51
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Affiliation(s)
- Debabrata Mukherjee
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
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52
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Freitag B, Fischer CA, Penafiel J, Ballmann G, Elsen H, Färber C, Piesik DF, Harder S. Bora-amidinate as a cooperative ligand in group 2 metal catalysis. Dalton Trans 2017; 46:11192-11200. [PMID: 28745370 DOI: 10.1039/c7dt02136d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Syntheses and crystal structures of the monomeric bora-amidinate (bam) complexes DIPPNBN-Mg·(THF)3 and DIPPNBN-Ca·(THF)4 are presented; DIPPNBN = HB[N(2,6-iPr2-C6H3)]2. The simplicity of their 1H NMR spectra in THF-d8 suggest that their monomeric solid state structures are retained in solution. DIPPNBN-Mg·(THF)3 in C6D6, however, is in equilibrium with a dimeric species. Calculations (B3PW91/6-311++G**) reveal a very high localized negative charge (NPA: -1.103) on the N atoms in DIPPNBN-Mg. The strongly basic properties of the bam ligand are in agreement with catalytic activity of these complexes in the intramolecular alkene hydroamination. A mechanism is proposed in which the bam ligand is non-innocent and cooperative, playing an active role in substrate deprotonation and product protonation.
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Affiliation(s)
- Benjamin Freitag
- Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
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53
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Li N, Guan BT. Yttrium-Benzyl Complexes Bearing Chiral Iminophosphonamide Ligands: Synthesis and Application in Catalytic Asymmetric Amine-Silane Dehydrocoupling Reactions. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700327] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nan Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry
| | - Bing-Tao Guan
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 People's Republic of China
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54
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Mukherjee D, Shirase S, Beckerle K, Spaniol TP, Mashima K, Okuda J. Group 2 metal (Mg, Ca, Sr) silylamides supported by a cyclen-derived macrocyclic polyamine. Dalton Trans 2017. [PMID: 28627554 DOI: 10.1039/c7dt01727h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroleptic bis(silyl)amides of magnesium and calcium [(L)M{N(SiMe3)2}] [M = Mg, Ca; LH = 1,4,7-trimethyl-1,4,7,10-tetraazacyclododecane; (Me3TACD)H] were previously synthesized from LH and [M{N(SiMe3)2}2]. Strontium bis(silyl)amides [Sr{N(SiMe3)2}2(thf)2] and [Sr{N(SiHMe2)2}2(thf)2/3] reacted with LH to give different types of products, depending on the presence of the β-SiH function. While the former underwent protonolysis to give the amido-bridged dimer [(L)Sr{N(SiMe3)2}]2 (1), the latter gave the adduct [(LH)Sr{N(SiHMe2)2}2] (2) as a stable solid. 2 slowly underwent an intramolecular Si-H/H-N dehydrocoupling in solution to give [{(L)SiMe2N(SiHMe2)}Sr{N(SiHMe2)2}] (3) by liberating H2. The results of transamination of 1 with HN(SiHMe2)2 depended on the relative stoichiometric ratio. A 1 : 1 mixture in n-pentane gave [{(L)SiMe2N(SiHMe2)}Sr{N(SiMe3)2}] (4) and H2, while excess HN(SiHMe2)2 gave the adduct 2 under similar conditions. Compounds 2 and 3 exhibit Sr↼H-Si interactions according to X-ray crystallography, NMR, and IR spectroscopy. Lighter congeners of elusive [(L)Sr{N(SiHMe2)2}] were isolable for Mg (5) and Ca (6).
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Affiliation(s)
- Debabrata Mukherjee
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany.
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55
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Affiliation(s)
- Krzysztof Kuciński
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89b 61-614 Poznań Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Umultowska 89b 61-614 Poznań Poland
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56
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Baishya A, Peddarao T, Nembenna S. Organomagnesium amide catalyzed cross-dehydrocoupling of organosilanes with amines. Dalton Trans 2017; 46:5880-5887. [DOI: 10.1039/c7dt00806f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroleptic organomagnesium complex pre-catalyzed cross-dehydrocoupling of silanes with amines.
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Affiliation(s)
- Ashim Baishya
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India 752050
| | - Thota Peddarao
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India 752050
| | - Sharanappa Nembenna
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India 752050
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57
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Shi Y, Li J, Cui C. Synthesis of divalent ytterbium terphenylamide and catalytic application for regioselective hydrosilylation of alkenes. Dalton Trans 2017; 46:10957-10962. [DOI: 10.1039/c7dt01837a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Divalent ytterbium terphenylamide exhibited high regioselectivity and activity in the hydrosilylation of alkenes with low catalyst loadings.
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Affiliation(s)
- Yinghua Shi
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Jianfeng Li
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin 300071
- China
- Collaborative Innovation Center of Chemical Science and Engineering
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58
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Yang Y, Wang H, Ma H. Unprecedented Reaction Pathway of Sterically Crowded Calcium Complexes: Sequential C−N Bond Cleavage Reactions Induced by C−H Bond Activations. Chem Asian J 2016; 12:239-247. [DOI: 10.1002/asia.201601497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 11/28/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Yang Yang
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry; School of Chemistry & Molecular Engineering; East China University of Science and Technology; P.O. Box 310, 130 Meilong Road 200237 Shanghai P.R. China
| | - Haobing Wang
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry; School of Chemistry & Molecular Engineering; East China University of Science and Technology; P.O. Box 310, 130 Meilong Road 200237 Shanghai P.R. China
| | - Haiyan Ma
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry; School of Chemistry & Molecular Engineering; East China University of Science and Technology; P.O. Box 310, 130 Meilong Road 200237 Shanghai P.R. China
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59
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Schnitzler S, Spaniol TP, Okuda J. Reactivity of a Molecular Magnesium Hydride Featuring a Terminal Magnesium–Hydrogen Bond. Inorg Chem 2016; 55:12997-13006. [DOI: 10.1021/acs.inorgchem.6b02509] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Silvia Schnitzler
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
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60
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Fuentes MÁ, Zabala A, Kennedy AR, Mulvey RE. Structural Diversity in Alkali Metal and Alkali Metal Magnesiate Chemistry of the Bulky 2,6-Diisopropyl-N-(trimethylsilyl)anilino Ligand. Chemistry 2016; 22:14968-14978. [PMID: 27573676 PMCID: PMC5096043 DOI: 10.1002/chem.201602683] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Indexed: 11/07/2022]
Abstract
Bulky amido ligands are precious in s-block chemistry, since they can implant complementary strong basic and weak nucleophilic properties within compounds. Recent work has shown the pivotal importance of the base structure with enhancement of basicity and extraordinary regioselectivities possible for cyclic alkali metal magnesiates containing mixed n-butyl/amido ligand sets. This work advances alkali metal and alkali metal magnesiate chemistry of the bulky arylsilyl amido ligand [N(SiMe3 )(Dipp)]- (Dipp=2,6-iPr2 -C6 H3 ). Infinite chain structures of the parent sodium and potassium amides are disclosed, adding to the few known crystallographically characterised unsolvated s-block metal amides. Solvation by N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA) or N,N,N',N'-tetramethylethylenediamine (TMEDA) gives molecular variants of the lithium and sodium amides; whereas for potassium, PMDETA gives a molecular structure, TMEDA affords a novel, hemi-solvated infinite chain. Crystal structures of the first magnesiate examples of this amide in [MMg{N(SiMe3 )(Dipp)}2 (μ-nBu)]∞ (M=Na or K) are also revealed, though these breakdown to their homometallic components in donor solvents as revealed through NMR and DOSY studies.
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Affiliation(s)
- M Ángeles Fuentes
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Andoni Zabala
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Alan R Kennedy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Robert E Mulvey
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK.
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61
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Bellini C, Roisnel T, Carpentier JF, Tobisch S, Sarazin Y. Sequential Barium-Catalysed N−H/H−Si Dehydrogenative Cross-Couplings: Cyclodisilazanes versus Linear Oligosilazanes. Chemistry 2016; 22:15733-15743. [DOI: 10.1002/chem.201603191] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Clément Bellini
- Organometallics, Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
| | - Thierry Roisnel
- Centre de Diffractométrie des Rayons X, Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1; 35042 Rennes France
| | - Jean-François Carpentier
- Organometallics, Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
| | - Sven Tobisch
- School of Chemistry; University of St Andrews, Purdie Building, North Haugh; St Andrews KY16 9ST UK
| | - Yann Sarazin
- Organometallics, Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS; Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
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62
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Sarazin Y, Carpentier JF. Calcium, Strontium and Barium Homogeneous Catalysts for Fine Chemicals Synthesis. CHEM REC 2016; 16:2482-2505. [PMID: 27353504 DOI: 10.1002/tcr.201600067] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 01/22/2023]
Abstract
The large alkaline earths (Ae), calcium, strontium and barium, have in the past 15 years yielded a brand new generation of heteroleptic molecular catalysts for the production of fine chemicals. However, the integrity of these complexes is often plagued by ligand redistribution equilibria in solution. This personal account retraces the paths followed in our research group towards the design of stable heteroleptic alkalino-earth complexes, including the use of intramolecular noncovalent Ae···H-Si and Ae···F-C interactions. Their implementation as homogenous precatalysts for reactions such as the intramolecular and intermolecular hydroamination and hydrophosphination of activated alkenes, the hydrophosphonylation of ketones, and the dehydrogenative coupling of amines and hydrosilanes that enable the efficient and controlled formations of CP, CN, or SiN σ-bonds, is presented in a synthetic perspective that highlights their overall outstanding catalytic performance.
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Affiliation(s)
- Yann Sarazin
- Organometallics: Materials and Catalysis, Institut des Sciences Chimiques de Rennes UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Jean-François Carpentier
- Organometallics: Materials and Catalysis, Institut des Sciences Chimiques de Rennes UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
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63
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Pindwal A, Ellern A, Sadow AD. Homoleptic Divalent Dialkyl Lanthanide-Catalyzed Cross-Dehydrocoupling of Silanes and Amines. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00138] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aradhana Pindwal
- Department
of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Arkady Ellern
- Department
of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Aaron D. Sadow
- Department
of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, Iowa 50011, United States
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64
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65
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Anga S, Sarazin Y, Carpentier JF, Panda TK. Alkali-Metal-Catalyzed Cross-Dehydrogenative Couplings of Hydrosilanes with Amines. ChemCatChem 2016. [DOI: 10.1002/cctc.201501356] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Srinivas Anga
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi - 502 285, Sangareddy Telangana India
| | - Yann Sarazin
- Université de Rennes 1; UMR 6226 - Catalyse et Organométalliques; Bât 10C, Campus de Beaulieu - 35042 Rennes France
| | - Jean-François Carpentier
- Université de Rennes 1; UMR 6226 - Catalyse et Organométalliques; Bât 10C, Campus de Beaulieu - 35042 Rennes France
| | - Tarun K. Panda
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi - 502 285, Sangareddy Telangana India
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66
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Bellini C, Orione C, Carpentier JF, Sarazin Y. Tailored Cyclic and Linear Polycarbosilazanes by Barium-Catalyzed N−H/H−Si Dehydrocoupling Reactions. Angew Chem Int Ed Engl 2016; 55:3744-8. [DOI: 10.1002/anie.201511342] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 12/27/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Clément Bellini
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
| | - Clément Orione
- CRMPO; Université de Rennes 1, Campus de Beaulieu; France
| | - Jean-François Carpentier
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
| | - Yann Sarazin
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
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67
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Bellini C, Orione C, Carpentier JF, Sarazin Y. Tailored Cyclic and Linear Polycarbosilazanes by Barium-Catalyzed N−H/H−Si Dehydrocoupling Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Clément Bellini
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
| | - Clément Orione
- CRMPO; Université de Rennes 1, Campus de Beaulieu; France
| | - Jean-François Carpentier
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
| | - Yann Sarazin
- Equipe OMC; Institut des Sciences Chimiques de Rennes, UMR 6226; CNRS-Université de Rennes 1, Campus de Beaulieu; 263 avenue du Général Leclerc 35042 Rennes Cedex France
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68
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Bellini C, Dorcet V, Carpentier JF, Tobisch S, Sarazin Y. Alkaline-Earth-Catalysed Cross-Dehydrocoupling of Amines and Hydrosilanes: Reactivity Trends, Scope and Mechanism. Chemistry 2016; 22:4564-83. [DOI: 10.1002/chem.201504316] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Clément Bellini
- Organometallics: Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
| | - Vincent Dorcet
- Centre de Diffractométrie des Rayons X; Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-Université de Rennes 1; 35042 Rennes France
| | - Jean-François Carpentier
- Organometallics: Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
| | - Sven Tobisch
- University of St Andrews; School of Chemistry, Purdie Building, North Haugh; St Andrews KY16 9ST UK
| | - Yann Sarazin
- Organometallics: Materials and Catalysis Department; Institut des Sciences Chimiques de Rennes; UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu; 35042 Rennes France
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69
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Hill MS, Liptrot DJ, Weetman C. Alkaline earths as main group reagents in molecular catalysis. Chem Soc Rev 2016; 45:972-88. [PMID: 26797470 DOI: 10.1039/c5cs00880h] [Citation(s) in RCA: 356] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The past decade has witnessed some remarkable advances in our appreciation of the structural and reaction chemistry of the heavier alkaline earth (Ae = Mg, Ca, Sr, Ba) elements. Derived from complexes of these metals in their immutable +2 oxidation state, a broad and widely applicable catalytic chemistry has also emerged, driven by considerations of cost and inherent low toxicity. The considerable adjustments incurred to ionic radius and resultant cation charge density also provide reactivity with significant mechanistic and kinetic variability as group 2 is descended. In an attempt to place these advances in the broader context of contemporary main group element chemistry, this review focusses on the developing state of the art in both multiple bond heterofunctionalisation and cross coupling catalysis. We review specific advances in alkene and alkyne hydroamination and hydrophosphination catalysis and related extensions of this reactivity that allow the synthesis of a wide variety of acyclic and heterocyclic small molecules. The use of heavier alkaline earth hydride derivatives as pre-catalysts and intermediates in multiple bond hydrogenation, hydrosilylation and hydroboration is also described along with the emergence of these and related reagents in a variety of dehydrocoupling processes that allow that facile catalytic construction of Si-C, Si-N and B-N bonds.
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Affiliation(s)
- Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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70
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Melen RL. Dehydrocoupling routes to element–element bonds catalysed by main group compounds. Chem Soc Rev 2016; 45:775-88. [DOI: 10.1039/c5cs00521c] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This Tutorial Review focuses on recent applications of main group compounds in the catalytic synthesis of heteronuclear element–element bonds within the p-block.
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71
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Liptrot DJ, Arrowsmith M, Colebatch AL, Hadlington TJ, Hill MS, Kociok-Köhn G, Mahon MF. Beyond Dehydrocoupling: Group 2 Mediated Boron-Nitrogen Desilacoupling. Angew Chem Int Ed Engl 2015; 54:15280-3. [DOI: 10.1002/anie.201507004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/13/2015] [Indexed: 11/09/2022]
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72
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Liptrot DJ, Arrowsmith M, Colebatch AL, Hadlington TJ, Hill MS, Kociok-Köhn G, Mahon MF. Beyond Dehydrocoupling: Group 2 Mediated Boron-Nitrogen Desilacoupling. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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73
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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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74
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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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75
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Nako AE, Chen W, White AJP, Crimmin MR. Yttrium-Catalyzed Amine–Silane Dehydrocoupling: Extended Reaction Scope with a Phosphorus-Based Ligand. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00607] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adi E. Nako
- Department of Chemistry, Imperial College London, South Kensington SW7 2AZ, U.K
| | - Wenyi Chen
- Department of Chemistry, Imperial College London, South Kensington SW7 2AZ, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, South Kensington SW7 2AZ, U.K
| | - Mark R. Crimmin
- Department of Chemistry, Imperial College London, South Kensington SW7 2AZ, U.K
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76
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Bellini C, Carpentier JF, Tobisch S, Sarazin Y. Barium-Mediated Cross-Dehydrocoupling of Hydrosilanes with Amines: A Theoretical and Experimental Approach. Angew Chem Int Ed Engl 2015; 54:7679-83. [DOI: 10.1002/anie.201502956] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/11/2022]
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77
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Bellini C, Carpentier JF, Tobisch S, Sarazin Y. Barium-Mediated Cross-Dehydrocoupling of Hydrosilanes with Amines: A Theoretical and Experimental Approach. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502956] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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78
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Arrowsmith M, Hill MS, Kociok-Köhn G. Activation of N-Heterocyclic Carbenes by {BeH2} and {Be(H)(Me)} Fragments. Organometallics 2015. [DOI: 10.1021/om501314g] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Merle Arrowsmith
- 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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79
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Mitsudome T, Urayama T, Maeno Z, Mizugaki T, Jitsukawa K, Kaneda K. Highly Efficient Dehydrogenative Coupling of Hydrosilanes with Amines or Amides Using Supported Gold Nanoparticles. Chemistry 2015; 21:3202-5. [DOI: 10.1002/chem.201405601] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Takato Mitsudome
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
| | - Teppei Urayama
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
| | - Zen Maeno
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
| | - Tomoo Mizugaki
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
| | - Koichiro Jitsukawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
| | - Kiyotomi Kaneda
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1–3 Machikaneyama, Toyonaka, Osaka 560‐8531( Japan), Fax: (+81) 6‐6850‐6260
- Research Center for Solar Energy Chemistry, Osaka University, 1‐3 Machikaneyama, Toyonaka, Osaka 560‐8531 (Japan)
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80
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Allen LK, García-Rodríguez R, Wright DS. Stoichiometric and catalytic Si–N bond formation using the p-block base Al(NMe2)3. Dalton Trans 2015; 44:12112-8. [DOI: 10.1039/c5dt00662g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aluminium reagent Al(NMe2)3 acts as a stoichiometric or catalytic reagent in dehydrogenic Si–N bond formation using amines and silanes. The observed catalytic rate law suggests a mechanism involving the silane component in the deprotonation of the amine.
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81
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Erickson KA, Dixon LS, Wright DS, Waterman R. Exploration of tin-catalyzed phosphine dehydrocoupling: Catalyst effects and observation of tin-catalyzed hydrophosphination. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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82
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Nako AE, Gates SJ, Schädel N, White AJP, Crimmin MR. Yttrium-catalysed dehydrocoupling of alanes with amines. Chem Commun (Camb) 2014; 50:9536-8. [DOI: 10.1039/c4cc04484c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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83
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Metal-free transfer hydrogenation of olefins via dehydrocoupling catalysis. Proc Natl Acad Sci U S A 2014; 111:10917-21. [PMID: 25002489 DOI: 10.1073/pnas.1407484111] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A major advance in main-group chemistry in recent years has been the emergence of the reactivity of main-group species that mimics that of transition metal complexes. In this report, the Lewis acidic phosphonium salt [(C6F5)3PF][B(C6F5)4] 1 is shown to catalyze the dehydrocoupling of silanes with amines, thiols, phenols, and carboxylic acids to form the Si-E bond (E = N, S, O) with the liberation of H2 (21 examples). This catalysis, when performed in the presence of a series of olefins, yields the concurrent formation of the products of dehydrocoupling and transfer hydrogenation of the olefin (30 examples). This reactivity provides a strategy for metal-free catalysis of olefin hydrogenations. The mechanisms for both catalytic reactions are proposed and supported by experiment and density functional theory calculations.
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84
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Liptrot DJ, Hill MS, Mahon MF. Heterobimetallic s-Block Hydrides by σ-Bond Metathesis. Chemistry 2014; 20:9871-4. [DOI: 10.1002/chem.201403215] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Indexed: 11/10/2022]
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85
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Roşca SC, Roisnel T, Dorcet V, Carpentier JF, Sarazin Y. Potassium and Well-Defined Neutral and Cationic Calcium Fluoroalkoxide Complexes: Structural Features and Reactivity. Organometallics 2014. [DOI: 10.1021/om500343w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sorin-Claudiu Roşca
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Jean-François Carpentier
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Yann Sarazin
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
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86
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Liptrot DJ, Hill PMS, Mahon MF. Accessing the Single-Electron Manifold: Magnesium-mediated Hydrogen Release from Silanes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403208] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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87
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Liptrot DJ, Hill PMS, Mahon MF. Accessing the Single-Electron Manifold: Magnesium-mediated Hydrogen Release from Silanes. Angew Chem Int Ed Engl 2014; 53:6224-7. [DOI: 10.1002/anie.201403208] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Indexed: 11/09/2022]
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88
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Greb L, Tamke S, Paradies J. Catalytic metal-free Si-N cross-dehydrocoupling. Chem Commun (Camb) 2014; 50:2318-20. [PMID: 24445986 DOI: 10.1039/c3cc49558b] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The metal-free B(C6F5)3 catalyzed dehydrocoupling of hydrosilanes with anilines, carbazoles and indoles is reported. For anilines and carbazoles the reaction proceeds by the liberation of H2 as the sole Si-N coupling byproduct. Indoles react with diphenyl(methyl) hydrosilane to give N-silyl indolines with high diastereoselectivity (d.r. 10 : 1) in excellent yields. A mechanism for this Si-N coupling/hydrogenation sequence is proposed.
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Affiliation(s)
- Lutz Greb
- Institute for Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany.
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