T
Toyonobu Asao
Researcher at Tohoku University
Publications - 187
Citations - 1178
Toyonobu Asao is an academic researcher from Tohoku University. The author has contributed to research in topics: Azulene & Tropone. The author has an hindex of 18, co-authored 187 publications receiving 1145 citations. Previous affiliations of Toyonobu Asao include University of Toyama & Iwate University.
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Journal ArticleDOI
Syntheses of Azulene Analogues of Triphenylmethyl Cation: Extremely Stable Hydrocarbon Carbocations and the First Example of a One-Ring Flip as the Threshold Rotation Mechanism for Molecular Propellers
TL;DR: In this article, a series of azulene analogues of triphenylmethyl cation (tri(1-azulenyl)methyl, di(1)-azulene)phenylmethyl, and (1-enzyl)diphenyl methyl hexafluorophosphates) were synthesized by hydride abstraction from the corresponding methane derivatives with DDQ.
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Tris[6-(dimethylamino)-1-azulenyl]methyl Hexafluorophosphate. Extremely Stable Methyl Cation with the Highest pKR+ Value
TL;DR: In this article, the properties of tris[6-(dimethylamino)- and 6-morpholino-1-azulenyl] methyl cations were characterized.
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Azulene analogues of triphenylmethyl cation; extremely stable hydrocarbon carbocations
TL;DR: A series of azulene analogues of triphenylmethyl cation, tri(1-azulenyl) methyl cation; tri-1-enzyl)methyl cations; di(1 -azulene)phenylmethylcation; and di-1 -enzyl-diphenyl methylcation were synthesized in this paper.
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Synthesis and Redox Behavior of 1-Azulenyl Sulfides and Efficient Synthesis of 1,1′-Biazulenes
Taku Shoji,Junya Higashi,Shunji Ito,Kozo Toyota,Toyonobu Asao,Masafumi Yasunami,Kunihide Fujimori,Noboru Morita +7 more
TL;DR: In this article, the reaction of azulenes with several sulfoxides in the presence of acid anhydrides to afford the corresponding 1-azulenylsulfonium and 1,3 -azulenediyldisulfonion ions is reported.
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Synthesis, properties, and redox behavior of di(1-azulenyl)(2- and 3-thienyl)methyl cations and dications composed of two di(1-azulenyl)methylium units connected with 2,5-thiophenediyl and 2,5-thienothiophenediyl spacers.
TL;DR: The titled stable monocations, di(1-azulenyl)(2- and 3-thienyl)methyl cations 7a, b and 8a,b and dications composed of two di( 1-azULenyl) methylium units connected with 2,5-thiophenediyl and 2,3,2-b]thieno[3,3-b].