Yoshihito Fujihara
Kindai University
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Featured researches published by Yoshihito Fujihara.
Bulletin of the Agricultural Chemical Society of Japan | 1995
Masato Nomura; Masashi Kyouda; Toshio Inoue; Toshimasa Hamada; Yoshihito Fujihara
(+)-Aromadendrene 1 was converted to derivatives by hydration with formic acid, addition of an alcohol (methanol, ethanol, or 1-propanol) in the presence of a synthetic zeolite, or oxidation with lead tetraacetate. Hydration of 1 with formic acid in the presence of 3 A zeolite gave (+)-globulol 5 as at least 68.2% of the hydration product. With 2020 AH zeolite, the addition of an alcohol to 1 gave (+)-10-alcoxy aromadendranes 6-8 as the main products. Oxidation of 1 with lead tetraacetate gave (+)-aromadendrane-10, 14-diol 10 in a high yield (72.4%). Diol 10 was treated in a pyridinium dichromate solution to gave the corresponding ketone 11. This compound was a useful intermediate for further synthesis, and was condensed with ethylene glycol, 1, 2-ethanedithiol, or 1, 3-propanedithiol to gave acetal compounds 12-14. Compounds 5 and 12 inhibited the growth of Bacillus subtilis and Staphylococcus aureus.
Nippon Kagaku Kaishi | 1988
Masato Nomura; Yoshihito Fujihara
単環式および二環式モノテルペンオキシド類について硝酸塩系溶融塩(NaNO2/NaNO3/KNO3)および塩化物系溶融塩(ZnCl2/KCl/NaCl)中での熱分解反応を行ない,2種の無機混合溶融塩の相違と反応温度との関係について検討するとともに,反応生成物の選択性についても検討した。その結果,塩化物系溶融塩を用いた場合,trans-リモネン-1,2-オキシド[1]からは反応温度310℃の条件下においてネオおよびイソジヒドロカルボン[7],[8]の2成分(2:3)のみが得られる最適条件を見いだすことができた。1,2-エポキシ-4-p-メンテン[3]からは反応温度200℃ の条件下において4-p-メンテン-2-オン[17]が77%の生成比を占めた。2-ピネンオキシド[4]からはα-カンホレンァルデヒド[18]とピノカルボン[19]の2成分を生成物中,最高97%の生成比で得ることができた。また,2(10)-ピネンオキシド[5]からはいずれの溶融塩においてもミルタナール[21]が主成分として得られることが判明した。
Journal of Oleo Science | 2002
Akiyoshi Sawabe; Masato Nomura; Yoshihito Fujihara; Takahiro Tada; Fumihiro Hattori; Satoko Shiohara; Kenji Shimomura; Yoshiharu Matsubara; Tadashi Okamoto; Saburou Kawamura
Journal of Oleo Science | 2002
Kazuo Kasemura; Masato Nomura; Takahiro Tada; Yoshihito Fujihara; Kenji Shimomura
Nippon Kagaku Kaishi | 1992
Takashi Nomura; Yoshihito Fujihara; Hidekazu Takata; Takashi Hirokawa; Akio Yamada
Nippon Kagaku Kaishi | 1989
Masato Nomura; Kazuto Hotta; Yoshihito Fujihara
Journal of Oleo Science | 2006
Shinya Tachibana; Yuki Ohno; Yoshihito Fujihara; Yoshiharu Okada; Masaaki Sugiura; Shigeki Takagi; Masato Nomura
Journal of Japan Oil Chemists' Society | 2000
Masato Nomura; Kazuhiko Nishimura; Yoshihito Fujihara; Takahiro Tada; Fumihiro Hattori; Kenji Shimomura
Journal of Oleo Science | 2003
Kazuo Kasemura; Shinji Fujita; Yoshiharu Okada; Yoshihito Fujihara; Masato Nomura
Journal of Oleo Science | 2003
Yutaka Motoki; Shinji Fujita; Yoshihito Fujihara; Yoshiharu Okada; Masato Nomura