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Your search keyword '"Hidetoshi Okano"' showing total 3 results
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3 results on '"Hidetoshi Okano"'

1. Application of soft X-ray microspectroscopic analyses to architectural structures – a case study on ceramic-tile/adhesive/mortar-structured composite materials

Author

Masaki Oura, Hidekazu Takano, Satoru Hamamoto, Takaki Hatsui, Haruhisa Kurauchi, Hidetoshi Okano, Masashi Kawaharada, Kazushi Yokoyama, Makina Yabashi, Masato Akimoto, and Tetsuya Ishikawa

Subjects
Mechanics of Materials, Materials Chemistry, Surfaces and Interfaces, General Chemistry, Surfaces, Coatings and Films
Published
2022
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2. N-Aminomethylation vs. C-Aminomethylation of Indole and Pyrrole with an N,O-Acetal Controlled by the Hardness of a Counter Ion of an Iminium Compound

Author

Hidetoshi Okano, Takeo Konakahara, Norio Sakai, and Kazuyori Shimamura

Subjects
chemistry.chemical_classification, Indole test, chemistry.chemical_compound, chemistry, Acetal, Polymer chemistry, Iminium, Organic chemistry, General Chemistry, Counterion, Pyrrole
Abstract

Under relatively strong Lewis acidic conditions (a softer counter ion) using TMSOTf and TMSI, the aminomethylation of indole or pyrrole with a typical N,O-acetal preferentially produced the kinetic...

Published
2014
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3. N-Aminomethylation vs. C-Aminomethylation of Indole and Pyrrole with an N,O-Acetal Controlled by the Hardness of a Counter Ion of an Iminium Compound.

Author

Norio Sakai, Hidetoshi Okano, Kazuyori Shimamura, and Takeo Konakahara

Abstract

Under relatively strong Lewis acidic conditions (a softer counter ion) using TMSOTf and TMSI, the aminomethylation of indole or pyrrole with a typical N,O-acetal preferentially produced the kinetically favored N-aminomethylated indole or pyrrole derivative. Use of a relatively weak Lewis acid (a harder counter ion), such as TMSCl and TMSBr, preferentially produced the thermodynamically favored C-aminomethylated indole and pyrrole derivative. [ABSTRACT FROM AUTHOR]

Published
2014
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