251
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Keitz BK, Grubbs RH. Probing the origin of degenerate metathesis selectivity via characterization and dynamics of ruthenacyclobutanes containing variable NHCs. J Am Chem Soc 2011; 133:16277-84. [PMID: 21919449 DOI: 10.1021/ja207252r] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The preparation of new phosphonium alkylidene ruthenium metathesis catalysts containing N-heterocyclic carbenes (NHCs) that result in a preference for degenerate metathesis is described. The reaction of the catalysts with ethylene or substrates relevant to ring-closing metathesis (RCM) produced ruthenacyclobutanes that could be characterized by cryogenic NMR spectroscopy. The rate of α/β methylene exchange in ethylene-only ruthenacycles was found to vary widely between ruthenacycles, in some cases being as low as 3.97 s(-1) at -30 °C, suggesting that the NHC plays an important role in degenerative metathesis reactions. Attempts to generate RCM-relevant ruthenacycles resulted in the low-yielding formation of a previously unobserved species, which we assign to be a β-alkyl-substituted ruthenacycle. Kinetic investigations of the RCM-relevant ruthenacycles in the presence of excess ethylene revealed a large increase in the kinetic barrier of the rate-limiting dissociation of the cyclopentene RCM product compared with previously investigated catalysts. Taken together, these results shed light on the degenerate/productive selectivity differences observed for different metathesis catalysts.
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Affiliation(s)
- Benjamin K Keitz
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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252
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Boddaert T, Coquerel Y, Rodriguez J. Combination of Rearrangement with Metallic and Organic Catalyses - a Step- and Atom-Economical Approach to α-Spiroactones and -lactams. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100734] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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253
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Inci B, Wagener KB. Decreasing the alkyl branch frequency in precision polyethylene: pushing the limits toward longer run lengths. J Am Chem Soc 2011; 133:11872-5. [PMID: 21766883 DOI: 10.1021/ja2040046] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A symmetrical α,ω-diene monomer with a 36 methylene run length was synthesized and polymerized, and the unsaturated polymer was hydrogenated to generate precision polyethylene possessing a butyl branch on every 75th carbon (74 methylenes between branch points). The precision polymer sharply melts at 104 °C and exhibits the typical orthorhombic unit cell structure with two characteristic wide-angle X-ray diffraction (WAXD) crystalline peaks observed at 21.5° and 24.0°, corresponding to reflection planes (110) and (200), respectively.
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Affiliation(s)
- Bora Inci
- Center for Macromolecular Science and Engineering, The George and Josephine Butler Polymer Research Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA
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254
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Bieniek M, Samojłowicz C, Sashuk V, Bujok R, Śledź P, Lugan N, Lavigne G, Arlt D, Grela K. Rational Design and Evaluation of Upgraded Grubbs/Hoveyda Olefin Metathesis Catalysts: Polyfunctional Benzylidene Ethers on the Test Bench. Organometallics 2011. [DOI: 10.1021/om200463u] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Michał Bieniek
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Cezary Samojłowicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Volodymyr Sashuk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Robert Bujok
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Paweł Śledź
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Noël Lugan
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Guy Lavigne
- Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Dieter Arlt
- University of Cologne, Albertus-Magnus-Platz, 50923 Köln, Germany
| | - Karol Grela
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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255
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Keitz BK, Endo K, Herbert MB, Grubbs RH. Z-selective homodimerization of terminal olefins with a ruthenium metathesis catalyst. J Am Chem Soc 2011; 133:9686-8. [PMID: 21649443 PMCID: PMC3138429 DOI: 10.1021/ja203488e] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The cross-metathesis of terminal olefins using a novel ruthenium catalyst results in excellent selectivity for the Z-olefin homodimer. The reaction was found to tolerate a large number of functional groups, solvents, and temperatures while maintaining excellent Z-selectivity, even at high reaction conversions.
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Affiliation(s)
- Benjamin K. Keitz
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, 91125
| | - Koji Endo
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, 91125
| | - Myles B. Herbert
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, 91125
| | - Robert H. Grubbs
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California, 91125
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256
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Bek D, Balcar H, Žilková N, Zukal A, Horáček M, Čejka J. Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers. ACS Catal 2011. [DOI: 10.1021/cs200090e] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Bek
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Hynek Balcar
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Naděžda Žilková
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Arnošt Zukal
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Michal Horáček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
| | - Jiří Čejka
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic
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257
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Wenzel AG, Blake G, VanderVelde DG, Grubbs RH. Characterization and dynamics of substituted ruthenacyclobutanes relevant to the olefin cross-metathesis reaction. J Am Chem Soc 2011; 133:6429-39. [PMID: 21452876 PMCID: PMC3083245 DOI: 10.1021/ja2009746] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of the phosphonium alkylidene [(H(2)IMes)RuCl(2)=CHP(Cy)(3))](+) BF(4)(-) with propene, 1-butene, and 1-hexene at -45 °C affords various substituted, metathesis-active ruthenacycles. These metallacycles were found to equilibrate over extended reaction times in response to decreases in ethylene concentrations, which favored increased populations of α-monosubstituted and α,α'-disubstituted (both cis and trans) ruthenacycles. On an NMR time scale, rapid chemical exchange was found to preferentially occur between the β-hydrogens of the cis and trans stereoisomers prior to olefin exchange. Exchange on an NMR time scale was also observed between the α- and β-methylene groups of the monosubstituted ruthenacycle (H(2)IMes)Cl(2)Ru(CHRCH(2)CH(2)) (R = CH(3), CH(2)CH(3), (CH(2))(3)CH(3)). EXSY NMR experiments at -87 °C were used to determine the activation energies for both of these exchange processes. In addition, new methods have been developed for the direct preparation of metathesis-active ruthenacyclobutanes via the protonolysis of dichloro(1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)(benzylidene) bis(pyridine)ruthenium(II) and its 3-bromopyridine analogue. Using either trifluoroacetic acid or silica-bound toluenesulfonic acid as the proton source, the ethylene-derived ruthenacyclobutane (H(2)IMes)Cl(2)Ru(CH(2)CH(2)CH(2)) was observed in up to 98% yield via NMR at -40 °C. On the basis of these studies, mechanisms accounting for the positional and stereochemical exchange within ruthenacyclobutanes are proposed, as well as the implications of these dynamics toward olefin metathesis catalyst and reaction design are described.
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Affiliation(s)
- Anna G Wenzel
- Joint Science Department, Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, USA.
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258
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Thomas RM, Keitz BK, Champagne TM, Grubbs RH. Highly selective ruthenium metathesis catalysts for ethenolysis. J Am Chem Soc 2011; 133:7490-6. [PMID: 21510645 DOI: 10.1021/ja200246e] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
N-Aryl,N-alkyl N-heterocyclic carbene (NHC) ruthenium metathesis catalysts are highly selective toward the ethenolysis of methyl oleate, giving selectivity as high as 95% for the kinetic ethenolysis products over the thermodynamic self-metathesis products. The examples described herein represent some of the most selective NHC-based ruthenium catalysts for ethenolysis reactions to date. Furthermore, many of these catalysts show unusual preference and stability toward propagation as a methylidene species and provide good yields and turnover numbers at relatively low catalyst loading (<500 ppm). A catalyst comparison showed that ruthenium complexes bearing sterically hindered NHC substituents afforded greater selectivity and stability and exhibited longer catalyst lifetime during reactions. Comparative analysis of the catalyst preference for kinetic versus thermodynamic product formation was achieved via evaluation of their steady-state conversion in the cross-metathesis reaction of terminal olefins. These results coincided with the observed ethenolysis selectivities, in which the more selective catalysts reach a steady state characterized by lower conversion to cross-metathesis products compared to less selective catalysts, which show higher conversion to cross-metathesis products.
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Affiliation(s)
- Renee M Thomas
- The Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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259
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Fürstner A. From Total Synthesis to Diverted Total Synthesis: Case Studies in the Amphidinolide Series. Isr J Chem 2011. [DOI: 10.1002/ijch.201100006] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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260
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De Bo G, Markó IE. Studies towards the Synthesis of Pentalenene: Mechanistic Insights into the Isomerization Phenomenon During RCM of Medium-Sized Rings. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001475] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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261
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Kwon SH, Lee HJ, Cho CW. Concise Asymmetric Formal Synthesis of Pyrrolopiperazinone Natural Products by Tandem Cross Metathesis/Intramolecular Aza-Conjugate Addition. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.1.315] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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262
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Kafle B, Bhattarai BR, Cho HJ. Barbituric Acid Derivatives as Protein Tyrosine Phosphatase Inhibitors. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.1.31] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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263
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Winbush SM, Roush WR. Enantioselective synthesis of (Z)-1,2-anti-2,5-anti-triol monosilyl ethers using a cross-metathesis allylboration sequence. Org Lett 2011; 12:4344-7. [PMID: 20806914 DOI: 10.1021/ol101789g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The enantioselective synthesis of (Z)-1,2-anti-2,5-anti-triol monosilyl ethers via a two-step sequence involving olefin cross-metathesis of β-alkoxyallylboronate 4 and subsequent allylboration of the derived bisboryl intermediate 6 provides triol monoethers 7 with good to excellent diastereoselectivity.
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Affiliation(s)
- SusAnn M Winbush
- Department of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458, USA
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264
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Ballester P, Vidal-Ferran A, van Leeuwen PW. Modern Strategies in Supramolecular Catalysis. ADVANCES IN CATALYSIS 2011. [DOI: 10.1016/b978-0-12-387772-7.00002-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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265
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Poater A, Ragone F, Garrido M, Pérez S, Poch M, Correa A, Cavallo L. Deactivation of Ru-benzylidene Grubbs catalysts active in olefin metathesis. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.procs.2011.04.131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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266
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Fujihara T, Tomike Y, Ohtake T, Terao J, Tsuji Y. Ruthenium-catalyzed ring-closing metathesis accelerated by long-range steric effect. Chem Commun (Camb) 2011; 47:9699-701. [DOI: 10.1039/c1cc13304g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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267
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Poater A, Bahri-Laleh N, Cavallo L. Rationalizing current strategies to protect N-heterocyclic carbene-based ruthenium catalysts active in olefin metathesis from C–H (de)activation. Chem Commun (Camb) 2011; 47:6674-6. [DOI: 10.1039/c1cc11594d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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268
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Häller LJL, Page MJ, Erhardt S, Macgregor SA, Mahon MF, Naser MA, Vélez A, Whittlesey MK. Experimental and Computational Investigation of C−N Bond Activation in Ruthenium N-Heterocyclic Carbene Complexes. J Am Chem Soc 2010; 132:18408-16. [DOI: 10.1021/ja109702h] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. Jonas L. Häller
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Michael J. Page
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Stefan Erhardt
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Stuart A. Macgregor
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Mary F. Mahon
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - M. Abu Naser
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Andrea Vélez
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Michael K. Whittlesey
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, and Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
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269
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Yang H, Ma Z, Wang Y, Wang Y, Fang L. Hoveyda-Grubbs catalyst confined in the nanocages of SBA-1: enhanced recyclability for olefin metathesis. Chem Commun (Camb) 2010; 46:8659-61. [PMID: 20957237 DOI: 10.1039/c0cc03227a] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Via a simple adsorption, the second generation Hoveyda-Grubbs catalyst was successfully immobilized on a mesoporous material SBA-1, leading to a highly recyclable solid catalyst for olefin metathesis.
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Affiliation(s)
- Hengquan Yang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, P.R. China.
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270
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Vorfalt T, Wannowius KJ, Thiel V, Plenio H. How Important Is the Release–Return Mechanism in Olefin Metathesis? Chemistry 2010; 16:12312-5. [DOI: 10.1002/chem.201001832] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tim Vorfalt
- Organometallic Chemistry, TU Darmstadt, Petersenstrasse 18, 64287 Darmstadt (Germany)
| | - Klaus J. Wannowius
- Organometallic Chemistry, TU Darmstadt, Petersenstrasse 18, 64287 Darmstadt (Germany)
| | - Vasco Thiel
- Organometallic Chemistry, TU Darmstadt, Petersenstrasse 18, 64287 Darmstadt (Germany)
| | - Herbert Plenio
- Organometallic Chemistry, TU Darmstadt, Petersenstrasse 18, 64287 Darmstadt (Germany)
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271
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Dallinger D, Irfan M, Suljanovic A, Kappe CO. An Investigation of Wall Effects in Microwave-Assisted Ring-Closing Metathesis and Cyclotrimerization Reactions. J Org Chem 2010; 75:5278-88. [DOI: 10.1021/jo1011703] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Doris Dallinger
- Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Muhammed Irfan
- Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Amra Suljanovic
- Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - C. Oliver Kappe
- Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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272
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Vorfalt T, Wannowius KJ, Plenio H. Probing the Mechanism of Olefin Metathesis in Grubbs-Hoveyda and Grela Type Complexes. Angew Chem Int Ed Engl 2010; 49:5533-6. [DOI: 10.1002/anie.201000581] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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273
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Vorfalt T, Wannowius KJ, Plenio H. Probing the Mechanism of Olefin Metathesis in Grubbs-Hoveyda and Grela Type Complexes. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000581] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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274
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Ghosh SC, Hong SH. Simple RuCl3-Catalyzed Amide Synthesis from Alcohols and Amines. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000362] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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275
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van der Eide EF, Piers WE. Mechanistic insights into the ruthenium-catalysed diene ring-closing metathesis reaction. Nat Chem 2010; 2:571-6. [DOI: 10.1038/nchem.653] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Accepted: 03/25/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Edwin F van der Eide
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4 Canada
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276
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Vougioukalakis GC, Grubbs RH. Ruthenium-based heterocyclic carbene-coordinated olefin metathesis catalysts. Chem Rev 2010; 110:1746-87. [PMID: 20000700 DOI: 10.1021/cr9002424] [Citation(s) in RCA: 1579] [Impact Index Per Article: 112.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Georgios C Vougioukalakis
- Institute of Physical Chemistry, National Centre of Scientific Research Demokritos, 15310 Agia Paraskevi, Greece
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277
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278
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Fuwa H, Noto K, Sasaki M. Stereoselective Synthesis of Substituted Tetrahydropyrans via Domino Olefin Cross-Metathesis/Intramolecular Oxa-Conjugate Cyclization. Org Lett 2010; 12:1636-9. [DOI: 10.1021/ol100431m] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haruhiko Fuwa
- Laboratory of Biostructural Chemistry, Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Kenkichi Noto
- Laboratory of Biostructural Chemistry, Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Makoto Sasaki
- Laboratory of Biostructural Chemistry, Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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279
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Sashuk V, Peeck L, Plenio H. [(NHC)(NHCewg)RuCl2(CHPh)] Complexes with Modified NHCewg Ligands for Efficient Ring-Closing Metathesis Leading to Tetrasubstituted Olefins. Chemistry 2010; 16:3983-93. [DOI: 10.1002/chem.200903275] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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280
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Leitao EM, van der Eide EF, Romero PE, Piers WE, McDonald R. Kinetic and Thermodynamic Analysis of Processes Relevant to Initiation of Olefin Metathesis by Ruthenium Phosphonium Alkylidene Catalysts. J Am Chem Soc 2010; 132:2784-94. [DOI: 10.1021/ja910112m] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Erin M. Leitao
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4, and Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Edwin F. van der Eide
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4, and Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Patricio E. Romero
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4, and Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Warren, E. Piers
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4, and Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Robert McDonald
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4, and Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
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281
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Clavier H, Nolan SP. Percent buried volume for phosphine and N-heterocyclic carbene ligands: steric properties in organometallic chemistry. Chem Commun (Camb) 2010; 46:841-61. [DOI: 10.1039/b922984a] [Citation(s) in RCA: 760] [Impact Index Per Article: 54.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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282
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Ruthenium Olefin Metathesis Catalysts Bearing Carbohydrate-Based N-Heterocyclic Carbenes. Organometallics 2009; 29:403-408. [DOI: 10.1021/om900864r] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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283
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Lim J, Seong Lee S, Ying JY. Mesoporous silica-supported catalysts for metathesis: application to a circulating flow reactor. Chem Commun (Camb) 2009; 46:806-8. [PMID: 20087527 DOI: 10.1039/b917986k] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using click chemistry for linkage, a ruthenium-based metathesis catalyst was efficiently immobilized on nanoporous silica. The heterogenized catalyst exhibited good activity and recyclability for various substrates. An interesting application was demonstrated for a continuous process using a circulating flow reactor.
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Affiliation(s)
- Jaehong Lim
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, 138669, The Nanos, Singapore
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284
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Ashworth IW, Miles JA, Nelson DJ, Percy JM, Singh K. Trisubstituted cyclooctene synthesis at the limits of relay ring-closing metathesis: a racemic difluorinated analogue of fucose. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.08.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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285
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Pentzer EB, Gadzikwa T, Nguyen ST. Substrate encapsulation: an efficient strategy for the RCM synthesis of unsaturated epsilon-lactones. Org Lett 2009; 10:5613-5. [PMID: 19053741 DOI: 10.1021/ol8022227] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile substrate-encapsulated RCM-based synthesis of 7-membered lactones is reported. Coordination of the alpha,omega-dienyl ester precursor to the bulky Lewis acid (LA) aluminum tris(2,6-diphenylphenoxide) (ATPH) provides a protective extended steric pocket to the olefin moieties, thereby favoring intramolecular RCM over intermolecular ADMET oligomerization. The LA-encapsulated esters undergo ring-closure in the presence of Ru-based olefin metathesis catalysts to give previously difficult-to-access 7-membered beta,gamma- and gamma,delta-unsaturated lactones in good yields.
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Affiliation(s)
- Emily B Pentzer
- Department of Chemistry and International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
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286
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Grisi F, Mariconda A, Costabile C, Bertolasi V, Longo P. Influence of syn and anti Configurations of NHC Backbone on Ru-Catalyzed Olefin Metathesis. Organometallics 2009. [DOI: 10.1021/om900497q] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fabia Grisi
- Dipartimento di Chimica, Universitá di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Salerno, Italy
| | - Annaluisa Mariconda
- Dipartimento di Chimica, Universitá di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Salerno, Italy
| | - Chiara Costabile
- Dipartimento di Chimica, Universitá di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Salerno, Italy
| | - Valerio Bertolasi
- Dipartimento di Chimica and Centro di Strutturistica Diffrattometrica, Università di Ferrara, Via L. Borsari 46, I-44100 Ferrara, Italy
| | - Pasquale Longo
- Dipartimento di Chimica, Universitá di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Salerno, Italy
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287
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Wilson G, Porter K, Weissman H, White S, Sottos N, Moore J. Stability of Second Generation Grubbs’ Alkylidenes to Primary Amines: Formation of Novel Ruthenium-Amine Complexes. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900134] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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288
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Diesendruck CE, Vidavsky Y, Ben-Asuly A, Lemcoff NG. A latent s-chelated ruthenium benzylidene initiator for ring-opening metathesis polymerization. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23476] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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289
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Vieille-Petit L, Luan X, Gatti M, Blumentritt S, Linden A, Clavier H, Nolan SP, Dorta R. Improving Grubbs' II type ruthenium catalysts by appropriately modifying the N-heterocyclic carbene ligand. Chem Commun (Camb) 2009:3783-5. [PMID: 19557281 DOI: 10.1039/b904634h] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The introduction of N-heterocyclic carbene ligands that incorporate correctly substituted naphthyl side chains leads to increased activity and stability in second generation ruthenium metathesis catalysts.
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Affiliation(s)
- Ludovic Vieille-Petit
- Organic Chemistry Institute, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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290
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Vorfalt T, Leuthäußer S, Plenio H. An [(NHC)(NHCEWG)RuCl2(CHPh)] Complex for the Efficient Formation of Sterically Hindered Olefins by Ring-Closing Metathesis. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900935] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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291
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Vorfalt T, Leuthäußer S, Plenio H. An [(NHC)(NHCEWG)RuCl2(CHPh)] Complex for the Efficient Formation of Sterically Hindered Olefins by Ring-Closing Metathesis. Angew Chem Int Ed Engl 2009; 48:5191-4. [DOI: 10.1002/anie.200900935] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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292
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Affiliation(s)
- Sebastien Monfette
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
| | - Deryn E. Fogg
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N 6N5, Canada
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293
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Poater A, Ragone F, Correa A, Cavallo L. Exploring the Reactivity of Ru-Based Metathesis Catalysts with a π-Acid Ligand Trans to the Ru−Ylidene Bond. J Am Chem Soc 2009; 131:9000-6. [DOI: 10.1021/ja902552m] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Albert Poater
- MoLNaC - Modeling Lab for Nanostructures and Catalysis, Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (SA), Italy
| | - Francesco Ragone
- MoLNaC - Modeling Lab for Nanostructures and Catalysis, Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (SA), Italy
| | - Andrea Correa
- MoLNaC - Modeling Lab for Nanostructures and Catalysis, Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (SA), Italy
| | - Luigi Cavallo
- MoLNaC - Modeling Lab for Nanostructures and Catalysis, Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano (SA), Italy
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294
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the Year 2007. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2008.12.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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295
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Galan BR, Pitak M, Gembicky M, Keister JB, Diver ST. Ligand-Promoted Carbene Insertion into the Aryl Substituent of an N-Heterocyclic Carbene Ligand in Ruthenium-Based Metathesis Catalysts. J Am Chem Soc 2009; 131:6822-32. [DOI: 10.1021/ja809984k] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brandon R. Galan
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260-3000
| | - Mateusz Pitak
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260-3000
| | - Milan Gembicky
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260-3000
| | - Jerome B. Keister
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260-3000
| | - Steven T. Diver
- Department of Chemistry, University at Buffalo, the State University of New York, Buffalo, New York 14260-3000
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296
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Macnaughtan ML, Gary JB, Gerlach DL, Johnson MJA, Kampf JW. Cross-Metathesis of Vinyl Halides. Scope and Limitations of Ruthenium-Based Catalysts. Organometallics 2009. [DOI: 10.1021/om800463n] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marisa L. Macnaughtan
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055
| | - J. Brannon Gary
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055
| | - Deidra L. Gerlach
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055
| | - Marc J. A. Johnson
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055
| | - Jeff W. Kampf
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055
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297
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Kuhn KM, Bourg JB, Chung CK, Virgil SC, Grubbs RH. Effects of NHC-backbone substitution on efficiency in ruthenium-based olefin metathesis. J Am Chem Soc 2009; 131:5313-20. [PMID: 19351207 PMCID: PMC2679506 DOI: 10.1021/ja900067c] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of ruthenium olefin metathesis catalysts bearing N-heterocyclic carbene (NHC) ligands with varying degrees of backbone and N-aryl substitution have been prepared. These complexes show greater resistance to decomposition through C-H activation of the N-aryl group, resulting in increased catalyst lifetimes. This work has utilized robotic technology to examine the activity and stability of each catalyst in metathesis, providing insights into the relationship between ligand architecture and enhanced efficiency. The development of this robotic methodology has also shown that, under optimized conditions, catalyst loadings as low as 25 ppm can lead to 100% conversion in the ring-closing metathesis of diethyl diallylmalonate.
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Affiliation(s)
- Kevin M. Kuhn
- Contribution from the Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Jean-Baptiste Bourg
- Contribution from the Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Cheol K. Chung
- Contribution from the Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | | | - Robert H. Grubbs
- Contribution from the Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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298
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Allen DP, Van Wingerden MM, Grubbs RH. Well-Defined Silica-Supported Olefin Metathesis Catalysts. Org Lett 2009; 11:1261-4. [DOI: 10.1021/ol9000153] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daryl P. Allen
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Matthew M. Van Wingerden
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Robert H. Grubbs
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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299
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Zhang X, Xia Q, Chen W. Synthesis of tetra- and pentacoordinate palladium complexes of functionalized N-heterocyclic carbenes and a comparative study of their catalytic activities. Dalton Trans 2009:7045-54. [DOI: 10.1039/b903285a] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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300
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Leitao E, Dubberley S, Piers W, Wu Q, McDonald R. Thermal Decomposition Modes for Four-Coordinate Ruthenium Phosphonium Alkylidene Olefin Metathesis Catalysts. Chemistry 2008; 14:11565-72. [DOI: 10.1002/chem.200801584] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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