Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Takamichi Yamagishi"'
Autor:
Daisuke Hirasawa, Takamichi Yamagishi, Kaku Tanaka, Takuma Yamahara, Kiyoshi Sato, Yuichi Watanabe
Publikováno v:
Molecular Catalysis. 452:184-191
In the catalytic cross-coupling reaction of ketimines, derived from 1-acetonaphthone or acetophenone derivatives and benzylamine, with trialkoxyvinylsilanes RuH2(PPh3)4 or RuH2(CO)(PPh3)3 catalyst caused the selective alkenylation and alkylation on e
Autor:
Motowo Yamaguchi, Yuuta Uchida, Masatoshi Onuki, Chisato Urano, Risa Suzuki, Dai Masui, Kiyoshi Sato, Takamichi Yamagishi
Publikováno v:
Molecular Catalysis. 499:111221
The reactivity difference of major and minor π-allyl species was examined for two typed asymmetric allylic substitutions via linear symmetrical π-allyl and linear unsymmetrical π-allyl intermediates. 31P NMR observation of the stoichiometric react
Publikováno v:
Tetrahedron Letters. 48:1493-1496
A new tripodal imidazolium ligand 2 comprising three 2,2′-bipyridine–imidazolium subunits connected through a mesityl spacer has been synthesized and 1:1 complexes of 2 with Fe(II) and Ru(II) ions have been prepared. 1H NMR spectroscopy including
Autor:
Shinichi Izawa, Takashi Kumano, Motowo Yamaguchi, Takamichi Yamagishi, Dai Masui, Hiroyuki Kousaka, Yoshiki Ichii
Publikováno v:
Inorganic Chemistry. 45:8342-8354
New ruthenium(II) complexes having a tetradentate ligand such as tris(2-pyridylmethyl)amine (TPA), tris[2-(5-methoxycarbonyl)pyridylmethyl]amine [5-(MeOCO)3-TPA], tris(2-quinolylmethyl)amine (TQA), or bis(2-pyridylmethyl)glycinate (BPG) have been pre
Autor:
Takamichi Yamagishi, Dai Masui, Motowo Yamaguchi, Kazuhiro Takagaki, Miki Tomizawa, Masayoshi Shimo
Publikováno v:
Catalysis Today. 117:206-209
Photoreactions of chloro(Me2SO)bis(bipyridine)ruthenium(II) complex and the MeCN ruthenium(II) complexes having both a tridentate ligand, such as a tris(1-pyrazolyl)methane (=tpm), a tris(1-pyrazolyl)ethane (=tpe), or a 2,6-bis(1-pyrazolyl)pyridine (
Publikováno v:
Liebigs Annalen. 1996:439-446
The synthesis of a series of substituted 6a-azonia[5]helicene salts 3d–j and 12a-azoniabenzo[ghi]perylene salts 4d and 4g by photocyclization of the corresponding 2-styrylbenzo[a]-quinolizinium derivatives 2d–j is described. The product ratios of
Publikováno v:
Electrochemistry. 72:171-174
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 59:m487-m490
In the structures of the title compounds, [Pd(C5H9)(C32H37N2O2P)]PF6 and [PdCl2(C32H37N2O2P)], the bis(dihydrooxazolyl)phosphine ligand is N,P-bidentate, with S chirality on the P atom. In the allyl complex, the π-allyl ligand ligates in a syn–syn
Autor:
Takamichi Yamagishi, Motowo Yamaguchi, Takahiro Kiyooka, Dai Masui, Kiyoshi Sato, Masatoshi Ohnuki
Publikováno v:
Tetrahedron: Asymmetry. 14:3275-3279
Chiral bisoxazolylphosphine ligands 1 [( S , S )-PhP(Ox-R) 2 : R=Me, i Pr, t Bu] with an NPN backbone were prepared from chiral 4-alkyl-2-phenyl-4,5-dihydrooxazole compounds. These ligands coordinated to Pd(II) ion as bidentate ligands selectiv
Publikováno v:
Journal of Heterocyclic Chemistry. 39:425-428
Oxidative photocyclization of 4-(2-arylvinyl)benzo[a]quinolizinium salts (6) gave five- or six-mem-bered rings depending on the aryl substituent. The olefins 6a and 6b with a phenyl or naphthyl substituent resulted in a normal six-membered ring forma