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Kinugawa T, Matsuo T. Reactivity regulation for olefin metathesis-catalyzing ruthenium complexes with sulfur atoms at the terminal of 2-alkoxybenzylidene ligands. Dalton Trans 2023. [PMID: 37368438 DOI: 10.1039/d3dt01471a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
For regulating the olefin metathesis (OM) activity of the Hoveyda-Grubbs second-generation complex (HG-II), the structural modification of the benzylidene ligand is a useful strategy. This paper reports the effect of a chalcogen atom placed at the end of the benzylidene group on the catalytic properties of HG-II derivatives, using complexes with a thioether or ether component in the benzylidene ligand (ortho-Me-E-(CH2)2O-styrene; E = S, O). Nuclear magnetic resonance and X-ray crystallographic analyses of the complex with a thioether moiety (E = S) proved the (O,S)-bidentate and trans-dichlorido coordination for the complex. A stoichiometric ligand exchange between HG-II and the benzylidene ligand (E = S) produced the corresponding complex with an 86% yield, confirming higher stability of the complex (E = S) than that of HG-II. Despite the bidentate chelation, the complex (E = S) exhibited OM catalytic activity, indicating the exchangeability of the S-chelating ligand with an olefinic substrate. The green solution color, a characteristic of HG-II derivatives, was retained after the complex (E = S)-mediated OM reactions, indicating high catalyst durability. Conversely, the complex (E = O) rapidly initiated OM reactions; however, it showed low catalyst durability. In the OM reactions conducted in the presence of methanol, the complex (E = S) exhibited higher yields than the complex (E = O) and HG-II: the S-coordination increased the catalyst tolerance to methanol. A coordinative atom (such as sulfur) placed at the terminal of the benzylidene ligand can precisely regulate the reactivity of HG-II derivatives.
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Affiliation(s)
- Tsubasa Kinugawa
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.
| | - Takashi Matsuo
- Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.
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Functionalization of Ruthenium Olefin-Metathesis Catalysts for Interdisciplinary Studies in Chemistry and Biology. Catalysts 2021. [DOI: 10.3390/catal11030359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hoveyda–Grubbs-type complexes, ruthenium catalysts for olefin metathesis, have gained increased interest as a research target in the interdisciplinary research fields of chemistry and biology because of their high functional group selectivity in olefin metathesis reactions and stabilities in aqueous media. This review article introduces the application of designed Hoveyda–Grubbs-type complexes for bio-relevant studies including the construction of hybrid olefin metathesis biocatalysts and the development of in-vivo olefin metathesis reactions. As a noticeable issue in the employment of Hoveyda–Grubbs-type complexes in aqueous media, the influence of water on the catalytic activities of the complexes and strategies to overcome the problems resulting from the water effects are also discussed. In connection to the structural effects of protein structures on the reactivities of Hoveyda–Grubbs-type complexes included in the protein, the regulation of metathesis activities through second-coordination sphere effect is presented, demonstrating that the reactivities of Hoveyda–Grubbs-type complexes are controllable by the structural modification of the complexes at outer-sphere parts. Finally, as a new-type reaction based on the ruthenium-olefin specific interaction, a recent finding on the ruthenium complex transfer reaction between Hoveyda–Grubbs-type complexes and biomolecules is introduced.
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Foster JC, Grocott MC, Arkinstall LA, Varlas S, Redding MJ, Grayson SM, O’Reilly RK. It is Better with Salt: Aqueous Ring-Opening Metathesis Polymerization at Neutral pH. J Am Chem Soc 2020; 142:13878-13885. [PMID: 32673484 PMCID: PMC7426906 DOI: 10.1021/jacs.0c05499] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Indexed: 12/15/2022]
Abstract
Aqueous ring-opening metathesis polymerization (ROMP) is a powerful tool for polymer synthesis under environmentally friendly conditions, functionalization of biomacromolecules, and preparation of polymeric nanoparticles via ROMP-induced self-assembly (ROMPISA). Although new water-soluble Ru-based metathesis catalysts have been developed and evaluated for their efficiency in mediating cross metathesis (CM) and ring-closing metathesis (RCM) reactions, little is known with regards to their catalytic activity and stability during aqueous ROMP. Here, we investigate the influence of solution pH, the presence of salt additives, and catalyst loading on ROMP monomer conversion and catalyst lifetime. We find that ROMP in aqueous media is particularly sensitive to chloride ion concentration and propose that this sensitivity originates from chloride ligand displacement by hydroxide or H2O at the Ru center, which reversibly generates an unstable and metathesis inactive complex. The formation of this Ru-(OH)n complex not only reduces monomer conversion and catalyst lifetime but also influences polymer microstructure. However, we find that the addition of chloride salts dramatically improves ROMP conversion and control. By carrying out aqueous ROMP in the presence of various chloride sources such as NaCl, KCl, or tetrabutylammonium chloride, we show that diblock copolymers can be readily synthesized via ROMPISA in solutions with high concentrations of neutral H2O (i.e., 90 v/v%) and relatively low concentrations of catalyst (i.e., 1 mol %). The capability to conduct aqueous ROMP at neutral pH is anticipated to enable new research avenues, particularly for applications in biological media, where the unique characteristics of ROMP provide distinct advantages over other polymerization strategies.
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Affiliation(s)
- Jeffrey C. Foster
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United
Kingdom
| | - Marcus C. Grocott
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United
Kingdom
| | - Lucy A. Arkinstall
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United
Kingdom
| | - Spyridon Varlas
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United
Kingdom
| | - McKenna J. Redding
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Scott M. Grayson
- Department
of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Rachel K. O’Reilly
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, United
Kingdom
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Church DC, Takiguchi L, Pokorski JK. Optimization of Ring-Opening Metathesis Polymerization (ROMP) under Physiologically Relevant Conditions. Polym Chem 2020; 11:4492-4499. [PMID: 33796158 PMCID: PMC8009303 DOI: 10.1039/d0py00716a] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ring opening metathesis polymerization (ROMP) is widely considered an excellent living polymerization technique that proceeds rapidly under ambient conditions and is highly functional group tolerant when performed in organic solvents. However, achieving the same level of success in aqueous media has proved to be challenging, often requiring an organic co-solvent or a very low pH to obtain fast initiation and high monomer conversion. The ability to efficiently conduct ROMP under neutral pH aqueous conditions would mark an important step towards utilizing aqueous ROMP with acid-sensitive functional groups or within a biological setting. Herein we describe our efforts to optimize ROMP in an aqueous environment under neutral pH conditions. Specifically, we found that the presence of excess chloride in solution as well as relatively small changes in pH near physiological conditions have a profound effect on molecular weight control, polymerization rate and overall monomer conversion. Additionally, we have applied our optimized conditions to polymerize a broad scope of water-soluble monomers and used this methodology to produce nanostructures via ring opening metathesis polymerization induced self-assembly (ROMPISA) under neutral pH aqueous conditions.
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Affiliation(s)
- Derek C. Church
- Department of NanoEngineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Lauren Takiguchi
- Department of NanoEngineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Jonathan K. Pokorski
- Department of NanoEngineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA 92093, USA
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Wang H, Hamilton M, Rempel GL. Hydrogenation of Sodium Oleate in Aqueous Emulsion with the Hoveyda–Grubbs Second-Generation Catalyst. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hui Wang
- Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A*STAR), Singapore, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Max Hamilton
- Department
of Chemical Engineering, University of Waterloo, 200 University Ave. West, Waterloo, Ontario N2L 3G1, Canada
| | - Garry L. Rempel
- Department
of Chemical Engineering, University of Waterloo, 200 University Ave. West, Waterloo, Ontario N2L 3G1, Canada
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Levin E, Ivry E, Diesendruck CE, Lemcoff NG. Water in N-heterocyclic carbene-assisted catalysis. Chem Rev 2015; 115:4607-92. [PMID: 25942582 DOI: 10.1021/cr400640e] [Citation(s) in RCA: 182] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Efrat Levin
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Elisa Ivry
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Charles E Diesendruck
- ‡Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - N Gabriel Lemcoff
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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Kim KO, Shin S, Kim J, Choi TL. Living Polymerization of Monomers Containing endo-Tricyclo[4.2.2.02,5]deca-3,9-diene Using Second Generation Grubbs and Hoveyda–Grubbs Catalysts: Approach to Synthesis of Well-Defined Star Polymers. Macromolecules 2014. [DOI: 10.1021/ma5000333] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Kyung Oh Kim
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
| | - Suyong Shin
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
| | - Junyong Kim
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
| | - Tae-Lim Choi
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
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Matsuo T, Yoshida T, Fujii A, Kawahara K, Hirota S. Effect of Added Salt on Ring-Closing Metathesis Catalyzed by a Water-Soluble Hoveyda–Grubbs Type Complex To Form N-Containing Heterocycles in Aqueous Media. Organometallics 2013. [DOI: 10.1021/om4005302] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Takashi Matsuo
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Takefumi Yoshida
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Akira Fujii
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Keiya Kawahara
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Shun Hirota
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
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Matsuo T, Imai C, Yoshida T, Saito T, Hayashi T, Hirota S. Creation of an artificial metalloprotein with a Hoveyda-Grubbs catalyst moiety through the intrinsic inhibition mechanism of α-chymotrypsin. Chem Commun (Camb) 2012; 48:1662-4. [PMID: 22212522 DOI: 10.1039/c2cc16898g] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An L-phenylalanyl chloromethylketone-based inhibitor equipped with a Hoveyda-Grubbs catalyst moiety was regioselectively incorporated into the cleft of α-chymotrypsin through the intrinsic inhibition mechanism of the protein to construct an artificial organometallic protein.
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Affiliation(s)
- Takashi Matsuo
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.
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Tenbrink K, Seßler M, Schatz J, Gröger H. Combination of Olefin Metathesis and Enzymatic Ester Hydrolysis in Aqueous Media in a One-Pot Synthesis. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100403] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Pawar GM, Weckesser J, Blechert S, Buchmeiser MR. Ring opening metathesis polymerization-derived block copolymers bearing chelating ligands: synthesis, metal immobilization and use in hydroformylation under micellar conditions. Beilstein J Org Chem 2010; 6:28. [PMID: 20502652 PMCID: PMC2874313 DOI: 10.3762/bjoc.6.28] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Accepted: 03/17/2010] [Indexed: 11/23/2022] Open
Abstract
Norborn-5-ene-(N,N-dipyrid-2-yl)carbamide (M1) was copolymerized with exo,exo-[2-(3-ethoxycarbonyl-7-oxabicyclo[2.2.1]hept-5-en-2-carbonyloxy)ethyl]trimethylammonium iodide (M2) using the Schrock catalyst Mo(N-2,6-Me₂-C₆H₃)(CHCMe₂Ph)(OCMe(CF₃)₂)₂[Mo] to yield poly(M1-b-M2). In water, poly(M1-b-M2) forms micelles with a critical micelle-forming concentration (cmc) of 2.8 x 10⁻⁶ mol L⁻¹; Reaction of poly(M1-b-M2) with [Rh(COD)Cl]₂ (COD = cycloocta-1,5-diene) yields the Rh(I)-loaded block copolymer poly(M1-b-M2)-Rh containing 18 mg of Rh(I)/g of block copolymer with a cmc of 2.2 x 10⁻⁶ mol L⁻¹. The Rh-loaded polymer was used for the hydroformylation of 1-octene under micellar conditions. The data obtained were compared to those obtained with a monomeric analogue, i.e. CH₃CON(Py)₂RhCl(COD) (C1, Py = 2-pyridyl). Using the polymer-supported catalyst under micellar conditions, a significant increase in selectivity, i.e. an increase in the n:iso ratio was accomplished, which could be further enhanced by the addition of excess ligand, e.g., triphenylphosphite. Special features of the micellar catalytic set up are discussed.
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Affiliation(s)
- Gajanan M Pawar
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany; Tel.: +49 (0)711-685-64075; Fax: +49 (0)711-685-64050
| | - Jochen Weckesser
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Siegfried Blechert
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Michael R Buchmeiser
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany; Tel.: +49 (0)711-685-64075; Fax: +49 (0)711-685-64050
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2008. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2009.07.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Bek D, Žilková N, Dědeček J, Sedláček J, Balcar H. SBA-15 Immobilized Ruthenium Carbenes as Catalysts for Ring Closing Metathesis and Ring Opening Metathesis Polymerization. Top Catal 2009. [DOI: 10.1007/s11244-009-9418-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Elias S, Vigalok A. Amphiphilic Block Polypeptide-Type Ligands for Micellar Catalysis in Water. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Brendgen T, Fahlbusch T, Frank M, Schühle D, Seßler M, Schatz J. Metathesis in Pure Water Mediated by Supramolecular Additives. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200800637] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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