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Harder S, Langer J. Opportunities with calcium Grignard reagents and other heavy alkaline-earth organometallics. Nat Rev Chem 2023; 7:843-853. [PMID: 37935796 DOI: 10.1038/s41570-023-00548-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2023] [Indexed: 11/09/2023]
Abstract
More than a century old, magnesium Grignard reagents remain essential to the toolbox of organic chemists. Although similar reagents with the neighbouring group 2 metal Ca have been explored, the considerably higher polarity and reactivity of the Ca-C bond result in undesired decomposition pathways. Ca Grignard reagents have found academic interest but have never fully developed into an established synthetic tool. Recent research activities, however, provide facile access to these highly reactive organocalcium species, including in situ preparation and ball milling approaches to tackle the challenge of controlling their extreme sensitivity. Heavier Grignard reagents are not just more reactive but profit from unique chemical transformations. Insight into the transition metal-like properties of Ca, Sr and Ba is only just emerging. Considering the rapidly developing field of alkaline-earth metal-mediated catalysis, heavy Grignard reagents will probably have a bright future.
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Affiliation(s)
- Sjoerd Harder
- Inorganic Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany.
| | - Jens Langer
- Inorganic Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
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2
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Schüler P, Sengupta S, Koch A, Görls H, Krieck S, Westerhausen M. In situ Grignard Metalation Method, Part II: Scope of the One-Pot Synthesis of Organocalcium Compounds. Chemistry 2022; 28:e202201897. [PMID: 35912418 PMCID: PMC9804548 DOI: 10.1002/chem.202201897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Indexed: 01/05/2023]
Abstract
The in situ Grignard Metalation Method (iGMM) is a straightforward one-pot strategy to synthesize alkaline-earth metal amides in multi-gram scale with high yields via addition of bromoethane to an ethereal suspension of a primary or secondary amine and magnesium (Part I) or calcium (Part II). This method is highly advantageous because no activation of calcium is required prior to the reaction. Contrary to the magnesium-based iGMM, there are some limitations, the most conspicuous one is the large influence of steric factors. The preparation of Ca(hmds)2 succeeds smoothly within a few hours with excellent yields opening the opportunity to prepare large amounts of this reagent. Side reactions and transfer of the iGMM to substituted anilines and N-heterocycles as well as other H-acidic substrates such as cyclopentadienes are studied. Bulky amidines cannot be converted directly to calcium amidinates via the iGMM but stoichiometric calciation with Ca(hmds)2 enables their preparation.
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Affiliation(s)
- Philipp Schüler
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Simon Sengupta
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Alexander Koch
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
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3
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Stevens MP, Spray E, Vitorica-Yrezabal IJ, Singh K, Timmermann VM, Sotorrios L, Macgregor SA, Ortu F. Synthesis, characterisation and reactivity of group 2 complexes with a thiopyridyl scorpionate ligand. Dalton Trans 2022; 51:11922-11936. [PMID: 35876311 DOI: 10.1039/d2dt02012b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Herein we report the reactivity of the proligand tris(2-pyridylthio)methane (HTptm) with various Alkaline Earth (AE) reagents: (1) dialkylmagnesium reagents and (2) AE bis-amides (AE = Mg-Ba). Heteroleptic complexes of general formulae [Mg(Tptm)(R)] (R = Me, nBu; Tptm = {C(S-C5H4N)3}-) and [AE(Tptm)(N'')] (AE = Mg-Ba; N'' = {N(SiMe3)2}-) were targeted from the reaction of HTptm with R2Mg or [AE(N'')2]2. Reaction of the proligand with dialkylmagnesium reagents led to formation of [{Mg(κ3C,N,N-C{Bu}{S-C5H4N}2)(μ-S-C5H4N)}2] (1) and [{Mg(κ3C,N,N-C{Me}{S-C5H4N}2)(μ-OSiMe3)}2] (2) respectively, as a result of a novel transfer of an alkyl group onto the methanide carbon with concomitant C-S bond cleavage. However, reactivity of bis-amide precursors for Mg and Ca did afford the target species [AE(Tptm)(N'')] (3-AE; AE = Mg-Ca), although these proved susceptible to ligand degradation processes. DFT calculations show that alkyl transfer in the putative [Mg(Tptm)(nBu)] (1m') system and amide transfer in 3-Ca is a facile process that induces C-S bond cleavage in the Tptm ligand. 3-Mg and 3-Ca were also tested as catalysts for the hydrophosphination of selected alkenes and alkynes, including the first example of mono-hydrophosphination of 4-ethynylpyridine which was achieved with high conversions and excellent regio- and stereochemical control.
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Affiliation(s)
- Matthew P Stevens
- School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, UK.
| | - Emily Spray
- School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, UK.
| | | | - Kuldip Singh
- School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, UK.
| | - Vanessa M Timmermann
- School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, UK.
| | - Lia Sotorrios
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - Fabrizio Ortu
- School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, UK.
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4
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Jörges M, Kroll A, Kelling L, Gauld R, Mallick B, Huber SM, Gessner VH. Synthesis, Crystal and Electronic Structures of a Thiophosphinoyl- and Amino-Substituted Metallated Ylide. ChemistryOpen 2021; 10:1089-1094. [PMID: 34569718 PMCID: PMC8562316 DOI: 10.1002/open.202100187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/08/2021] [Indexed: 11/24/2022] Open
Abstract
α-Metallated ylides have revealed themselves to be versatile reagents for the introduction of ylide groups. Herein, we report the synthesis of the thiophosphinoyl and piperidyl (Pip) substituted α-metallated ylide [Ph2 (Pip)P=C-P(S)Ph2 ]M (M=Li, Na, K) through a four-step synthetic procedure starting from diphenylmethylphosphine sulfide. Metallation of the ylide intermediate was successfully accomplished with different alkali metal bases delivering the lithium, sodium and potassium salts, the latter isolable in high yields. Structure analyses of the lithium and potassium compounds in the solid state with and without crown ether revealed different aggregates (monomer, dimer and hexamer) with the metals coordinated by the thiophosphoryl moiety and ylidic carbon atom. Although the piperidyl group does not coordinate to the metal, it significantly contributes to the stability of the yldiide by charge delocalization through negative hyperconjugation.
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Affiliation(s)
- Mike Jörges
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Alexander Kroll
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Leif Kelling
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Richard Gauld
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Bert Mallick
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Stefan M. Huber
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
| | - Viktoria H. Gessner
- Faculty of Chemistry and BiochemistryRuhr-University BochumUniversitätsstraße 15044801BochumGermany
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5
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Cebi E, Klett J. Endohedral Mixed Aggregates: Sodium Alkoxide Cages with Organic or Inorganic Central Anions and Variable Hull. Chemistry 2021; 27:12693-12701. [PMID: 33938049 PMCID: PMC8453731 DOI: 10.1002/chem.202100912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Indexed: 11/30/2022]
Abstract
Alkali metal alkoxides are widely used in chemistry due to their Brønsted basic and nucleophilic properties. Potassium alkoxides assist alkyllithium in the metalation of hydrocarbons in Lochmann‐Schlosser‐bases. Both compounds form mixed aggregates, which enhance the thermal stability, solubility, and the basic reactivity of these mixtures. A very unusual spherical mixed alkoxy aggregate was discovered by Grützmacher et al., where a central dihydrogen phosphide anion is surrounded by a highly dynamic shell of thirteen sodium atoms and a hull of twelve tert‐butoxide groups. This structural motif can be reproduced by a reaction of trimethylsilyl compounds of methane, halogens, or pseudo‐halogens with excess sodium tert‐butoxide. A nucleophilic substitution releases the corresponding anion, which is then encapsulated by the sodium alkoxide units. The compounds are soluble in hydrocarbon solvents, enabling studies of solutions by high‐resolution NMR spectroscopy and IR/Raman studies of the crystalline materials.
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Affiliation(s)
- Erkam Cebi
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
| | - Jan Klett
- Department of ChemistryJohannes Gutenberg University MainzDuesbergweg 10–1455128MainzGermany
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6
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Khristolyubov DO, Lyubov DM, Trifonov AA. Alkyl complexes of divalent lanthanides and heavy alkaline earth metals. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4992] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Selikhov AN, Cherkasov AV, Nelyubina YV, Trifonov AA. Highly basic alkyl-substituted bis(benzhydryl) CaII and YbII complexes with β-CH–M agostic interactions. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.04.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Selikhov AN, Cherkasov AV, Nelyubina YV, Trifonov AA. Highly basic alkyl-substituted bis(benzhydryl) CaII and YbII complexes with β-CH–M agostic interactions. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Schuhknecht D, Spaniol TP, Yang Y, Maron L, Okuda J. Reactivity of a Molecular Calcium Hydride Cation ([CaH] +) Supported by an NNNN Macrocycle. Inorg Chem 2020; 59:9406-9415. [PMID: 32543844 DOI: 10.1021/acs.inorgchem.0c01289] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The hydride ligand in the cationic calcium hydride supported by a NNNN-type macrocycle, [(Me4TACD)2Ca2(μ-H)2(THF)][BAr4]2 (1; Me4TACD = 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane; THF = tetrahydrofuran; BAr4 = B(C6H3-3,5-Me2)4), shows, in addition to its Brönsted basicity toward weak acids, a pronounced nucleophilicity resulting in nucleophilic substitution or insertion (addition) at a silicon or sp2 carbon center. Terminal acetylenes RC≡CH (R = SiMe3, cyclopropyl) as well as 1,4-diphenylbutadiene were deprotonated by 1 to give dinuclear complexes [(Me4TACD)2Ca2(μ-C≡CR)2][BAr4]2 (2a, R = SiMe3; 2b, R = cyclopropyl) and [(Me4TACD)2Ca2(μ2-η4-1,4-Ph2C4H2)][BAr4]2 (3) with H2 evolution. The addition reaction with BH3(THF) gave a tetrahydridoborate complex, [(Me4TACD)Ca(BH4)(THF)2][BAr4] (4), with κ2-H2BH2 coordination in the solid state, suggesting a pronounced Lewis acidic calcium center. The behavior resulting from both Lewis acidity and hydricity becomes apparent in the nucleophilic substitution of fluorobenzene by 1 to give benzene and the dimeric fluoride complex [(Me4TACD)2Ca2(μ-F)2(THF)][BAr4]2·2.5THF (5). Analogous nucleophilic substitution reaction is observed for heterofunctionalized organosilanes XSiR3 [X = I, N(SiHMe2)2, N3; R = Me3 or HMe2], which resulted in the formation of calcium complexes [(Me4TACD)Ca(X)(THF)n][BAr4] (6-8) containing an X ligand along with hydrosilane HSiR3. An insertion reaction by 1 was observed with CO2 and CO to give dinuclear formato complex [(Me4TACD)2Ca2(μ-OCHO)2][BAr4]2 (9) and cis-enediolato complex [(Me4TACD)2Ca2(μ-OCH═CHO)][BAr4]2·3.5THF (10), respectively. The latter is believed to have been formed as a result of the dimerization of an initially generated formyl or oxymethylene complex, [(Me4TACD)Ca(OCH)]+.
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Affiliation(s)
- Danny Schuhknecht
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Thomas P Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Yan Yang
- CNRS, INSA, UPS, UMR 5215, LPCNO, Université de Toulouse, 135 avenue de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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10
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Li N, Guan BT. A Dialkyl Calcium Carbene Adduct: Synthesis, Structure, and Catalytic Cross-Dehydrocoupling of Silanes with Amines. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900168] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Nan Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Bing-Tao Guan
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 P.R. China
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11
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Selikhov AN, Plankin GS, Cherkasov AV, Shavyrin AS, Louyriac E, Maron L, Trifonov AA. Thermally Stable Ln(II) and Ca(II) Bis(benzhydryl) Complexes: Excellent Precatalysts for Intermolecular Hydrophosphination of C-C Multiple Bonds. Inorg Chem 2019; 58:5325-5334. [PMID: 30933487 DOI: 10.1021/acs.inorgchem.9b00490] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of Ln(II) and Ca(II) bis(alkyl) complexes with bulky benzhydryl ligands, [( p- tBu-C6H4)2CH]2M(L n) (M = Sm, L = DME, n = 2 (1); M = Sm, Yb, Ca, L = TMEDA, n = 1 (2, 3, 4), were synthesized by the salt-metathesis reaction of MI2(THF) n ( n = 0-2) and [( p- tBu-C6H4)2CH]-Na+. In complex 1, the benzhydryl ligands are bound to the metal center in η2-coordination mode. Unlike complex 1, in isomorphous complexes 3 and 4, due to the coordination unsaturation of the metal center, the both benzhydryl ligands coordinate to the metal in η3-fashion. In complex 2, one ligand is η3-coordinated while the second one is η4-coordinated to the Sm(II) ion. Complexes 2-4 demonstrated unprecedented thermal stability: no evidence of decomposition was observed after heating their solutions in C6D6 at 100 °C during 72 h. Complex 1 behaves differently: thermolysis in C6D6 solution at 75 °C results in total decomposition in 8 h. Addition of DME promotes decomposition of 2-4 and makes it feasible at 40 °C. Complexes 1-4 demonstrated high catalytic activity and excellent regio- and chemoselectivities in intermolecular hydrophosphination of double and triple C-C bonds with both primary and secondary phosphines. Complexes 2 and 3 enable addition of PhPH2 toward the internal C═C bond of Z- and E-stilbenes with 100% conversion under mild conditions. Double sequential hydrophosphination of phenylacetylene with Ph2PH and PhPH2 was realized due to the application of Yb(II) complex as a catalyst.
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Affiliation(s)
- Alexander N Selikhov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences , 49 Tropinina str. , 603137 , Nizhny Novgorod , GSP-445, Russia.,A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences , 28 Vavilova str. , 119991 , Moscow , GSP-1, Russia
| | - Gleb S Plankin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences , 49 Tropinina str. , 603137 , Nizhny Novgorod , GSP-445, Russia
| | - Anton V Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences , 49 Tropinina str. , 603137 , Nizhny Novgorod , GSP-445, Russia
| | - Andrey S Shavyrin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences , 49 Tropinina str. , 603137 , Nizhny Novgorod , GSP-445, Russia
| | - Elisa Louyriac
- Laboratoire de Physique et Chimie des Nanoobjets, LPCNO, CNRS & INSA , Université Paul Sabatier , 135 Avenue de Rangueil , 31077 Toulouse , France
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nanoobjets, LPCNO, CNRS & INSA , Université Paul Sabatier , 135 Avenue de Rangueil , 31077 Toulouse , France
| | - Alexander A Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences , 49 Tropinina str. , 603137 , Nizhny Novgorod , GSP-445, Russia.,A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences , 28 Vavilova str. , 119991 , Moscow , GSP-1, Russia
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12
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Wilson ASS, Hill MS, Mahon MF. Calcium Hydride Insertion Reactions with Unsaturated C–C Bonds. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00743] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew S. S. Wilson
- 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
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13
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Koch A, Dufrois Q, Wirgenings M, Görls H, Krieck S, Etienne M, Pohnert G, Westerhausen M. Direct Synthesis of Heavy Grignard Reagents: Challenges, Limitations, and Derivatization. Chemistry 2018; 24:16840-16850. [PMID: 30095189 DOI: 10.1002/chem.201803518] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Indexed: 01/14/2023]
Abstract
The direct synthesis of organocalcium compounds (heavy Grignard reagents) by the reduction of organyl halides with activated calcium powder succeeded in a straightforward manner for organic bromides and iodides that are bound at sp2 -hybridized carbon atoms. Extension of this strategy to alkyl halides was very limited, and only the reduction of trialkylsilylmethyl bromides and iodides with activated calcium allowed the isolation of the corresponding heavy Grignard reagents. Substitution of only one hydrogen atom of the methylene moiety by a phenyl or methyl group directed this reduction toward the Wurtz-type coupling and the formation of calcium halide and the corresponding C-C coupling product. The stability of the methylcalcium and benzylcalcium derivatives in ethereal solvents suggests an unexpected reaction behavior of the intermediate organyl halide radical anions. Quantum chemical calculations verify a dependency between the ease of preparative access to organocalcium complexes and the C-I bond lengths of the organyl iodides. The bulkiness of the trialkylsilyl group is of minor importance. Chloromethyltrimethylsilane did not react with activated calcium; however, halogen-exchange reactions allowed the isolation of [Ca(CH2 SiMe3 )(thf)3 (μ-Cl)]2 . Furthermore, the metathetical approach of reacting [Ca(CH2 SiMe3 )I(thf)4 ] with KN(SiMe3 )2 and the addition of N,N,N',N'',N''-pentamethyldiethylenetriamine (pmdeta) allowed the isolation of heteroleptic [CaCH2 SiMe3 {N(SiMe3 )2 }(pmdeta)]. In the reaction of this derivative with phenylsilane, the trimethylsilylmethyl group proved to be more reactive than the bis(trimethylsilyl)amido substituent.
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Affiliation(s)
- Alexander Koch
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Quentin Dufrois
- LCC, CNRS, UPS, Université de Toulouse, 31077, Toulouse, France
| | - Marino Wirgenings
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Lessingstrasse 8, 07743, Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
| | - Michel Etienne
- LCC, CNRS, UPS, Université de Toulouse, 31077, Toulouse, France
| | - Georg Pohnert
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Lessingstrasse 8, 07743, Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, 07743, Jena, Germany
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14
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Koch A, Krieck S, Görls H, Westerhausen M. 5-Methyl-2-thienylcalcium iodide. Dalton Trans 2018; 47:12534-12539. [PMID: 29725683 DOI: 10.1039/c8dt01398e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction of 2-bromo- and 3-bromothiophene with calcium powder gives impure thienylcalcium complexes due to interference of various subsequent metalation and calcium-halogen exchange reactions as well as ether degradation. Therefore, calcium-iodine exchange succeeds via the reaction of trimethylsilylmethylcalcium halide with 3-iodothiophene in tetrahydrofuran at -78 °C in the presence of chloro-trimethylsilane, leading to the quantitative formation of 3-(trimethylsilyl)thiophene. The synthesis and isolation of a thienylcalcium halide, a heavy Grignard reagent with a thienyl group, is possible via the reduction of 2-iodo-5-methylthiophene with activated calcium in THF. Substitution of the thf ligands in 5-methyl-2-thienylcalcium iodide ([5-MeThien-2-Ca(thf)4I], 1) by dissolution in tetrahydropyran (THP) leads to the thp complex of 5-methyl-2-thienylcalcium iodide ([5-MeThien-2-Ca(thp)4I], 2). A low field shift of the calcium-bound carbon atom is characteristic of thienylcalcium complexes.
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Affiliation(s)
- Alexander Koch
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, D-07743 Jena, Germany.
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15
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Wilson ASS, Hill MS, Mahon MF, Dinoi C, Maron L. Organocalcium-mediated nucleophilic alkylation of benzene. Science 2018; 358:1168-1171. [PMID: 29191904 DOI: 10.1126/science.aao5923] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 10/12/2017] [Indexed: 11/02/2022]
Abstract
The electrophilic aromatic substitution of a C-H bond of benzene is one of the archetypal transformations of organic chemistry. In contrast, the electron-rich π-system of benzene is highly resistant to reactions with electron-rich and negatively charged organic nucleophiles. Here, we report that this previously insurmountable electronic repulsion may be overcome through the use of sufficiently potent organocalcium nucleophiles. Calcium n-alkyl derivatives-synthesized by reaction of ethene, but-1-ene, and hex-1-ene with a dimeric calcium hydride-react with protio and deutero benzene at 60°C through nucleophilic substitution of an aromatic C-D/H bond. These reactions produce the n-alkyl benzenes with regeneration of the calcium hydride. Density functional theory calculations implicate an unstabilized Meisenheimer complex in the C-H activation transition state.
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Affiliation(s)
- Andrew S S Wilson
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Chiara Dinoi
- Université de Toulouse et CNRS, Institut National des Sciences Appliquées, Université Toulouse III-Paul Sabatier, UMR 5215, LPCNO, 135 Avenue de Rangueil, F-31077 Toulouse, France
| | - Laurent Maron
- Université de Toulouse et CNRS, Institut National des Sciences Appliquées, Université Toulouse III-Paul Sabatier, UMR 5215, LPCNO, 135 Avenue de Rangueil, F-31077 Toulouse, France.
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16
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Wei B, Zhang WX, Xi Z. Well-defined styryl and biphenyl calcium complexes from dilithio compounds and calcium iodide: synthesis, structure and reactivity toward nitrous oxide. Dalton Trans 2018; 47:12540-12545. [PMID: 29756145 DOI: 10.1039/c8dt01046c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient synthesis and structure elucidation of carbon–calcium σ-bonded compounds are of remarkable interest and importance in organometallic chemistry of the heavier s-block metals.
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Affiliation(s)
- Baosheng Wei
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
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17
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Koch A, Wirgenings M, Krieck S, Görls H, Pohnert G, Westerhausen M. Hydrocarbon-Soluble Bis(trimethylsilylmethyl)calcium and Calcium–Iodine Exchange Reactions at sp2-Hybrized Carbon Atoms. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00592] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Koch
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Marino Wirgenings
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Georg Pohnert
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry and ‡Institute of Inorganic and Analytical
Chemistry, Friedrich-Schiller-University Jena, D-07743 Jena, Germany
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18
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Koch A, Krieck S, Görls H, Westerhausen M. Directed Ortho Calciation of 1,3-Bis(3-isopropylimidazol-2-ylidene)benzene. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00303] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Koch
- Friedrich Schiller University Jena, Institute of Inorganic and Analytical
Chemistry Humboldtstrasse
8, D-07743 Jena, Germany
| | - Sven Krieck
- Friedrich Schiller University Jena, Institute of Inorganic and Analytical
Chemistry Humboldtstrasse
8, D-07743 Jena, Germany
| | - Helmar Görls
- Friedrich Schiller University Jena, Institute of Inorganic and Analytical
Chemistry Humboldtstrasse
8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Friedrich Schiller University Jena, Institute of Inorganic and Analytical
Chemistry Humboldtstrasse
8, D-07743 Jena, Germany
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19
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Wei B, Liu L, Zhang WX, Xi Z. Synthesis and Structural Characterization of Butadienylcalcium-based Heavy Grignard Reagents and a Ca4[O] Inverse Crown Ether Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Baosheng Wei
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Liang Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Shanghai 200032 China
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20
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Wei B, Liu L, Zhang WX, Xi Z. Synthesis and Structural Characterization of Butadienylcalcium-based Heavy Grignard Reagents and a Ca4[O] Inverse Crown Ether Complex. Angew Chem Int Ed Engl 2017; 56:9188-9192. [DOI: 10.1002/anie.201704176] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 05/20/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Baosheng Wei
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Liang Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing 100871 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Shanghai 200032 China
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21
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Causero A, Elsen H, Pahl J, Harder S. Calcium Hydride Reactivity: Formation of an Anionic N-Heterocyclic Olefin Ligand. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703037] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Andrea Causero
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Holger Elsen
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Jürgen Pahl
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
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22
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Causero A, Elsen H, Pahl J, Harder S. Calcium Hydride Reactivity: Formation of an Anionic N-Heterocyclic Olefin Ligand. Angew Chem Int Ed Engl 2017; 56:6906-6910. [DOI: 10.1002/anie.201703037] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Andrea Causero
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Holger Elsen
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Jürgen Pahl
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry; Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
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23
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Roşca SC, Caytan E, Dorcet V, Roisnel T, Carpentier JF, Sarazin Y. π Ligands in Alkaline Earth Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sorin-Claudiu Roşca
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Elsa Caytan
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Jean-François Carpentier
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Yann Sarazin
- Université de Rennes
1, CNRS, UMR 6226, Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
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24
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Romero N, Dufrois Q, Vendier L, Dinoi C, Etienne M. Highly Fluorinated Tris(indazolyl)borate Hydrocarbyl Complexes of Calcium and Magnesium: Synthesis and Structural Studies. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00783] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nuria Romero
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
| | - Quentin Dufrois
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
| | - Laure Vendier
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
| | - Chiara Dinoi
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
| | - Michel Etienne
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
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25
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Roşca SC, Dorcet V, Roisnel T, Carpentier JF, Sarazin Y. Tethered cationic alkaline earth – olefin complexes. Dalton Trans 2017; 46:14785-14794. [DOI: 10.1039/c7dt03300a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The utilisation of a specifically tailored aminofluoroalcohol possessing both a methoxy and an olefin dangling side arms enables the preparation of the first examples of discrete calcium- and strontium-olefin cationic complexes.
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Affiliation(s)
- Sorin-Claudiu Roşca
- Université de Rennes 1
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes Cedex
| | - Vincent Dorcet
- Université de Rennes 1
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes Cedex
| | - Thierry Roisnel
- Université de Rennes 1
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes Cedex
| | | | - Yann Sarazin
- Université de Rennes 1
- CNRS
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- F-35042 Rennes Cedex
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26
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Westerhausen M, Koch A, Görls H, Krieck S. Heavy Grignard Reagents: Synthesis, Physical and Structural Properties, Chemical Behavior, and Reactivity. Chemistry 2016; 23:1456-1483. [DOI: 10.1002/chem.201603786] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Alexander Koch
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry; Friedrich-Schiller-Universität Jena; Humboldtstraße 8 07743 Jena Germany
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27
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Reduction of Bromo- and Iodo-2,6-bis(diphenylphosphanylmethyl)benzene with Magnesium and Calcium. INORGANICS 2016. [DOI: 10.3390/inorganics4040039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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28
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Wolf BM, Maichle-Mössmer C, Anwander R. Synthese und Reaktivität von diskreten Calciumimiden. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607608] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Benjamin M. Wolf
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Deutschland
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Deutschland
| | - Reiner Anwander
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Deutschland
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29
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Wolf BM, Maichle-Mössmer C, Anwander R. Synthesis and Reactivity of Discrete Calcium Imides. Angew Chem Int Ed Engl 2016; 55:13893-13897. [DOI: 10.1002/anie.201607608] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Benjamin M. Wolf
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
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30
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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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31
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Yadav S, Swamy VSVSN, Gonnade R, Sen SS. Benz-amidinato Stabilized a Monomeric Calcium Iodide and a Lithium Calciate(II) Cluster featuring Group 1 and Group 2 Elements. ChemistrySelect 2016. [DOI: 10.1002/slct.201600285] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sandeep Yadav
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - V. S. V. S. N. Swamy
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Rajesh Gonnade
- Physical and Material Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
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32
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Roşca SC, Dinoi C, Caytan E, Dorcet V, Etienne M, Carpentier JF, Sarazin Y. Alkaline Earth-Olefin Complexes with Secondary Interactions. Chemistry 2016; 22:6505-9. [DOI: 10.1002/chem.201601096] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Sorin-Claudiu Roşca
- 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
| | - Chiara Dinoi
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, INPT, LCC; 31077 Toulouse Cedex 4 France
| | - Elsa Caytan
- 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
| | - Vincent Dorcet
- 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
| | - Michel Etienne
- CNRS; LCC (Laboratoire de Chimie de Coordination); 205 route de Narbonne 31077 Toulouse Cedex 4 France
- Université de Toulouse; UPS, INPT, LCC; 31077 Toulouse Cedex 4 France
| | - Jean-François Carpentier
- 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
- 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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