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8 results on '"Aoyama, Tadashi"'

5. Photochemical addition of cyclic ethers/acetals to olefins using BuOO Bu: Synthesis of masked ketones/aldehydes and diols

Author

Hayakawa, Mamiko, primary, Shimizu, Rina, additional, Omori, Hajime, additional, Shirota, Hisashi, additional, Uchida, Kou, additional, Mashimo, Hiroshi, additional, Xu, Han, additional, Yamada, Ryuusei, additional, Niino, Seiya, additional, Wakame, Yoshiki, additional, Liu, Chuanxiang, additional, Aoyama, Tadashi, additional, and Ouchi, Akihiko, additional

Published
2020
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7. Direct alkylation of aromatics using alcohols in the presence of NaHSO4/SiO2

Author

Sato, Yuta, Aoyama, Tadashi, Takido, Toshio, and Kodomari, Mitsuo

Subjects
*ALKYLATION, *ALCOHOLS (Chemical class), *SODIUM sulfate, *SILICA, *METHANE, *AROMATIC compounds
Abstract

Abstract: Simple and efficient procedure for alkylation of aromatics from alcohols in the presence of NaHSO4/SiO2 was developed. Various triaryl methanes were obtained in good yields in short reaction time. For instance the reaction of mesitylene with benzhydrol in the presence of NaHSO4/SiO2 gave the corresponding triaryl methane in a quantitative yield. NaHSO4/SiO2 was regenerated by simple treatment and could be recycled eight times without activity loss. [Copyright &y& Elsevier]

Published
2012
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8. One pot synthesis using supported reagents system KSCN/SiO2–RNH3OAc/Al2O3: synthesis of 2-aminothiazoles and N-allylthioureas

Author

Aoyama, Tadashi, Murata, Sumiko, Arai, Izumi, Araki, Natsumi, Takido, Toshio, Suzuki, Yoshitada, and Kodomari, Mitsuo

Subjects
*CHEMICAL reagents, *ORGANIC compounds, *THIAZOLES, *PRAMIPEXOLE
Abstract

Abstract: A simple and efficient method has been developed for the synthesis of 2-aminothiazoles and N-allylthioureas from commercially available materials in one pot by using a supported reagents system, KSCN/SiO2–RNH3OAc/Al2O3, in which α-halo ketone reacts first KSCN/SiO2 and the product, α-thiocyanatoketone, reacts with RNH3OAc/Al2O3 to give the final product, 2-aminothiazoles, in good yield and allyl bromide reacts with KSCN/SiO2 and the product, allyl isothiocyanate, reacts with RNH3OAc/Al2O3 to give N-allylthiourea. [Copyright &y& Elsevier]

Published
2006
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