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  1. Book: Quality of service on linux for the atlas TDAQ event building network

    Yasu, Y

    (KEK Preprint ; 2001,105)

    2001  

    Author's details Y. Yasu
    Series title KEK Preprint ; 2001,105
    Language English
    Size 4 S, graph. Darst
    Publisher High Energy Accelerator Research Organization (KEK)
    Publishing place Tsukuba
    Document type Book
    Note Submitted to International Conference on Computing in High Energy and Nuclear Physics (CHEP#01), Beijing, P.R. China, September 3 - 7, 2001
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  2. Book: Quality of service on gigabit ethernet for event builder

    Yasu, Y

    (KEK Preprint ; 2000,128)

    2000  

    Author's details Y. Yasu
    Series title KEK Preprint ; 2000,128
    Language English
    Size 5 S, graph. Darst
    Publisher High Energy Accelerator Research Organization (KEK)
    Publishing place Tsukuba
    Document type Book
    Note Submitted to DAQ2000 Workshop, IEEE NSS, Lyon, France, October 20, 2000
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Article: Direct C-H trifluoromethylation of di- and trisubstituted alkenes by photoredox catalysis.

    Tomita, Ren / Yasu, Yusuke / Koike, Takashi / Akita, Munetaka

    Beilstein journal of organic chemistry

    2014  Volume 10, Page(s) 1099–1106

    Abstract: Background: Trifluoromethylated alkene scaffolds are known as useful structural motifs in pharmaceuticals and agrochemicals as well as functional organic materials. But reported synthetic methods usually require multiple synthetic steps and/or exhibit ... ...

    Abstract Background: Trifluoromethylated alkene scaffolds are known as useful structural motifs in pharmaceuticals and agrochemicals as well as functional organic materials. But reported synthetic methods usually require multiple synthetic steps and/or exhibit limitation with respect to access to tri- and tetrasubstituted CF3-alkenes. Thus development of new methodologies for facile construction of Calkenyl-CF3 bonds is highly demanded.
    Results: The photoredox reaction of alkenes with 5-(trifluoromethyl)dibenzo[b,d]thiophenium tetrafluoroborate, Umemoto's reagent, as a CF3 source in the presence of [Ru(bpy)3](2+) catalyst (bpy = 2,2'-bipyridine) under visible light irradiation without any additive afforded CF3-substituted alkenes via direct Calkenyl-H trifluoromethylation. 1,1-Di- and trisubstituted alkenes were applicable to this photocatalytic system, providing the corresponding multisubstituted CF3-alkenes. In addition, use of an excess amount of the CF3 source induced double C-H trifluoromethylation to afford geminal bis(trifluoromethyl)alkenes.
    Conclusion: A range of multisubstituted CF3-alkenes are easily accessible by photoredox-catalyzed direct C-H trifluoromethylation of alkenes under mild reaction conditions. In particular, trifluoromethylation of triphenylethene derivatives, from which synthetically valuable tetrasubstituted CF3-alkenes are obtained, have never been reported so far. Remarkably, the present facile and straightforward protocol is extended to double trifluoromethylation of alkenes.
    Language English
    Publishing date 2014-05-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2192461-2
    ISSN 1860-5397
    ISSN 1860-5397
    DOI 10.3762/bjoc.10.108
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Combining photoredox-catalyzed trifluoromethylation and oxidation with DMSO: facile synthesis of α-trifluoromethylated ketones from aromatic alkenes.

    Tomita, Ren / Yasu, Yusuke / Koike, Takashi / Akita, Munetaka

    Angewandte Chemie (International ed. in English)

    2014  Volume 53, Issue 28, Page(s) 7144–7148

    Abstract: Trifluoromethylated ketones are useful building blocks for organic compounds with a trifluoromethyl group. A new and facile synthesis of ketones with a trifluoromethyl substituent in the α-position proceeds through a one-pot photoredox-catalyzed ... ...

    Abstract Trifluoromethylated ketones are useful building blocks for organic compounds with a trifluoromethyl group. A new and facile synthesis of ketones with a trifluoromethyl substituent in the α-position proceeds through a one-pot photoredox-catalyzed trifluoromethylation-oxidation sequence of aromatic alkenes. Dimethyl sulfoxide (DMSO) serves as a key and mild oxidant under these photocatalytic conditions. Furthermore, an iridium photocatalyst, fac[Ir(ppy)3 ] (ppy=2-phenylpyridine), turned out to be crucial for the present photoredox process.
    Language English
    Publishing date 2014-07-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.201403590
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book: Java performance for DAQ

    Yasu, Y

    (KEK Preprint ; 97-262)

    1998  

    Author's details Y. Yasu
    Series title KEK Preprint ; 97-262
    Language English
    Size 8 S, graph. Darst
    Publisher High Energy Accelerator Research Organization (KEK)
    Publishing place Tsukuba
    Document type Book
    Note Submitted to SysComms 98, 25 - 26 March 1998, CERN, Geneva, Switzerland
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Book: Evaluation of gigabit Ethernet with Java/HORB

    Yasu, Y

    (KEK Preprint ; 98-181)

    1998  

    Author's details Y. Yasu
    Series title KEK Preprint ; 98-181
    Language English
    Size 7 S, graph. Darst
    Publisher High Energy Accelerator Research Organization (KEK)
    Publishing place Tsukuba
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  7. Article ; Online: Visible-light-induced hydroalkoxymethylation of electron-deficient alkenes by photoredox catalysis.

    Miyazawa, Kazuki / Yasu, Yusuke / Koike, Takashi / Akita, Munetaka

    Chemical communications (Cambridge, England)

    2013  Volume 49, Issue 65, Page(s) 7249–7251

    Abstract: Hydroalkoxymethylation of electron-deficient alkenes using alkoxymethyltrifluoroborates by photoredox catalysis has been developed. Highly reactive alkoxymethyl radicals can be easily generated from oxidation of alkoxymethyltrifluoroborates via a visible- ...

    Abstract Hydroalkoxymethylation of electron-deficient alkenes using alkoxymethyltrifluoroborates by photoredox catalysis has been developed. Highly reactive alkoxymethyl radicals can be easily generated from oxidation of alkoxymethyltrifluoroborates via a visible-light-induced SET process.
    Language English
    Publishing date 2013-08-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c3cc42695e
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Visible-light-induced synthesis of a variety of trifluoromethylated alkenes from potassium vinyltrifluoroborates by photoredox catalysis.

    Yasu, Yusuke / Koike, Takashi / Akita, Munetaka

    Chemical communications (Cambridge, England)

    2013  Volume 49, Issue 20, Page(s) 2037–2039

    Abstract: A facile synthesis of trifluoromethylated alkenes by the radical-mediated trifluoromethylation of vinyltrifluoroborates has been developed. Togni's reagent serves as a CF(3) radical precursor in the presence of the photoredox catalyst [Ru(bpy)(3)](PF(6))( ...

    Abstract A facile synthesis of trifluoromethylated alkenes by the radical-mediated trifluoromethylation of vinyltrifluoroborates has been developed. Togni's reagent serves as a CF(3) radical precursor in the presence of the photoredox catalyst [Ru(bpy)(3)](PF(6))(2) under visible light irradiation. This new photocatalytic protocol can be applicable to a wide variety of vinylborates containing electronically diverse substituents and hetero-aromatics.
    MeSH term(s) Alkenes/chemistry ; Borates/chemistry ; Catalysis ; Coordination Complexes/chemistry ; Light ; Oxidation-Reduction ; Potassium/chemistry
    Chemical Substances Alkenes ; Borates ; Coordination Complexes ; fluoroboric acid (H429WZ9FBQ) ; Potassium (RWP5GA015D)
    Language English
    Publishing date 2013-03-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c3cc39235j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Intermolecular aminotrifluoromethylation of alkenes by visible-light-driven photoredox catalysis.

    Yasu, Yusuke / Koike, Takashi / Akita, Munetaka

    Organic letters

    2013  Volume 15, Issue 9, Page(s) 2136–2139

    Abstract: Intermolecular aminotrifluoromethylation of alkenes catalyzed by [Ru(bpy)3](2+) under visible light irradiation has been explored. The present photocatalytic protocol achieves highly efficient and regioselective difunctionalization of C═C bonds, leading ... ...

    Abstract Intermolecular aminotrifluoromethylation of alkenes catalyzed by [Ru(bpy)3](2+) under visible light irradiation has been explored. The present photocatalytic protocol achieves highly efficient and regioselective difunctionalization of C═C bonds, leading to a variety of β-trifluoromethylamines. The reaction is applied to "late-stage aminotrifluoromethylation" of steroid and amino acid scaffolds.
    Language English
    Publishing date 2013-05-03
    Publishing country United States
    Document type Journal Article
    ISSN 1523-7052
    ISSN (online) 1523-7052
    DOI 10.1021/ol4006272
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Inter-library loan at ZB MED

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  10. Article: Visible-light-induced synthesis of a variety of trifluoromethylated alkenes from potassium vinyltrifluoroborates by photoredox catalysis

    Yasu, Yusuke / Akita, Munetaka / Koike, Takashi

    Chemical communications. 2013 Feb. 12, v. 49, no. 20

    2013  

    Abstract: A facile synthesis of trifluoromethylated alkenes by the radical-mediated trifluoromethylation of vinyltrifluoroborates has been developed. Togni's reagent serves as a CF3 radical precursor in the presence of the photoredox catalyst [Ru(bpy)3](PF6)2 ... ...

    Abstract A facile synthesis of trifluoromethylated alkenes by the radical-mediated trifluoromethylation of vinyltrifluoroborates has been developed. Togni's reagent serves as a CF3 radical precursor in the presence of the photoredox catalyst [Ru(bpy)3](PF6)2 under visible light irradiation. This new photocatalytic protocol can be applicable to a wide variety of vinylborates containing electronically diverse substituents and hetero-aromatics.
    Keywords alkenes ; catalysts ; chemical communication ; irradiation ; light ; photocatalysis ; potassium ; redox reactions ; ruthenium
    Language English
    Dates of publication 2013-0212
    Size p. 2037-2039.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c3cc39235j
    Database NAL-Catalogue (AGRICOLA)

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