1
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Palenzuela M, Mula E, Blanco C, Sessini V, Shakaroun RM, Li H, Guillaume SM, Mosquera MEG. Copolymerization of β-Butyrolactones into Functionalized Polyhydroxyalkanoates Using Aluminum Catalysts: Influence of the Initiator in the Ring-Opening Polymerization Mechanism. Macromol Rapid Commun 2024:e2400091. [PMID: 38690992 DOI: 10.1002/marc.202400091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 04/22/2024] [Indexed: 05/03/2024]
Abstract
Within bioplastics, natural poly(3-hydroxybutyrate) (PHB) stands out as fully biocompatible and biodegradable, even in marine environments; however, its high isotacticity and crystallinity limits its mechanical properties and hence its applications. PHB can also be synthesized with different tacticities via a catalytic ring-opening polymerization (ROP) of rac-β-butyrolactone (BBL), paving the way to PHB with better thermomechanical and processability properties. In this work, the catalyst family is extended based on aluminum phenoxy-imine methyl catalyst [AlMeL2], that reveals efficient in the ROP of BBL, to the halogeno analogous complex [AlClL2]. As well, the impact on the ROP mechanism of different initiators is further explored with a particular focus in dimethylaminopyridine (DMAP), a hardly studied initiator for the ROP of BBL. A thorough mechanistic study is performed that evidences the presence of two concomitant DMAP-mediated mechanisms, that lead to either a DMAP or a crotonate end-capping group. Besides, in order to increase the possibilities of PHB post-polymerization functionalization, the introduction of a side-chain functionality is explored, establishing the copolymerization of BBL with β-allyloxymethylene propiolactone (BPLOAll), resulting in well-defined P(BBL-co-BPLOAll) copolymers.
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Affiliation(s)
- Miguel Palenzuela
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28871, Spain
| | - Esther Mula
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28871, Spain
| | - Carlos Blanco
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28871, Spain
| | - Valentina Sessini
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28871, Spain
| | - Rama M Shakaroun
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226, Rennes, F-35042, France
| | - Hui Li
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226, Rennes, F-35042, France
| | - Sophie M Guillaume
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes, UMR 6226, Rennes, F-35042, France
| | - Marta E G Mosquera
- Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación en Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, Madrid, 28871, Spain
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2
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Yolsal U, Shaw PJ, Lowy PA, Chambenahalli R, Garden JA. Exploiting Multimetallic Cooperativity in the Ring-Opening Polymerization of Cyclic Esters and Ethers. ACS Catal 2024; 14:1050-1074. [PMID: 38269042 PMCID: PMC10804381 DOI: 10.1021/acscatal.3c05103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/17/2023] [Accepted: 12/19/2023] [Indexed: 01/26/2024]
Abstract
The use of multimetallic complexes is a rapidly advancing route to enhance catalyst performance in the ring-opening polymerization of cyclic esters and ethers. Multimetallic catalysts often outperform their monometallic analogues in terms of reactivity and/or polymerization control, and these improvements are typically attributed to "multimetallic cooperativity". Yet the origins of multimetallic cooperativity often remain unclear. This review explores the key factors underpinning multimetallic cooperativity, including metal-metal distances, the flexibility, electronics and conformation of the ligand framework, and the coordination environment of the metal centers. Emerging trends are discussed to provide insights into why cooperativity occurs and how to harness cooperativity for the development of highly efficient multimetallic catalysts.
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Affiliation(s)
- Utku Yolsal
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Peter J. Shaw
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Phoebe A. Lowy
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Raju Chambenahalli
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Jennifer A. Garden
- School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
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3
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Buchard A, Davidson MG, Gobius du Sart G, Jones MD, Kociok-Köhn G, McCormick SN, McKeown P. Unexpected Periodicity in Cationic Group 5 Initiators for the Ring-Opening Polymerization of Lactones. Inorg Chem 2024; 63:27-38. [PMID: 38118120 PMCID: PMC10777398 DOI: 10.1021/acs.inorgchem.3c03854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/23/2023] [Accepted: 12/04/2023] [Indexed: 12/22/2023]
Abstract
ε-Caprolactone (ε-CL) adducts of cationic, amine tris(phenolate)-supported niobium(V) and tantalum(V) ethoxides initiate the ring-opening polymerization of lactones. The Ta(V) species prepared and applied catalytically herein exhibits higher activity in the ring-opening polymerization (ROP) of ε-caprolactone than the previously reported, isostructural Nb(V) complex, contradicting literature comparisons of Nb(V)- and Ta(V)-based protocols. Both systems also initiate the ROP of δ-valerolactone and rac-β-butyrolactone, kinetic studies confirming retention of higher activity by the Ta congener. Polymerizations of rac-β-butyrolactone and δ-valerolactone were previously unrealized under Group V- or Ta-mediated conditions, respectively, although the former has afforded only low molecular weight, cyclic poly-3-hydroxybutyrate. Cationic ethoxo-Nb(V) and -Ta(V) δ-valerolactone adducts are also reported, demonstrating the facility of δ-valerolactone as a ligand and the generality of the synthetic method. Both δ-valerolactone-bearing complexes initiate the ROP of ε-caprolactone, δ-valerolactone, and rac-β-butyrolactone. Accordingly, we have elucidated trends in reactivity and investigated the initiation mechanism for such systems, the insertion event being predicated upon intramolecular nucleophilic attack on the coordinated lactone by the adjacent alkoxide moiety. This mechanism enables quantitative, stoichiometric installation of a single monomer residue distinct from the bulk of the polymer chain, and permits modification of polymer properties via both manipulation of the molecular architecture and tuning of the polymerization kinetics, and thus dispersity, through hitherto inaccessible independent control of the initiation event.
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Affiliation(s)
- Antoine Buchard
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, United Kingdom
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Matthew G. Davidson
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, United Kingdom
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | | | - Matthew D. Jones
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, United Kingdom
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Gabriele Kociok-Köhn
- Material
and Chemical Characterization and Analysis Facility (MC), University of Bath, Bath BA2 7AY, United Kingdom
| | - Strachan N. McCormick
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, United Kingdom
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
| | - Paul McKeown
- Department
of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
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4
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Mankaev BN, Karlov SS. Metal Complexes in the Synthesis of Biodegradable Polymers: Achievements and Prospects. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6682. [PMID: 37895663 PMCID: PMC10608263 DOI: 10.3390/ma16206682] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023]
Abstract
This review describes recent advances in the synthesis of homopolymers of lactide and related cyclic esters via ring-opening polymerization (ROP) in the presence of metal complexes based on group 1, 2, 4, 12, 13 and 14 metals. Particular attention is paid to the influence of the initiator structure on the properties of the obtaining homo- and copolymers. Also, a separate chapter is devoted to the study of metal complexes in the synthesis of copolymers of lactide and lactones. This review highlights the efforts made over the last ten years or so, and shows how main-group metals have received increasing attention in the field of the polymerization of lactide and related cyclic esters.
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Affiliation(s)
- Badma N. Mankaev
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia;
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, 119991 Moscow, Russia
| | - Sergey S. Karlov
- Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia;
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Science, 119991 Moscow, Russia
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5
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Buchard A, Davidson MG, Gobius du Sart G, Jones MD, Kociok-Köhn G, McCormick SN, Mckeown P. Coordination of ε-Caprolactone to a Cationic Niobium(V) Alkoxide Complex: Fundamental Insight into Ring-Opening Polymerization via Coordination-Insertion. Inorg Chem 2023; 62:15688-15699. [PMID: 37695575 PMCID: PMC10523432 DOI: 10.1021/acs.inorgchem.3c02491] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Indexed: 09/12/2023]
Abstract
We report three niobium-based initiators for the catalytic ring-opening polymerization (ROP) of ε-caprolactone, exhibiting good activity and molecular weight control. In particular, we have prepared on the gram-scale and fully characterized a monometallic cationic alkoxo-Nb(V) ε-caprolactone adduct representing, to the best of our knowledge, an unprecedented example of a metal complex with an intact lactone monomer and a functional ROP-initiating group simultaneously coordinated at the metal center. At 80 °C, all three systems initiate the immortal solution-state ROP of ε-caprolactone via a coordination-insertion mechanism, which has been confirmed through experimental studies, and is supported by computational data. Natural bond orbital calculations further indicate that polymerization may necessitate isomerization about the metal center between the alkoxide chain and the coordinated monomer. The observations made in this work are expected to inform mechanistic understanding both of amine tris(phenolate)-supported metal alkoxide ROP initiators, including various highly stereoselective systems for the polymerization of lactides and of coordination-insertion-type ROP protocols more broadly.
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Affiliation(s)
- Antoine Buchard
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, U.K.
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K.
| | - Matthew G. Davidson
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, U.K.
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K.
| | | | - Matthew D. Jones
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, U.K.
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K.
| | - Gabriele Kociok-Köhn
- Material
and Chemical Characterization and Analysis Facility (MC2), University of Bath, Bath BA2 7AY, U.K.
| | - Strachan N. McCormick
- Institute
for Sustainability, University of Bath, Bath BA2 7AY, U.K.
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K.
| | - Paul Mckeown
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K.
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6
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Wannipurage D, D'Aniello S, Pappalardo D, Kulathungage LW, Ward CL, Anderson DP, Groysman S, Mazzeo M. Simple magnesium alkoxides: synthesis, molecular structure, and catalytic behaviour in the ring-opening polymerization of lactide and macrolactones and in the copolymerization of maleic anhydride and propylene oxide. Dalton Trans 2023; 52:8077-8091. [PMID: 37232395 PMCID: PMC11066581 DOI: 10.1039/d3dt00785e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The synthesis of two chiral bulky alkoxide pro-ligands, 1-adamantyl-tert-butylphenylmethanol HOCAdtBuPh and 1-adamantylmethylphenylmethanol HOCAdMePh, is reported and their coordination chemistry with magnesium(II) is described and compared with the coordination chemistry of the previously reported achiral bulky alkoxide pro-ligand HOCtBu2Ph. Treatment of n-butyl-sec-butylmagnesium with two equivalents of the racemic mixture of HOCAdtBuPh led selectively to the formation of the mononuclear bis(alkoxide) complex Mg(OCAdtBuPh)2(THF)2. 1H NMR spectroscopy and X-ray crystallography suggested the selective formation of the C2-symmetric homochiral diastereomer Mg(OCRAdtBuPh)2(THF)2/Mg(OCSAdtBuPh)2(THF)2. In contrast, the less sterically encumbered HOCAdMePh led to the formation of dinuclear products indicating only partial alkyl group substitution. The mononuclear Mg(OCAdtBuPh)2(THF)2 complex was tested as a catalyst in different reactions for the synthesis of polyesters. In the ROP of lactide, Mg(OCAdtBuPh)2(THF)2 demonstrated very high activity, higher than that shown by Mg(OCtBu2Ph)2(THF)2, although with moderate control degrees. Both Mg(OCAdtBuPh)2(THF)2 and Mg(OCtBu2Ph)2(THF)2 were found to be very effective in the polymerization of macrolactones such as ω-pentadecalactone (PDL) and ω-6-hexadecenlactone (HDL) also under mild reaction conditions that are generally prohibitive for these substrates. The same catalysts demonstrated efficient ring-opening copolymerization (ROCOP) of propylene oxide (PO) and maleic anhydride (MA) to produce poly(propylene maleate).
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Affiliation(s)
- Duleeka Wannipurage
- Department of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA.
| | - Sara D'Aniello
- Department of Chemistry and Biology "A. Zambelli" University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy.
| | - Daniela Pappalardo
- Dipartimento di Scienze e Tecnologie, Università del Sannio, via de Sanctis snc, 82100 Benevento, Italy
| | | | - Cassandra L Ward
- Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, USA
| | - Dennis P Anderson
- Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, USA
| | - Stanislav Groysman
- Department of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA.
| | - Mina Mazzeo
- Department of Chemistry and Biology "A. Zambelli" University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy.
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7
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Buchard A, Chuck CJ, Davidson MG, Gobius du Sart G, Jones MD, McCormick SN, Russell AD. A Highly Active and Selective Zirconium-Based Catalyst System for the Industrial Production of Poly(lactic acid). ACS Catal 2023; 13:2681-2695. [PMID: 36846823 PMCID: PMC9942235 DOI: 10.1021/acscatal.2c05690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/20/2023] [Indexed: 02/10/2023]
Abstract
The biodegradable, aliphatic polyester poly(lactic acid), PLA, is a leading bio-based alternative to petrochemical-derived plastic materials across a range of applications. Widely reported in the available literature as a benchmark for PLA production via the bulk ring-opening polymerization of lactides is the use of divalent tin catalysts, and particularly tin(II) bis(2-ethylhexanoate). We present an alternative zirconium-based system that combines an inexpensive Group IV metal with the robustness, high activity, control, and designed compatibility with existing facilities and processes, that are required for industrial use. We have carried out a comprehensive kinetic study and applied a combined experimental and theoretical approach to understanding the mechanism by which the polymerization of lactide proceeds in the presence of this system. In the laboratory-scale (20 g) polymerization of recrystallized racemic d,l-lactide (rac-lactide), we have measured catalyst turnover frequencies up to at least 56,000 h-1, and confirmed the reported protocols' resistance toward undesirable epimerization, transesterification, and chain scission processes, deleterious to the properties of the polymer product. Further optimization and scale-up under industrial conditions have confirmed the relevance of the catalytic protocol to the commercial production of melt-polymerized PLA. We were able to undertake the efficient preparation of high-molecular-weight PLA on the 500-2000 g scale, via the selective and well-controlled polymerization of commercial polymer-grade l-lactide under challenging, industrially relevant conditions, and at metal concentrations as low as 8-12 ppm Zr by weight ([Zr] = 1.3 × 10-3 to 1.9 × 10-3 mol %). Under those conditions, a catalyst turnover number of at least 60,000 was attained, and the activity of the catalyst was comparable to that of tin(II) bis(2-ethylhexanoate).
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Affiliation(s)
- Antoine Buchard
- Institute
for Sustainability, University of Bath, BathBA2 7AY, U.K.,Department
of Chemistry, University of Bath, BathBA2 7AY, U.K.
| | - Christopher J. Chuck
- Institute
for Sustainability, University of Bath, BathBA2 7AY, U.K.,Department
of Chemical Engineering, University of Bath, BathBA2 7AY, U.K.
| | - Matthew G. Davidson
- Institute
for Sustainability, University of Bath, BathBA2 7AY, U.K.,Department
of Chemistry, University of Bath, BathBA2 7AY, U.K.,
| | | | - Matthew D Jones
- Institute
for Sustainability, University of Bath, BathBA2 7AY, U.K.,Department
of Chemistry, University of Bath, BathBA2 7AY, U.K.
| | - Strachan N. McCormick
- Institute
for Sustainability, University of Bath, BathBA2 7AY, U.K.,Department
of Chemistry, University of Bath, BathBA2 7AY, U.K.,
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8
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Chlupatý T, Růžičková Z, Kampová H, Merna J, Růžička A. Lithium, Magnesium, and Zinc Centers N,N'-Chelated by an Amine-Amide Hybrid Ligand. Inorg Chem 2022; 61:9392-9404. [PMID: 35706334 DOI: 10.1021/acs.inorgchem.1c03850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis and structure of lithium, magnesium, and zinc complexes N,N'-chelated by a hybrid amine-amido ligand ([2-(Me2NCH2)C6H4NR]-, abbreviated as LNR, where R = H, SiMe3, or Bn) are reported. The reaction of the least sterically demanding LNH with various magnesium sources gives the hexameric imide [LNMg]6 (4) by the elimination of n-butane from LNHMgnBu (2) or by the reaction of LNHLi (1) with MeMgBr. [LNH]2Mg (3) is obtained through the addition of 0.5 equiv of nBu2Mg or Mg[N(SiMe3)2]2 to LNH2 and with 1 equiv of nBu2Mg reacting to 2. Both LNHMgN(SiMe3)2 (6) and isostructural LNHZnN(SiMe3)2 (16) have been prepared using two different approaches: monodeprotonation of LNH2 by Zn/Mg[N(SiMe3)2]2 in a 1:1 ratio or ligand substitution of 2 or LNHZnEt (12) by 0.5 equiv of Sn[N(SiMe3)2]2. The reactions of 2 or 3 with 1 provide the heterotrimetallic complex [LNH]4Li2Mg (5). Benzyl- or trimethylsilyl-substituted anilines [LN(SiMe3)H (7) and LN(Bn)H (8)] with 0.5 equiv of nBu2Mg allow the formation of homoleptic bis(amides) of the [LN(R)]2Mg type (10 and 11). Nevertheless, only the silylated secondary amine 7 is able to provide the heteroleptic n-butylmagnesium amide LN(SiMe3)MgnBu (9) upon reaction with an equimolar amount of nBu2Mg. Similarly, 12, [LNH]2Zn (13), LN(R)ZnEt (17 and 18), and [LN(R)]2Zn [R = SiMe3 (19) and Bn (20)] were prepared by the monodeprotonation of LNH2 or LN(R)H using Et2Zn in the corresponding stoichiometric ratio. LNHZnI was prepared by the nucleophilic substitution of an ethyl chain in 12 by molecular iodine. A heterometallic complex, [LNH]4Li2Zn (14), analogous to 5 was prepared from 12 or 13 with 1 or 2 equiv of 1, respectively.
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Affiliation(s)
- Tomáš Chlupatý
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Zdeňka Růžičková
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Hana Kampová
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
| | - Jan Merna
- Faculty of Chemical Technology, Department of Polymers, University of Chemistry and Technology, Technická 5, CZ-166 28 Prague 6, Czech Republic
| | - Aleš Růžička
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic
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9
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Zhang XY, Zhai DD, Liu YF, Guan BT. A potassium magnesiate complex: Synthesis, structure and catalytic intermolecular hydroamination of styrenes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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10
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Petrus R, Lis T, Kowaliński A. Use of heterometallic alkali metal–magnesium aryloxides in ring-opening polymerization of cyclic esters. Dalton Trans 2022; 51:9144-9158. [DOI: 10.1039/d2dt00731b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The alkali metal–magnesium aryloxides of the general formula [Mg2M′2(OAr)6(THF)x] (for M′ = Li, Na, K, and x = 0, 2, 4) were used to investigate the cooperativity effect of different metal sites on the ring-opening polymerization of l-lactide.
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Affiliation(s)
- Rafał Petrus
- Faculty of Chemistry, Wrocław University of Science and Technology, 23 Smoluchowskiego, 50-370 Wrocław, Poland
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Adrian Kowaliński
- Faculty of Chemistry, Wrocław University of Science and Technology, 23 Smoluchowskiego, 50-370 Wrocław, Poland
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11
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D'Auria I, Lamberti M, Rescigno R, Venditto V, Mazzeo M. Copolymerization of L-Lactide and ε-Caprolactone promoted by zinc complexes with phosphorus based ligands. Heliyon 2021; 7:e07630. [PMID: 34381896 PMCID: PMC8339243 DOI: 10.1016/j.heliyon.2021.e07630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/02/2021] [Accepted: 07/20/2021] [Indexed: 11/04/2022] Open
Abstract
The zinc complexes 1 and 2 bearing chelating phosphorous based pincer ligands were found to catalyze the ring-opening copolymerization of L-lactide and ε-caprolactone in the melt at 110 °C to obtain a series of random copolymers in which the monomer distributions were coherent with the monomer ratio in the feed. All the obtained copolymers showed high molecular masses with monomodal and moderately narrow distributions. The thermal properties of the achieved copolymers (Tg, glass transition temperature, and Tm, melting temperature) were strongly dependent on their composition. A linear dependence of Tg with molar percentage of lactide in the copolymers was observed over a temperature range from -59 °C (pure polycaprolactone) to 55 °C (pure polylactide).
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Affiliation(s)
- Ilaria D'Auria
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Marina Lamberti
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Raffaella Rescigno
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy.,INSTM Research Unit, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology "Adolfo Zambelli", University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
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12
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D'Auria I, Santulli F, Ciccone F, Giannattasio A, Mazzeo M, Pappalardo D. Synthesis of Semi‐Aromatic Di‐Block Polyesters by Terpolymerization of Macrolactones, Epoxides, and Anhydrides. ChemCatChem 2021. [DOI: 10.1002/cctc.202100434] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ilaria D'Auria
- Department of Chemistry and Biology “A. Zambelli” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Federica Santulli
- Department of Chemistry and Biology “A. Zambelli” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Francesca Ciccone
- Department of Chemistry and Biology “A. Zambelli” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Alessia Giannattasio
- Department of Chemistry and Biology “A. Zambelli” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology “A. Zambelli” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Daniela Pappalardo
- Dipartimento di Scienze e Tecnologie Università del Sannio Via de Sanctis snc 82100 Benevento Italy
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13
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Gil-Negrete JM, Hevia E. Main group bimetallic partnerships for cooperative catalysis. Chem Sci 2020; 12:1982-1992. [PMID: 34163960 PMCID: PMC8179316 DOI: 10.1039/d0sc05116k] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/16/2020] [Indexed: 11/21/2022] Open
Abstract
Over the past decade s-block metal catalysis has undergone a transformation from being an esoteric curiosity to a well-established and consolidated field towards sustainable synthesis. Earth-abundant metals such as Ca, Mg, and Al have shown eye-opening catalytic performances in key catalytic processes such as hydrosilylation, hydroamination or alkene polymerization. In parallel to these studies, s-block mixed-metal reagents have also been attracting widespread interest from scientists. These bimetallic reagents effect many cornerstone organic transformations, often providing enhanced reactivities and better chemo- and regioselectivities than conventional monometallic reagents. Despite a significant number of synthetic advances to date, most efforts have focused primarily on stoichiometric transformations. Merging these two exciting areas of research, this Perspective Article provides an overview on the emerging concept of s/p-block cooperative catalysis. Showcasing recent contributions from several research groups across the world, the untapped potential that these systems can offer in catalytic transformations is discussed with special emphasis placed on how synergistic effects can operate and the special roles played by each metal in these transformations. Advancing the understanding of the ground rules of s-block cooperative catalysis, the application of these bimetalic systems in a critical selection of catalytic transformations encompassing hydroamination, cyclisation, hydroboration to C-C bond forming processes are presented as well as their uses in important polymerization reactions.
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Affiliation(s)
- Jose M Gil-Negrete
- Department für Chemie und Biochemie, Universität Bern CH3012 Bern Switzerland
| | - Eva Hevia
- Department für Chemie und Biochemie, Universität Bern CH3012 Bern Switzerland
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14
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Synthesis of Biodegradable Polymers: A Review on the Use of Schiff-Base Metal Complexes as Catalysts for the Ring Opening Polymerization (ROP) of Cyclic Esters. Catalysts 2020. [DOI: 10.3390/catal10070800] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
This review describes the recent advances (from 2008 onwards) in the use of Schiff-base metal complexes as catalysts for the ring opening polymerization (ROP) of cyclic esters. The synthesis and structure of the metal complexes, as well as all aspects concerning the polymerization process and the characteristics of the polymers formed, will be discussed.
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15
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Comparison of L-lactide polymerization by using magnesium complexes bearing 2-(arylideneamino)phenolate and 2-((arylimino)methyl)phenolate ligands. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Santulli F, D’Auria I, Boggioni L, Losio S, Proverbio M, Costabile C, Mazzeo M. Bimetallic Aluminum Complexes Bearing Binaphthyl-Based Iminophenolate Ligands as Catalysts for the Synthesis of Polyesters. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00016] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Federica Santulli
- University of Salerno, Department of Chemistry and Biology “A. Zambelli”, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Ilaria D’Auria
- University of Salerno, Department of Chemistry and Biology “A. Zambelli”, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | | | - Simona Losio
- SCITEC-CNR, Via E. Bassini 15, 20133 Milano, Italy
| | | | - Chiara Costabile
- University of Salerno, Department of Chemistry and Biology “A. Zambelli”, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
| | - Mina Mazzeo
- University of Salerno, Department of Chemistry and Biology “A. Zambelli”, Via Giovanni Paolo II, 132, 84084 Fisciano, Salerno, Italy
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17
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García-Valle FM, Muñoz MT, Cuenca T, Milione S, Mosquera ME, Cano J. Fluorinated alkali metal catalysts for the Ring-Opening Polymerization (ROP) of rac-lactide. Effect of the M···F interactions in the polymerization control. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Robertson SD, Uzelac M, Mulvey RE. Alkali-Metal-Mediated Synergistic Effects in Polar Main Group Organometallic Chemistry. Chem Rev 2019; 119:8332-8405. [DOI: 10.1021/acs.chemrev.9b00047] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Stuart D. Robertson
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Marina Uzelac
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Robert E. Mulvey
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
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19
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Chen XL, Wang B, Pan L, Li YS. Homoleptic, bis-ligated magnesium complexes for ring-opening polymerization of lactide and lactones: Synthesis, structure, polymerization behavior and mechanism studies. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiao-Lu Chen
- Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering; Tianjin University; Tianjin 300072 China
| | - Bin Wang
- Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering; Tianjin University; Tianjin 300072 China
| | - Li Pan
- Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering; Tianjin University; Tianjin 300072 China
| | - Yue-Sheng Li
- Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
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20
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Gao J, Zhu D, Zhang W, Solan GA, Ma Y, Sun WH. Recent progress in the application of group 1, 2 & 13 metal complexes as catalysts for the ring opening polymerization of cyclic esters. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00855a] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review focuses on recent developments concerned with the use of well-defined main group complexes as (pre-)catalysts for the ROP of cyclic esters to give aliphatic polyesters; factors influencing catalytic activity, selectivity and polymer properties are all discussed.
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Affiliation(s)
- Jiahao Gao
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Dongzhi Zhu
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment
- Beijing Engineering Research Center of Textile Nanofiber
- School of Materials Science and Engineering
- Beijing Institute of Fashion Technology
- Beijing 100029
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yanping Ma
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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21
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Zhu M, Liu L, Zhang Y, Yu HT, Zhang WX, Xi Z. Selective Transformation of Well-Defined Alkenyllithiums to Alkenylmagnesiums via Transmetalation. Chemistry 2018; 24:3186-3191. [DOI: 10.1002/chem.201704611] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Miaomiao Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
- College of Chemistry and Materials Science; Hebei Normal University; Shijiazhuang 050024 P. R. China
| | - Liang Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Yongliang Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Hai-Tao Yu
- College of Chemistry and Materials Science; Hebei Normal University; Shijiazhuang 050024 P. R. China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of, Ministry of Education, College of Chemistry; Peking University; Beijing 100871 P. R. China
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22
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D'Auria I, Tedesco C, Mazzeo M, Pellecchia C. New homoleptic bis(pyrrolylpyridiylimino) Mg(ii) and Zn(ii) complexes as catalysts for the ring opening polymerization of cyclic esters via an "activated monomer" mechanism. Dalton Trans 2017; 46:12217-12225. [PMID: 28875186 DOI: 10.1039/c7dt02445b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of MgBu2 and ZnEt2 or Zn{N[Si(CH3)3]2}2 with a tridentate monoanionic pyrrolylpyridiylimino [N-,N,N] proligand gave homoleptic species, as exclusive products, in high yields. The complexes were characterized in solution by 1D and 2D NMR analysis and by single crystal X-ray crystallography. The new homoleptic complexes were tested as initiators in the polymerization of ε-caprolactone and lactide in the presence of an exogenous alcohol. For both complexes, the polymerizations proceed via an "activated monomer" mechanism that, in the case of the magnesium complex, was correlated with the coordinative flexibility of the ligands, resulting in extremely high productivities under mild conditions.
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Affiliation(s)
- Ilaria D'Auria
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, via Giovanni Paolo II 132 - 84084, Fisciano, SA, Italy. and Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), via Celso Ulpiani 27 - 70126, Bari, Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, via Giovanni Paolo II 132 - 84084, Fisciano, SA, Italy.
| | - Mina Mazzeo
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, via Giovanni Paolo II 132 - 84084, Fisciano, SA, Italy. and Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), via Celso Ulpiani 27 - 70126, Bari, Italy
| | - Claudio Pellecchia
- Dipartimento di Chimica e Biologia "A. Zambelli", Università di Salerno, via Giovanni Paolo II 132 - 84084, Fisciano, SA, Italy. and Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), via Celso Ulpiani 27 - 70126, Bari, Italy
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23
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Bhattacharjee J, Harinath A, Nayek HP, Sarkar A, Panda TK. Highly Active and Iso-Selective Catalysts for the Ring-Opening Polymerization of Cyclic Esters using Group 2 Metal Initiators. Chemistry 2017; 23:9319-9331. [DOI: 10.1002/chem.201700672] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jayeeta Bhattacharjee
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
| | - Adimulam Harinath
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
| | - Hari Pada Nayek
- Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad; 826004 Jharkhand India
| | - Alok Sarkar
- Momentive Performance Materials Pvt. Ltd. Survey No. 09; Hosur Road Electronic City (West) Bangalore 560100 India
| | - Tarun K. Panda
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
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24
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Ivchenko PV, Shlyakhtin AV, Nifant’ev IE. Ring-opening polymerization of glycolide and rac -lactide, catalyzed by aryloxy magnesium complexes: DFT study of reaction profile and stereocontrol mechanism. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.05.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Chuang WJ, Hsu SP, Chand K, Yu FL, Tsai CL, Tseng YH, Lu YH, Kuo JY, Carey JR, Chen HY, Chen HY, Chiang MY, Hsu SCN. Reactivity Study of Unsymmetrical β-Diketiminato Copper(I) Complexes: Effect of the Chelating Ring. Inorg Chem 2017; 56:2722-2735. [PMID: 28225607 DOI: 10.1021/acs.inorgchem.6b02876] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
β-Diketiminato copper(I) complexes play important roles in bioinspired catalytic chemistry and in applications to the materials industry. However, it has been observed that these complexes are very susceptible to disproportionation. Coordinating solvents or Lewis bases are typically used to prevent disproportionation and to block the coordination sites of the copper(I) center from further decomposition. Here, we incorporate this coordination protection directly into the molecule in order to increase the stability and reactivity of these complexes and to discover new copper(I) binding motifs. Here we describe the synthesis, structural characterization, and reactivity of a series of unsymmetrical N-aryl-N'-alkylpyridyl β-diketiminato copper(I) complexes and discuss the structures and reactivity of these complexes with respect to the length of the pyridyl arm. All of the aforementioned unsymmetrical ß-diketiminato copper(I) complexes bind CO reversibly and are stable to disproportionation. The binding ability of CO and the rate of pyridyl ligand decoordination of these copper(I) complexes are directly related to the competition between the degree of puckering of the chelate system and the steric demands of the N-aryl substituent.
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Affiliation(s)
- Wan-Jung Chuang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Sung-Po Hsu
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University , Taipei 110, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University , Taipei 110, Taiwan
| | - Kuldeep Chand
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Fu-Lun Yu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Cheng-Long Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yu-Hsuan Tseng
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yuh-Hsiu Lu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Jen-Yu Kuo
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - James R Carey
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Applied Chemistry, National University of Kaohsiung , Kaohsiung 804, Taiwan
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Michael Y Chiang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Chemistry, National Sun Yat-Sen University , Kaohsiung 804, Taiwan
| | - Sodio C N Hsu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
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26
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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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27
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Ou HW, Lo KH, Du WT, Lu WY, Chuang WJ, Huang BH, Chen HY, Lin CC. Synthesis of Sodium Complexes Supported with NNO-Tridentate Schiff Base Ligands and Their Applications in the Ring-Opening Polymerization of L-Lactide. Inorg Chem 2016; 55:1423-32. [PMID: 26828572 DOI: 10.1021/acs.inorgchem.5b02043] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of sodium complexes bearing NNO-tridentate Schiff base ligands with an N-pendant arm were synthesized and used as catalysts for the ring-opening polymerization of L-lactide (L-LA). Electronic effects of ancillary ligands coordinated by sodium complexes substantially influence the catalysis, and ligands with electron-donating groups increase the catalytic activity of the sodium complexes for catalyzing L-LA polymerization. In particular, a sodium complex bearing a 4-methoxy group has the highest activity with conversion up to 95% within 30 s at 0 °C and a low polydispersity index of 1.13, whereas the 4-bromo group showed the poorest performance with regard to the catalytic rate of L-LA polymerization in the presence of benzyl alcohol (BnOH). (1)H NMR pulsed-gradient spin-echo diffusion experiments and single-crystal X-ray analyses showed that sodium complexes [L(H)Na(THF)]2 and [L(4-Cl)Na(THF)]2 were dinuclear species in both solution and the solid state. The kinetic results indicated a first-order dependence on each of [[L(4-Cl)Na]2], [l-LA], and [BnOH].
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Affiliation(s)
- Hsiu-Wei Ou
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
| | - Kai-Hsuan Lo
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
| | - Wei-Ting Du
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
| | - Wei-Yi Lu
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
| | - Wan-Jung Chuang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 80708, Taiwan, Republic of China
| | - Bor-Hunn Huang
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 80708, Taiwan, Republic of China
| | - Chu-Chieh Lin
- Department of Chemistry, National Chung Hsing University , Taichung 402, Taiwan, Republic of China
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28
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Nsiri H, Belaid I, Larini P, Thuilliez J, Boisson C, Perrin L. Ethylene–Butadiene Copolymerization by Neodymocene Complexes: A Ligand Structure/Activity/Polymer Microstructure Relationship Based on DFT Calculations. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02317] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hajar Nsiri
- Université Lyon 1, CNRS, INSA, CPE, UMR 5246, ICBMS, ITEMM, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
- Université Lyon 1, CNRS, CPE, UMR 5265, C2P2, CPP, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
| | - Islem Belaid
- Université Lyon 1, CNRS, CPE, UMR 5265, C2P2, CPP, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
| | - Paolo Larini
- Université Lyon 1, CNRS, INSA, CPE, UMR 5246, ICBMS, ITEMM, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
| | - Julien Thuilliez
- Manufacture Michelin, 23 place des Carmes, 63040 Clermont-Ferrand, France
| | - Christophe Boisson
- Université Lyon 1, CNRS, CPE, UMR 5265, C2P2, CPP, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
| | - Lionel Perrin
- Université Lyon 1, CNRS, INSA, CPE, UMR 5246, ICBMS, ITEMM, 43 Bd du 11 novembre 1918, CEDEX 69622 Villeurbanne, France
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29
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Ribeiro R, Ruivo R, Nsiri H, Norsic S, D’Agosto F, Perrin L, Boisson C. Deciphering the Mechanism of Coordinative Chain Transfer Polymerization of Ethylene Using Neodymocene Catalysts and Dialkylmagnesium. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02316] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rodolfo Ribeiro
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Rui Ruivo
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Hajar Nsiri
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
- Interface Theory/Experiment: Mechanism & Modeling (ITEMM), ICBMS, UMR 5246-CNRS, Bat. 308-Curien (CPE Lyon), Université Claude Bernard Lyon 1, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Sébastien Norsic
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Franck D’Agosto
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
| | - Lionel Perrin
- Interface Theory/Experiment: Mechanism & Modeling (ITEMM), ICBMS, UMR 5246-CNRS, Bat. 308-Curien (CPE Lyon), Université Claude Bernard Lyon 1, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Christophe Boisson
- Université de Lyon, Université Lyon 1, CPE Lyon, CNRS, UMR 5265, C2P2 (Chemistry, Catalysis, Polymers & Processes), Bat. 308F, 43 Bd du 11 Novembre 1918, 69616 Villeurbanne, France
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30
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Gallegos C, Camacho R, Valiente M, Cuenca T, Cano J. Cyclopentadienyl-based Mg complexes in the intramolecular hydroamination of aminoalkenes: mechanistic evidence for cationic versus neutral magnesium derivatives. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01040c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Mechanistic evidence in the catalytic hydroamination of aminoalkenes for a cationic magnesium derivative.
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Affiliation(s)
- Carlos Gallegos
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Ruth Camacho
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Mercedes Valiente
- Dpto de Química Física
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Tomás Cuenca
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
| | - Jesús Cano
- Dpto de Química Inorgánica
- Universidad de Alcalá
- 28871 Alcalá de Henares
- Spain
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31
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Chuang WJ, Chen HY, Chen WT, Chang HY, Chiang MY, Chen HY, Hsu SCN. Steric and chelating ring concerns on the l-lactide polymerization by asymmetric β-diketiminato zinc complexes. RSC Adv 2016. [DOI: 10.1039/c6ra07453g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Asymmetric β-diketiminato zinc complexes were investigated in l-lactide polymerization. The catalytic rate depended heavily on the N-aryl substituents.
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Affiliation(s)
- Wan-Jung Chuang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
| | - Wei-Ting Chen
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
| | - Heng-Yi Chang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
| | - Michael Y. Chiang
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
- Department of Chemistry
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
| | - Sodio C. N. Hsu
- Department of Medicinal and Applied Chemistry
- Kaohsiung Medical University
- Kaohsiung 807
- Taiwan
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32
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Char J, Brulé E, Gros PC, Rager MN, Guérineau V, Thomas CM. Synthesis of heterotactic PLA from rac-lactide using hetero-bimetallic Mg/Zn–Li systems. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.02.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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33
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Gallegos C, Tabernero V, Mosquera MEG, Cuenca T, Cano J. Comparative Study of Lactide Polymerization with Lithium, Sodium, Potassium, Magnesium, Calcium, and Zinc Azonaphthoxide Complexes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500818] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Muñoz MT, Cuenca T, Mosquera MEG. Heterometallic aluminates: alkali metals trapped by an aluminium aryloxide claw. Dalton Trans 2015; 43:14377-85. [PMID: 24965205 DOI: 10.1039/c4dt00952e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A series of heterometallic aluminium-alkali metal species [AlMMe2{2,6-(MeO)2C6H3O}2]n have been isolated for lithium, sodium and potassium. These compounds can be generated by the reaction of [AlMe2{2,6-(MeO)2C6H3O}]2 with the metallated phenol [M{2,6-(MeO)2C6H3O}]n or through the reaction of the mixture of AlMe3 and the appropriate alkali metal alkyl base with two equivalents of 2,6-dimethoxyphenol. In the heterometallic species obtained, the {AlMe2{2,6-(MeO)2C6H3O}2}(-) moiety is observed and could be described as a claw which fixes the alkali ion by the phenoxide oxygen atoms while the methoxy groups help to stabilize their coordination sphere. All compounds have been characterized by NMR spectroscopy and X-ray diffraction methods. Catalytic studies reveal that these compounds are active in ring-opening polymerization of L-lactide.
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Affiliation(s)
- M Teresa Muñoz
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain.
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35
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García-Valle FM, Estivill R, Gallegos C, Cuenca T, Mosquera MEG, Tabernero V, Cano J. Metal and Ligand-Substituent Effects in the Immortal Polymerization of rac-Lactide with Li, Na, and K Phenoxo-imine Complexes. Organometallics 2015. [DOI: 10.1021/om501000b] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Francisco M. García-Valle
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Robert Estivill
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Carlos Gallegos
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Tomás Cuenca
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Marta E. G. Mosquera
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Vanessa Tabernero
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
| | - Jesús Cano
- Departamento de Química
Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares, Spain
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36
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Zaragoza-Calero S, Francos J, Kennedy AR, O'Hara CT. Solid state and solution studies of lithium tris(n-butyl)magnesiates stabilised by Lewis donors. Dalton Trans 2015; 44:7258-67. [DOI: 10.1039/c5dt00435g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Donor complexes of the synthetically important lithium magnesiate LiMg(nBu)3 have been prepared and characterised.
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Affiliation(s)
| | - Javier Francos
- WestCHEM
- University of Strathclyde
- Department of Pure and Applied Chemistry
- Glasgow
- UK
| | - Alan R. Kennedy
- WestCHEM
- University of Strathclyde
- Department of Pure and Applied Chemistry
- Glasgow
- UK
| | - Charles T. O'Hara
- WestCHEM
- University of Strathclyde
- Department of Pure and Applied Chemistry
- Glasgow
- UK
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37
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Bakewell C, Fateh-Iravani G, Beh DW, Myers D, Tabthong S, Hormnirun P, White AJP, Long N, Williams CK. Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide. Dalton Trans 2015; 44:12326-37. [DOI: 10.1039/c5dt00192g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The preparation, characterization and properties of a series of 8-hydroxy quinolinolate complexes of Ti(iv), Al(iii) and Zn(ii) are presented. The complexes are active initiators for rac-lactide polymerizations: their performances are compared.
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Affiliation(s)
- Clare Bakewell
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | | | - Daniel W. Beh
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | - Dominic Myers
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | - Sittichoke Tabthong
- Department of Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
- Thailand
| | - Pimpa Hormnirun
- Department of Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
- Thailand
| | | | - Nicholas Long
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
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38
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Zhang J, Xiong J, Sun Y, Tang N, Wu J. Highly Iso-Selective and Active Catalysts of Sodium and Potassium Monophenoxides Capped by a Crown Ether for the Ring-Opening Polymerization of rac-Lactide. Macromolecules 2014. [DOI: 10.1021/ma502000y] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jinjin Zhang
- State Key
Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jiao Xiong
- State Key
Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yangyang Sun
- State Key
Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ning Tang
- State Key
Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jincai Wu
- State Key
Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, College
of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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