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Your search keyword '"Toshifumi Dohi"' showing total 6 results
Start Over Author "Toshifumi Dohi" Journal angewandte chemie international edition
6 results on '"Toshifumi Dohi"'

1. Efficient Coupling Reaction of Quinone Monoacetal with Phenols Leading to Phenol Biaryls

Author

Daichi Koseki, Yasuyuki Kita, Tohru Kamitanaka, Kohei Tsuboshima, Koji Morimoto, Hitoho Takamuro, and Toshifumi Dohi

Subjects
Steric effects, Reaction mechanism, 010405 organic chemistry, Chemistry, General Medicine, General Chemistry, 010402 general chemistry, 01 natural sciences, Catalysis, Coupling reaction, 0104 chemical sciences, Quinone, chemistry.chemical_compound, Organic chemistry, Phenol, Phenols, Brønsted–Lowry acid–base theory
Abstract

A simple and efficient synthesis of phenol biaryls by the cross-couplings of quinone monoacetals (QMAs) and phenols is reported. The Brønsted acid catalytic system in 1,1,1,3,3,3-hexafluoro-2-propanol was found to be particularly efficient for this transformation. This reaction can be extended to the synthesis of various phenol biaryls, including sterically hindered biaryls, with yields ranging from 58 to 90 % under mild reaction conditions and in a highly regiospecific manner.

Published
2016
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2. Discovery of Stabilized Bisiodonium Salts as Intermediates in the Carbon-Carbon Bond Formation of Alkynes

Author

Yasuyuki Kita, Motoo Shiro, Daishi Kato, Daisuke Yamashita, Toshifumi Dohi, and Ryo Hyodo

Subjects
chemistry.chemical_classification, Chemistry, Aryl, Molecular Conformation, chemistry.chemical_element, General Medicine, General Chemistry, Crystallography, X-Ray, Carbon, Catalysis, Molecular conformation, chemistry.chemical_compound, Nucleophile, Cyclization, Carbon–carbon bond, Alkynes, Organic chemistry, Salts, Spiro Compounds, Iodine
Abstract

In situ generated new bisiodonium salts are used for the conversion of aryl alkynes into functionalized spirocycles by treatment with a nucleophile.

Published
2011
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4. Preparation and Reactivity of 1,3,5,7-Tetrakis[4-(diacetoxyiodo)phenyl]adamantane, a Recyclable Hypervalent Iodine(III) Reagent

Author

Akihisa Maeda, Hirofumi Tohma, Toshifumi Dohi, Tetsuichiro Morita, Akinobu Maruyama, Motoo Shiro, Yasuyuki Kita, and Tomohiro Maegawa

Subjects
Green chemistry, chemistry.chemical_compound, chemistry, Reagent, Adamantane, Hypervalent molecule, chemistry.chemical_element, Organic chemistry, Reactivity (chemistry), General Medicine, General Chemistry, Iodine, Catalysis
Published
2004
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