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Ďurina L, Ďurinová A, Trejtnar F, Janotka Ľ, Messingerová L, Doháňošová J, Moncol J, Fischer R. Highly stereocontrolled total synthesis of racemic codonopsinol B through isoxazolidine-4,5-diol vinylation. Beilstein J Org Chem 2021; 17:2781-2786. [PMID: 34900008 PMCID: PMC8630432 DOI: 10.3762/bjoc.17.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 11/15/2021] [Indexed: 11/23/2022] Open
Abstract
A new highly diastereoselective synthesis of the polyhydroxylated pyrrolidine alkaloid (±)-codonopsinol B and its N-nor-methyl analogue, starting from achiral materials, is presented. The strategy relies on the trans-stereoselective epoxidation of 2,3-dihydroisoxazole with in situ-generated DMDO, the syn-selective α-chelation-controlled addition of vinyl-MgBr/CeCl3 to the isoxazolidine-4,5-diol intermediate, and the substrate-directed epoxidation of the terminal double bond of the corresponding γ-amino-α,β-diol with aqueous hydrogen peroxide catalyzed by phosphotungstic heteropoly acid. Each of the key reactions proceeded with an excellent diastereoselectivity (dr > 95:5). (±)-Codonopsinol B was prepared in 10 steps with overall 8.4% yield. The antiproliferative effect of (±)-codonopsinol B and its N-nor-methyl analogue was evaluated using several cell line models.
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Affiliation(s)
- Lukáš Ďurina
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Anna Ďurinová
- Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - František Trejtnar
- Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic
| | - Ľuboš Janotka
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava 4, Slovak Republic
| | - Lucia Messingerová
- Institute of Molecular Physiology and Genetics, Centre of Biosciences, Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava 4, Slovak Republic
- Institute of Biochemistry and Microbiology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovak Republic
| | - Jana Doháňošová
- Central Laboratories, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Ján Moncol
- Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
| | - Róbert Fischer
- Institute of Organic Chemistry, Catalysis and Petrochemistry, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovak Republic
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Mokary Yazdely T, Ghorbanloo M, Hosseini-Monfared H. An amphiphilic manganese porphyrin-paired ionic copolymer: a highly efficient biphasic transfer catalyst for the selective oxidation of olefins with O2 and TBHP. NEW J CHEM 2019. [DOI: 10.1039/c9nj02459j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel amphiphilic manganese porphyrin-paired ionic copolymer, {ADA-INA-[Mn(TPPS)(OAc)]}n, was prepared by the self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species.
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Affiliation(s)
| | - Massomeh Ghorbanloo
- Department of Chemistry
- Faculty of Science
- University of Zanjan
- 45371-38791 Zanjan
- Iran
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3
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Symeonidis TS, Athanasoulis A, Ishii R, Uozumi Y, Yamada YMA, Lykakis IN. Photocatalytic Aerobic Oxidation of Alkenes into Epoxides or Chlorohydrins Promoted by a Polymer-Supported Decatungstate Catalyst. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700079] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Theodoros S. Symeonidis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
| | - Alexandros Athanasoulis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
| | - Rikako Ishii
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Yasuhiro Uozumi
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Yoichi M. A. Yamada
- RIKEN Center for Sustainable Resource Science, Hirosawa, Wako; Saitama 351-0198 Japan
| | - Ioannis N. Lykakis
- Department of Chemistry, Aristotle University of Thessaloniki; University Campus; 54124 Thessaloniki Greece
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Hamamoto H. Development and application of new oxidation systems utilizing oxometalate catalysts. Chem Pharm Bull (Tokyo) 2012; 60:799-817. [PMID: 22790811 DOI: 10.1248/cpb.c112001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This review describes our recent efforts in the development and application of new oxidation systems utilizing oxometalate catalysts. The novel use of heteropoly acid (HPA), an acidic oxometalate catalyst, in hypervalent iodine-mediated oxidations provided an effective strategy to generate cation radical species that enables a variety of direct C-H functionalizations of aromatic compounds. This strategy brought a facile biaryl synthesis and new spirodienone syntheses in aromatic oxidation chemistry. Moreover, this strategy opens up a facile synthetic route to morphinandienone alkaloids. On the other hand, the use of oxometalate catalyst together with poly(N-isopropylacrylamide) (PNIPAAm)-based polymer in the development of new solid-phase catalyst provided a novel reaction system in water. Due to the characteristic temperature-responsive intelligence of PNIPAAm, this reaction system brought a remarkable acceleration of the reactivity and ease of catalyst recovering in catalytic oxidation that uses hydrogen peroxide or oxygen gas (O<inf>2</inf>) as primary oxidant. In addition, the recovered solid-phase catalyst could be used for consecutive reactions without any significant loss of its catalytic efficacy.
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Affiliation(s)
- Hiromi Hamamoto
- School of Pharmaceutical Sciences, Kinki University, 3–4–1 Kowakae, Higashi-Osaka, Japan.
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Chen B, Li F, Huang Z, Lu T, Yuan Y, Yu J, Yuan G. Self-assembled nanostructures of Ag6[PV3Mo9O40] with N-donor ligands and their catalytic activity. RSC Adv 2012. [DOI: 10.1039/c2ra21858e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Gao B, Wang L, Du R, Li Y. Synthesis of N-butylphthalimide catalyzed by quaternary phosphonium salt-type triphase catalysts based on cross-linked polystyrene microspheres. INT J CHEM KINET 2011. [DOI: 10.1002/kin.20579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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7
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Ohta H, Uozumi Y, Yamada YMA. Highly Active Copper-Network Catalyst for the Direct Aldol Reaction. Chem Asian J 2011; 6:2545-9. [DOI: 10.1002/asia.201100284] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Indexed: 11/06/2022]
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8
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Liquid-Phase Selective Oxidation by Multimetallic Active Sites of Polyoxometalate-Based Molecular Catalysts. TOP ORGANOMETAL CHEM 2011. [DOI: 10.1007/3418_2011_3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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9
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Zhao W, Ma B, Ding Y, Qiu W. Immobilization of heteropolytungstate on functionalized KIT-1 mesoporous silica: catalyst for alkene epoxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2010. [DOI: 10.1007/s11144-010-0269-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Yamada YMA, Jin CK, Uozumi Y. H2O2-Oxidation of Alcohols Promoted by Polymeric Phosphotungstate Catalysts. Org Lett 2010; 12:4540-3. [DOI: 10.1021/ol101839m] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yoichi M. A. Yamada
- RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan, and Institute for Molecular Science, Okazaki, Aichi 444-8787, Japan
| | - Chung Keun Jin
- RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan, and Institute for Molecular Science, Okazaki, Aichi 444-8787, Japan
| | - Yasuhiro Uozumi
- RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan, and Institute for Molecular Science, Okazaki, Aichi 444-8787, Japan
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Jin CK, Yamada YMA, Uozumi Y. Chemoselective Oxidation of Sulfides Promoted by a Tightly Convoluted Polypyridinium Phosphotungstate Catalyst with H2. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.547] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Zhou T, Li H, Liu G, Zhang L, Yao D, Hu D. Syntheses of PAM microgel surfacely covered with alkyl quaternary ammonium surfactant/Keggin-type polyoxometalate complexes. J Appl Polym Sci 2009. [DOI: 10.1002/app.31034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Lu J, Toy PH. Organic polymer supports for synthesis and for reagent and catalyst immobilization. Chem Rev 2009; 109:815-38. [PMID: 19128147 DOI: 10.1021/cr8004444] [Citation(s) in RCA: 532] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jinni Lu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
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Ikegami S, Hamamoto H. Novel Recycling System for Organic Synthesis via Designer Polymer-Gel Catalysts. Chem Rev 2009; 109:583-93. [DOI: 10.1021/cr800481x] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shiro Ikegami
- School of Pharmaceutical Sciences, Teikyo University, Sagamihara, Kanagawa 229-0195, Japan, and School of Pharmaceutical Sciences, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan
| | - Hiromi Hamamoto
- School of Pharmaceutical Sciences, Teikyo University, Sagamihara, Kanagawa 229-0195, Japan, and School of Pharmaceutical Sciences, Kinki University, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Japan
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Li H, Zhang P, Zhang L, Zhou T, Hu D. Composite microspheres with PAM microgel core and polymerisable surfactant/polyoxometalate complexes shell. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b823075g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Yamazaki S. An efficient organic solvent-free methyltrioxorhenium-catalyzed epoxidation of alkenes with hydrogen peroxide. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Uozumi Y, M. A. Yamada Y, Guo H. Development of Tightly Convoluted Polymeric Phosphotungstate Catalysts and Their Application to an Oxidative Cyclization of Alkenols and Alkenoic Acids. HETEROCYCLES 2008. [DOI: 10.3987/com-08-s(n)56] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Hamamoto H, Suzuki Y, Takahashi H, Ikegami S. A New Solid-Phase Reaction System Utilizing a Temperature- Responsive Catalyst: Oxidative Cyclization with Hydrogen Peroxide. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200700114] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Development of a convoluted polymeric nanopalladium catalyst: α-alkylation of ketones and ring-opening alkylation of cyclic 1,3-diketones with primary alcohols. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.05.071] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Hamamoto H, Suzuki Y, Takahashi H, Ikegami S. Direct transformation of benzilic amines to carbonyls using polyacrylamide-bound tungstate under phase-transfer catalysis conditions. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.04.071] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Synthesis, characterization and catalytic application of SBA-15 immobilized rare earth metal sandwiched polyoxometalates. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.01.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Yamada YMA, Guo H, Uozumi Y. Tightly Convoluted Polymeric Phosphotungstate Catalyst: An Oxidative Cyclization of Alkenols and Alkenoic Acids. Org Lett 2007; 9:1501-4. [PMID: 17371036 DOI: 10.1021/ol070258v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A tightly convoluted polymeric phosphotungstate catalyst was prepared via ionic assembly of H3PW12O40 and poly(alkylpyridinium). An oxidative cyclization of various alkenols and alkenoic acids was efficiently promoted by the polymeric catalyst in aq H2O2 in the absence of organic solvents to afford the corresponding cyclic ethers and lactones in high yield. The catalyst was reused four times without loss of catalytic activity.
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Affiliation(s)
- Yoichi M A Yamada
- Institute for Molecular Science (IMS), Myodaiji, Okazaki, Aichi 444-8787, Japan
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Fazaeli R, Tangestaninejad S, Aliyan H. Solvent-free selective oximation of aldehydes using facile and reusable heterogenous polyoxometalate. CATAL COMMUN 2007. [DOI: 10.1016/j.catcom.2006.05.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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25
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Yamada YMA, Uozumi Y. A Solid-Phase Self-Organized Catalyst of Nanopalladium with Main-Chain Viologen Polymers: α-Alkylation of Ketones with Primary Alcohols. Org Lett 2006; 8:1375-8. [PMID: 16562895 DOI: 10.1021/ol060166q] [Citation(s) in RCA: 141] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A novel solid-phase self-organized catalyst of palladium nanoparticles was prepared from PdCl(2) with main-chain viologen polymers via complexation and reduction. This insoluble nanocatalyst nano-Pd-V efficiently promoted alpha-alkylation of ketones with primary alcohols in the presence of Ba(OH)(2).H(2)O under atmospheric conditions without organic solvents. The nano-Pd-V catalyst was reused without loss of catalytic activity.
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Affiliation(s)
- Yoichi M A Yamada
- Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8787, Japan
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Yamada YMA. Self-assembled complexes of non-cross-linked amphiphilic polymeric ligands with inorganic species: highly active and reusable solid-phase polymeric catalysts. Chem Pharm Bull (Tokyo) 2005; 53:723-39. [PMID: 15997125 DOI: 10.1248/cpb.53.723] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
I present herein the development of highly active and reusable polymeric catalysts produced by self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species. Thus, PWAA 1 prepared from H3PW12O40 and poly[(N-isopropylacrylamide)-co-(acrylamide with ammonium salt)] is suitable for oxidation of alcohols, amines, and sulfides in aqueous hydrogen peroxide. PdAS 2 produced by self-organization of (NH4)2PdCl4 and poly[(N-isopropylacrylamide)10-co-diphenylphosphinostyrene] is an excellent recyclable catalyst for Suzuki-Miyaura reaction in water, water-organic solvent, and organic solvent. It is commercially available from Tokyo Kasei Kogyo (TCI). PdAS-V 3 assembled from (NH4)2PdCl4 and poly[(N-isopropylacrylamide)5-co-diphenylphosphinostyrene] provides recycling system of itself for Mizorogi-Heck reaction. TiSS 4 made from Ti(O-i-Pr)4 and poly(styryl-linked binaphtholate-co-styrene) promotes an enantioselective carbonyl-ene reaction as a recyclable catalyst.
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Koo DH, Kim M, Chang S. WO3 Nanoparticles on MCM-48 as a Highly Selective and Versatile Heterogeneous Catalyst for the Oxidation of Olefins, Sulfides, and Cyclic Ketones. Org Lett 2005; 7:5015-8. [PMID: 16235946 DOI: 10.1021/ol052019i] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] It is shown that nanosized WO(3) particles supported on MCM-48 work as a highly efficient and selective heterogeneous catalyst for the oxidation of olefins, sulfides, and cyclic ketones using hydrogen peroxide or peracetic acid. The catalytic activity of the supported tungstate was dependent on the nature of the supporting materials and particle size. The catalyst system employs environmentally benign oxidants in halide-free solvents, and it does not require phase-transfer agents and pH control.
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Affiliation(s)
- Dong Hyun Koo
- Center for Molecular Design and Synthesis (CMDS), Department of Chemistry and School of Molecular Science (BK 21), Korea Advanced Institute of Science and Technology (KAIST), Daejeon
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Abstract
Highly active and reusable polymeric catalysts were produced by a self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species. Thus a new insoluble tungsten polymeric catalyst PWAA 1 was prepared from H(3)PW(12)O(40) and poly[(N-isopropylacrylamide)-co-(acrylamide with ammonium salt)], which was suitable for the oxidation of alcohols, amines, and sulfides in aqueous hydrogen peroxide. A new insoluble palladium polymeric catalyst PdAS 2 was produced by self-organization of (NH(4))(2)PdCl(4) and poly[(N-isopropylacrylamide)(10)-co-diphenylphosphinostyrene], which is an excellent recyclable catalyst for the Suzuki-Miyaura reaction in water, water-organic solvents, and organic solvents. It is commercially available from Tokyo Kasei Kogyo (TCI). An improved insoluble palladium polymeric catalyst PdAS-V 3 was assembled from (NH(4))(2)PdCl(4) and poly[(N-isopropylacrylamide)(5)-co-diphenylphosphinostyrene], providing a reusable system for the Mizorogi-Heck reaction. A solid-phase titanium asymmetric polymeric catalyst TiSS 4 was made from Ti (O-i-Pr)(4) and poly(styryl-linked binaphtholate-co-styrene) which promotes an enantioselective carbonyl-ene reaction as a recyclable catalyst.
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Hamamoto H, Suzuki Y, Yamada YMA, Tabata H, Takahashi H, Ikegami S. A Recyclable Catalytic System Based on a Temperature-Responsive Catalyst. Angew Chem Int Ed Engl 2005; 44:4536-8. [PMID: 15968694 DOI: 10.1002/anie.200500574] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hiromi Hamamoto
- School of Pharmaceutical Sciences, Teikyo University, Sagamiko, Kanagawa, 199-0195, Japan
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Hamamoto H, Suzuki Y, Yamada YMA, Tabata H, Takahashi H, Ikegami S. A Recyclable Catalytic System Based on a Temperature-Responsive Catalyst. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500574] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Iimura S, Manabe K, Kobayashi S. Hydrophobic polymer-supported scandium catalyst for carbon–carbon bond-forming reactions in water. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.083] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Yamada YM, Tabata H, Ichinohe M, Takahashi H, Ikegami S. Oxidation of allylic alcohols, amines, and sulfides mediated by assembled triphase catalyst of phosphotungstate and non-cross-linked amphiphilic copolymer. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.072] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yamada YM, Takeda K, Takahashi H, Ikegami S. Assembled catalyst of palladium and non-cross-linked amphiphilic polymer ligand for the efficient heterogeneous Heck reaction. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.068] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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An efficient heterogeneous Heck reaction promoted by a new assembled catalyst of palladium and non-cross-linked amphiphilic polymer. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00220-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Yamada YM, Ichinohe M, Takahashi H, Ikegami S. Assembled catalysts of titanium and non-cross-linked chiral copolymers for an enantioselective carbonyl-ene reaction. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00427-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Chapter 3 Three-membered ring systems. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0959-6380(02)80005-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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