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Your search keyword '"Tsumoru Morimoto"' showing total 5 results
Start Over Author "Tsumoru Morimoto" Journal chemical communications
5 results on '"Tsumoru Morimoto"'

1. Site-selective conversion of azido groups at carbonyl α-positions into oxime groups leading triazide to a triple click conjugation scaffold

Author

Taiki Yokoi, Tsumoru Morimoto, Hiroki Tanimoto, Kiyomi Kakiuchi, and Tomomi Ueda

Subjects
chemistry.chemical_classification, Scaffold, 010405 organic chemistry, Metals and Alloys, General Chemistry, 010402 general chemistry, Oxime, 01 natural sciences, Combinatorial chemistry, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Coupling (electronics), chemistry.chemical_compound, chemistry, Materials Chemistry, Ceramics and Composites, Site selective, Molecule, Diazo, Alkyl
Abstract

This paper reports the selective conversion of alkyl azido groups at the carbonyl α-position into oximes through β-elimination of dinitrogen, followed by transoximation. With this method and diazo conversion, a triazido molecule was transformed into a triple click conjugation scaffold allowing one-pot four-component coupling.

Published
2019
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2. Synthesis and characterization of thiochromone S,S-dioxides as new photolabile protecting groups

Author

Ken Tsutsumi, Tsumoru Morimoto, Kazuki Sugawara, Satoru Kitani, and Kiyomi Kakiuchi

Subjects
Sulfide, Photochemistry, Ultraviolet Rays, Carboxylic Acids, chemistry.chemical_element, Stereoisomerism, Catalysis, Sulfone, chemistry.chemical_compound, Materials Chemistry, Molecule, Sulfhydryl Compounds, Amines, chemistry.chemical_classification, Molecular Structure, Chemistry, Metals and Alloys, Oxides, General Chemistry, Sulfur, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Fluorescence intensity, Chromones, Cyclization, Alcohols, Ceramics and Composites
Abstract

3-Arylthiochromone derivatives were synthesized as new photolabile protecting groups, in which the photoreactivity was switchable based on oxidation of the sulfur atom (sulfide and sulfone); the protected substrates 9,14 released the corresponding alcohols, amines or carbonxylic acids almost quantitatively under UV-light in neutral condition and the photoproduct 10 showed high fluorescence intensity.

Published
2008
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3. Rh(i)-catalyzed CO gas-free cyclohydrocarbonylation of alkynes with formaldehyde to α,β-butenolides

Author

Ken Tsutsumi, Koji Fuji, Tsumoru Morimoto, and Kiyomi Kakiuchi

Subjects
Carbon Monoxide, Molecular Structure, Metals and Alloys, Formaldehyde, chemistry.chemical_element, Stereoisomerism, General Medicine, General Chemistry, Medicinal chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Rhodium, chemistry.chemical_compound, 4-Butyrolactone, chemistry, Cyclization, Alkynes, Materials Chemistry, Ceramics and Composites, Moiety, Organic chemistry
Abstract

The rhodium(I)-catalyzed reaction of alkynes with formaldehyde proceeds via the double incorporation of a carbonyl moiety from formaldehyde, resulting in a CO gas-free cyclohydrocarbonylation leading to alpha,beta-butenolides.

Published
2005
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4. Synthesis and characterization of thiochromone S,S-dioxides as new photolabile protecting groups.

Author

Satoru Kitani, Kazuki Sugawara, Ken Tsutsumi, Tsumoru Morimoto, and Kiyomi Kakiuchi

Subjects
ASYMMETRIC synthesis, PHOTOCHEMISTRY, PHOTOPOLYMERS, ALCOHOLS (Chemical class)
Abstract

3-Arylthiochromone derivatives were synthesized as new photolabile protecting groups, in which the photoreactivity was switchable based on oxidation of the sulfur atom (sulfide and sulfone); the protected substrates 9,14 released the corresponding alcohols, amines or carbonxylic acids almost quantitatively under UV-light in neutral condition and the photoproduct 10 showed high fluorescence intensity. [ABSTRACT FROM AUTHOR]

Published
2008
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