1
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Yanagisawa T, Mizuhata Y, Tokitoh N. Additive-Free Conversion of Internal Alkynes by Phosphanylalumanes: Production of Phosphorus/Aluminum Frustrated Lewis Pairs. Chempluschem 2020; 85:933-942. [PMID: 32401435 DOI: 10.1002/cplu.202000239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/24/2020] [Accepted: 04/29/2020] [Indexed: 11/10/2022]
Abstract
Internal and terminal alkynes react with phosphanylalumanes, i. e., P-Al single-bond species, through heating but without any additional additives. The reactions with internal alkynes afforded the corresponding adducts with cis-1,2-form in moderate yields (54-80 %). In addition, alkyne adducts thus obtained function as P/Al-based C2 -vicinal FLPs, and the FLP addition reactions with benzaldehyde and CO2 were demonstrated. Furthermore, in the reaction of 2,4,6-trimethylphenyl-substituted alkyne adducts with dimethyl acetylenedicarboxylate, an unexpected CAr -CMe bond cleavage characteristic of this system was demonstrated.
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Affiliation(s)
- Tatsuya Yanagisawa
- Institute for Chemical Research, Kyoto University Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Yoshiyuki Mizuhata
- Institute for Chemical Research, Kyoto University Gokasho, Uji, Kyoto, 611-0011, Japan.,Integrated Research Consortium on Chemical Sciences Uji, Kyoto, Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research, Kyoto University Gokasho, Uji, Kyoto, 611-0011, Japan.,Integrated Research Consortium on Chemical Sciences Uji, Kyoto, Japan
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2
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Kanbur U, Sadow AD. Rare-Earth Catalyzed C-H Bond Alumination of Terminal Alkynes. Chemistry 2020; 26:5479-5493. [PMID: 32034950 DOI: 10.1002/chem.202000325] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Indexed: 01/14/2023]
Abstract
Organoaluminum reagents' application in catalytic C-H bond functionalization is limited by competitive side reactions, such as carboalumination and hydroalumination. Herein, rare-earth tetramethylaluminate complexes are shown to catalyze the exclusive C-H bond metalation of terminal alkynes with the commodity reagents trimethyl-, triethyl-, and triisobutylaluminum. Kinetic experiments probing alkyl-group exchange between rare-earth aluminates and trialkylaluminum, C-H bond metalation of alkynes, and catalytic conversions reveal distinct pathways of catalytic aluminations with triethylaluminum versus trimethylaluminum. Most significantly, kinetic data point to reversible formation of a unique [Ln](AlR4 )2 ⋅AlR3 adduct, followed by turnover-limiting alkyne metalation. That is, C-H bond activation occurs from a more associated organometallic species, rather than the expected coordinatively unsaturated species. These mechanistic conclusions allude to a new general strategy for catalytic C-H bond alumination that make use of highly electrophilic metal catalysts.
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Affiliation(s)
- Uddhav Kanbur
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, 2415 Osborn Dr, Ames, IA, 50011, USA
| | - Aaron D Sadow
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, 2415 Osborn Dr, Ames, IA, 50011, USA
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3
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Nieto-Sepulveda E, Bage AD, Evans LA, Hunt TA, Leach AG, Thomas SP, Lloyd-Jones GC. Kinetics and Mechanism of the Arase-Hoshi R2BH-Catalyzed Alkyne Hydroboration: Alkenylboronate Generation via B–H/C–B Metathesis. J Am Chem Soc 2019; 141:18600-18611. [DOI: 10.1021/jacs.9b10114] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Eduardo Nieto-Sepulveda
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Andrew D. Bage
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Louise A. Evans
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Thomas A. Hunt
- Medicinal Chemistry, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, United Kingdom
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Stephen P. Thomas
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
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4
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Honacker C, Kappelt B, Jabłoński M, Hepp A, Layh M, Rogel F, Uhl W. Aluminium Functionalized Germanes: Intramolecular Activation of Ge–H Bonds, Formation of a Dihydrogen Bond and Facile Hydrogermylation of Unsaturated Substrates. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Honacker
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Benedikt Kappelt
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Mirosław Jabłoński
- Department of Quantum Chemistry Faculty of Chemistry Nicolaus Copernicus University in Toruń 7, Gagarina St. 87‐100 Toruń Poland
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Marcus Layh
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Friedhelm Rogel
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
| | - Werner Uhl
- Institut für Anorganische und Analytische Chemie Universität Münster Corrensstraße 30 48149 Münster Germany
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5
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Karasev MO, Karaseva IN, Pushkin DV. Coordination Polyhedra AlCn in Crystal Structures. RUSS J INORG CHEM+ 2019. [DOI: 10.1134/s003602361907009x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Klöcker H, Tendyck JC, Keweloh L, Hepp A, Uhl W. 3H-Phosphaallenes Revisited: Facile Synthesis by Hydroalumination of Alkynylphosphines and β-Elimination, Stability and Trapping of Transient Species by Coordination to Transition Metal Atoms. Chemistry 2019; 25:4793-4807. [PMID: 30681211 DOI: 10.1002/chem.201806334] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/23/2019] [Indexed: 11/10/2022]
Abstract
A facile method for the efficient synthesis of 3H-phosphaallenes, R-P=C=C(H)-R', is presented, which comprises treatment of dialkynylphosphines with dialkylaluminium hydrides (hydroalumination) and elimination of aluminium alkynides from intermediate alkenyl-alkynylphosphines. The stability of the phosphaallenes depends on steric shielding by the substituents at phosphorus (aryl or CH(SiMe3 )2 groups). Only supermesityl compounds are persistent at room temperature in solution. This simple method starting with easily accessible dialkynylphosphines and commercially available aluminium hydrides (HAlEt2 , HAliBu2 ) allows the generation of transient species, which were trapped by coordination to transition metals. The η1 -coordination via a P-W bond was observed for tungsten, while the side-on coordination via the P=C bond resulted with platinum. Decomposition of the mesityl derivative yielded an unprecedented product, which may be formed by 1,3-H shift to the P atom, hydrophosphination of the P=C bond of a second phosphaallene and formation of a P-P bond.
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Affiliation(s)
- Hans Klöcker
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Jonas C Tendyck
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Lukas Keweloh
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
| | - Werner Uhl
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany
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7
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Dahlkamp JM, Tolzmann M, Lucchesi R, Daniliuc CG, Wibbeling B, Uhl W, Würthwein EU. Chemoselective Hydroalumination of 1-Aza-but-1-en-3-ynes ( C-Iminoalkynes): Formation of Propargylamines by Imine Reduction and of 5-Aluminazoles and 1-Aza-butadienes by Anti-Michael Attack. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- J. Matthias Dahlkamp
- Organisch Chemisches Institut der Universität Münster and Center for Multiscale Theory and Computation (CMTC), Corrensstrasse 40, D-48149 Münster, Germany
| | - Michael Tolzmann
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Ralph Lucchesi
- Organisch Chemisches Institut der Universität Münster and Center for Multiscale Theory and Computation (CMTC), Corrensstrasse 40, D-48149 Münster, Germany
| | - Constantin-Gabriel Daniliuc
- Organisch Chemisches Institut der Universität Münster and Center for Multiscale Theory and Computation (CMTC), Corrensstrasse 40, D-48149 Münster, Germany
| | - Birgit Wibbeling
- Organisch Chemisches Institut der Universität Münster and Center for Multiscale Theory and Computation (CMTC), Corrensstrasse 40, D-48149 Münster, Germany
| | - Werner Uhl
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Organisch Chemisches Institut der Universität Münster and Center for Multiscale Theory and Computation (CMTC), Corrensstrasse 40, D-48149 Münster, Germany
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8
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Adate PA, Matsunaga T, Shin H, Harada T. Chiral Aluminum Catalyst System for the Enantioselective Addition of Vinylaluminum Reagents to Aldehydes: Metal Controlled Reversal of Enantioselectivity. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Priyanka A. Adate
- Faculty of Molecular Chemistry and Engineering; Kyoto Institute of Technology; Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan, Fax: (+81)-75-724-7580
| | - Takuya Matsunaga
- Faculty of Molecular Chemistry and Engineering; Kyoto Institute of Technology; Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan, Fax: (+81)-75-724-7580
| | - Hirata Shin
- Faculty of Molecular Chemistry and Engineering; Kyoto Institute of Technology; Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan, Fax: (+81)-75-724-7580
| | - Toshiro Harada
- Faculty of Molecular Chemistry and Engineering; Kyoto Institute of Technology; Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan, Fax: (+81)-75-724-7580
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9
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Bismuto A, Thomas SP, Cowley MJ. Aluminum Hydride Catalyzed Hydroboration of Alkynes. Angew Chem Int Ed Engl 2016; 55:15356-15359. [PMID: 27860199 DOI: 10.1002/anie.201609690] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Indexed: 11/11/2022]
Abstract
An aluminum-catalyzed hydroboration of alkynes using either the commercially available aluminum hydride DIBAL-H or bench-stable Et3 Al⋅DABCO as the catalyst and H-Bpin as both the boron reagent and stoichiometric hydride source has been developed. Mechanistic studies revealed a unique mode of reactivity in which the reaction is proposed to proceed through hydroalumination and σ-bond metathesis between the resultant alkenyl aluminum species and HBpin, which acts to drive turnover of the catalytic cycle.
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Affiliation(s)
- Alessandro Bismuto
- University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburg, EH9 3FJ, UK
| | - Stephen P Thomas
- University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburg, EH9 3FJ, UK
| | - Michael J Cowley
- University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburg, EH9 3FJ, UK
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10
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Bismuto A, Thomas SP, Cowley MJ. Aluminum Hydride Catalyzed Hydroboration of Alkynes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609690] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alessandro Bismuto
- University of Edinburgh; Joseph Black Building, David Brewster Road Edinburg EH9 3FJ UK
| | - Stephen P. Thomas
- University of Edinburgh; Joseph Black Building, David Brewster Road Edinburg EH9 3FJ UK
| | - Michael J. Cowley
- University of Edinburgh; Joseph Black Building, David Brewster Road Edinburg EH9 3FJ UK
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11
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Weisheim E, Bücker L, Neumann B, Stammler HG, Mitzel NW. Tridentate Lewis acids with phenyl substituted 1,3,5-trisilacyclohexane backbones. Dalton Trans 2016; 45:198-207. [DOI: 10.1039/c5dt04208a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new 1,3,5-trisilacyclohexane scaffold with axially orientated ethynyl groups provides opportunities to create new tridentate Lewis acids. Some examples of these Lewis acids have been synthesized.
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Affiliation(s)
- Eugen Weisheim
- Bielefeld University
- Faculty of Chemistry
- Chair of Inorganic and Structural Chemistry
- Centre for Molecular Materials CM2
- 33615 Bielefeld
| | - Lisa Bücker
- Bielefeld University
- Faculty of Chemistry
- Chair of Inorganic and Structural Chemistry
- Centre for Molecular Materials CM2
- 33615 Bielefeld
| | - Beate Neumann
- Bielefeld University
- Faculty of Chemistry
- Chair of Inorganic and Structural Chemistry
- Centre for Molecular Materials CM2
- 33615 Bielefeld
| | - Hans-Georg Stammler
- Bielefeld University
- Faculty of Chemistry
- Chair of Inorganic and Structural Chemistry
- Centre for Molecular Materials CM2
- 33615 Bielefeld
| | - Norbert W. Mitzel
- Bielefeld University
- Faculty of Chemistry
- Chair of Inorganic and Structural Chemistry
- Centre for Molecular Materials CM2
- 33615 Bielefeld
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12
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Zhao Y, Liu Y, Wu B, Yang XJ. Reactions of α-diimine-aluminum complexes with sodium alkynides: versatile structures of aluminum σ-alkynide complexes. Dalton Trans 2015; 44:13671-80. [PMID: 26147659 DOI: 10.1039/c5dt01693b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Reaction of AlCl(3) with the monoanionic α-diimine ligand [NaL] yielded the complex [L˙(-)Al(III)Cl(2)(-)] (1, L = [(2,6-iPr(2)C(6)H(3))NC(Me)](2)), and subsequent reduction of by sodium metal afforded the mononuclear [L(2-)Al(III)Cl(-)(THF)] (2) and binuclear [L(2-)(THF)Al(II)-Al(II)(THF)L(2-)] (3). Compounds 2 and 3 exhibit interesting reactivities to sodium alkynides at room temperature. Treatment of dialumane 3 with 1 equiv. of 4-methylphenylacetylene in the presence of sodium metal yielded the asymmetric Al-Al-bonded compound [Na(Et(2)O)][LAl-Al(C[triple bond, length as m-dash]C(C(6)H(4)-Me))L] (4) containing an alkynyl group attached to one of the Al atoms. The reaction of 2 with 4-methylphenylacetylene and Na (or sodium 4-methylphenylacetylide) resulted in the mononuclear product [L(THF)Al(C[triple bond, length as m-dash]C-(C(6)H(4)-Me))] (5) containing a single terminal acetylide ligand. Precursor 2 reacted with 2 equiv. of phenylacetylene (or 4-methylphenylacetylene, trimethylsilylacetylene) and Na to give the tweezer "ate" complexes, [Na(THF)(DME)][LAl(C[triple bond, length as m-dash]CR)(2)] (R = C(6)H(5), ; C(6)H(4)-Me, ; Si(Me)(3), 6c), [Na(THF)](2)[LAl(C[triple bond, length as m-dash]CPh)(2)](2)(μ-C(7)H(8)) (7), [Na(C(7)H(8))][(μ-Na)][LAl(C[triple bond, length as m-dash]CSi(Me)(3))(2)](2) (8), as well as the polymeric [LAl(C[triple bond, length as m-dash]CPh)(2)Na](n) (9). In the products, two alkynyl groups coordinate terminally to one Al center and a sodium ion is embedded between these two alkynyls. Interestingly, both cycloaddition and terminal acetylide coordination of three equiv. of alkyne occurred in the reaction of with 1-hexyne, resulting in the unique dialuminum complex [Na(Et(2)O)](2)[{L(C(C(4)H(9))[double bond, length as m-dash]CH)}Al(C[triple bond, length as m-dash]C(C(4)H(9)))(2)](2) (10). Complexes 1-10 have been characterized by NMR ((1)H, (13)C) and IR spectroscopy, elemental analysis, and X-ray diffraction, and their electronic structures were studied by DFT calculations.
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Affiliation(s)
- Yanxia Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China.
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13
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Wasano T, Agou T, Sasamori T, Tokitoh N. Synthesis, structure and reactivity of a 1-bromoalumole. Chem Commun (Camb) 2014; 50:8148-50. [DOI: 10.1039/c4cc03470h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Andrews P, Latham CM, Magre M, Willcox D, Woodward S. ZrCl2(η-C5Me5)2-AlHCl2·(THF)2: efficient hydroalumination of terminal alkynes and cross-coupling of the derived alanes. Chem Commun (Camb) 2013; 49:1488-90. [DOI: 10.1039/c2cc37537k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Uhl W, Rösener C, Layh M, Hepp A. Treatment of a Methylene-Bridged Dialuminium Compound with Lithium Alkanides and Alkynides - Single vs. Twofold Terminal Coordination. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Ménard G, Stephan DW. CH Activation of Isobutylene Using Frustrated Lewis Pairs: Aluminum and Boron σ-Allyl Complexes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200328] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Ménard G, Stephan DW. CH Activation of Isobutylene Using Frustrated Lewis Pairs: Aluminum and Boron σ-Allyl Complexes. Angew Chem Int Ed Engl 2012; 51:4409-12. [DOI: 10.1002/anie.201200328] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Indexed: 11/06/2022]
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18
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Winkelhaus D, Neumann B, Stammler HG, Mitzel NW. Intramolecular Lewis acid–base pairs based on 4-ethynyl-2,6-lutidine. Dalton Trans 2012; 41:9143-50. [DOI: 10.1039/c2dt30719g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Roters S, Hepp A, Slootweg JC, Lammertsma K, Uhl W. Alkynide and acetonitrile activation by strained AlPC2 heterocycles. Chem Commun (Camb) 2012; 48:9616-8. [DOI: 10.1039/c2cc33300g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Uhl W, Heller D, Kösters J, Würthwein EU, Ghavtadze N. Hydroalumination of Bis(alkynyl)silanes: Generation of Chelating Lewis Acids, Their Application in the Coordination of Chloride Ions and a 1,1-Carbalumination Reaction. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100890] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Hydroalumination of silylacetylenes: a novel and highly stereoselective synthesis of (E)-telluro(silyl)ketene acetals and their applications in Sonogashira cross-coupling reactions. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.147] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Appelt C, Westenberg H, Bertini F, Ehlers AW, Slootweg JC, Lammertsma K, Uhl W. Geminal Phosphorus/Aluminum-Based Frustrated Lewis Pairs: CH versus CC Activation and CO2Fixation. Angew Chem Int Ed Engl 2011; 50:3925-8. [DOI: 10.1002/anie.201006901] [Citation(s) in RCA: 262] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 12/19/2010] [Indexed: 11/11/2022]
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23
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Appelt C, Westenberg H, Bertini F, Ehlers AW, Slootweg JC, Lammertsma K, Uhl W. Geminal Phosphorus/Aluminum-Based Frustrated Lewis Pairs: CH versus CC Activation and CO2Fixation. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006901] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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24
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Gao F, Hoveyda AH. Alpha-selective Ni-catalyzed hydroalumination of aryl- and alkyl-substituted terminal alkynes: practical syntheses of internal vinyl aluminums, halides, or boronates. J Am Chem Soc 2010; 132:10961-3. [PMID: 20698643 DOI: 10.1021/ja104896b] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for Ni-catalyzed hydroalumination of terminal alkynes, leading to the formation of alpha-vinylaluminum isomers efficiently (>98% conv in 2-12 h) and with high selectivity (95% to >98% alpha), is described. Catalytic alpha-selective hydroalumination reactions proceed in the presence of a reagent (diisobutylaluminum hydride; dibal-H) and 3.0 mol % metal complex (Ni(dppp)Cl(2)) that are commercially available and inexpensive. Under the same conditions, but with Ni(PPh(3))(2)Cl(2), hydroalumination becomes highly beta-selective, and, unlike uncatalyzed transformations with dibal-H, generates little or no alkynylaluminum byproducts. All hydrometalation reactions are reliable, operationally simple, and practical and afford an assortment of vinylaluminums that are otherwise not easily accessible. The derived alpha-vinyl halides and boronates can be synthesized through direct treatment with the appropriate electrophiles [e.g., Br(2) and methoxy(pinacolato)boron, respectively]. Ni-catalyzed hydroaluminations can be performed with as little as 0.1 mol % catalyst and on gram scale with equally high efficiency and selectivity.
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Affiliation(s)
- Fang Gao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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25
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Chmiel J, Neumann B, Stammler H, Mitzel NW. Dialkylaluminium‐, ‐Gallium‐, and ‐Indium‐Based Poly‐Lewis Acids with a 1,8‐Diethynylanthracene Backbone. Chemistry 2010; 16:11906-14. [DOI: 10.1002/chem.201001618] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jasmin Chmiel
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld (Germany), Fax: (+49) 521‐1066‐026
| | - Beate Neumann
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld (Germany), Fax: (+49) 521‐1066‐026
| | - Hans‐Georg Stammler
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld (Germany), Fax: (+49) 521‐1066‐026
| | - Norbert W. Mitzel
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld (Germany), Fax: (+49) 521‐1066‐026
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26
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Maheswari K, Rajendran NM, Meyer J, Reddy ND. Reactions of an Aluminum Amide with Aromatic Nitriles: Formation of Al−N−C Frameworks. Organometallics 2010. [DOI: 10.1021/om100406y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Maheswari
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
| | - N. M. Rajendran
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
| | - Jens Meyer
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), 76313 Karlsruhe, Germany
| | - N. Dastagiri Reddy
- Department of Chemistry, Pondicherry University, Pondicherry 605014, India
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27
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Uhl W, Rohling M, Würthwein EU, Ghavtadze N, Bergander K. Facile Synthesis of an Unsaturated Spiro Germane by Hydroalumination and Intramolecular 1,1-Carbalumination. Organometallics 2010. [DOI: 10.1021/om100359k] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Werner Uhl
- Institut für Anorganische
und Analytische Chemie der Universität Münster, Corrensstrasse
30, D-48149 Münster, Germany
| | - Martina Rohling
- Institut für Anorganische
und Analytische Chemie der Universität Münster, Corrensstrasse
30, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Organisch-chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Nugzar Ghavtadze
- Organisch-chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Klaus Bergander
- Organisch-chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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28
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Uhl W, Heller D. Hydroaluminierung von Silicium-zentrierten Dialkinen - Synthese gemischt-substituierter Alkenyl-alkinylsilane. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.200900323] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Uhl W, Hepp A, Westenberg H, Zemke S, Würthwein EU, Hellmann J. Hydroalumination and Hydrogallation of 1,2-Bis(trimethylsilylethynyl)benzene: Formation of Molecular Capsules and C−C Bond Activation. Organometallics 2010. [DOI: 10.1021/om901058a] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Werner Uhl
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Hauke Westenberg
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Sarina Zemke
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Ernst-Ulrich Würthwein
- Organisch-chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Johannes Hellmann
- Organisch-chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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30
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Westenberg H, Slootweg JC, Hepp A, Kösters J, Roters S, Ehlers AW, Lammertsma K, Uhl W. C≡C Triple Bond Activation by Heterocyclic Aluminum Phosphinides. Organometallics 2010. [DOI: 10.1021/om901051p] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hauke Westenberg
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - J. Chris Slootweg
- Department of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Jutta Kösters
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Steffi Roters
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Andreas W. Ehlers
- Department of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Koop Lammertsma
- Department of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Werner Uhl
- Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
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31
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Uhl W, Claesener M, Hepp A, Jasper B, Vinogradov A, van Wüllen L, Köster TKJ. The influence of halogen substituents on the course of hydrogallation and hydroalumination reactions. Dalton Trans 2009:10550-62. [DOI: 10.1039/b913568e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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