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Ryzhakov D, Printz G, Jacques B, Messaoudi S, Dumas F, Dagorne S, Le Bideau F. Organo-catalyzed/initiated ring opening co-polymerization of cyclic anhydrides and epoxides: an emerging story. Polym Chem 2021. [DOI: 10.1039/d1py00020a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review deals with recent organo-catalyzed/initiated developments of co-polymerization of cyclic anhydrides and epoxides to access polyesters.
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Affiliation(s)
| | - Gaël Printz
- Institut de Chimie
- CNRS – Strasbourg University
- Strasbourg
- France
| | | | | | | | - Samuel Dagorne
- Institut de Chimie
- CNRS – Strasbourg University
- Strasbourg
- France
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3
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von Seggern N, Schindler T, Naumann S. Dual Catalytic Ring-Opening Polymerization of Ethylene Carbonate for the Preparation of Degradable PEG. Biomacromolecules 2020; 21:2661-2669. [DOI: 10.1021/acs.biomac.0c00360] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Nils von Seggern
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Tamara Schindler
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Stefan Naumann
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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4
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Ji C, Jie S, Braunstein P, Li BG. Fast and controlled ring-opening polymerization of δ-valerolactone catalyzed by benzoheterocyclic urea/MTBD catalysts. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01551b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
New benzoheterocyclic urea/MTBD catalysts are highly efficient and controllable in the ring-opening polymerization of δ-valerolactone under solvent-free conditions or in solution.
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Affiliation(s)
- Chenlin Ji
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Suyun Jie
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination
- CNRS, CHIMIE UMR 7177
- Université de Strasbourg
- 67081 Strasbourg Cedex
- France
| | - Bo-Geng Li
- State Key Laboratory of Chemical Engineering
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
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5
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Delgove MAF, Wróblewska AA, Stouten J, van Slagmaat CAMR, Noordijk J, De Wildeman SMA, Bernaerts KV. Organocatalyzed ring opening polymerization of regio-isomeric lactones: reactivity and thermodynamics considerations. Polym Chem 2020. [DOI: 10.1039/c9py01777a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Study of the kinetics and thermodynamics of the organocatalyzed ring opening polymerization of a regio-isomeric mixture of β,δ-trimethyl-ε-caprolactones (TMCL).
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Affiliation(s)
- Marie A. F. Delgove
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
| | - Aleksandra A. Wróblewska
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
| | - Jules Stouten
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
| | | | - Jurrie Noordijk
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
| | - Stefaan M. A. De Wildeman
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
| | - Katrien V. Bernaerts
- Aachen-Maastricht Institute for Biobased Materials (AMIBM)
- Maastricht University
- 6167 RD Geleen
- The Netherlands
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6
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Bandelli D, Alex J, Weber C, Schubert US. Polyester Stereocomplexes Beyond PLA: Could Synthetic Opportunities Revolutionize Established Material Blending? Macromol Rapid Commun 2019; 41:e1900560. [DOI: 10.1002/marc.201900560] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/15/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Damiano Bandelli
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University Jena Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University Jena Philosophenweg 7 07743 Jena Germany
| | - Julien Alex
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University Jena Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University Jena Philosophenweg 7 07743 Jena Germany
| | - Christine Weber
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University Jena Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University Jena Philosophenweg 7 07743 Jena Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC)Friedrich Schiller University Jena Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University Jena Philosophenweg 7 07743 Jena Germany
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Pothupitiya JU, Hewawasam RS, Kiesewetter MK. Urea and Thiourea H-Bond Donating Catalysts for Ring-Opening Polymerization: Mechanistic Insights via (Non)linear Free Energy Relationships. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00321] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jinal U. Pothupitiya
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Rukshika S. Hewawasam
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Matthew K. Kiesewetter
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
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9
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Chen S, Liu Y, Li Z, Wang X, Dong H, Sun H, Yang K, Gebru H, Guo K. H-bonding binary organocatalysis promoted amine-initiated ring-opening polymerizations of lactide from polysarcosine to diblock copolymers. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.10.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Koeller S, Lescure MH, Davies C, Desvergne JP, Massip S, Bibal B. Hydrogen-Bonding Amidoindoles in the Presence of Anions: An X-ray Structure of a Receptor at the Acid-Base Half-Equivalence that Binds an Anion. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sylvain Koeller
- Institut des Sciences Moléculaires; UMR CNRS 5255; Université de Bordeaux; 351 cours de la Libération 33405 Talence France
| | - Marie-Hélène Lescure
- Institut des Sciences Moléculaires; UMR CNRS 5255; Université de Bordeaux; 351 cours de la Libération 33405 Talence France
| | - Clotilde Davies
- Institut des Sciences Moléculaires; UMR CNRS 5255; Université de Bordeaux; 351 cours de la Libération 33405 Talence France
| | - Jean-Pierre Desvergne
- Institut des Sciences Moléculaires; UMR CNRS 5255; Université de Bordeaux; 351 cours de la Libération 33405 Talence France
| | - Stéphane Massip
- IECB5; CNRS UMS 3033/INSERM US001; Université de Bordeaux; 2 rue Robert Escarpit 33607 Pessac France
| | - Brigitte Bibal
- Institut des Sciences Moléculaires; UMR CNRS 5255; Université de Bordeaux; 351 cours de la Libération 33405 Talence France
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11
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Specklin D, Hild F, Chen L, Thévenin L, Munch M, Dumas F, Le Bideau F, Dagorne S. Bifunctional Squaramides as Organocatalysts for Lactide Polymerization: Catalytic Performance and Comparison with Monofunctional Analogues. ChemCatChem 2017. [DOI: 10.1002/cctc.201700272] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- David Specklin
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
| | - Frédéric Hild
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
| | - Li Chen
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
- BioCIS, Univ. Paris-Sud; CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Lucas Thévenin
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
| | - Maxime Munch
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
| | - Françoise Dumas
- BioCIS, Univ. Paris-Sud; CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Franck Le Bideau
- BioCIS, Univ. Paris-Sud; CNRS; Université Paris-Saclay; 92290 Châtenay-Malabry France
| | - Samuel Dagorne
- Institut de Chimie de Strasbourg; CNRS; Université de Strasbourg; 1 rue Blaise Pascal 67000 Strasbourg France
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12
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Rostami A, Sadeh E, Ahmadi S. Exploration of tertiary aminosquaramide bifunctional organocatalyst in controlled/living ring-opening polymerization of l-lactide. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28641] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ali Rostami
- Department of Polymer and Material Chemistry; Shahid Beheshti University; Tehran 19839-4716 I. R. Iran
| | - Elahe Sadeh
- Department of Polymer and Material Chemistry; Shahid Beheshti University; Tehran 19839-4716 I. R. Iran
| | - Shaghayegh Ahmadi
- Department of Polymer and Material Chemistry; Shahid Beheshti University; Tehran 19839-4716 I. R. Iran
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13
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Nzahou Ottou W, Conde-Mendizabal E, Pascual A, Wirotius AL, Bourichon D, Vignolle J, Robert F, Landais Y, Sotiropoulos JM, Miqueu K, Taton D. Organic Lewis Pairs Based on Phosphine and Electrophilic Silane for the Direct and Controlled Polymerization of Methyl Methacrylate: Experimental and Theoretical Investigations. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02205] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Winnie Nzahou Ottou
- Université
de Bordeaux, LCPO, UMR 5629, F-33600 Pessac, France
- CNRS, LCPO, UMR 5629, F-33600 Pessac, France
| | - Egoitz Conde-Mendizabal
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, Université de PAU & des Pays de l’Adour, CNRS, UNIV PAU & PAYS ADOUR, IPREM UMR 5254, 64000 PAU, France
| | - Ana Pascual
- Université
de Bordeaux, LCPO, UMR 5629, F-33600 Pessac, France
- CNRS, LCPO, UMR 5629, F-33600 Pessac, France
| | - Anne-Laure Wirotius
- Université
de Bordeaux, LCPO, UMR 5629, F-33600 Pessac, France
- CNRS, LCPO, UMR 5629, F-33600 Pessac, France
| | - Damien Bourichon
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, Université de PAU & des Pays de l’Adour, CNRS, UNIV PAU & PAYS ADOUR, IPREM UMR 5254, 64000 PAU, France
| | - Joan Vignolle
- Université
de Bordeaux, LCPO, UMR 5629, F-33600 Pessac, France
- CNRS, LCPO, UMR 5629, F-33600 Pessac, France
| | - Frédéric Robert
- Université
de Bordeaux, ISM, UMR 5255, 33400 Talence, France
- CNRS, ISM, UMR 5255, 33400 Talence, France
| | - Yannick Landais
- Université
de Bordeaux, ISM, UMR 5255, 33400 Talence, France
- CNRS, ISM, UMR 5255, 33400 Talence, France
| | - Jean-Marc Sotiropoulos
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, Université de PAU & des Pays de l’Adour, CNRS, UNIV PAU & PAYS ADOUR, IPREM UMR 5254, 64000 PAU, France
| | - Karinne Miqueu
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux, Université de PAU & des Pays de l’Adour, CNRS, UNIV PAU & PAYS ADOUR, IPREM UMR 5254, 64000 PAU, France
| | - Daniel Taton
- Université
de Bordeaux, LCPO, UMR 5629, F-33600 Pessac, France
- CNRS, LCPO, UMR 5629, F-33600 Pessac, France
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14
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Koeller S, Lescure MH, Davies C, Desvergne JP, Massip S, Bibal B. Insight into the deprotonation at the half-equivalence point of (thio)amido-benzimidazoles in the presence of anions. Org Biomol Chem 2017; 15:7263-7266. [DOI: 10.1039/c7ob01704a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three crystallographic structures highlight the acid–base half-equivalence point of hydrogen-bond donor (thio)amido-benzimidazoles induced by fluoride or benzoate salts with concomitant hydrogen-bonding and deprotonation as a merged synergic process.
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Affiliation(s)
- S. Koeller
- Université de Bordeaux
- Institut des Sciences Moléculaires UMR 5255
- 33405 Talence
- France
| | - M.-H. Lescure
- Université de Bordeaux
- Institut des Sciences Moléculaires UMR 5255
- 33405 Talence
- France
| | - C. Davies
- Université de Bordeaux
- Institut des Sciences Moléculaires UMR 5255
- 33405 Talence
- France
| | - J.-P. Desvergne
- Université de Bordeaux
- Institut des Sciences Moléculaires UMR 5255
- 33405 Talence
- France
| | - S. Massip
- Université de Bordeaux
- IECB
- CNRS UMS 3033/INSERM US001
- 33607 Pessac
- France
| | - B. Bibal
- Université de Bordeaux
- Institut des Sciences Moléculaires UMR 5255
- 33405 Talence
- France
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Naumann S, Wang D. Dual Catalysis Based on N-Heterocyclic Olefins for the Copolymerization of Lactones: High Performance and Tunable Selectivity. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02374] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Stefan Naumann
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Dongren Wang
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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Sherck NJ, Kim HC, Won YY. Elucidating a Unified Mechanistic Scheme for the DBU-Catalyzed Ring-Opening Polymerization of Lactide to Poly(lactic acid). Macromolecules 2016; 49:4699-4713. [PMID: 28959076 PMCID: PMC5613957 DOI: 10.1021/acs.macromol.6b00621] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of poly(lactic acid), PLA, is facile in the presence of the cyclic, organic amidine catalyst 1,8-diazabicyclo[5.4.0]undec-7-ene, DBU. Since DBU's catalytic capability was first reported by Lohmeijer and colleagues in 2006 for ring-opening polymerizations (ROP), there have been numerous studies conducted by a variety of groups on the catalytic functioning of DBU in the ROPs of cyclic esters resulting in a large body of un-unified material from a mechanistic standpoint. This lack of clarity will hamper engineering polymers with desired characteristics from cyclic ester and lactone monomers. The work outlined in this paper seeks to propose a unified picture of the mechanisms in the DBU catalyzed ROP of lactide. In providing this unified picture of the ROP our work encompassed: (i) proposing a detailed reaction network scheme, (ii) conducting syntheses of lactide and DBU over a range of initial concentrations, and (iii) kinetic modeling to further support the proposed reaction network. As a result, our work has produced: (i) kinetic data, (ii) a consistent, viable reaction scheme verified through kinetic modeling, (iii) deduced and quantified the interplay between polymerization routes facilitated by the presence of DBU, thus demonstrating the need for detailed kinetic studies to deconstruct complex reaction networks, (iv) the first experimental evidence in support of the combination of ketene aminal-ended chains with alcohol-ended chains, and (v) analyzed the robustness of the catalyst to acid contamination.
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Affiliation(s)
- Nicholas J. Sherck
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907
| | - Hyun Chang Kim
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907
| | - You-Yeon Won
- School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907
- Purdue University Center for Cancer Research, West Lafayette, Indiana 47907
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Zhang D, Jardel D, Peruch F, Calin N, Dufaud V, Dutasta JP, Martinez A, Bibal B. Azaphosphatranes as Hydrogen-Bonding Organocatalysts for the Activation of Carbonyl Groups: Investigation of Lactide Ring-Opening Polymerization. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Datta PP, Kiesewetter MK. Controlled Organocatalytic Ring-Opening Polymerization of ε-Thionocaprolactone. Macromolecules 2016; 49:774-780. [PMID: 27182087 PMCID: PMC4862612 DOI: 10.1021/acs.macromol.6b00136] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
For the first time, the controlled ring-opening polymerization (ROP) of ε-thionocaprolactone (tnCL) is conducted. The organocatalytic ROP of tnCL occurs without carbonyl scrambling, leading to homopoly(ε-thionocaprolactone) (PtnCL). The ROP by base catalysts alone is proposed to proceed via a nucleophilic mechanism, while the addition of an H-bond donating thiourea (TU) is shown to provide excellent reaction control. The increased reaction control provided by the TU occurs in the virtual absence of binding between tnCL and TU, and a mechanistic account for this observation is discussed. The monomer ring strain is measured and found to be similar to δ-valerolactone (VL). Copolymers with VL are synthesized, and the resulting analysis of the copolymer materials properties provides the only known physical characterizations of poly(thio(no)ester-co-ester)s.
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Affiliation(s)
- Partha P Datta
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Matthew K Kiesewetter
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
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19
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Peng KF, Chen Y, Chen CT. Synthesis and catalytic application of magnesium complexes bearing pendant indolyl ligands. Dalton Trans 2016; 44:9610-9. [PMID: 25923231 DOI: 10.1039/c5dt01173f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three novel indole-based ligand precursors [HIndPh(R), R = methoxy, HIndPh(OMe) (); thiomethoxy, HIndPh(SMe) (); and N,N'-dimethylamino, HIndPh(NMe2) ()] have been synthesized via Sonogashira and cyclization reactions with moderate to high yield. Reactions of these ligand precursors with 0.6 equivalent of Mg(n)Bu2 in THF afforded the magnesium bis-indolyl complexes , respectively. All the ligand precursors and related magnesium complexes have been characterized by NMR spectroscopy and elemental analyses. The molecular structures are reported for compounds and . Under optimized conditions, compound demonstrates efficient catalytic activities towards the ring opening polymerization of l-lactide and ε-caprolactone in the presence of BnOH.
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Affiliation(s)
- Kuo-Fu Peng
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan.
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20
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Jardel D, Davies C, Peruch F, Massip S, Bibal B. Protonated Phosphazenes: Structures and Hydrogen-Bonding Organocatalysts for Carbonyl Bond Activation. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Zhi X, Liu J, Li Z, Wang H, Wang X, Cui S, Chen C, Zhao C, Li X, Guo K. Ionic hydrogen bond donor organocatalyst for fast living ring-opening polymerization. Polym Chem 2016. [DOI: 10.1039/c5py01315a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A positive charge enhanced H-bond donor combined with H-bond acceptor as a bifunctional organocatalyst enables fast living ring-opening polymerization of lactide.
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22
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Xu S, Sun H, Liu J, Xu J, Pan X, Dong H, Liu Y, Li Z, Guo K. Internal Lewis pair enhanced H-bond donor: boronate-urea and tertiary amine co-catalysis in ring-opening polymerization. Polym Chem 2016. [DOI: 10.1039/c6py01436d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new protocol of internal Lewis pair enhanced H-bond (LPHBD) catalysis for ring opening polymerisation was developed using boronate-urea (BU) as a representative LPHBD combined with tertiary amines.
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Affiliation(s)
- Songquan Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Herui Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Jingjing Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Jiaxi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Xianfu Pan
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - He Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Yaya Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Zhenjiang Li
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Kai Guo
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
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23
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Eisenreich F, Viehmann P, Müller F, Hecht S. Electronic Activity Tuning of Acyclic Guanidines for Lactide Polymerization. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02137] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Fabian Eisenreich
- Department
of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str.
2, 12489 Berlin, Germany
| | - Philipp Viehmann
- Department
of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str.
2, 12489 Berlin, Germany
| | - Fabian Müller
- Department
of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str.
2, 12489 Berlin, Germany
| | - Stefan Hecht
- Department
of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str.
2, 12489 Berlin, Germany
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24
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Naumann S, Scholten PBV, Wilson JA, Dove AP. Dual Catalysis for Selective Ring-Opening Polymerization of Lactones: Evolution toward Simplicity. J Am Chem Soc 2015; 137:14439-45. [DOI: 10.1021/jacs.5b09502] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefan Naumann
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, U.K
| | | | - James A. Wilson
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, U.K
| | - Andrew P. Dove
- Department
of Chemistry, University of Warwick, CV4 7AL Coventry, U.K
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25
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Spink SS, Kazakov OI, Kiesewetter ET, Kiesewetter MK. Rate Accelerated Organocatalytic Ring-Opening Polymerization of L-Lactide via the Application of a Bis(thiourea) H-bond Donating Cocatalyst. Macromolecules 2015; 48:6127-6131. [PMID: 27182086 PMCID: PMC4863465 DOI: 10.1021/acs.macromol.5b01320] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A cocatalyst system consisting of an alkylamine base and a bis(thiourea) featuring a linear alkane tether is shown to dramatically increase the rate of ring-opening polymerization (ROP) of L-lactide versus previously disclosed monothiourea H-bond donors. Rate acceleration occurs regardless of the identity of the alkylamine cocatalyst, and the ROP remains controlled yielding poly(lactide) with narrow molecular weight distributions, predictable molecular weights and high selectivity for monomer. This H-bond mediated ROP of L-lactide constitutes a rare, clear example of rate acceleration with bis(thiourea) H-bond donors versus monothioureas, and the bis(thiourea) is shown to remain highly active for ROP at fractional percent catalyst loadings. Activation at a single monomer ester by both thiourea moieties is implicated as the source of rate acceleration.
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Affiliation(s)
- Samuel S. Spink
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881 United States
| | - Oleg I. Kazakov
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881 United States
| | | | - Matthew K. Kiesewetter
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881 United States
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26
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Kazakov OI, Kiesewetter MK. Cocatalyst Binding Effects in Organocatalytic Ring-Opening Polymerization of l-Lactide. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01140] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Oleg I. Kazakov
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Matthew K. Kiesewetter
- Department of Chemistry, University of Rhode Island, Kingston, Rhode Island 02881, United States
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27
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Saito T, Aizawa Y, Tajima K, Isono T, Satoh T. Organophosphate-catalyzed bulk ring-opening polymerization as an environmentally benign route leading to block copolyesters, end-functionalized polyesters, and polyester-based polyurethane. Polym Chem 2015. [DOI: 10.1039/c5py00533g] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
To expand the potential of an organophosphate catalyst, ring-opening polymerization of cyclic esters, cyclic ester-ether, and cyclic carbonate was demonstrated under bulk conditions.
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Affiliation(s)
- Tatsuya Saito
- Graduate School of Chemical Sciences and Engineering
- Hokkaido University
- Sapporo, 060-8628
- Japan
| | - Yusuke Aizawa
- Graduate School of Chemical Sciences and Engineering
- Hokkaido University
- Sapporo, 060-8628
- Japan
| | - Kenji Tajima
- Division of Biotechnology and Macromolecular Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Takuya Isono
- Division of Biotechnology and Macromolecular Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Toshifumi Satoh
- Division of Biotechnology and Macromolecular Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
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28
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Proisl K, Kafka S, Urankar D, Gazvoda M, Kimmel R, Košmrlj J. Fischer indolisation of N-(α-ketoacyl)anthranilic acids into 2-(indol-2-carboxamido)benzoic acids and 2-indolyl-3,1-benzoxazin-4-ones and their NMR study. Org Biomol Chem 2014; 12:9650-64. [PMID: 25347568 DOI: 10.1039/c4ob01714e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-(α-ketoacyl)anthranilic acids reacted with phenylhydrazinium chloride in boiling acetic acid to afford 2-(indol-2-carboxamido)benzoic acids in good to excellent yields and 2-indolyl-3,1-benzoxazin-4-ones as by-products. The formation of the latter products could easily be suppressed by a hydrolytic workup. Alternatively, by increasing the reaction temperature and/or time, 2-indolyl-3,1-benzoxazin-4-ones can be obtained exclusively. Optimisations of the reaction conditions as well as the scope and the course of the transformations were investigated. The products were characterized by (1)H, (13)C and (15)N NMR spectroscopy. The corresponding resonances were assigned on the basis of the standard 1D and gradient selected 2D NMR experiments ((1)H-(1)H gs-COSY, (1)H-(13)C gs-HSQC, (1)H-(13)C gs-HMBC) with (1)H-(15)N gs-HMBC as a practical tool to determine (15)N NMR chemical shifts at the natural abundance level of (15)N isotope.
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Affiliation(s)
- Karel Proisl
- Department of Chemistry, Faculty of Technology, Tomas Bata University in Zlin, 762 72 Zlin, Czech Republic.
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29
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Kazakov OI, Datta PP, Isajani M, Kiesewetter ET, Kiesewetter MK. Cooperative Hydrogen-Bond Pairing in Organocatalytic Ring-Opening Polymerization. Macromolecules 2014; 47:7463-7468. [PMID: 25400295 PMCID: PMC4230384 DOI: 10.1021/ma501847x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/09/2014] [Indexed: 11/29/2022]
Abstract
Thiourea (TU)/amine base cocatalysts are commonly employed for well-controlled, highly active "living" organocatalytic ring-opening polymerizations (ROPs) of cyclic esters and carbonates. In this work, several of the most active cocatalyst pairs are shown by 1H NMR binding studies to be highly associated in solution, dominating all other known noncovalent catalyst/reagent interactions during ROP. One strongly binding catalyst pair behaves kinetically as a unimolecular catalyst species. The high selectivity and activity exhibited by these ROP organocatalysts are attributed to the strong binding between the two cocatalysts, and the predictive utility of these binding parameters is applied for the discovery of a new, highly active cocatalyst pair.
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Affiliation(s)
- Oleg I. Kazakov
- Department of Chemistry, University
of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Partha P. Datta
- Department of Chemistry, University
of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Meghedi Isajani
- Department of Chemistry, University
of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Elizabeth T. Kiesewetter
- Department of Chemistry, University
of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Matthew K. Kiesewetter
- Department of Chemistry, University
of Rhode Island, Kingston, Rhode Island 02881, United States
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30
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Thomas C, Gladysz JA. Highly Active Families of Catalysts for the Ring-Opening Polymerization of Lactide: Metal Templated Organic Hydrogen Bond Donors Derived from 2-Guanidinobenzimidazole. ACS Catal 2014. [DOI: 10.1021/cs500134z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Coralie Thomas
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
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31
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Koeller S, Thomas C, Peruch F, Deffieux A, Massip S, Léger JM, Desvergne JP, Milet A, Bibal B. α-Halogenoacetanilides as Hydrogen-Bonding Organocatalysts that Activate Carbonyl Bonds: Fluorine versus Chlorine and Bromine. Chemistry 2014; 20:2849-59. [DOI: 10.1002/chem.201303662] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Indexed: 02/04/2023]
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32
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Thomas C, Brut S, Bibal B. Quaternary ammoniums and a cationic sodium complex as supramolecular catalysts in ring-opening of epoxides by amines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.01.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Kadota J, Pavlović D, Hirano H, Okada A, Agari Y, Bibal B, Deffieux A, Peruch F. Controlled bulk polymerization of l-lactide and lactones by dual activation with organo-catalytic systems. RSC Adv 2014. [DOI: 10.1039/c4ra01239a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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34
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Couffin A, Martín-Vaca B, Bourissou D, Navarro C. Selective O-acyl ring-opening of β-butyrolactone catalyzed by trifluoromethane sulfonic acid: application to the preparation of well-defined block copolymers. Polym Chem 2014. [DOI: 10.1039/c3py00935a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
HOTf catalyzes ring-opening of β-butyrolactone selectively via O-acyl bond cleavage, enabling efficient copolymerization.
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35
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Guillerm B, Lemaur V, Cornil J, Lazzaroni R, Dubois P, Coulembier O. Ammonium betaines: efficient ionic nucleophilic catalysts for the ring-opening polymerization of l-lactide and cyclic carbonates. Chem Commun (Camb) 2014; 50:10098-101. [DOI: 10.1039/c4cc03347g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ammonium betaines: the missing piece between hydrogen-bonding and nucleophilic-based ROP catalysts.
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Affiliation(s)
- Brieuc Guillerm
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory of Polymeric and Composite Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
| | - Vincent Lemaur
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory for Chemistry of Novel Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
| | - Jérôme Cornil
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory for Chemistry of Novel Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
| | - Roberto Lazzaroni
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory for Chemistry of Novel Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
| | - Philippe Dubois
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory of Polymeric and Composite Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
| | - Olivier Coulembier
- Center of Innovation and Research in Materials and Polymers (CIRMAP)
- Laboratory of Polymeric and Composite Materials
- University of Mons (UMONS)
- 7000 Mons, Belgium
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36
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Couffin A, Thillaye du Boullay O, Vedrenne M, Navarro C, Martin-Vaca B, Bourissou D. Enantio-differentiation of O-heterocycles using a binol-derived disulfonimide as a chiral solvating agent. Chem Commun (Camb) 2014; 50:5997-6000. [DOI: 10.1039/c4cc00466c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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37
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Coulembier O, De Winter J, Josse T, Mespouille L, Gerbaux P, Dubois P. One-step synthesis of polylactide macrocycles from sparteine-initiated ROP. Polym Chem 2014. [DOI: 10.1039/c3py01380d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Piedra-Arroni E, Amgoune A, Bourissou D. Dual catalysis: new approaches for the polymerization of lactones and polar olefins. Dalton Trans 2013; 42:9024-9. [DOI: 10.1039/c3dt00074e] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Thomas C, Milet A, Peruch F, Bibal B. Activation of carbonyl bonds by quaternary ammoniums and a (Na+:crown-ether) complex: investigation of the ring-opening polymerization of cyclic esters. Polym Chem 2013. [DOI: 10.1039/c3py00304c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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40
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Todd R, Rubio G, Hall DJ, Tempelaar S, Dove AP. Benzyl bispidine as an efficient replacement for (−)-sparteine in ring opening polymerisation. Chem Sci 2013. [DOI: 10.1039/c2sc22053a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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41
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Hancock SL, Mahon MF, Jones MD. Salen complexes based on 1,4-diaminocyclohexane and their exploitation for the polymerisation of rac-lactide. NEW J CHEM 2013. [DOI: 10.1039/c3nj00111c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Abstract
Organic catalysis in ring-opening polymerization (ROP) has become a powerful alternative to more traditional metal-based catalysts. The field has developed to a point at which there are not only excellent low cost and easy to use organocatalysts for day-to-day polymerizations, but the ability to precisely control the synthesis of advanced polymer architectures and ROP monomers that are extremely challenging to polymerize with other catalysts now exists. This viewpoint article will highlight the key advances in organocatalyst design with the aim of encouraging the wider application of organic catalysts in ROP.
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Affiliation(s)
- Andrew P. Dove
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
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43
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Controlled/living ring-opening polymerization of ɛ-caprolactone catalyzed by phosphoric acid. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4586-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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44
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Huang A, Qiao Z, Zhang X, Yu W, Zheng Q, Ma Y, Ma C. A transition metal-free tandem process to pyrrolopyrazino[2,3-d]pyridazine-diones. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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45
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Thomas C, Peruch F, Bibal B. Ring-opening polymerization of lactones using supramolecular organocatalysts under simple conditions. RSC Adv 2012. [DOI: 10.1039/c2ra22535b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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46
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Huang A, Liu F, Zhan C, Liu Y, Ma C. One-pot synthesis of pyrrolo[1,2-a]quinoxalines. Org Biomol Chem 2011; 9:7351-7. [PMID: 21894335 DOI: 10.1039/c1ob05936j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A transition metal-free process for the regioselective synthesis of pyrrolo[1,2-a]quinoxalines under mild conditions in one-pot is described. The reaction afforded a variety of products in good to excellent yields. Indolo[1,2-a]quinoxalines were also synthesized from indole-2-carboxamides under the same conditions.
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Affiliation(s)
- Aiping Huang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P R China
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47
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Miyake GM, Chen EYX. Cinchona Alkaloids as Stereoselective Organocatalysts for the Partial Kinetic Resolution Polymerization of rac-Lactide. Macromolecules 2011. [DOI: 10.1021/ma2007199] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Garret M. Miyake
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Eugene Y.-X. Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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48
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Thomas C, Peruch F, Deffieux A, Milet A, Desvergne JP, Bibal B. Phenols and Tertiary Amines: An Amazingly Simple Hydrogen-Bonding Organocatalytic System Promoting Ring Opening Polymerization. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100013] [Citation(s) in RCA: 36] [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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49
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Susperregui N, Delcroix D, Martin-Vaca B, Bourissou D, Maron L. Ring-opening polymerization of ε-caprolactone catalyzed by sulfonic acids: computational evidence for bifunctional activation. J Org Chem 2011; 75:6581-7. [PMID: 20799719 DOI: 10.1021/jo101346t] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism of ring-opening of ε-caprolactone by methanol catalyzed by trifluoromethane and methane sulfonic acids has been studied computationally at the DFT level of theory. For both elementary steps, the sulfonic acid was predicted to behave as a bifunctional catalyst. The nucleophilic addition proceeds via activation of both the monomer and the alcohol. The ring-opening involves the cleavage of the endo C-O bond of the tetrahedral intermediate with concomitant proton transfer. In both cases, the sulfonic acid acts as a proton shuttle via its acidic hydrogen atom and basic oxygen atoms. The computed activation barriers are consistent with the relatively fast polymerizations observed experimentally at room temperature with both catalysts.
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Affiliation(s)
- Nicolas Susperregui
- University of Toulouse, INSA, UPS, LPCNO, 135 Avenue de Rangueil, F-31077 Toulouse, France
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50
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Middleton H, Tempelaar S, Haddleton DM, Dove AP. Organocatalytic synthesis of astaxanthin-containing poly(lactide)s. Polym Chem 2011. [DOI: 10.1039/c0py00227e] [Citation(s) in RCA: 18] [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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