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Dive into the research topics where Izuru Takei is active.

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Featured researches published by Izuru Takei.


Angewandte Chemie | 1999

Novel Catalytic Hydrogenolysis of Trimethylsilyl Enol Ethers by the Use of an Acidic Ruthenium Dihydrogen Complex

Yoshiaki Nishibayashi; Izuru Takei; Masanobu Hidai

The heterolytic cleavage of H(2) is the key to the novel catalytic hydrogenolysis of trimethylsilyl enol ethers catalyzed by [RuCl(eta(2)-H(2))(dppe)(2)]OTf (dppe = 1,2-bis(diphenylphosphanyl)ethane, OTf = trifluoromethanesulfonate), which results in the formation of a ketone and Me(3)SiH (see scheme). In addition, the stoichiometric, ruthenium-assisted protonation of a prochiral lithium enolate with H(2) gave a chiral ketone with high enantioselectivity (up to 75 % ee).


Chemical Communications | 2001

Ruthenium-catalysed asymmetric hydrosilylation of ketoximes using chiral oxazolinylferrocenylphosphines

Izuru Takei; Yoshiaki Nishibayashi; Youichi Ishii; Yasushi Mizobe; Sakae Uemura; Masanobu Hidai

Chiral ruthenium(II) complexes, RuCl2(PPh3)(oxazolinylferrocenylphosphine), have been found to be effective catalysts for asymmetric hydrosilylation of ketoximes to give the corresponding primary amines in good yields with high enantioselectivities (up to 89% ee) after acid hydrolysis.


Angewandte Chemie | 1999

Hydrogenolyse von Trimethylsilylenolethern unter Verwendung eines sauren Rutheniumdiwasserstoff-Komplexes als Katalysator

Yoshiaki Nishibayashi; Izuru Takei; Masanobu Hidai

Die heterolytische Spaltung von H2ist der Schlusselschritt in der durch [RuCl(η2-H2)(dppe)2]OTf (dppe=1,2-Bis(diphenylphosphanyl)ethan, OTf=Trifluormethansulfonat) katalysierten Hydrogenolyse von Trimethylsilylenolethern, bei der ein Keton und Me3SiH die Produkte sind (siehe Schema). Die ebenfalls beschriebene stochiometrische, Ruthenium-unterstutzte Protonierung eines prochiralen Lithiumenolats mit H2 liefert hochenantioselektiv das chirale Keton (bis 75% ee).


Organometallics | 1998

RUTHENIUM-CATALYZED ASYMMETRIC HYDROSILYLATION OF KETONES AND IMINE

Yoshiaki Nishibayashi; Izuru Takei; Sakae Uemura; Masanobu Hidai


Organometallics | 1999

EXTREMELY HIGH ENANTIOSELECTIVE REDOX REACTION OF KETONES AND ALCOHOLS CATALYZED BY RUCL2(PPH3)(OXAZOLINYLFERROCENYLPHOSPHINE)

Yoshiaki Nishibayashi; Izuru Takei; Sakae Uemura; Masanobu Hidai


Organometallics | 1999

Iridium-Catalyzed Asymmetric Hydrosilylation of Imines Using Chiral Oxazolinyl-Phosphine Ligands

Izuru Takei; Yoshiaki Nishibayashi; Yasuyoshi Arikawa; Sakae Uemura; Masanobu Hidai


Inorganic Chemistry | 2005

Cleavage of Hydrazine N−N Bonds by RuMo3S4 Cubane-Type Clusters

Izuru Takei; Keita Dohki; Koji Kobayashi; Toshiaki Suzuki; Masanobu Hidai


Organometallics | 2003

Synthesis of cubane-type Mo3NiS4 clusters and their catalytic activity for the cyclization of alkynoic acids to enol lactones

Izuru Takei; Youhei Wakebe; Kazuki Suzuki; Yutaka Enta; Toshiaki Suzuki; Yasushi Mizobe; Masanobu Hidai


Organometallics | 2003

Synthesis of a new family of heterobimetallic tetranuclear sulfido clusters with Mo2Ni2Sx (x = 4 or 5) or Mo3M'S4 (M' = Ru, Ni, Pd) cores

Izuru Takei; Kazuki Suzuki; Yutaka Enta; Keita Dohki; Toshiaki Suzuki; Yasushi Mizobe; Masanobu Hidai


Organometallics | 1997

Synthesis, Structures, and Reactivities of Rhodium and Ruthenium Complexes with a Novel Chiral Cyclopentadienyl−Ferrocenyldiphenylphosphine Bidentate Ligand

Yoshiaki Nishibayashi; Izuru Takei; Masanobu Hidai

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Yutaka Enta

Tokyo University of Science

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Kazuki Suzuki

Tokyo University of Science

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Youhei Wakebe

Tokyo University of Science

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