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Zheng X, Del Rosal I, Xu X, Yao Y, Maron L, Xu X. Calcium-mediated C(sp 3)-H Activation and Alkylation of Alkylpyridines. Inorg Chem 2021; 60:5114-5121. [PMID: 33728911 DOI: 10.1021/acs.inorgchem.1c00161] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Main-group metal calcium-mediated alkylpyridine benzylic C(sp3)-H activation and functionalization have been achieved. The reaction of a calcium hydride complex [{(DIPPnacnac)CaH(thf)}2] (DIPPnacnac = CH{(CMe)(2,6-iPr2-C6H3N)}2) with two equivalents of 2,6-lutidine rapidly yields a monomeric calcium alkyl complex with the release of dihydrogen. A hydride/carbon-bridged binuclear calcium complex [{(DIPPnacnac)Ca}2(μ-H){2-Me-6-(μ-CH2)-Py}(thf)] is obtained from an equimolar treatment of calcium hydride and 2,6-lutidine that is readily converted into mono- or binuclear calcium alkyl complexes upon subsequent addition of 2,6-lutidine. DFT calculations and kinetic studies are conducted to determine their reaction profiles. More significantly, this calcium hydride complex catalyzes regioselective benzylic C-H bond addition of alkylpyridines to a variety of alkenes, affording linear or branched alkylated pyridine derivatives.
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Affiliation(s)
- Xizhou Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Iker Del Rosal
- LPCNO, CNRS, and INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Xian Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Laurent Maron
- LPCNO, CNRS, and INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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Morris LJ, Hill MS, Mahon MF, Manners I, Patrick BO. Alkaline-Earth Derivatives of Diphenylphosphine–Borane. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Louis J. Morris
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Ian Manners
- Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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3
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Morris LJ, Rajabi NA, Hill MS, Manners I, McMullin CL, Mahon MF. Phosphinoborane interception at magnesium by borane-assisted phosphine-borane dehydrogenation. Dalton Trans 2020; 49:14584-14591. [DOI: 10.1039/d0dt03415k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ph2PBH2 is generated and trapped on-metal by addition of B(C6F5)3 to a β-diketiminato magnesium phospidoborane complex, similar reactivity is meanwhile prevented for the analogous calcium-based system by formation of a stable η6-toluene complex.
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Affiliation(s)
| | | | | | - Ian Manners
- Department of Chemistry
- University of Victoria
- Victoria
- Canada
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4
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Gentner TX, Rösch B, Thum K, Langer J, Ballmann G, Pahl J, Donaubauer WA, Hampel F, Harder S. Heteroleptic Heavier Alkaline Earth Metal Amide Complexes Stabilized by a Superbulky β-Diketiminate Ligand. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00211] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Xaver Gentner
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Bastian Rösch
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Katharina Thum
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Jens Langer
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Gerd Ballmann
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Jürgen Pahl
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Wolfgang A. Donaubauer
- Chair of Organic Chemistry II, Department of Chemistry & Pharmacy, Friedrich-Alexander-Universität Erlangen Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Frank Hampel
- Chair of Organic Chemistry II, Department of Chemistry & Pharmacy, Friedrich-Alexander-Universität Erlangen Nürnberg, Nikolaus-Fiebiger-Straße 10, 91058 Erlangen, Germany
| | - Sjoerd Harder
- Chair of Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
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5
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Zheng X, Huang J, Yao Y, Xu X. Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide. Chem Commun (Camb) 2019; 55:9152-9155. [DOI: 10.1039/c9cc04698d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A calcium aryloxide complex reacts with amine–boranes to give unprecedented amine–borane coordinated complexes through Ca⋯H interactions, which serve as active species for catalytic dehydrogenation reactions.
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Affiliation(s)
- Xizhou Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Jiasu Huang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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6
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Forosenko NV, Basalov IV, Cherkasov AV, Fukin GK, Shubina ES, Trifonov AA. Amido Ca(ii) complexes supported by Schiff base ligands for catalytic cross-dehydrogenative coupling of amines with silanes. Dalton Trans 2018; 47:12570-12581. [DOI: 10.1039/c8dt01130c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroleptic Ca(ii) amides coordinated by multidentate phenolato ligands proved to be efficient catalysts for catalytic cross-dehydrogenative coupling of amines with silanes.
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Affiliation(s)
- Natalia V. Forosenko
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- GSP-445, Russia
| | - Ivan V. Basalov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- GSP-445, Russia
| | - Anton V. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- GSP-445, Russia
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- GSP-445, Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- GSP-1, Russia
| | - Alexander A. Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- GSP-445, Russia
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
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7
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Izod K, Watson JM, El-Hamruni SM, Harrington RW, Waddell PG. Alkali-Metal- and Alkaline-Earth-Metal-Mediated C–O Activation of an Anisole-Substituted Phosphido–Borane Ligand. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00262] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keith Izod
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K
| | - James M. Watson
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K
| | - Salima M. El-Hamruni
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K
| | - Ross W. Harrington
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K
| | - Paul G. Waddell
- Main Group Chemistry Laboratories,
School of Chemistry, Bedson Building, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K
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8
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Langer J, Kosygin I, Puchta R, Pahl J, Harder S. A Soft Grip: Magnesium Complexes with a Phosphine-Modified Phosphonium Diylidic Lewis Base. Chemistry 2016; 22:17425-17435. [DOI: 10.1002/chem.201603775] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Jens Langer
- Inorganic and Organometallic Chemistry; Friedrich-Alexander University Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Germany
- Inorganic and Analytical Chemistry; Friedrich-Schiller University Jena; Humboldtstraße 8 07743 Jena Germany
| | - Irina Kosygin
- Inorganic and Organometallic Chemistry; Friedrich-Alexander University Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Germany
| | - Ralph Puchta
- Inorganic and Organometallic Chemistry; Friedrich-Alexander University Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Germany
| | - Jürgen Pahl
- Inorganic and Organometallic Chemistry; Friedrich-Alexander University Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry; Friedrich-Alexander University Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Germany
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9
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Rossin A, Peruzzini M. Ammonia–Borane and Amine–Borane Dehydrogenation Mediated by Complex Metal Hydrides. Chem Rev 2016; 116:8848-72. [DOI: 10.1021/acs.chemrev.6b00043] [Citation(s) in RCA: 305] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrea Rossin
- Institute of Chemistry of
Organometallic Compounds, ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy
| | - Maurizio Peruzzini
- Institute of Chemistry of
Organometallic Compounds, ICCOM-CNR, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy
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10
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Bellham P, Anker MD, Hill MS, Kociok-Köhn G, Mahon MF. The significance of secondary interactions during alkaline earth-promoted dehydrogenation of dialkylamine-boranes. Dalton Trans 2016; 45:13969-78. [DOI: 10.1039/c6dt03185d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of anilidoimine magnesium n-butyl and calcium bis(trimethylsilyl)amide derivatives with Me2NH·BH3 at 25 °C resulted in the isolation of complexes containing [NMe2BH2NMe2BH3]− and [NMe2BH3]− anions respectively.
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11
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Stennett TE, Harder S. s-Block amidoboranes: syntheses, structures, reactivity and applications. Chem Soc Rev 2016; 45:1112-28. [DOI: 10.1039/c5cs00544b] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The highly versatile amidoborane compounds of the group 1 and 2 metals are reviewed, with an emphasis on their synthesis, structures and reactivity.
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Affiliation(s)
- Tom E. Stennett
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- Inorganic and Organometallic Chemistry
- 91058 Erlangen
- Germany
| | - Sjoerd Harder
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- Inorganic and Organometallic Chemistry
- 91058 Erlangen
- Germany
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12
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Liptrot DJ, Hill MS, Mahon MF, Wilson ASS. Alkaline-Earth-Catalyzed Dehydrocoupling of Amines and Boranes. Angew Chem Int Ed Engl 2015; 54:13362-5. [PMID: 26360523 PMCID: PMC4674969 DOI: 10.1002/anie.201505949] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/13/2015] [Indexed: 11/28/2022]
Abstract
Dehydrocoupling reactions between the boranes HBpin and 9-borabicyclo[3.3.1]nonane and a range of amines and anilines ensue under very mild reaction conditions in the presence of a simple β-diketiminato magnesium n-butyl precatalyst. The facility of the reactions is suggested to be a function of the Lewis acidity of the borane substrate, and is dictated by resultant pre-equilibria between, and the relative stability of, magnesium hydride and borohydride intermediates during the course of the catalysis.
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Affiliation(s)
- David J Liptrot
- Department of Chemistry, University of Bath, Bath BA2 7AY (UK)
| | - Michael S Hill
- Department of Chemistry, University of Bath, Bath BA2 7AY (UK).
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath BA2 7AY (UK)
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13
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Liptrot DJ, Hill MS, Mahon MF, Wilson ASS. Alkaline‐Earth‐Catalyzed Dehydrocoupling of Amines and Boranes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505949] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Bath BA2 7AY (UK)
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Bath BA2 7AY (UK)
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14
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Roberts AJ, Clegg W, Kennedy AR, Probert MR, Robertson SD, Hevia E. Two alternative approaches to access mixed hydride-amido zinc complexes: synthetic, structural and solution implications. Dalton Trans 2015; 44:8169-77. [DOI: 10.1039/c5dt00312a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the presence of a bulky N-heterocyclic carbene, Zn(HMDS)2can be converted in to either a mononuclear amido/hydride complex or a tetranuclear hydride rich cluster depending on the hydride source and reaction conditions employed.
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Affiliation(s)
- Andrew J. Roberts
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - William Clegg
- School of Chemistry
- Newcastle University
- Newcastle upon Tyne
- UK
| | - Alan R. Kennedy
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | | | - Stuart D. Robertson
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Eva Hevia
- WestCHEM
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
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15
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Bellham P, Hill MS, Kociok-Köhn G. Stoichiometric and Catalytic Reactivity of tert-Butylamine–Borane with Calcium Silylamides. Organometallics 2014. [DOI: 10.1021/om500467b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter Bellham
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, U.K
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, U.K
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16
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Wang K, Zhang JG, Man TT, Wu M, Chen CC. Recent Process and Development of Metal Aminoborane. Chem Asian J 2013; 8:1076-89. [DOI: 10.1002/asia.201201241] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 02/24/2013] [Indexed: 11/09/2022]
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18
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