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N-heterocyclic carbenes with three and six fluorous ponytails and their highly fluorophilic Rh and Ir complexes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Poly(imidazolium) Carbosilane Dendrimers: Synthesis, Catalytic Activity in Redox Esterification of α,β-Unsaturated Aldehydes and Recycling via Organic Solvent Nanofiltration. Catalysts 2021. [DOI: 10.3390/catal11111317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Three series of poly(ionic) carbosilane dendrimers peripherally functionalized with imidazolium groups substituted on N-3 with methyl, isopropyl and 2,6-diisopropylphenyl (Dipp) were prepared up to the 3rd generation together with model monovalent imidazolium iodides and used as N-heterocyclic carbene (NHC) precursors. Catalytic activity of model and dendritic NHCs generated in situ by deprotonation with DBU was tested in redox esterification of α,β-unsaturated aldehydes and the influence of substitution, dendrimer generation, temperature and substrate structure on the reaction outcome was evaluated. Dipp substituted NHCs showed high activity and selectivity in the reaction with primary alcohols. Effectiveness of organic solvent nanofiltration for the recycling of dendritic NHCs was demonstrated on the 1st generation Dipp substituted catalyst in model redox esterification of cinnamaldehyde with benzyl alcohol. A marked increase in both activity and selectivity in the first four reaction runs was observed and this improved performance was preserved in the following catalytic cycles.
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Červenková Šťastná L, Bílková V, Cézová T, Cuřínová P, Karban J, Čermák J, Krupková A, Strašák T. Imidazolium Based Fluorous N‐Heterocyclic Carbenes as Effective and Recyclable Organocatalysts for Redox Esterification. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lucie Červenková Šťastná
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
| | - Veronika Bílková
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
| | - Tereza Cézová
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
| | - Petra Cuřínová
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
| | - Jindřich Karban
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
| | - Jan Čermák
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
| | - Alena Krupková
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
| | - Tomáš Strašák
- Institute of Chemical Process Fundamentals The Czech Academy of Sciences Rozvojová 135 165 02 Prague Czech Republic
- J. E. Purkyně University České mládeže 8 400 96 Ústí nad Labem Czech Republic
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Honda M, Ashizawa K, Kunimoto KK, Segi M. Synthesis of novel fluorous pyridinium ionic liquids. HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mitsunori Honda
- Division of Material Chemistry; Graduate School of Natural Science and Technology; Kanazawa University; Kanazawa Ishikawa Japan
| | - Kohei Ashizawa
- Division of Material Chemistry; Graduate School of Natural Science and Technology; Kanazawa University; Kanazawa Ishikawa Japan
| | - Ko-Ki Kunimoto
- Division of Material Chemistry; Graduate School of Natural Science and Technology; Kanazawa University; Kanazawa Ishikawa Japan
| | - Masahito Segi
- Division of Material Chemistry; Graduate School of Natural Science and Technology; Kanazawa University; Kanazawa Ishikawa Japan
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Honda M, Iwamoto T, Ohnogi T, Kunimoto KK, Segi M. Synthesis of fluorous pyrrolidinium and piperidinium ionic liquids. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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