Výsledky vyhledávání - "Hideyuki Tsuruta"

The first sorbicillinoid alkaloids, the antileukemic sorbicillactones A and B, from a sponge-derived Penicillium chrysogenum strain

Autor: Katja Maksimenka, Stefan Steffens, Sanja Perović-Ottstadt, Hideyuki Tsuruta, Jörg Mühlbacher, Rüdiger Stöhr, Jutta Wiese, Gerhard Lang, Olexandra Boreiko, Gerhard Bringmann, Tobias A. M. Gulder, Johannes F. Imhoff, Karsten Schaumann, Werner E.G. Müller

Publikováno v: Tetrahedron. 61:7252-7265

The saltwater culture of a Penicillium chrysogenum strain isolated from the Mediterranean sponge Ircinia fasciculata yielded three new sorbicillin-derived compounds (1-3), whose structures were elucidated mainly by 2D NMR and mass spectrometry. Among

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::097efba8ac646893a8efcf79dd7c63e2
https://doi.org/10.1016/j.tet.2005.05.026

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Evidence for the importance of conformational equilibria in Rh-diphosphine complexes for the enantioselection in Rh-catalyzed asymmetric hydrogenation

Autor: Hideyuki Tsuruta, Ilya D. Gridnev, Tsuneo Imamoto, Kentaro Yamaguchi

Publikováno v: Tetrahedron Letters. 46:2879-2882

The conformations of the chelate cycles in the X-ray structures of norbornadiene- and cyclooctadiene-rhodium complexes of (R,R)-1,2-bis[(o-methylphenyl)phenylphosphino]ethane are dramatically different. Nevertheless, they demonstrate the same sense o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af9fa01f7f8537c2aa9f63abda822060
https://doi.org/10.1016/j.tetlet.2005.02.115

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Optically Pure 1,2-Bis[(o-alkylphenyl)phenylphosphino]ethanes and Their Use in Rhodium-Catalyzed Asymmetric Hydrogenations ofα-(Acylamino)acrylic Derivatives

Autor: Yoshiyuki Wada, Tsuneo Imamoto, Ilya D. Gridnev, Kentaro Yamaguchi, Hideyuki Tsuruta

Publikováno v: Advanced Synthesis & Catalysis. 346:777-788

Optically pure (S,S)-1,2-bis[(o-alkylphenyl)phenylphosphino]ethanes 1a–d were prepared in four steps from phenyldichlorophosphine via phosphine-boranes as the intermediates. The rhodium complexes 5a–d of these diphosphines were used for the asymm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c8a4c284c088cb104237b0ce53d125f9
https://doi.org/10.1002/adsc.200404043

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Tandem mass spectrometric analysis of rare earth(III) complexes: evaluation of the relative strength of their Lewis acidity

Autor: Hideyuki Tsuruta, Tsuneo Imamoto, Kentaro Yamaguchi

Publikováno v: Tetrahedron. 59:10419-10437

Five series of rare earth(III) complexes coordinated with hexamethylphosphoramide, triethylphosphine oxide, trimethyl phosphate, N , N ′-dimethylpropyleneurea, or dimethyl sulfoxide were subjected to tandem mass spectrometric analysis. The relative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02e68c8cbafd3f934fad40516dd55939
https://doi.org/10.1016/j.tet.2003.06.006

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Asymmetric Hydrogenation Catalyzed by (S,S)-R-BisP*-Rh and (R,R)-R-MiniPHOS Complexes: Scope, Limitations, and Mechanism

Autor: Ilya D. Gridnev, Natsuka Higashi, Yoshinori Yamanoi, Tsuneo Imamoto, Masaya Yasutake, Hideyuki Tsuruta

Publikováno v: Advanced Synthesis & Catalysis. 343:118-136

A new class of chiral C2-symmetric bis(trialkyl)phosphine ligands has been prepared and used in Rh(I)-catalyzed asymmetric hydrogenation reactions. The ligands, 1,2-bis(alkylmethylphosphino)ethanes 1a-g(abbreviated as BisP*, alkyl = t-butyl, 1-adaman

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e6191bece6ff56d9072604414190f6f
https://doi.org/10.1002/1615-4169(20010129)343:1<118::aid-adsc118>3.0.co

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A new P-chiral bisphosphine, 1,1′-bis[(t-butyl)methyl-phosphino]ferrocene, as an effective ligand in catalytic asymmetric hydrosilylation of simple ketones

Autor: Tsuneo Imamoto, Hideyuki Tsuruta

Publikováno v: Tetrahedron: Asymmetry. 10:877-882

The asymmetric hydrosilylation of simple ketones was catalyzed by a rhodium complex with a P-chiral bisphosphine, 1,1′-bis[(t-butyl)methylphosphino]ferrocene, to give optically active alcohols with enantiomeric excesses of up to 92%.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::698b09f04ad79ea01c5439e24910194c
https://doi.org/10.1016/s0957-4166(99)00042-7

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A New P-chiral bisphosphine, (S,S)-1,2-bis[(o-ethylphenyl)phenyl-phosphino]ethane, as an Effective Ligand in Catalytic Asymmetric Hydrogenation of a-(Acylamino)acryIic Acids

Autor: Tsuneo Imamoto, Hideyuki Tsuruta, Hideki Masuda, Yoshiyuki Wada, Kentaro Yamaguchi

Publikováno v: Tetrahedron Letters. 36:8271-8274

( S.S )- 1,2-Bis[( o -ethylphenyl)phenylphosphino]ethane has been prepared via optically active phosphine-boranes. Asymmetric hydrogenation of α-(acylamino)acrylic acids by a rhodium complex with this ligand affords N -acylamino acids in 86–93% ee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd5222dc0265b0ef81f98560fd29c9c6
https://doi.org/10.1016/0040-4039(95)01775-d

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