1
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Andreev MV, Bogdanov VS, Aysin RR, Smol’yakov AF, Dolgushin FM, Burlakov VV. Vinyl-Acetamidination of In Situ-Generated Acetylenic Complexes of Zirconocenes: Thermal Isomerization of Obtained Zirconabicycles. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maxim V. Andreev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Vyacheslav S. Bogdanov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Rinat R. Aysin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Alexander F. Smol’yakov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Str. 6, Moscow 117198, Russia
| | - Fedor M. Dolgushin
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow 119071, Russia
| | - Vladimir V. Burlakov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
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2
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Kiel GR, Bergman HM, Tilley TD. Site-selective [2 + 2 + n] cycloadditions for rapid, scalable access to alkynylated polycyclic aromatic hydrocarbons. Chem Sci 2020; 11:3028-3035. [PMID: 34122806 PMCID: PMC8157499 DOI: 10.1039/c9sc06102a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are attractive synthetic building blocks for more complex conjugated nanocarbons, but their use for this purpose requires appreciable quantities of a PAH with reactive functional groups. Despite tremendous recent advances, most synthetic methods cannot satisfy these demands. Here we present a general and scalable [2 + 2 + n] (n = 1 or 2) cycloaddition strategy to access PAHs that are decorated with synthetically versatile alkynyl groups and its application to seven structurally diverse PAH ring systems (thirteen new alkynylated PAHs in total). The critical discovery is the site-selectivity of an Ir-catalyzed [2 + 2 + 2] cycloaddition, which preferentially cyclizes tethered diyne units with preservation of other (peripheral) alkynyl groups. The potential for generalization of the site-selectivity to other [2 + 2 + n] reactions is demonstrated by identification of a Cp2Zr-mediated [2 + 2 + 1]/metallacycle transfer sequence for synthesis of an alkynylated, selenophene-annulated PAH. The new PAHs are excellent synthons for macrocyclic conjugated nanocarbons. As a proof of concept, four were subjected to alkyne metathesis catalysis to afford large, PAH-containing arylene ethylene macrocycles, which possess a range of cavity sizes reaching well into the nanometer regime. Notably, these high-yielding macrocyclizations establish that synthetically convenient pentynyl groups can be effective for metathesis since the 4-octyne byproduct is sequestered by 5 Å MS. Most importantly, this work is a demonstration of how site-selective reactions can be harnessed to rapidly build up structural complexity in a practical, scalable fashion. An orthogonal [2 + 2 + n] cycloaddition/alkyne metathesis reaction sequence enables streamlined access to conjugated macrocyclic nanocarbons.![]()
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Affiliation(s)
- Gavin R Kiel
- Department of Chemistry, University of California, Berkeley Berkeley California 94720 USA
| | - Harrison M Bergman
- Department of Chemistry, University of California, Berkeley Berkeley California 94720 USA
| | - T Don Tilley
- Department of Chemistry, University of California, Berkeley Berkeley California 94720 USA
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3
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Laskar P, Yamamoto K, Nishi K, Ikeda H, Tsurugi H, Mashima K. Cβ–Cβ Bond Fission of Metallacyclopentadiene over a Low-Valent Ditantalum Scaffold. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Payel Laskar
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Keishi Yamamoto
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kohei Nishi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hideaki Ikeda
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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4
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Tomaschun G, Altenburger K, Reiß F, Becker L, Spannenberg A, Arndt P, Jiao H, Rosenthal U. Group 4 Metallocene Complexes and Cyanopyridines: Coordination or Coupling to Metallacycles. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501235] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gabriele Tomaschun
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl‐von‐Ossietzky‐Str. 9–11, 26129 Oldenburg, Germany
| | - Kai Altenburger
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Fabian Reiß
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Lisanne Becker
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Anke Spannenberg
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Perdita Arndt
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Haijun Jiao
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
| | - Uwe Rosenthal
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Str. 29a, 18059 Rostock, Germany www.catalysis.de
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5
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Altenburger K, Baumann W, Spannenberg A, Arndt P, Rosenthal U. Coordination Behavior and Reactivity of α‐Heterosubstituted Trimethylsilylalkynes at Titano‐ and Zirconocene. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402851] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kai Altenburger
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock, Germany, http://www.catalysis.de
| | - Wolfgang Baumann
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock, Germany, http://www.catalysis.de
| | - Anke Spannenberg
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock, Germany, http://www.catalysis.de
| | - Perdita Arndt
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock, Germany, http://www.catalysis.de
| | - Uwe Rosenthal
- Leibniz‐Institut für Katalyse e.V. an der Universität Rostock, Albert‐Einstein‐Strasse 29a, 18059 Rostock, Germany, http://www.catalysis.de
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6
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Becker L, Strehler F, Korb M, Arndt P, Spannenberg A, Baumann W, Lang H, Rosenthal U. Unusual nitrile-nitrile and nitrile-alkyne coupling of Fc-C≡N and FC-C≡C-C≡N. Chemistry 2014; 20:3061-8. [PMID: 24615841 DOI: 10.1002/chem.201304478] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Indexed: 11/11/2022]
Abstract
The reactions of the Group 4 metallocene alkyne complexes, [Cp*2M(η2-Me3SiC2SiMe3)] (1 a: M=Ti, 1 b: M=Zr, Cp*=η5-pentamethylcyclopentadienyl), with the ferrocenyl nitriles, Fc-CN and Fc-C≡C-C≡N (Fc=Fe(η5-C5H5)(η5-C5H4)), is described. In case of Fc-C≡N an unusual nitrile–nitrile C-C homocoupling was observed and 1-metalla-2,5-diaza-cyclopenta-2,4-dienes (3 a, b) were obtained. As the first step of the reaction with 1 b, the nitrile was coordinated to give [Cp*2Zr(η2-Me3SiC2SiMe3)(N≡C-Fc)] (2 b). The reactions with the 3-ferrocenyl-2-propyne-nitrile FcC≡C-C≡N lead to an alkyne–nitrile C-C coupling of two substrates and the formation of 1-metalla-2-aza-cyclopenta-2,4-dienes (4 a, b). For M=Zr, the compound is stabilized by dimerization as evidenced by single-crystal X-ray structure analysis. The electrochemical behavior of 3 a, b and 4 a, b was investigated, showing decomposition after oxidation, leading to different redox-active products.
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7
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Àrias Ò, Petrov AR, Bannenberg T, Altenburger K, Arndt P, Jones PG, Rosenthal U, Tamm M. Titanocene and Zirconocene Complexes with Diaminoacetylenes: Formation of Unusual Metallacycles and Fulvene Complexes. Organometallics 2014. [DOI: 10.1021/om500121p] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Òscar Àrias
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, D-38106 Braunschweig, Germany
| | - Alex R. Petrov
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, D-38106 Braunschweig, Germany
| | - Thomas Bannenberg
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, D-38106 Braunschweig, Germany
| | - Kai Altenburger
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Perdita Arndt
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Peter G. Jones
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, D-38106 Braunschweig, Germany
| | - Uwe Rosenthal
- Leibniz-Institut
für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Matthias Tamm
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring
30, D-38106 Braunschweig, Germany
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8
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Interaction of the five-membered zirconacyclocumulene complex Cp2Zr(η4-tBuC4tBu) with acetylenes. Synthesis of zirconacyclopentadienes and seven-membered zirconacyclocumulenes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.07.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Becker L, Arndt P, Jiao H, Spannenberg A, Rosenthal U. Nitrile-nitrile C-C coupling at group 4 metallocenes to form 1-metalla-2,5-diaza-cyclopenta-2,4-dienes: synthesis and reactivity. Angew Chem Int Ed Engl 2013; 52:11396-400. [PMID: 24027096 DOI: 10.1002/anie.201303748] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/25/2013] [Indexed: 11/08/2022]
Abstract
The CC coupling of aryl nitriles at Group 4 metallocenes leads to unusual ring-strained 1-metalla-2,5-diaza-cyclopenta-2,4-dienes. The structural, energetic, and chemical properties of these complexes are described. The reactions of these compounds towards CH3 CN, H2 , CO2 , and HCl usually lead to the release of one nitrile and its replacement by different co-substrates.
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Affiliation(s)
- Lisanne Becker
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock (Germany)
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10
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Becker L, Arndt P, Jiao H, Spannenberg A, Rosenthal U. Nitril-Nitril-C-C-Kupplungen an Gruppe-4-Metallocenen zu 1-Metalla-2,5-diazacyclopenta-2,4-dienen und deren Reaktionen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303748] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Becker L, Burlakov VV, Arndt P, Spannenberg A, Baumann W, Jiao H, Rosenthal U. Reactions of Group 4 Metallocene Complexes with Mono- and Diphenylacetonitrile: Formation of Unusual Four- and Six-Membered Metallacycles. Chemistry 2013; 19:4230-7. [DOI: 10.1002/chem.201204211] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Indexed: 11/07/2022]
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12
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Gessner VH, Tannaci JF, Miller AD, Tilley TD. Assembly of macrocycles by zirconocene-mediated, reversible carbon-carbon bond formation. Acc Chem Res 2011; 44:435-46. [PMID: 21473633 DOI: 10.1021/ar100148g] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Macrocyclic compounds have attracted considerable attention in numerous applications, including host-guest chemistry, chemical sensing, catalysis, and materials science. A major obstacle, however, is the limited number of convenient, versatile, and high-yielding synthetic routes to functionalized macrocycles. Macrocyclic compounds have been typically synthesized by ring-closing or condensation reactions, but many of these procedures produce mixtures of oligomers and cyclic compounds. As a result, macrocycle syntheses are often associated with difficult separations and low yields. Some successful approaches that circumvent these problems are based on "self-assembly" processes utilizing reversible bond-forming reactions, but for many applications, it is essential that the resulting macrocycle be built with a strong covalent bond network. In this Account, we describe how zirconocene-mediated reductive couplings of alkynes can provide reversible carbon-carbon bond-forming reactions well-suited for this purpose. Zirconocene coupling of alkenes and alkynes has been used extensively as a source of novel, versatile pathways to functionalized organic compounds. Here, we describe the development of zirconocene-mediated reductive couplings as a highly efficient method for the preparation of macrocycles and cages with diverse compositions, sizes, and shapes. This methodology is based on the reversible, regioselective coupling of alkynes with bulky substituents. In particular, silyl substituents provide regioselective, reversible couplings that place them into the α-positions of the resulting zirconacyclopentadiene rings. According to density functional theory (DFT) calculations and kinetic studies, the mechanism of this coupling involves a stepwise process, whereby an insertion of the second alkyne influences regiochemistry through both steric and electronic factors. Zirconocene coupling of diynes that incorporate silyl substituents generates predictable macrocyclic products in very high yields. In the absence of significant steric repulsion, the macrocyclization appears to be entropically driven, thereby providing the smallest strain-free macrocyclic structure. The scope of the reaction has been explored by variation of the spacer group between the alkynyl substituents and by incorporation of functional and chiral groups into the macrocycle. The size and shape of the resulting macrocycles are largely determined by the length and geometry of the dialkyne spacer, especially in the case of terminal trimethylsilyl-substituted diynes. For example, linear, rigid diynes with four or fewer phenylene rings lead to trimeric macrocycles, whereas bent or flexible diynes produce dimers. Depending on the reaction conditions, functional groups (such as N-heterocycles and imines) are tolerated in zirconocene coupling reactions, and in selected cases, they can be used to influence the shape of the final macrocyclic product. More recently, Cp(2)Zr(pyr)(Me(3)SiC≡CSiMe(3)) has been employed as a more general zirconocene synthon; it affords higher yields and increased functional group tolerance. Functional groups can also be incorporated through transformation of the zirconacyclopentadiene products, with acid hydrolysis to the corresponding butadiene being the most efficient derivatization. Furthermore, construction of chiral macrocycles has been accomplished by stereoselective macrocyclizations, and triynes have been coupled into three-dimensional cage compounds. We also discuss various design factors, providing a perspective on the utility of zirconocene-mediated couplings in the assembly of macrocyclic and cage compounds.
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Affiliation(s)
- Viktoria H. Gessner
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - John F. Tannaci
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - Adam D. Miller
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
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Miller AD, McBee JL, Tilley TD. Zirconocene-mediated macrocyclizations of diynes containing di-o-methylphenylene spacers. J Org Chem 2009; 74:2880-3. [PMID: 19323577 DOI: 10.1021/jo802715m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The diynes 3,3',5,5'-tetramethyl-4,4'-di(pent-1-ynyl)biphenyl (4) and 3,3'',5,5''-tetramethyl-4,4''-di(hex-1-ynyl)terphenyl (9) undergo coupling with Cp(2)Zr(eta(2)-Me(3)SiC[triple bond]CSiMe(3))(py) to give dimeric macrocycles in moderate yields (16% for 4 and 26% for 9).
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Affiliation(s)
- Adam D Miller
- Department of Chemistry, University of California, Berkeley, California 94720-1460, USA
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14
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Miller AD, Tannaci JF, Johnson SA, Lee H, McBee JL, Tilley TD. Mesityl Alkyne Substituents for Control of Regiochemistry and Reversibility in Zirconocene Couplings: New Synthetic Strategies for Unsymmetrical Zirconacyclopentadienes and Conjugated Polymers. J Am Chem Soc 2009; 131:4917-27. [DOI: 10.1021/ja809896t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adam D. Miller
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - John F. Tannaci
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Samuel A. Johnson
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Hyuk Lee
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Jennifer L. McBee
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
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15
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Miller AD, Johnson SA, Tupper KA, McBee JL, Tilley TD. Unsymmetrical Zirconacyclopentadienes from Isolated Zirconacyclopropenes with 1-Alkynylphosphine Ligands. Organometallics 2009. [DOI: 10.1021/om801040t] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adam D. Miller
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Samuel A. Johnson
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Karl A. Tupper
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Jennifer L. McBee
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
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Zirngast M, Marschner C, Baumgartner J. Group 4 Metallocene Complexes of Tris(trimethylsilyl)silylacetylene and Related Alkynes. Organometallics 2008. [DOI: 10.1021/om800038h] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michaela Zirngast
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 16, A-8010 Graz, Austria
| | - Christoph Marschner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 16, A-8010 Graz, Austria
| | - Judith Baumgartner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 16, A-8010 Graz, Austria
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Miller AD, McBee JL, Tilley TD. Mechanism of Reversible Alkyne Coupling at Zirconocene: Ancillary Ligand Effects. J Am Chem Soc 2008; 130:4992-9. [DOI: 10.1021/ja800025u] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adam D. Miller
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - Jennifer L. McBee
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460
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Ogoshi S, Arai T, Ohashi M, Kurosawa H. Nickeladihydrofuran. Key intermediate for nickel-catalyzed reaction of alkyne and aldehyde. Chem Commun (Camb) 2008:1347-9. [PMID: 18389129 DOI: 10.1039/b717261c] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of a nickeladihydrofuran by oxidative cyclization of an alkyne and an aldehyde with nickel(0) has been demonstrated; the transformation of the nickeladihydrofuran into an enone by decomposition, a lactone by carbonylation and an allylic alcohol by treatment with ZnMe(2) suggests that nickeladihydrofuran is an important key intermediate in a variety of catalytic reactions.
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Affiliation(s)
- Sensuke Ogoshi
- Department of Applied Chemistry, Osaka University, Suita, Osaka, Japan.
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19
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Abstract
The reaction of N-benzenesulfonylbenzaldimine with Ni(cod)2 and PCy3 gave the corresponding η2-iminenickel complex quantitatively. Diphenylacetylene reacted with the η2-iminenickel complex to generate five-membered aza-nickelacycle. Insertion of second alkynes into the five-membered aza-nickelacycle led to the formation of the corresponding seven-membered aza-nickelacycles. Heating the solution of the seven-membered aza-nickelacycles induced the reductive elimination to give 1,2-dihydropyridine. In the presence of 10 mol % of Ni(cod)2 and PMetBu2 at 100 °C, the intermolecular [2+2+2] cycloaddition of N-benzenesulfonylbenzaldimine and 2-butyne occurred to give the expected 1,2-dihydropyridine in 87 % yield. In the presence of PCy3, the reaction also proceeded catalytically, however, PMetBu2 gave better results. Less bulky or less basic phosphine, PnBu3 or P(o-tol)3, was not efficient for the reaction. Although Ni(0)-NHC complex was a good catalyst for [2+2+2] cycloaddition of two alkynes and a ketone or an aldehyde, this reaction did not proceed in the presence of an NHC ligand, 1,3-bis-(2,4,6-trimethylphenyl)imidazol-2-ylidene.
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Investigation in the coupling of zirconocene complexes and trimethylsilyl(diphenylphosphino)acetylene. P–C bond cleavage chemistry from protonolysis reactions. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2003.12.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rosenthal U, Ohff A, Michalik M, Görls H, Burlakov VV, Shur VB. Transformation of the First Zirconocene Alkyne Complex without an Additional Phosphane Ligand into a Dinuclear σ-Alkenyl Complex by Hydrogen Transfer from η5-C5H5to the Alkyne Ligand. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.199311931] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Johnson SA, Liu FQ, Suh MC, Zürcher S, Haufe M, Mao SSH, Tilley TD. Regioselective coupling of pentafluorophenyl substituted alkynes: mechanistic insight into the zirconocene coupling of alkynes and a facile route to conjugated polymers bearing electron-withdrawing pentafluorophenyl substituents. J Am Chem Soc 2003; 125:4199-211. [PMID: 12670242 DOI: 10.1021/ja0209161] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of Cp(2)ZrCl(2) with 2 equiv of BuLi at -78 degrees C, followed by the addition of an unsymmetrical tetra- or pentafluorophenyl substituted alkyne R(1)C[triple bond]CAr(f) (R(1), Ar(f) = (CH(2))(4)Me, p-C(6)F(4)H; Me, p-C(6)F(4)H; Ph, C(6)F(5)), resulted in regioselective couplings of these alkynes to zirconacyclopentadienes in which the Ar(f) substituents preferentially adopt the 3,4-positions (beta beta) of the zirconacyclopentadiene ring. With Cp(2)Zr(py)(Me(3)SiC[triple bond]CSiMe(3)) as the zirconocene reagent, the couplings could be carried out at room temperature; however, at higher temperatures significant quantities of the 2,4-fluoroaryl substituted (alpha beta) isomers were also formed. None of the conditions employed produced the 2,5-fluoroaryl substituted (alpha alpha) isomers. These fluoroaryl-substituted zirconacyclopentadienes were readily converted to butadienes via reactions with acids. The zirconacyclopentadiene Cp(2)ZrC(4)-2,5-Ph(2)-3,4-(C(6)F(5))(2), which resulted from the coupling of PhC[triple bond]C(C(6)F(5)), was converted to the corresponding thiophene by reaction with S(2)Cl(2), and to an arene by reaction with MeO(2)CC[triple bond]CCO(2)Me/CuCl. Mechanistic studies on zirconocene couplings of (p-CF(3)C(6)H(4))C[triple bond]C(p-MeC(6)H(4)) indicate that the observed regioselectivities are determined by an electronic factor that controls the orientation of at least one of the two alkynes as they are coupled. Additionally, these studies suggest an unsymmetrical transition state for the zirconocene coupling of alkynes, and this is supported by DFT calculations. The reaction of [(C(6)F(5))C[triple bond]CCH(2)](2)CH(2) with Cp(2)Zr(py)(Me(3)SiC[triple bond]CSiMe(3)) resulted in a zirconacyclopentadiene in which the pentafluorophenyl substituents have been forced into the 2,5-positions (alpha alpha). Zirconocene coupling of the diyne (C(6)F(5))C[triple bond]C-1,4-C(6)H(4)-C[triple bond]C(C(6)F(5)) provided a route to conjugated polymers bearing electron-withdrawing pentafluorophenyl groups.
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Affiliation(s)
- Samuel A Johnson
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, USA
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Sun H, Burlakov VV, Spannenberg A, Baumann W, Arndt P, Rosenthal U. Reactions of Zirconocene−Alkyne Complexes with Polar Functionalized Olefins. Organometallics 2002. [DOI: 10.1021/om0201415] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongsui Sun
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
| | - Vladimir V. Burlakov
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
| | - Anke Spannenberg
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
| | - Wolfgang Baumann
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
| | - Perdita Arndt
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
| | - Uwe Rosenthal
- Institut für Organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany
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Schafer LL, Nitschke JR, Mao SSH, Liu FQ, Harder G, Haufe M, Tilley TD. Zirconocene-mediated, high-yielding macrocyclizations of silyl-terminated diynes. Chemistry 2002; 8:74-83. [PMID: 11826866 DOI: 10.1002/1521-3765(20020104)8:1<74::aid-chem74>3.0.co;2-p] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A series of silyl-terminated diynes of varying lengths and substitution patterns have been prepared. These diynes undergo zirconocene coupling with selective formation of trimeric macrocycles from linear alkynes, while nonlinear diynes give cyclodimeric products. The length of the linear diynes can be increased for the preparation of macrocycles with large nanoscale cavities. Reaction of the zirconium-containing macrocycles with acid results in the synthesis of metal-free cyclophanes. All of these macrocycles were prepared in multigram quantities, in the absence of high-dilution conditions, to give products in > 75% yield that are easily purified as crystalline solids.
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Affiliation(s)
- Laurel L Schafer
- Center for New Directions in Organic Synthesis, Department of Chemistry, University of California, and Lawrence Berkeley National Laboratory, Berkeley 94720, USA
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Nakamoto M, Tilley TD. Reactions of Zirconacyclopentadienes with Nitrosobenzene. Characterization of Zirconacycle Intermediates and Formation of N-Phenylpyrroles. Organometallics 2001. [DOI: 10.1021/om010873h] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masaaki Nakamoto
- Center for New Directions in Organic Synthesis, Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460
| | - T. Don Tilley
- Center for New Directions in Organic Synthesis, Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460
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Sava X, Mézailles N, Maigrot N, Nief F, Ricard L, Mathey F, Le Floch P. A Versatile Approach toward Phosphinine−Phosphole-Based and Phosphinine−Phosphaferrocene-Based Tridentate Ligands. Organometallics 1999. [DOI: 10.1021/om990478f] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xavier Sava
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Nicolas Mézailles
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Nicole Maigrot
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - François Nief
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Louis Ricard
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - François Mathey
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Pascal Le Floch
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Mézailles N, Avarvari N, Bourissou D, Mathey F, Le Floch P. Metallacycle Transfer Reaction from Titanacyclopropenes: A New and Versatile Approach to Phosphirenes. Organometallics 1998. [DOI: 10.1021/om980244g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicolas Mézailles
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Narcis Avarvari
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Didier Bourissou
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - François Mathey
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Pascal Le Floch
- Laboratoire “Hétéroéléments et Coordination”, UMR CNRS 7653, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Preparation of trimethylsilyl alkyne complexes of bis(pentamethylcyclopentadienyl)zirconium, (η5-C5Me5)2Zr(RC≡CSiMe3), and their regioselective reactions with nitrous oxide. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)05995-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Mao SSH, Liu FQ, Tilley TD. Efficient Zirconocene-Coupling of Silicon-Substituted Diynes to Polymers and Macrocycles. J Am Chem Soc 1998. [DOI: 10.1021/ja973180u] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shane S. H. Mao
- Contribution from the Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460
| | - Feng-Quan Liu
- Contribution from the Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460
| | - T. Don Tilley
- Contribution from the Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-1460
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31
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Pyridine-based mono(ligand)nickel(0) complexes of 1,6-heptadiene, 1-phenyl-2-trimethylsilyl-acetylene, and 1,4-bis(trimethylsilyl)-1,3-butadiyne. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10224-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Field LD, George AV, Hambley TW, Turner P, Wallace BJ. Metallocycle synthesis accelerated by high pressure. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00026-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Mansel S, Thomas D, Lefeber C, Heller D, Kempe R, Baumann W, Rosenthal U. Stable rac-[1,2-Ethylene-1,1‘-bis(η5-tetrahydroindenyl)]- zirconacyclopentanes. Syntheses, X-ray Crystal Structures, Stability, and Catalysis of Ethylene Polymerization. Organometallics 1997. [DOI: 10.1021/om9700324] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Mansel
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Dominique Thomas
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Claudia Lefeber
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Detlef Heller
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Rhett Kempe
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Wolfgang Baumann
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
| | - Uwe Rosenthal
- Abteilung “Komplexkatalyse”, Institut für organische Katalyseforschung an der Universität Rostock e.V., Buchbinderstrasse 5-6, D-18055 Rostock, Germany
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Terminal chalcogenido complexes of zirconium: Syntheses and reactivity of Cp2*Zr(E)(NC5H5) (E = O, S, Se, Te). J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(96)06584-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Hiller J, Thewalt U, Polášek M, Petrusová L, Varga V, Sedmera P, Mach K. Methyl-Substituted Zirconocene−Bis(trimethylsilyl)acetylene Complexes (C5H5-nMen)2Zr(η2-Me3SiC⋮CSiMe3) (n = 2−5). Organometallics 1996. [DOI: 10.1021/om960184j] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jörg Hiller
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Ulf Thewalt
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Miroslav Polášek
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Lidmila Petrusová
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Vojtech Varga
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Petr Sedmera
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
| | - Karel Mach
- Sektion für Röntgen- und Elektronenbeugung, Universität Ulm, 89069 Ulm, Germany, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, The Czech Republic, and Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague 4, The Czech Republic
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Ohff A, Kempe R, Baumann W, Rosenthal U. Reaktion eines titanocen—Alkin-Komplexes mit trialkylammoniumtetraphenylborat—eine neue darstellungsweise und erste kristallstrukturanalyse von neutralligandhaltigen kationischen titanocen(III-komplexen [{Cp2Ti(L)2+}{BPh4−}]1. J Organomet Chem 1996. [DOI: 10.1016/0022-328x(96)06308-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Baumann W, Ohff A, Ebener M. Ring-Opening Reaction of a Dihydrozirconafuran (= 2,5-Dihydro-1,2-oxazirconole): An equilibrium studied by NMR methods, and its chemical consequences. Helv Chim Acta 1996. [DOI: 10.1002/hlca.19960790213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Lefeber C, Ohff A, Tillack A, Baumann W, Kempe R, Burlakov V, Rosenthal U. Darstellung und regioselektive reaktionen des phosphinfreien zirconocen-alkin-komplexes Cp2Zr(THF)(tBuC2SiMe3). J Organomet Chem 1995. [DOI: 10.1016/0022-328x(95)05648-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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39
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Dzhemilev U. New achievements in the use of zirconium complexes in the chemistry of organo-aluminium and magnesium compounds. Tetrahedron 1995. [DOI: 10.1016/0040-4020(94)01123-h] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Suzuki N, Kondakov DY, Kageyama M, Kotora M, Hara R, Takahashi T. Novel type of carbozirconation reaction of alkynes. Tetrahedron 1995. [DOI: 10.1016/0040-4020(94)01138-p] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Temme B, Erker G, Fröhlich R, Grehl M. Heterodimetall-Betain-Chemie: katalytische und stöchiometrische Kupplungen von Alkinyl-Liganden unter dem gemeinsamen Einfluß von Zirconium- und Borzentren. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061428] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rosenthal U, Ohff A, Baumann W, Kempe R, Tillack A, Burlakov VV. Ungewöhnliche Reaktionen von Acetylendicarbonsäurediestern an Zirconocenkomplexen. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061821] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rosenthal U, Ohff A, Michalik M, Görls H, Burlakov VV, Shur VB. Umwandlung des ersten Zirconocen-Alkin-Komplexes ohne zusätzlichen Phosphan-Liganden in einen zweikernigen σ-Alkenyl-Komplex durch Wasserstoffübertragung vom η5-C5H5- zum Alkin-Liganden. Angew Chem Int Ed Engl 1993. [DOI: 10.1002/ange.19931050824] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Cuenca T, Gómez R, Goḿez-Sal P, Royo P. Synthesis and characterization of ansa-dimethylsilylbiscyclopentadienyl titanium(II) complexes. Crystal structure of [Ti{Me2Si(C5H4)2}{CN(2,6-Me2C6H3)}2]. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)83230-s] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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47
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Erker G, Pfaff R, Krüger C, Nolte M, Goddard R. Nitrile Addition to (η4-Butadiene)zirconocene: The Formation of Organometallic and Metal-Free Hexatrienediamine Derivatives. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/cber.19921250724] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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