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Ayuso-Carrillo J, Fina F, Galleposo EC, Ferreira RR, Mondal PK, Ward BD, Bonifazi D. One-Step Catalyst-Transfer Macrocyclization: Expanding the Chemical Space of Azaparacyclophanes. J Am Chem Soc 2024; 146:16440-16457. [PMID: 38848549 PMCID: PMC11191698 DOI: 10.1021/jacs.4c02319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/09/2024]
Abstract
In this paper, we report on a one-step catalyst-transfer macrocyclization (CTM) reaction, based on the Pd-catalyzed Buchwald-Hartwig cross-coupling reaction, selectively affording only cyclic structures. This route offers a versatile and efficient approach to synthesize aza[1n]paracyclophanes (APCs) featuring diverse functionalities and lumens. The method operates at mild reaction temperatures (40 °C) and short reaction times (∼2 h), delivering excellent isolated yields (>75% macrocycles) and up to 30% of a 6-membered cyclophane, all under nonhigh-dilution concentrations (35-350 mM). Structural insights into APCs reveal variations in product distribution based on different endocyclic substituents, with steric properties of exocyclic substituents having minimal influence on the macrocyclization. Aryl-type endocyclic substituents predominantly yield 6-membered macrocycles, while polycyclic aromatic units such as fluorene and carbazole favor 4-membered species. Experimental and computational studies support a proposed mechanism of ring-walking catalyst transfer that promotes the macrocycle formation. It has been found that the macrocyclization is driven by the formation of cyclic conformers during the oligomerization step favoring an intramolecular C-N bond formation that, depending on the cycle size, hinges on either preorganization effect or kinetic increase of the reductive elimination step or a combination of the two. The CTM process exhibits a "living" behavior, facilitating sequential synthesis of other macrocycles by introducing relevant monomers, thus providing a practical synthetic platform for chemical libraries. Notably, CTM operates both under diluted and concentrated regimes, offering scalability potential, unlike typical macrocyclization reactions usually operating in the 0.1-1 mM range.
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Affiliation(s)
- Josue Ayuso-Carrillo
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, Vienna A-1090, Austria
| | - Federica Fina
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, Vienna A-1090, Austria
| | - El Czar Galleposo
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, Vienna A-1090, Austria
| | - Rúben R. Ferreira
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, Vienna A-1090, Austria
| | - Pradip Kumar Mondal
- Elettra
Sincrotrone Trieste S.C.p.A., Strada Statale 14−km 163, 5 in Area Science
Park, Basovizza, Trieste 34149, Italy
| | - Benjamin D. Ward
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K.
| | - Davide Bonifazi
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, Vienna A-1090, Austria
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2
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Larson NG, Norman JP, Neufeldt SR. Mechanistic Origin of Ligand Effects on Exhaustive Functionalization During Pd-Catalyzed Cross-Coupling of Dihaloarenes. ACS Catal 2024; 14:7127-7135. [PMID: 38911468 PMCID: PMC11192547 DOI: 10.1021/acscatal.4c00646] [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] [Indexed: 06/25/2024]
Abstract
We describe a detailed investigation into why bulky ligands-those that enable catalysis at "12e -" Pd0-tend to promote overfunctionalization during Pd-catalyzed cross-couplings of dihalogenated substrates. After one cross-coupling event takes place, PdL initially remains coordinated to the π system of the nascent product. Selectivity for mono- vs. difunctionalization arises from the relative rates of π-decomplexation versus a second oxidative addition. Under the Suzuki coupling conditions in this work, direct dissociation of 12e - PdL from the π-complex cannot outcompete oxidative addition. Instead, Pd must be displaced from the π-complex as 14e - PdL(L') by a second incoming ligand L'. The incoming ligand is another molecule of dichloroarene if the reaction conditions do not include π-coordinating solvents or additives. More overfunctionalization tends to result when increased ligand or substrate sterics raises the energy of the bimolecular transition state for separating 14e - PdL(L') from the mono-cross-coupled product. This work has practical implications for optimizing selectivity in cross-couplings involving multiple halogens. For example, we demonstrate that small coordinating additives like DMSO can largely suppress overfunctionalization and that precatalyst structure can also impact selectivity.
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Affiliation(s)
- Nathaniel G. Larson
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, United States
| | - Jacob P. Norman
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, United States
| | - Sharon R. Neufeldt
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59717, United States
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3
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Tokita Y, Uchida T, Kamigawara T, Hoka K, Nitto R, Ohta Y, Yokozawa T. Tandem Kumada-Tamao catalyst-transfer condensation polymerization and Suzuki-Miyaura coupling for the synthesis of end-functionalized poly(3-hexylthiophene). Chem Commun (Camb) 2023; 59:13139-13142. [PMID: 37811687 DOI: 10.1039/d3cc04100j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Successive Kumada-Tamao catalyst-transfer condensation polymerization of 2-bromo-5-chloromagnesio-3-hexylthiophene and Suzuki-Miyaura end-functionalization with pinacol arylboronate in one pot afforded poly(3-hexylthiophene) (P3HT) with a base-sensitive functional group at both ends. The use of poly(methyl methacrylate) (PMMA) bearing a boronic acid ester moiety at one end enabled one-pot synthesis of PMMA-b-P3HT-b-PMMA triblock copolymer.
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Affiliation(s)
- Yu Tokita
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Tatsuya Uchida
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Takeru Kamigawara
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Kenta Hoka
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Reo Nitto
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Yoshihiro Ohta
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
| | - Tsutomu Yokozawa
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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4
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Li L, Zhan H, Chen S, Zhao Q, Peng J. Interrogating the Effect of Block Sequence on Cocrystallization, Microphase Separation, and Charge Transport in All-Conjugated Triblock Copolymers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lixin Li
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Hao Zhan
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Shuwen Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Qingqing Zhao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
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5
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Dau H, Jones GR, Tsogtgerel E, Nguyen D, Keyes A, Liu YS, Rauf H, Ordonez E, Puchelle V, Basbug Alhan H, Zhao C, Harth E. Linear Block Copolymer Synthesis. Chem Rev 2022; 122:14471-14553. [PMID: 35960550 DOI: 10.1021/acs.chemrev.2c00189] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Block copolymers form the basis of the most ubiquitous materials such as thermoplastic elastomers, bridge interphases in polymer blends, and are fundamental for the development of high-performance materials. The driving force to further advance these materials is the accessibility of block copolymers, which have a wide variety in composition, functional group content, and precision of their structure. To advance and broaden the application of block copolymers will depend on the nature of combined segmented blocks, guided through the combination of polymerization techniques to reach a high versatility in block copolymer architecture and function. This review provides the most comprehensive overview of techniques to prepare linear block copolymers and is intended to serve as a guideline on how polymerization techniques can work together to result in desired block combinations. As the review will give an account of the relevant procedures and access areas, the sections will include orthogonal approaches or sequentially combined polymerization techniques, which increases the synthetic options for these materials.
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Affiliation(s)
- Huong Dau
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Glen R Jones
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Enkhjargal Tsogtgerel
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Dung Nguyen
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Anthony Keyes
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Yu-Sheng Liu
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Hasaan Rauf
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Estela Ordonez
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Valentin Puchelle
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Hatice Basbug Alhan
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Chenying Zhao
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
| | - Eva Harth
- Department of Chemistry, University of Houston, Center for Excellence in Chemistry, CEPC, Houston, Texas 77004, United States
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6
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Kim H, Lee J, Kim T, Cho M, Choi T. Precision Synthesis of Various Low‐Bandgap Donor–Acceptor Alternating Conjugated Polymers via Living Suzuki–Miyaura Catalyst‐Transfer Polymerization. Angew Chem Int Ed Engl 2022; 61:e202205828. [DOI: 10.1002/anie.202205828] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Hwangseok Kim
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Jaeho Lee
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Taehyun Kim
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Minyoung Cho
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Tae‐Lim Choi
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
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7
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Kim H, Lee J, Kim T, Cho M, Choi T. Precision Synthesis of Various Low‐Bandgap Donor–Acceptor Alternating Conjugated Polymers via Living Suzuki–Miyaura Catalyst‐Transfer Polymerization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hwangseok Kim
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Jaeho Lee
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Taehyun Kim
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Minyoung Cho
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
| | - Tae‐Lim Choi
- Department of Chemistry Seoul National University Seoul 08826 Republic of Korea
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8
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Kawakami M, Schulz KHG, Varni A, Tormena CF, Gil RR, Noonan K. Statistical Copolymers of Thiophene-3-Carboxylates and Selenophene-3-Carboxylates; 77Se NMR as a Tool to Examine Copolymer Sequence in Selenophene-Based Conjugated Polymers. Polym Chem 2022. [DOI: 10.1039/d2py00777k] [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
Herein, we demonstrate that homopolymerization and statistical copolymerization of 2-ethylhexyl thiophene-3-carboxylate and 2-ethylhexyl selenophene-3-carboxylate monomers is possible via Suzuki-Miyaura cross-coupling. A commercially available palladium catalyst ([1,3-bis(2,6-di-3-pentylphenyl)imidazol-2-ylidene](3-chloropyridyl)dichloropalladium(II) or PEPPSI-IPent) was employed...
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9
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Cheng S, Zhao R, Seferos DS. Precision Synthesis of Conjugated Polymers Using the Kumada Methodology. Acc Chem Res 2021; 54:4203-4214. [PMID: 34726058 DOI: 10.1021/acs.accounts.1c00556] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Since the discovery of conductive poly(acetylene), the study of conjugated polymers has remained an active and interdisciplinary frontier between polymer chemistry, polymer physics, computation, and device engineering. One of the ultimate goals of polymer science is to reliably synthesize structures, similar to small molecule synthesis. Kumada catalyst-transfer polymerization (KCTP) is a powerful tool for synthesizing conjugated polymers with predictable molecular weights, narrow dispersities, specific end groups, and complex backbone architectures. However, expanding the monomer scope beyond the well-studied 3-alkylthiophenes to include electron-deficient and complex heterocycles has been difficult. Revisiting the successful applications of KCTP can help us gain new insight into the CTP mechanisms and thus inspire breakthroughs in the controlled polymerization of challenging π-conjugated monomers.In this Account, we highlight our efforts over the past decade to achieve controlled synthesis of homopolymers (p-type and n-type), copolymers (diblock and statistical), and monodisperse high oligomers. We first give a brief introduction of the mechanism and state-of-the-art of KCTP. Since the extent of polymerization control is determined by steric and electronic effects of both the catalyst and monomer, the polymerization can be optimized by modifying monomer and catalyst structures, as well as finding a well-matched monomer-catalyst system. We discuss the effects of side-chain steric hindrance and halogens in the context of heavy atom substituted monomers. By moving the side-chain branch point one carbon atom away from the heterocycle to alleviate steric crowding and stabilize the catalyst resting state, we were able to successfully control the polymerization of new tellurophene monomers. Inspired by innocent role of the sterically encumbered 2-transmetalated 3-alkylthiophene monomer, we introduce the treatment of hygroscopic monomers with a bulky Grignard compound as a water-scavenger for the improved synthesis of water-soluble conjugated polymers. For challenging electron-deficient monomers, we discuss the design of new Ni(II)diimine catalysts with electron-donating character which enhance the stability of the association complex between the catalyst and the growing polymer chain, resulting in the quasi-living synthesis of n-type polymers. Beyond n-type homopolymers, the Ni(II)diimine catalysts are also capable of producing electron-rich and electron-deficient diblock and statistical copolymers. We discuss how density functional theory (DFT) calculations elucidate the role of catalyst steric and electronic effects in controlling the synthesis of π-conjugated polymers. Moreover, we demonstrate the synthesis of monodisperse high oligomers by temperature cycling, which takes full advantage of the unique character of KCTP in that it proceeds through distinct intermediates that are not reactive. The insight we gained thus far leads to the first example of isolated living conjugated polymer chains prepared by a standard KCTP procedure, with general applicability to different monomers and catalytic systems. In summarizing a decade of innovation in KCTP, we hope this Account will inspire future development in the field to overcome key challenges including the controlled synthesis of electron-deficient heterocycles, complex and high-performance systems, and degradable and recyclable materials as well as cutting-edge catalyst design.
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Affiliation(s)
- Susan Cheng
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Ruyan Zhao
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dwight S. Seferos
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
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10
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Terayama K, Liu CW, Higashihara T. Catalyst-transfer system in stoichiometry-independent AA+BB-type Migita–Kosugi–Stille coupling polycondensation using ester-functionalized dibromo monomer. Polym J 2021. [DOI: 10.1038/s41428-021-00571-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Tokita Y, Katoh M, Kosaka K, Ohta Y, Yokozawa T. Precision synthesis of a fluorene-thiophene alternating copolymer by means of the Suzuki–Miyaura catalyst-transfer condensation polymerization: the importance of the position of an alkyl substituent on thiophene of the biaryl monomer to suppress disproportionation. Polym Chem 2021. [DOI: 10.1039/d1py01184g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Suzuki–Miyaura coupling polymerization of PinB-F8T(3)-Br was accompanied by disproportionation, whereas that of PinB-F8T(4)-Br proceeded in a chain-growth polymerization manner to afford a well-defined fluorene-thiophene alternating copolymer.
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Affiliation(s)
- Yu Tokita
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Masaru Katoh
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Kentaro Kosaka
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Yoshihiro Ohta
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
| | - Tsutomu Yokozawa
- Department of Materials and Life Chemistry, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan
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12
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Bautista MV, Varni AJ, Ayuso-Carrillo J, Carson MC, Noonan KJT. Pairing Suzuki–Miyaura cross-coupling and catalyst transfer polymerization. Polym Chem 2021. [DOI: 10.1039/d0py01507e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Borylation strategies to make AB Suzuki–Miyaura monomers for use in catalyst-transfer polymerization with nickel or palladium catalysts.
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13
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Pollit AA, Lough AJ, Seferos DS. Examining the Spin State and Redox Chemistry of Ni(Diimine) Catalysts during the Synthesis of π‐Conjugated Polymers. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000321] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Adam A. Pollit
- Department of Chemistry University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
| | - Alan J. Lough
- Department of Chemistry University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
| | - Dwight S. Seferos
- Department of Chemistry University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
- University of Toronto 200 College Street Toronto ON M5S 3E5 Canada
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14
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Malig TC, Yunker LPE, Steiner S, Hein JE. Online High-Performance Liquid Chromatography Analysis of Buchwald–Hartwig Aminations from within an Inert Environment. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Thomas C. Malig
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Lars P. E. Yunker
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Sebastian Steiner
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jason E. Hein
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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15
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Jarrett-Wilkins CN, Pollit AA, Seferos DS. Polymerization Catalysts Take a Walk on the Wild Side. TRENDS IN CHEMISTRY 2020. [DOI: 10.1016/j.trechm.2020.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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16
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Pollit AA, Ye S, Seferos DS. Elucidating the Role of Catalyst Steric and Electronic Effects in Controlling the Synthesis of π-Conjugated Polymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02098] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Adam A. Pollit
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Shuyang Ye
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dwight S. Seferos
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
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17
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Insights in the Ni-thiophene association in the synthesis of thiophene-para-phenylene block copolymers via Kumada catalyst transfer condensative polymerization. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Buenaflor J, Sommerville P, Qian H, Luscombe C. Investigation of Bimetallic Nickel Catalysts in Catalyst‐Transfer Polymerization of π‐Conjugated Polymers. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jeffrey Buenaflor
- Department of Chemistry University of Washington 36 Bagley Hall, Box 351700 Seattle WA 98195‐1700 USA
| | - Parker Sommerville
- Department of Chemistry University of Washington 36 Bagley Hall, Box 351700 Seattle WA 98195‐1700 USA
| | - Hang Qian
- Department of Materials Science and Engineering University of Washington 302 Roberts Hall, Box 352120 Seattle WA 98195‐2120 USA
| | - Christine Luscombe
- Department of Materials Science and Engineering University of Washington 302 Roberts Hall, Box 352120 Seattle WA 98195‐2120 USA
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19
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Gan W, Cao X, Shi Y, Gao H. Chain‐growth polymerization of azide–alkyne difunctional monomer: Synthesis of star polymer with linear polytriazole arms from a core. JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1002/pola.29440] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Weiping Gan
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556
| | - Xiaosong Cao
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556
| | - Yi Shi
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556
| | - Haifeng Gao
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556
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20
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Leone AK, Mueller EA, McNeil AJ. The History of Palladium-Catalyzed Cross-Couplings Should Inspire the Future of Catalyst-Transfer Polymerization. J Am Chem Soc 2018; 140:15126-15139. [DOI: 10.1021/jacs.8b09103] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Amanda K. Leone
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Emily A. Mueller
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Anne J. McNeil
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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21
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He W, Patrick BO, Kennepohl P. Identifying the missing link in catalyst transfer polymerization. Nat Commun 2018; 9:3866. [PMID: 30250037 PMCID: PMC6155128 DOI: 10.1038/s41467-018-06324-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 08/30/2018] [Indexed: 11/18/2022] Open
Abstract
Nickel-catalyzed catalyst transfer polycondensation (CTP) of thiophenes is an efficient strategy for the controlled synthesis of polythiophenes. However, a detailed view of its reaction mechanism has remained elusive with unresolved questions regarding the geometry and bonding of critical Ni(0) thiophene intermediates. Herein, we provide experimental and computational evidence of structurally characterized square planar η2-Ni(0)-thiophene species and their relevance to the mechanism of CTP. These results confirm the viability of C,C-η2 bound intermediates in CTP of thiophenes, providing an electronic rationale for the stability of such species, and thus that such processes can proceed as living polymerizations. We further show that C,S-κ2 species may also be relevant in nickel-catalyzed CTP of thiophenes, providing new avenues for exploitation and optimization.
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Affiliation(s)
- Weiying He
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Brian O Patrick
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Pierre Kennepohl
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada.
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22
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Nojima M, Kamigawara T, Ohta Y, Yokozawa T. Catalyst‐Transfer Suzuki–Miyaura Condensation Polymerization of Stilbene Monomer: Different Polymerization Behavior Depending on Halide and Aryl Group of ArPd(tBu3P)X Initiator. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masataka Nojima
- Department of Materials and Life ChemistryKanagawa University, RokkakubashiKanagawa‐ku Yokohama 221‐8686 Japan
| | - Takeru Kamigawara
- Department of Materials and Life ChemistryKanagawa University, RokkakubashiKanagawa‐ku Yokohama 221‐8686 Japan
| | - Yoshihiro Ohta
- Department of Materials and Life ChemistryKanagawa University, RokkakubashiKanagawa‐ku Yokohama 221‐8686 Japan
| | - Tsutomu Yokozawa
- Department of Materials and Life ChemistryKanagawa University, RokkakubashiKanagawa‐ku Yokohama 221‐8686 Japan
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23
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Leone AK, Goldberg PK, McNeil AJ. Ring-Walking in Catalyst-Transfer Polymerization. J Am Chem Soc 2018; 140:7846-7850. [DOI: 10.1021/jacs.8b02469] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Amanda K. Leone
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Peter K. Goldberg
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | - Anne J. McNeil
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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24
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Grisorio R, Suranna GP. Impact of Precatalyst Activation on Suzuki-Miyaura Catalyst-Transfer Polymerizations: New Mechanistic Scenarios for Pre-transmetalation Events. ACS Macro Lett 2017; 6:1251-1256. [PMID: 35650779 DOI: 10.1021/acsmacrolett.7b00696] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The relevance of LnPdX2 precatalyst activation on the Suzuki-Miyaura reaction course was investigated in the case of catalyst-transfer polymerizations. A catalytic study, backed up by theoretical calculations, allowed to ascertain the coexistence of a neutral and an anionic mechanistic pathways in the precatalyst activation, in which the bulky tBu3P external ligand plays a crucial role. The fine-tuning of the catalytic conditions can steer the activation step toward the anionic pathway, leading to the full control over the polymerization course. While providing insights and perspectives into the catalyst-transfer polymerizations, these results uncover unexplored scenarios for the pre-transmetalation events of Suzuki-Miyaura reactions contributing to its full understanding.
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Affiliation(s)
- Roberto Grisorio
- DICATECh − Dipartimento
di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, via Orabona, 4, I-70125 Bari, Italy
- CNR-NANOTEC − Istituto di Nanotecnologia, Polo di Nanotecnologia
c/o Campus Ecotekne, via
Monteroni, 73100 Lecce, Italy
| | - Gian Paolo Suranna
- DICATECh − Dipartimento
di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, via Orabona, 4, I-70125 Bari, Italy
- CNR-NANOTEC − Istituto di Nanotecnologia, Polo di Nanotecnologia
c/o Campus Ecotekne, via
Monteroni, 73100 Lecce, Italy
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