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Your search keyword '"Yasuyuki Nagata"' showing total 2 results
Start Over Author "Yasuyuki Nagata" Publisher the chemical society of japan
2 results on '"Yasuyuki Nagata"'

1. A New Synthesis of Flavones by the Reaction of 2-Phenyl-2H-1-benzopyrans with Potassium Permanganate

Author

Yasuyuki Nagata, Kazu Kurosawa, and Yoshihiro Ashihara

Subjects
chemistry.chemical_classification, Potassium permanganate, chemistry.chemical_compound, Reaction mechanism, Chemistry, Acetone, Substituent, Organic chemistry, General Chemistry, Benzopyrans, Flavones
Abstract

The oxidation often 2-phenyl-2H-1-benzopyrans with potassium permanganate in acetone has been found to give the corresponding flavones in 8–73% yields. The reaction mechanism is discussed on the basis of the substituent effect and the oxidations of related compounds.

Published
1977

2. The Reactions of 2-Phenyl-2H-1-benzopyrans and 2-Phenyl-4H-1-benzopyrans with Lead(IV) Acetate

Author

Hisatake Ohki, Yasuyuki Nagata, Katsutoshi Yamaguchi, and Kazu Kurosawa

Subjects
Propenyl, chemistry.chemical_compound, chemistry, Organic chemistry, General Chemistry, Benzofuran, Lead(IV) acetate, Benzopyrans
Abstract

The reactions of 7-methoxy-2-phenyl-2H-1-benzopyran and 7-methoxy-2-phenyl-4H-1-benzopyran with lead(IV) acetate gave 2-benzoyl-6-methoxybenzofuran and 6-acetoxy-3-methoxy-6-(3-oxo-3-phenyl-1 -propenyl)-2,4-cyclo-hexadien-1-one. The reactions of 7-methoxy-2-(p-methoxy-phenyl)-2H-1-benzopyran and 7-methoxy-2-(p-methoxyphen-yl)-4H-1-benzopyran with lead(IV) acetate also gave the corresponding benzofuran and cyclohexadienone. The reaction pathway is discussed.

Published
1980

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