Zobrazeno 1 - 10 of 67 pro vyhledávání: '"Ishimoto, Ryo"'
1
Synthesis and structural characterization of BINOL-modified chiral polyoxometalates
Autor: Ishimoto, Ryo, Kamata, Keigo, Suzuki, Kosuke, Yamaguchi, Kazuya, Mizuno, Noritaka.
Publikováno v: Dalton Transactions. 44(No. 24):10947-10951
Chiral ligand-modified polyoxometalates (POMs), (Bu4N)4[ﾎｳ-SiTi2W10O36(ﾎｼ-OH)2(ﾎｼ-BINOLate)], were successfully synthesized by the introduction of (R)- or (S)-BINOL into the dititanium-substituted tungstosilicate POM in an org. medium and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::684905b9682baa89722f3f5f6ec02077
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100702604
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2
Highly Selective Epoxidation of Cycloaliphatic Alkenes with Aqueous Hydrogen Peroxide Catalyzed by [PO4{WO(O2)2}4]3−/Imidazole
Autor: Kamata, Keigo, Sugahara, Kosei, Ishimoto, Ryo, Nojima, Susumu, Okazaki, Motoya, Matsumoto, Takaya, Mizuno, Noritaka.
Publikováno v: ChemCatChem. 6:2327-2332
In the presence of imidazole as an additive, a phosphorus-contg. tetranuclear peroxotungstate, THA3[PO4{WO(O2)2}4] (I, THA = tetra-n-hexylammonium), could act as an efficient catalyst for epoxidn. of cycloaliph. alkenes with 30% aq. hydrogen peroxide
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc6af7c7e4b8e4abc2b71583709bc5c4
https://doi.org/10.1002/cctc.201402268
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4
Akademický článek
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5
Investigation of the Reaction Mechanism for the Epoxidation of Alkenes with Hydrogen Peroxide Catalyzed by a Protonated Tetranuclear Peroxotungstate with NMR Spectroscopy, Kinetics, and DFT Calculations
Autor: Ishimoto, Ryo, Kamata, Keigo, Mizuno, Noritaka.
Publikováno v: European Journal of Inorganic Chemistry. 2013:1943-1950
For the epoxidation of cyclooctene with hydrogen peroxide (H2O2), the catalytic activity of a dinuclear peroxotungstate, [{WO(O2)2}2(μ-O)]2–, is strongly dependent on additives, and HClO4 is the most effective. The reaction of [{WO(O2)2}2(μ-O)]2
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed25d5be5735ed57ca282a04527b83c4
https://doi.org/10.1002/ejic.201201058
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6
A highly active protonated tetranuclear peroxotungstate for oxidation with hydrogen peroxide
Autor: Ishimoto, Ryo, Kamata, Keigo, Mizuno, Noritaka
Publikováno v: Angewandte Chemie (International ed. in English). 51(No. 19):4662-5
Catalytic epoxidn. by a dinuclear peroxotungstate was dramatically accelerated by the addn. of 0.5 equiv of an acid, and a novel tetranuclear peroxotungstate, TPA2[{WO(O2)2}2(ﾎｼ-O)] (I), was successfully synthesized by the reaction of [{WO(O2)2}2
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39dd3f253269e354194e5df4bdf80eac
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100683236
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7
Efficient epoxidation of electron-deficient alkenes with hydrogen peroxide catalyzed by [ﾎｳ-PW10O38V2(ﾎｼ-OH)2]3
Autor: Kamata, Keigo, Sugahara, Kosei, Yonehara, Kazuhiro, Ishimoto, Ryo, Mizuno, Noritaka
Publikováno v: Chemistry (Weinheim an der Bergstrasse, Germany). 17(No. 27):7549-59
A divanadium-substituted phosphotungstate, [ﾎｳ-PW(10)O(38)V(2)(ﾎｼ-OH)(2)](3-) (I), showed the highest catalytic activity for the H(2)O(2)-based epoxidation of allyl acetate among vanadium and tungsten complexes with a turnover number of 210.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32e5f970cde2f8ee1f2eefade004b1fa
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100683242
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8
A flexible nonporous heterogeneous catalyst for size-selective oxidation through a bottom-up approach
Autor: Mizuno, Noritaka, Uchida, Sayaka, Kamata, Keigo, Ishimoto, Ryo, Nojima, Susumu, Yonehara, Koji, Sumida, Yasutaka
Publikováno v: Angewandte Chemie (International ed. in English). 49(No. 51):9972-6
The nonporous ([(Bu)4N]4[ﾎｳ-SiW10O34(H2O)2]ﾂｷH2O, 1.H2O) synthesized through a bottom-up approach sorbs EtOAc, which is highly mobile in the solid bulk of the compd., probably contributing to the easy co-sorption of olefins and H2O2. 1 Hetero
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37e3f804e75184e97f9b78ec19f53daa
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100683245
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9
Epoxidation of Alkenes with Hydrogen Peroxide Catalyzed by Selenium-Containing Dinuclear Peroxotungstate and Kinetic, Spectroscopic, and Theoretical Investigation of the Mechanism
Autor: Kamata, Keigo, Ishimoto, Ryo, Hirano, Tomohisa, Kuzuya, Shinjiro, Uehara, Kazuhiro, Mizuno, Noritaka.
Publikováno v: Inorganic Chemistry. 49(No. 5):2471-2478
The dinuclear peroxotungstate with a SeO(4)(2-) ligand, (TBA)(2)[SeO(4){WO(O(2))(2)}(2)] (I; TBA = [(n-C(4)H(9))(4)N](+)), could act as an efficient homogeneous catalyst for the selective oxidation of various kinds of organic substances such as olefi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4113fe458ca00f65742d6a18c9408e1
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100666666
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10
Highly Selective Oxidation of Organosilanes to Silanols with Hydrogen Peroxide Catalyzed by a Lacunary Polyoxotungstate
Autor: Ishimoto, Ryo, Kamata, Keigo, Mizuno, Noritaka.
Publikováno v: Angewandte Chemie International Edition. 48:8900-8904
Divacant lacunary polyoxotungstate (Bu4N+)4[ﾎｳ-SiW10O34(H2O)2] (1) is an efficient homogeneous catalyst for highly selective oxidn. of organosilanes to silanols with 30-60 % aq. H2O2. Various kinds of silanes, Ph2MeSiH, Et3SiH, (C6H13)3SiH, tBuMe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24a9f2a0ac7a01ee60e6438b0d1c2905
https://doi.org/10.1002/anie.200904694
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