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Subaru Kawasaki

Tohoku University

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Publication

Featured researches published by Subaru Kawasaki.

Tetrahedron Letters | 2002

Preparation and properties of fluorenylidenephosphines bearing an electron-donating substituent, 2-alkoxy-4,6-di-t-butylphenyl or 2-(alkoxymethyl)-4,6-di-t-butylphenyl

Kozo Toyota; Subaru Kawasaki; Masaaki Yoshifuji

Abstract Fluorenylidenephosphines having a 2,4-di-t-butyl-6-methoxyphenyl, 2,4-di-t-butyl-6-(methoxymethyl)phenyl or 2,4-di-t-butyl-6-(phenoxymethyl)phenyl group were prepared. 31P NMR chemical shifts of the fluorenylidenephosphines indicated that electron-donating effects through space are not so strong between the alkoxy group and the double-bonded phosphorus atom. The structure of a tungsten carbonyl complex of [2,4-di-t-butyl-6-(phenoxymethyl)phenyl](fluorenylidene)phosphine was analyzed by X-ray crystallography.

Journal of Organic Chemistry | 2004

Preparation and properties of phosphaethynes bearing bulky aryl groups with electron-donating substituents at the para position.

Kozo Toyota; Subaru Kawasaki; Masaaki Yoshifuji

Bulletin of the Chemical Society of Japan | 2005

The Electronic Effects of Bulky Aryl Substituents on Low Coordinated Phosphorus Atoms in Diphosphenes and Phosphaalkenes by Functionalization at the Para Position

Subaru Kawasaki; Akitake Nakamura; Kozo Toyota; Masaaki Yoshifuji

Tetrahedron Letters | 2004

Preparations and properties of polymers containing 3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]-1,2-di(2-thienyl)cyclobutene moieties

Kozo Toyota; Junichi Ujita; Subaru Kawasaki; Keita Abe; Naoki Yamada; Masaaki Yoshifuji

Chemistry Letters | 2005

Preparation and Properties of Conjugated Polymers Containing 1,2-Diaryl-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene Units

Subaru Kawasaki; Junichi Ujita; Kozo Toyota; Masaaki Yoshifuji

Organometallics | 2005

Preparation and properties of 1,2-diferrocenyl-substituted 3,4-diphosphinidenecyclobutenes and their complexes : The first application of a diphosphinidenecyclobutene unit as a linker of functional moieties

Subaru Kawasaki; Akitake Nakamura; Kozo Toyota; Masaaki Yoshifuji

Chemistry Letters | 2004

Preparation and Properties of 1,2-Bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobuta[l]phenanthrene

Akitake Nakamura; Subaru Kawasaki; Kozo Toyota; Masaaki Yoshifuji

Journal of Organometallic Chemistry | 2007

Reactions of 1,2-di(2-thienyl)-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene

Akitake Nakamura; Subaru Kawasaki; Kozo Toyota; Masaaki Yoshifuji

Chemistry Letters | 2003

Preparation and Properties of Sterically Protected Diphosphene and Fluorenylidenephosphine Bearing the 2,6-Di-tert-butyl-4-methoxyphenyl Group

Kozo Toyota; Subaru Kawasaki; Akitake Nakamura; Masaaki Yoshifuji

Bulletin of the Chemical Society of Japan | 2005

Preparation and properties of fluorenylidene(phenyl)phosphines bearing bulky groups with electron-donating substituents in the ortho position on the phenyl group

Subaru Kawasaki; Takuma Fujita; Kozo Toyota; Masaaki Yoshifuji

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Kozo Toyota

Tohoku University

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Masaaki Yoshifuji

Tohoku University

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Akitake Nakamura

Tohoku University

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Junichi Ujita

Tohoku University

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Keiko Horikawa

Tohoku University

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Keita Abe

Tohoku University

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Kouhei Omori

Tohoku University

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Naoki Yamada

Tohoku University

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Noboru Morita

Tohoku University

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Rader S. Jensen

Kyoto University

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