101
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Chakraborty S, Blacque O, Fox T, Berke H. Hydrogenation of Imines Catalyzed by Trisphosphine-Substituted Molybdenum and Tungsten Nitrosyl Hydrides and Co-Catalytic Acid. Chem Asian J 2014; 9:2896-907. [DOI: 10.1002/asia.201402280] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Indexed: 11/10/2022]
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102
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Dey RR, Dhar SS. Synthesis and Characterization of 2-Carboxyethyltriphenyl Phosphonium Tribromide and Its Application as Catalyst in Silylation of Alcohols and Thiols Under Solvent-Free Condition. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.897356] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Rupa Rani Dey
- a Department of Chemistry , National Institute of Technology , Silchar , Assam , India
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103
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Wang G, Chen C, Du T, Zhong W. Metal-Free Catalytic Hydrogenation of Imines with Recyclable [2.2]Paracyclophane-Derived Frustrated Lewis Pairs Catalysts. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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104
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Boone MP, Stephan DW. Ru-η6-Arene Cations [{(Ph2PC6H4)2B(η6-Ph)}RuX]+(X=Cl, H) as Lewis Acids. Chemistry 2014; 20:3333-41. [DOI: 10.1002/chem.201304289] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Indexed: 11/09/2022]
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105
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Hounjet LJ, Stephan DW. Hydrogenation by Frustrated Lewis Pairs: Main Group Alternatives to Transition Metal Catalysts? Org Process Res Dev 2014. [DOI: 10.1021/op400315m] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lindsay J. Hounjet
- Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
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106
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Paradies J. Metallfreie Hydrierung von ungesättigten Kohlenwasserstoffen mit molekularem Wasserstoff. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309253] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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107
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Paradies J. Metal-Free Hydrogenation of Unsaturated Hydrocarbons Employing Molecular Hydrogen. Angew Chem Int Ed Engl 2014; 53:3552-7. [DOI: 10.1002/anie.201309253] [Citation(s) in RCA: 218] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Indexed: 11/06/2022]
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108
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Wang X, Kehr G, Daniliuc CG, Erker G. Internal Adduct Formation of Active Intramolecular C4-bridged Frustrated Phosphane/Borane Lewis Pairs. J Am Chem Soc 2014; 136:3293-303. [DOI: 10.1021/ja413060u] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Xiaowu Wang
- Organisch-Chemisches Institut der Universität Münster, Correnstrasse 40, 48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut der Universität Münster, Correnstrasse 40, 48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut der Universität Münster, Correnstrasse 40, 48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Correnstrasse 40, 48149 Münster, Germany
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109
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Arnott GE, Moquist P, Daniliuc CG, Kehr G, Erker G. A Phosphino Calix[4]arene Bis-Frustrated Lewis Pair. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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110
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Erdmann M, Wiegand T, Blumenberg J, Eckert H, Ren J, Daniliuc CG, Kehr G, Erker G. Formation, structural characterization, and reactions of a unique cyclotrimeric vicinal Lewis pair containing (C6F5)2P-Lewis base and (C6F5)BH-Lewis acid components. Dalton Trans 2014; 43:15159-69. [DOI: 10.1039/c4dt02081b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A unique vicinal Lewis pair cyclotrimer has been synthesized and characterized with respect to its structure and reactivity.
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Affiliation(s)
- Markus Erdmann
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Thomas Wiegand
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | - Jonas Blumenberg
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Hellmut Eckert
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | - Jinjun Ren
- Institut für Physikalische Chemie and Graduate School of Chemistry
- WWU Münster
- D 48149 Münster, Germany
| | | | - Gerald Kehr
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut
- WWU Münster
- D 48149 Münster, Germany
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111
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Longobardi LE, Tang C, Stephan DW. Stoichiometric reductions of alkyl-substituted ketones and aldehydes to borinic esters. Dalton Trans 2014; 43:15723-6. [DOI: 10.1039/c4dt02648a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A series of alkyl-substituted ketones are shown to activate hydrogen in the presence of B(C6F5)3, affording the corresponding borinic esters RR′CHOB(C6F5)2.
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Affiliation(s)
- Lauren E. Longobardi
- Department of Chemistry
- 80 St George St
- University of Toronto
- Toronto, Canada M5S3H6
| | - Connie Tang
- Department of Chemistry
- 80 St George St
- University of Toronto
- Toronto, Canada M5S3H6
| | - Douglas W. Stephan
- Department of Chemistry
- 80 St George St
- University of Toronto
- Toronto, Canada M5S3H6
- Chemistry Department-Faculty of Science
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112
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Tamke S, Daniliuc CG, Paradies J. Frustrated Lewis pair catalyzed hydrosilylation and hydrosilane mediated hydrogenation of fulvenes. Org Biomol Chem 2014; 12:9139-44. [DOI: 10.1039/c4ob01346h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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113
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Sánchez-Sanz G, Trujillo C, Alkorta I, Elguero J. Intramolecular pnicogen interactions in phosphorus and arsenic analogues of proton sponges. Phys Chem Chem Phys 2014; 16:15900-9. [DOI: 10.1039/c4cp01072h] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A computational study of the intramolecular pnicogen bond in 1,8-bis-substituted naphthalene derivatives (ZXH and ZX2 with Z = P, As and X = H, F, Cl, and Br), structurally related to proton sponges, has been carried out.
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Affiliation(s)
- Goar Sánchez-Sanz
- School of Physics & Complex and Adaptive Systems Laboratory
- University College Dublin
- Dublin 4, Ireland
| | - Cristina Trujillo
- Institute of Organic Chemistry and Biochemistry
- Gilead Sciences Research Center & IOCB
- Academy of Sciences of the Czech Republic
- 166 10 Praha 6, Czech Republic
| | - Ibon Alkorta
- Instituto de Química Médica (CSIC)
- 28006-Madrid, Spain
| | - José Elguero
- Instituto de Química Médica (CSIC)
- 28006-Madrid, Spain
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114
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Xu X, Kehr G, Daniliuc CG, Erker G. Reactions of (Diphenylphosphinomethyl)zirconocene Chloride with B(C6F5)3: Competition between P/B and P/Zr+ Frustrated Lewis Pair Reactions. Organometallics 2013. [DOI: 10.1021/om400769y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xin Xu
- Organisch-Chemisches
Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches
Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches
Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches
Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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115
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Sajid M, Lawzer A, Dong W, Rosorius C, Sander W, Schirmer B, Grimme S, Daniliuc CG, Kehr G, Erker G. Carbonylation reactions of intramolecular vicinal frustrated phosphane/borane Lewis pairs. J Am Chem Soc 2013; 135:18567-74. [PMID: 24147963 DOI: 10.1021/ja408815k] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The intramolecular frustrated Lewis pair (FLP) Mes2PCH2CH2B(C6F5)2 4 adds cooperatively to carbon monoxide to form the five-membered heterocyclic carbonyl compound 5. The intramolecular FLP 7 contains an exo-3-B(C6F5)2 Lewis acid and an endo-2-PMes2 Lewis base functionality coordinated at the norbornane framework. This noninteracting FLP adds carbon monoxide in solution at -35 °C cooperatively to yield a five-membered heterocyclic FLP-carbonyl compound 8. In contrast, FLP 7 is carbonylated in a CO-doped argon matrix at 25 K to selectively form a borane carbonyl 9 without involvement of the adjacent phosphanyl moiety. The free FLP 7 was generated in the gas phase from its FLPH2 product 10. A DFT study has shown that the phosphonium hydrido borate zwitterion 10 is formed exergonically in solution but tends to lose H2 when brought into the gas phase.
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Affiliation(s)
- Muhammad Sajid
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität , Corrensstraße 40, 48149 Münster, Germany
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116
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Beckmann J, Hupf E, Lork E, Mebs S. Peri-substituted (ace)naphthylphosphinoboranes. (Frustrated) Lewis pairs. Inorg Chem 2013; 52:11881-8. [PMID: 24080026 DOI: 10.1021/ic401406k] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synthesis and molecular structures of 1-(diphenylphosphino)-8-naphthyldimesitylborane (1) and 5-(diphenylphosphino)-6-acenaphthyldimesitylborane (2) are reported. The experimentally determined P-B peri distances of 2.162(2) and 3.050(3) Å allow 1 and 2 to be classified as regular and frustrated Lewis pairs. The electronic characteristics of the (non)bonding P-B contacts are determined by analysis of a set of real-space bonding indicators (RSBIs) derived from the theoretically calculated electron and pair densities. These densities are analyzed utilizing the atoms-in-molecules (AIM), stockholder, and electron-localizability-indicator (ELI-D) space partitioning schemes. The recently introduced mapping of the electron localizability on the ELI-D basin surfaces is also applied. All RSBIs clearly discriminate the bonding P-B contact in 1 from the nonbonding P-B contact in 2, which is due to the fact that the acenaphthene framework is rather rigid, whereas the naphthyl framework shows sufficient conformational flexibility, allowing shorter peri interations. The results are compared to the previously known prototypical phosphinoborane Ph3PB(C6F5)3, which serves as a reference for a bonding P-B interaction. The most prominent features of the nonbonding P-B contact in 2 are the lack of an AIM bond critical point, the unaffected Hirshfeld surfaces of the P and B atomic fragments, and the negligible penetration of the electron population of the ELI-D lone pair basin of the P atom into the AIM B atomic basin.
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Affiliation(s)
- Jens Beckmann
- Institut für Anorganische Chemie, Universität Bremen , Leobener Straße, 28359 Bremen, Germany
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117
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Liu Y, Du H. Metal-Free Borane-Catalyzed Highly Stereoselective Hydrogenation of Pyridines. J Am Chem Soc 2013; 135:12968-71. [DOI: 10.1021/ja406761j] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yongbing Liu
- Beijing National Laboratory of Molecular Sciences,
CAS Key Laboratory of Molecular Recognition and Function, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Haifeng Du
- Beijing National Laboratory of Molecular Sciences,
CAS Key Laboratory of Molecular Recognition and Function, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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118
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Thomson JW, Hatnean JA, Hastie JJ, Pasternak A, Stephan DW, Chase PA. Improving the Industrial Feasibility of Metal-Free Hydrogenation Catalysts Using Chemical Scavengers. Org Process Res Dev 2013. [DOI: 10.1021/op4000847] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jordan W. Thomson
- GreenCentre Canada, 945 Princess Street, Kingston,
Ontario K7L 3N6, Canada
| | - Jillian A. Hatnean
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto,
Ontario M5S 3H6, Canada
| | - Jeff J. Hastie
- GreenCentre Canada, 945 Princess Street, Kingston,
Ontario K7L 3N6, Canada
| | - Andrew Pasternak
- GreenCentre Canada, 945 Princess Street, Kingston,
Ontario K7L 3N6, Canada
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto,
Ontario M5S 3H6, Canada
| | - Preston A. Chase
- GreenCentre Canada, 945 Princess Street, Kingston,
Ontario K7L 3N6, Canada
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119
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Nicasio JA, Steinberg S, Inés B, Alcarazo M. Tuning the Lewis Acidity of Boranes in Frustrated Lewis Pair Chemistry: Implications for the Hydrogenation of Electron-Poor Alkenes. Chemistry 2013; 19:11016-20. [DOI: 10.1002/chem.201301158] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/25/2013] [Indexed: 11/09/2022]
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120
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Lindqvist M, Axenov K, Nieger M, Räisänen M, Leskelä M, Repo T. Frustrated Lewis pair chemistry of chiral (+)-camphor-based aminoboranes. Chemistry 2013; 19:10412-8. [PMID: 23788132 DOI: 10.1002/chem.201300462] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 11/08/2022]
Abstract
Dimethylamino-(+)-camphorenamine reacted with an equimolar amount of Piers' borane, HB(C6F5)2, to give the corresponding iminium-hydroborate zwitterionic salt. Being in equilibrium with the parent enamine-HB(C6F5)2 N-B pair, this salt was able to split hydrogen heterolytically, hydrogenating the iminium group in the molecule. Detailed studies revealed that the hydrogen splitting in this reaction proceeded through an intermolecular pathway leading to a bornylamine-HB(C6F5)2 adduct. When the starting enamine is present in excess over HB(C6F5)2, the produced bornylamine-HB(C6F5)2 adduct breaks up, eliminating free bornylamine and forming the initial camphorenamine-HB(C6F5)2 pair. This results in hydrogenation of the camphorenamine framework in a catalytic fashion.
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Affiliation(s)
- Markus Lindqvist
- Department of Chemistry, Laboratory of Inorganic Chemistry, University of Helsinki, P.O. Box 55, 00014, Finland
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121
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Wang Y, Chen W, Lu Z, Li ZH, Wang H. Metal-Free HB(C6F5)2-Catalyzed Hydrogenation of Unfunctionalized Olefins and Mechanism Study of Borane-Mediated σ-Bond Metathesis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303500] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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122
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Wang Y, Chen W, Lu Z, Li ZH, Wang H. Metal-free HB(C6F5)2-catalyzed hydrogenation of unfunctionalized olefins and mechanism study of borane-mediated σ-bond metathesis. Angew Chem Int Ed Engl 2013; 52:7496-9. [PMID: 23780831 DOI: 10.1002/anie.201303500] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 12/31/2022]
Abstract
Out with the metal: Metal-free hydrogenation of unfunctionalized olefins can be achieved by employing HB(C6F5)2 as the catalyst. The key step in the catalytic reaction is believed to involve a novel borane-mediated σ-bond metathesis, which has been investigated both experimentally and theoretically.
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Affiliation(s)
- Yuwen Wang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai, 200433, China
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123
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Sajid M, Kehr G, Wiegand T, Eckert H, Schwickert C, Pöttgen R, Cardenas AJP, Warren TH, Fröhlich R, Daniliuc CG, Erker G. Noninteracting, Vicinal Frustrated P/B-Lewis Pair at the Norbornane Framework: Synthesis, Characterization, and Reactions. J Am Chem Soc 2013; 135:8882-95. [DOI: 10.1021/ja400338e] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Muhammad Sajid
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstr.
40, 48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstr.
40, 48149 Münster, Germany
| | - Thomas Wiegand
- Institut für Physikalische
Chemie and Graduate School of Chemistry, Westfälische Wilhelms-Universität, Corrensstr. 28/30, 48149
Münster, Germany
| | - Hellmut Eckert
- Institut für Physikalische
Chemie and Graduate School of Chemistry, Westfälische Wilhelms-Universität, Corrensstr. 28/30, 48149
Münster, Germany
| | - Christian Schwickert
- Institut
für Anorganische
und Analytische Chemie, Westfälische Wilhelms-Universität, Corrensstr. 28/30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut
für Anorganische
und Analytische Chemie, Westfälische Wilhelms-Universität, Corrensstr. 28/30, 48149 Münster, Germany
| | - Allan Jay P. Cardenas
- Department of Chemistry, Georgetown University, P.O. Box 571227, Washington,
D.C. 20057-1227, United States
| | - Timothy H. Warren
- Department of Chemistry, Georgetown University, P.O. Box 571227, Washington,
D.C. 20057-1227, United States
| | - Roland Fröhlich
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstr.
40, 48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstr.
40, 48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstr.
40, 48149 Münster, Germany
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124
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Li YF, Kang Y, Ko SB, Rao Y, Sauriol F, Wang S. Highly Congested Donor–Acceptor P–B Compound: Synthesis and Properties of a BMes2- and a PPh2-Functionalized 1,8-Naphthalene. Organometallics 2013. [DOI: 10.1021/om4002846] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu-Fei Li
- Department of Chemistry, Queen’s University, Kingston, Ontario, K7M 3N6,
Canada
| | - Youngjin Kang
- Division of Science
Education, Kangwon National University,
Chuncheon 200-701, Republic of Korea
| | - Soo-Byung Ko
- Department of Chemistry, Queen’s University, Kingston, Ontario, K7M 3N6,
Canada
| | - Yingli Rao
- Department of Chemistry, Queen’s University, Kingston, Ontario, K7M 3N6,
Canada
| | - Francoise Sauriol
- Department of Chemistry, Queen’s University, Kingston, Ontario, K7M 3N6,
Canada
| | - Suning Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario, K7M 3N6,
Canada
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125
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Liu Y, Du H. Chiral Dienes as “Ligands” for Borane-Catalyzed Metal-Free Asymmetric Hydrogenation of Imines. J Am Chem Soc 2013; 135:6810-3. [DOI: 10.1021/ja4025808] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yongbing Liu
- Beijing National Laboratory for
Molecular Sciences,
CAS Key Laboratory of Molecular Recognition and Function, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Haifeng Du
- Beijing National Laboratory for
Molecular Sciences,
CAS Key Laboratory of Molecular Recognition and Function, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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126
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Xu X, Kehr G, Daniliuc CG, Erker G. Reactions of a Cationic Geminal Zr+/P Pair with Small Molecules. J Am Chem Soc 2013; 135:6465-76. [DOI: 10.1021/ja3110076] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin Xu
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster,
Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster,
Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster,
Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster,
Germany
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127
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Mahdi T, del Castillo JN, Stephan DW. Metal-Free Hydrogenation of N-Based Heterocycles. Organometallics 2013. [DOI: 10.1021/om4000727] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Tayseer Mahdi
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
M5S 3H6
| | | | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
M5S 3H6
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128
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Clark ER, Del Grosso A, Ingleson MJ. The hydride-ion affinity of borenium cations and their propensity to activate H2 in frustrated Lewis pairs. Chemistry 2013; 19:2462-6. [PMID: 23296951 DOI: 10.1002/chem.201203318] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Indexed: 11/11/2022]
Abstract
A range of frustrated Lewis pairs (FLPs) containing borenium cations have been synthesised. The catechol (Cat)-ligated borenium cation [CatB(PtBu(3))](+) has a lower hydride-ion affinity (HIA) than B(C(6)F(5))(3). This resulted in H(2) activation being energetically unfavourable in a FLP with the strong base PtBu(3). However, ligand disproportionation of CatBH(PtBu(3)) at 100 °C enabled trapping of H(2) activation products. DFT calculations at the M06-2X/6-311G(d,p)/PCM (CH(2)Cl(2)) level revealed that replacing catechol with chlorides significantly increases the chloride-ion affinity (CIA) and HIA. Dichloro-borenium cations, [Cl(2)B(amine)](+), were calculated to have considerably greater HIA than B(C(6)F(5))(3). Control reactions confirmed that the HIA calculations can be used to successfully predict hydride-transfer reactivity between borenium cations and neutral boranes. The borenium cations [Y(Cl)B(2,6-lutidine)](+) (Y = Cl or Ph) form FLPs with P(mesityl)(3) that undergo slow deprotonation of an ortho-methyl of lutidine at 20 °C to form the four-membered boracycles [(CH(2){NC(5)H(3)Me})B(Cl)Y] and [HPMes(3)](+). When equimolar [Y(Cl)B(2,6-lutidine)](+)/P(mesityl)(3) was heated under H(2) (4 atm), heterolytic cleavage of dihydrogen was competitive with boracycle formation.
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Affiliation(s)
- Ewan R Clark
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
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129
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Zhao H, Leamer LA, Gabbaï FP. Anion capture and sensing with cationic boranes: on the synergy of Coulombic effects and onium ion-centred Lewis acidity. Dalton Trans 2013; 42:8164-78. [DOI: 10.1039/c3dt50491c] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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130
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131
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Ekkert O, Miera GG, Wiegand T, Eckert H, Schirmer B, Petersen JL, Daniliuc CG, Fröhlich R, Grimme S, Kehr G, Erker G. Remarkable coordination behavior of alkyl isocyanides toward unsaturated vicinal frustrated P/B Lewis pairs. Chem Sci 2013. [DOI: 10.1039/c3sc00082f] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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132
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Hounjet LJ, Caputo CB, Stephan DW. The Lewis acidity of fluorophosphonium salts: access to mixed valent phosphorus(iii)/(v) species. Dalton Trans 2013; 42:2629-35. [DOI: 10.1039/c2dt32711b] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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133
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Erdmann M, Rösener C, Holtrichter-Rößmann T, Daniliuc CG, Fröhlich R, Uhl W, Würthwein EU, Kehr G, Erker G. Functional group chemistry at intramolecular frustrated Lewis pairs: substituent exchange at the Lewis acid site with 9-BBN. Dalton Trans 2013; 42:709-18. [DOI: 10.1039/c2dt31737k] [Citation(s) in RCA: 28] [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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134
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Greb L, Tussing S, Schirmer B, Oña-Burgos P, Kaupmees K, Lõkov M, Leito I, Grimme S, Paradies J. Electronic effects of triarylphosphines in metal-free hydrogen activation: a kinetic and computational study. Chem Sci 2013. [DOI: 10.1039/c3sc50347j] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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135
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Hydrogen Activation by Frustrated Lewis Pairs: Insights from Computational Studies. Top Curr Chem (Cham) 2013; 332:157-211. [DOI: 10.1007/128_2012_399] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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136
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Ménard G, Tran L, Stephan DW. Activation of H2 using P/Al based frustrated Lewis pairs and reactions with olefins. Dalton Trans 2013; 42:13685-91. [DOI: 10.1039/c3dt51739j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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137
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Chen D, Klankermayer J. Frustrated Lewis Pairs: from dihydrogen activation to asymmetric catalysis. Top Curr Chem (Cham) 2013; 334:1-26. [PMID: 23408275 DOI: 10.1007/128_2012_402] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The non-self-quenched property of Frustrated Lewis Pairs (FLPs) contradicts the classical Lewis acid-base theory, but this peculiarity offers unprecedented possibilities for the activation of small molecules. Among all of their fascinating applications, FLP mediated hydrogen activation and the associated catalytic hydrogenations are currently considered as the most intriguing illustration of their reactivity. The FLPs enabled the catalytic reduction of a wide range of substrates with molecular hydrogen and tuning of the structural properties of the FLP partners allowed broadening of the substrate scope. Based on detailed mechanistic knowledge, FLP based asymmetric hydrogenation of various substrates could be achieved with high enantioselectivities. More importantly, FLP based enantioselective catalysis is not limited to the field of asymmetric hydrogenation, and other exciting catalytic applications have already appeared.
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Affiliation(s)
- Dianjun Chen
- Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
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138
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Inés B, Palomas D, Holle S, Steinberg S, Nicasio JA, Alcarazo M. Metal-Free Hydrogenation of Electron-Poor Allenes and Alkenes. Angew Chem Int Ed Engl 2012; 51:12367-9. [DOI: 10.1002/anie.201205348] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 08/31/2012] [Indexed: 11/10/2022]
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139
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Greb L, Paradies J. Paracyclophane derivatives in frustrated Lewis pair chemistry. Top Curr Chem (Cham) 2012; 334:81-100. [PMID: 23111727 DOI: 10.1007/128_2012_375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The metal-free activation of hydrogen was achieved using [2.2]paracyclophane-derived bisphosphines as Lewis base in frustrated Lewis pair chemistry. The rigid scaffold allows the orientation of functional groups so that steric aspects can be studied without altering the electronic nature. Depending on the geometry, structurally different phosphonium hydridoborates were generated when the frustrated Lewis pairs were exposed to hydrogen. The bisphosphines were applied in the 1,4-hydrosilylation-hydrogenation domino reaction providing access to secondary silyl-protected alcohols from enones in one step. Additionally, the planar-chiral scaffold was applied for the synthesis of novel enantiopure Lewis acids and Lewis bases.
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Affiliation(s)
- Lutz Greb
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
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140
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Farrell JM, Hatnean JA, Stephan DW. Activation of hydrogen and hydrogenation catalysis by a borenium cation. J Am Chem Soc 2012; 134:15728-31. [PMID: 22931196 DOI: 10.1021/ja307995f] [Citation(s) in RCA: 213] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The readily prepared borenium salt [(IiPr(2))(BC(8)H(14))][B(C(6)F(5))(4)] (2) [IiPr(2) = C(3)H(2)(NiPr)(2)] is shown to activate H(2) heterolytically in the presence of tBu(3)P. Compound 2 also acts as a catalyst for the metal-free hydrogenation of imines and enamines at room temperature.
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Affiliation(s)
- Jeffrey M Farrell
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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141
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Greb L, Oña-Burgos P, Schirmer B, Grimme S, Stephan DW, Paradies J. Metal-free Catalytic Olefin Hydrogenation: Low-Temperature H2 Activation by Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2012; 51:10164-8. [DOI: 10.1002/anie.201204007] [Citation(s) in RCA: 206] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 06/27/2012] [Indexed: 11/12/2022]
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142
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Abstract
The chemistry of some reactive frustrated Lewis pairs (FLPs) is reported. This includes intramolecular P/B and N/B FLPs, some of which were used as catalysts for the hydrogenation of electron-rich olefin substrates. Some advanced intermolecular FLPs are reported, which includes systems derived from very bulky alkenyl boranes obtained from 1,1-carboboration reactions of 1-alkynes with tris(pentafluorophenyl)borane. Some such systems activate dihydrogen and transfer the resulting proton/hydride pair even to some electron-poor alkynes. Eventually, we report on the reaction of our intramolecular ethylene-bridged P/B FLP with nitric oxide (NO). N,B-addition of the P-Lewis base/B-Lewis acid combination is observed to form a new type of a persistent aminoxyl radical. Some of the chemistry of the new FLP-NO radicals is presented and discussed.
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143
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Greb L, Oña-Burgos P, Schirmer B, Grimme S, Stephan DW, Paradies J. Metal-free Catalytic Olefin Hydrogenation: Low-Temperature H2 Activation by Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204007] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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144
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Reddy JS, Xu BH, Mahdi T, Fröhlich R, Kehr G, Stephan DW, Erker G. Alkenylborane-Derived Frustrated Lewis Pairs: Metal-Free Catalytic Hydrogenation Reactions of Electron-Deficient Alkenes. Organometallics 2012. [DOI: 10.1021/om3006068] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Sreedhar Reddy
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse
40, 48149 Münster, Germany
| | - Bao-Hua Xu
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse
40, 48149 Münster, Germany
| | - Tayseer Mahdi
- Department of Chemistry, University of Toronto, 80 St. George Street,Toronto, Ontario, M5S3H6, Canada
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse
40, 48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse
40, 48149 Münster, Germany
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street,Toronto, Ontario, M5S3H6, Canada
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse
40, 48149 Münster, Germany
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145
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Ménard G, Stephan DW. H2 Activation and Hydride Transfer to Olefins by Al(C6F5)3-Based Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2012; 51:8272-5. [DOI: 10.1002/anie.201203362] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Indexed: 11/09/2022]
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146
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Ménard G, Stephan DW. H2 Activation and Hydride Transfer to Olefins by Al(C6F5)3-Based Frustrated Lewis Pairs. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203362] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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147
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Frömel S, Fröhlich R, Daniliuc CG, Kehr G, Erker G. Halogen Addition to a Frustrated Lewis Pair. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200288] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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148
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Yao ZJ, Huo XK, Jin GX. Zwitterionic half-sandwich Rh and Ir complexes containing a diphosphine nido-carborane ligand: synthesis, structure transformation and application in H2 activation. Chem Commun (Camb) 2012; 48:6714-6. [PMID: 22627318 DOI: 10.1039/c2cc32036c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Several novel zwitterionic half-sandwich complexes and pseudocloso metallacarboranes based on 1,2-(PPh(2))(2)-1,2-C(2)B(10)H(10) were successfully prepared, and further study proved that some of them can activate H(2) to form the metal hydride complexes Cp*M(H)(7,8-(PPh(2))(2)-7,8-C(2)B(9)H(10)) (M = Rh, Ir).
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Affiliation(s)
- Zi-Jian Yao
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
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149
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Brazeau AL, Hänninen MM, Tuononen HM, Jones ND, Ragogna PJ. Synthesis, Reactivity, and Computational Analysis of Halophosphines Supported by Dianionic Guanidinate Ligands. J Am Chem Soc 2012; 134:5398-414. [PMID: 22352422 DOI: 10.1021/ja300587z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Allison L. Brazeau
- Department of Chemistry, The University of Western Ontario, Chemistry Building,
1151 Richmond Street, London, N6A 5B7 Ontario, Canada
| | - Mikko M. Hänninen
- Department of Chemistry, University of Jyväskylä, P.O. Box 35,
FI-40014 Finland
| | - Heikki M. Tuononen
- Department of Chemistry, University of Jyväskylä, P.O. Box 35,
FI-40014 Finland
| | - Nathan D. Jones
- Department of Chemistry, The University of Western Ontario, Chemistry Building,
1151 Richmond Street, London, N6A 5B7 Ontario, Canada
| | - Paul J. Ragogna
- Department of Chemistry, The University of Western Ontario, Chemistry Building,
1151 Richmond Street, London, N6A 5B7 Ontario, Canada
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150
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Voss T, Mahdi T, Otten E, Fröhlich R, Kehr G, Stephan DW, Erker G. Frustrated Lewis Pair Behavior of Intermolecular Amine/B(C6F5)3 Pairs. Organometallics 2012. [DOI: 10.1021/om300017u] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tanja Voss
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
- Department of Chemistry, University of Toronto, 80 St. George St. Toronto, Ontario M5S 3H6,
Canada
| | - Tayseer Mahdi
- Department of Chemistry, University of Toronto, 80 St. George St. Toronto, Ontario M5S 3H6,
Canada
| | - Edwin Otten
- Department of Chemistry, University of Toronto, 80 St. George St. Toronto, Ontario M5S 3H6,
Canada
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George St. Toronto, Ontario M5S 3H6,
Canada
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, 48149 Münster,
Germany
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