Bear Place #97348, Waco, Texas 76798, United States
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23
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24
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Bontemps S, Devillard M, Mallet-Ladeira S, Bouhadir G, Miqueu K, Bourissou D. Phosphino-Boryl-Naphthalenes: Geometrically Enforced, Yet Lewis Acid Responsive P → B Interactions. Inorg Chem 2013; 52:4714-20. [DOI: 10.1021/ic4003466] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sébastien Bontemps
- Université de Toulouse, UPS, LHFA (Laboratoire Hétérochimie Fondamentale
et Appliquée), 118 route de Narbonne, and CNRS, LHFA, UMR 5069,
31062 Toulouse, France
| | - Marc Devillard
- Université de Toulouse, UPS, LHFA (Laboratoire Hétérochimie Fondamentale
et Appliquée), 118 route de Narbonne, and CNRS, LHFA, UMR 5069,
31062 Toulouse, France
| | - Sonia Mallet-Ladeira
- Institut de Chimie de Toulouse (FR 2599),
118 route de Narbonne, 31062 Toulouse cedex 9, France
| | - Ghenwa Bouhadir
- Université de Toulouse, UPS, LHFA (Laboratoire Hétérochimie Fondamentale
et Appliquée), 118 route de Narbonne, and CNRS, LHFA, UMR 5069,
31062 Toulouse, France
| | - Karinne Miqueu
- Institut des Sciences Analytiques et
de Physico-Chimie pour l’Environnement et les Matériaux
UMR-CNRS 5254, Université de Pau et des Pays de l’Adour, Hélioparc, 2 avenue du Président
Angot, 64053 Pau Cedex 09, France
| | - Didier Bourissou
- Université de Toulouse, UPS, LHFA (Laboratoire Hétérochimie Fondamentale
et Appliquée), 118 route de Narbonne, and CNRS, LHFA, UMR 5069,
31062 Toulouse, France
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25
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Thilagar P, Murillo D, Chen J, Jäkle F. Synthesis and supramolecular assembly of the bifunctional borinic acid [1,2-fcB(OH)]2. Dalton Trans 2013; 42:665-70. [DOI: 10.1039/c2dt31625k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Braunschweig H, Dyakonov V, Jimenez-Halla JOC, Kraft K, Krummenacher I, Radacki K, Sperlich A, Wahler J. An Isolable Radical Anion Based on the Borole Framework. Angew Chem Int Ed Engl 2012; 51:2977-80. [DOI: 10.1002/anie.201108632] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Indexed: 11/07/2022]
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27
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Braunschweig H, Dyakonov V, Jimenez-Halla JOC, Kraft K, Krummenacher I, Radacki K, Sperlich A, Wahler J. Ein isolierbares Borol-basiertes Radikalanion. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108632] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Biswas S, Maichle-Mössmer C, Bettinger HF. Rearrangement from the heteroantiaromatic borole to the heteroaromatic azaborine motif. Chem Commun (Camb) 2012; 48:4564-6. [DOI: 10.1039/c2cc30914a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Braunschweig H, Breher F, Chiu CW, Gamon D, Nied D, Radacki K. The Reduction Chemistry of Ferrocenylborole. Angew Chem Int Ed Engl 2010; 49:8975-8. [DOI: 10.1002/anie.201003611] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Braunschweig H, Breher F, Chiu CW, Gamon D, Nied D, Radacki K. Reduktion von Ferrocenylborol. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003611] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Braunschweig H, Chiu CW, Wahler J, Radacki K, Kupfer T. Chemical Reduction and Dimerization of 1-Chloro-2,3,4,5-tetraphenylborole. Chemistry 2010; 16:12229-33. [DOI: 10.1002/chem.201001556] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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32
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Fan C, Piers WE, Parvez M, McDonald R. Divergent Reactivity of Perfluoropentaphenylborole with Alkynes. Organometallics 2010. [DOI: 10.1021/om100334r] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheng Fan
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada, T2N 1N4
| | - Warren E. Piers
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada, T2N 1N4
| | - Masood Parvez
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada, T2N 1N4
| | - Robert McDonald
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
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33
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Schulz F, Sumerin V, Leskelä M, Repo T, Rieger B. Frustrated Lewis pairs: reactivities of TMS protected amines and phosphines in the presence of B(C6F5)3. Dalton Trans 2010; 39:1920-2. [DOI: 10.1039/b923196j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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LeSuer RJ, Geiger WE. Ligand-Solvent Interactions in a Highly Reduced Metal Chelate Complex: Medium Dependence of the One-Electron Reduction of the bis(Maleonitriledithiolato)Gold Dianion. Inorg Chem 2009; 48:10826-36. [PMID: 19894771 DOI: 10.1021/ic901547f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert J. LeSuer
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405
| | - William E. Geiger
- Department of Chemistry, University of Vermont, Burlington, Vermont 05405
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Welch GC, Prieto R, Dureen MA, Lough AJ, Labeodan OA, Höltrichter-Rössmann T, Stephan DW. Reactions of phosphines with electron deficient boranes. Dalton Trans 2009:1559-70. [DOI: 10.1039/b814486a] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Welch GC, Holtrichter-Roessmann T, Stephan DW. Thermal Rearrangement of Phosphine−B(C6F5)3 Adducts. Inorg Chem 2008; 47:1904-6. [DOI: 10.1021/ic702485r] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gregory C. Welch
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4
| | | | - Douglas W. Stephan
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4
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37
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Welch GC, Cabrera L, Chase PA, Hollink E, Masuda JD, Wei P, Stephan DW. Tuning Lewis acidity using the reactivity of “frustrated Lewis pairs”: facile formation of phosphine-boranes and cationic phosphonium-boranes. Dalton Trans 2007:3407-14. [PMID: 17664977 DOI: 10.1039/b704417h] [Citation(s) in RCA: 254] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The concept of "frustrated Lewis pairs" involves donor and acceptor sites in which steric congestion precludes Lewis acid-base adduct formation. In the case of sterically demanding phosphines and boranes, this lack of self-quenching prompts nucleophilic attack at a carbon para to B followed by fluoride transfer affording zwitterionic phosphonium borates [R(3)P(C(6)F(4))BF(C(6)F(5))(2)] and [R(2)PH(C(6)F(4))BF(C(6)F(5))(2)]. These can be easily transformed into the cationic phosphonium-boranes [R(3)P(C(6)F(4))B(C(6)F(5))(2)](+) and [R(2)PH(C(6)F(4))B(C(6)F(5))(2)](+) or into the neutral phosphino-boranes R(2)P(C(6)F(4))B(C(6)F(5))(2). This new reactivity provides a modular route to a family of boranes in which the steric features about the Lewis acidic center remains constant and yet the variation in substitution provides a facile avenue for the tuning of the Lewis acidity. Employing the Gutmann-Beckett and Childs methods for determining Lewis acid strength, it is demonstrated that the cationic boranes are much more Lewis acidic than B(C(6)F(5))(3), while the acidity of the phosphine-boranes is diminished.
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Affiliation(s)
- Gregory C Welch
- Department of Chemistry & Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B3P4
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