Výsledky vyhledávání - "Chieko Ogawa"

Akademický článek

Estimating nutrition intake status of community-dwelling elderly people requiring care in disaster settings: A preliminary cross-sectional survey

Autor: Syoichi Tashiro, Michiyuki Kawakami, Asako Oka, Fumio Liu, Atsuko Nishimura, Chieko Ogawa, Fujio Hagai, Sirou Yamamoto, Masato Yazawa, Meigen Liu

Publikováno v: Journal of Rehabilitation Medicine, Vol 51, Iss 4, Pp 312-316 (2019)

Objective: There are a lack of disaster preparedness measures that target populations with dysphagia. In particular, disaster response plans frequently overlook differences in textures between emergency foods and regularly consumed foods. The aim of

Externí odkaz: https://doaj.org/article/4e19b175173342978dcbf00482ed00cd

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Akademický článek

Enhanced Reactivity of [Hydroxy(tosyloxy)iodo]benzene in Fluoroalcohol Media. Efficient Direct Synthesis of Thienyl(aryl)iodonium Salts

Autor: Toshifumi Dohi, Hiromichi Fujioka, Chieko Ogawa, Nobutaka Yamaoka, Motoki Ito, Yasuyuki Kita

Publikováno v: Molecules, Vol 15, Iss 3, Pp 1918-1931 (2010)

In this manuscript, we report clear evidence for the generation of aromatic cation radicals produced by using [hydroxy(tosyloxy)iodo]benzene (HTIB) in fluoroalcohol solvents such as 2,2,2-trifluoroethanol (TFE) and 1,1,1,3,3,3-hexafluoro-2-propanol (

Externí odkaz: https://doaj.org/article/388311b092af426c8d76a797db7c3d32

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Estimating nutrition intake status of community-dwelling elderly people requiring care in disaster settings: A preliminary cross-sectional survey

Autor: Atsuko Nishimura, Asako Oka, Syoichi Tashiro, Masato Yazawa, Meigen Liu, Sirou Yamamoto, Fumio Liu, Chieko Ogawa, Fujio Hagai, Michiyuki Kawakami

Publikováno v: Journal of Rehabilitation Medicine, Vol 51, Iss 4, Pp 312-316 (2019)

Objective There are a lack of disaster preparedness measures that target populations with dysphagia. In particular, disaster response plans frequently overlook differences in textures between emergency foods and regularly consumed foods. The aim of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cadc8714f18fa4ac8fe7b6e40b6e036
https://pubmed.ncbi.nlm.nih.gov/30843083

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Clean and Direct Synthesis of .ALPHA.,.ALPHA.'-Bithiophenes and Bipyrroles by Metal-Free Oxidative Coupling Using Recyclable Hypervalent Iodine(III) Reagents

Autor: Chieko Ogawa, Hiromichi Fujioka, Koji Morimoto, Toshifumi Dohi, Yasuyuki Kita

Publikováno v: Chemical and Pharmaceutical Bulletin. 57:710-713

The facile and clean oxidative biaryl coupling reaction of thiophenes and pyrroles has been achieved using the recyclable hypervalent iodine(III) reagents having adamantane or methane structures. These iodine(III) reagents could be recovered from the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a824a66e6ad1aa6178a78eb3e10709a2
https://doi.org/10.1248/cpb.57.710

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ChemInform Abstract: Metal-Free Regioselective Oxidative Biaryl Coupling Leading to Head-to-Tail Bithiophenes: Reactivity Switching, a Concept Based on the Iodonium(III) Intermediate

Autor: Yasuyuki Kita, Chieko Ogawa, Tomofumi Nakae, Toshifumi Dohi, Hiromichi Fujioka, Nobutaka Yamaoka, Koji Morimoto

Publikováno v: ChemInform. 41

The reaction is based on the formation of 2,3-disubstituted thienyliodonium salt intermediates that activate the 5-position exclusively.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3cb09906e1858d8f72182e926743447
https://doi.org/10.1002/chin.201051100

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Metal-free regioselective oxidative biaryl coupling leading to head-to-tail bithiophenes: reactivity switching, a concept based on the iodonium(III) intermediate

Autor: Hiromichi Fujioka, Yasuyuki Kita, Chieko Ogawa, Nobutaka Yamaoka, Koji Morimoto, Tomofumi Nakae, Toshifumi Dohi

Publikováno v: Organic letters. 12(17)

A new synthetic concept for obtaining unsymmetrical biaryl coupling products by an oxidative method is reported. Our synthetic strategy casts light on the reaction intermediate for switching the reactivity of 3-substituted thiophenes. On the basis of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90aa14457073471f5ae9dbd44eb8698a
https://pubmed.ncbi.nlm.nih.gov/20690618

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ChemInform Abstract: Metal-Free Oxidative Cross-Coupling of Unfunctionalized Aromatic Compounds

Autor: Akihiro Goto, Yasuyuki Kita, Toshifumi Dohi, Chieko Ogawa, Koji Morimoto, Motoki Ito

Publikováno v: ChemInform. 40

A new strategy for mixed biaryl synthesis has been developed using the hypervalent iodine(III) reagents. The unique reactivities of the σ-heteroaryl iodine(III) intermediates generated in situ are the key element for the unusual metal catalyst-free

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::91246f1c8ee3cdc6ef30361ffaeecc30
https://doi.org/10.1002/chin.200925102

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Metal-free oxidative cross-coupling of unfunctionalized aromatic compounds

Autor: Motoki Ito, Yasuyuki Kita, Chieko Ogawa, Koji Morimoto, Akihiro Goto, Toshifumi Dohi

Publikováno v: Scopus-Elsevier

A new strategy for mixed biaryl synthesis has been developed using the hypervalent iodine(III) reagents. The unique reactivities of the sigma-heteroaryl iodine(III) intermediates generated in situ are the key element for the unusual metal catalyst-fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3028ba4a4a1173f0dfae385d638807d4
https://pubmed.ncbi.nlm.nih.gov/19191694

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