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Your search keyword '"Seiichi Nakahama"' showing total 5 results
Start Over Author "Seiichi Nakahama" Journal chemischer informationsdienst
5 results on '"Seiichi Nakahama"'

3. ChemInform Abstract: CHEMOSELECTIVE REDUCTION OF PHENYL KETONES WITH AMINO ALCOHOL-BORANE COMPLEXES

Author

T. Wakasugi, Seiichi Nakahama, Koichi Ito, Akira Hirao, and Shinichi Itsuno

Subjects
chemistry.chemical_classification, chemistry.chemical_compound, Hydrolysis, Ketone, chemistry, Reducing agent, Reagent, Organic chemistry, Alcohol, General Medicine, Borane, Primary alcohol, Oxime
Abstract

A new reducing agent was prepared from borane and amino alcohols. The reagent is very effective for chemoselective reduction of ketones in the presence of esters, oxime ethers, tertiary amides, nitriles, halides, and acyl chlorides. The polymeric reagent prepared from borane and polymer-supported amino alcohol was also prepared easily. Aldehydes are highly selectively reduced to primary alcohols in the presence of ketone with the polymeric reagent. Simple filtration separated cleanly the unchanged ketone from the polymeric reagent which gave, after hydrolysis, only primary alcohol as the product. The polymeric reagent was regenerated by treatment with borane and could be reused.

Published
1985

5. ChemInform Abstract: A Coiled Synthetic Carboxylic Ionophore Capable of Encapsulating a Potassium Ion

Author

Satoru Nagami, Kazuo Yamaguchi, Akira Hirao, Hitoshi Kuboniwa, Seiichi Nakahama, and Noboru Yamazaki

Subjects
Membrane, chemistry, Ether oxygen, Potassium, Polymer chemistry, Ionophore, chemistry.chemical_element, Aromaticity, General Medicine, Ion transporter
Abstract

A synthetic carboxylic ionophore with eight ether oxygen and five aromatic rings mediated selective K+ ion transport through a liquid membrane; the coiled carboxylate-encapsulated potassium ion is highly lipophilic.

Published
1986

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