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Dive into the research topics where Yoshihito Fujihara is active.

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Featured researches published by Yoshihito Fujihara.


Bulletin of the Agricultural Chemical Society of Japan | 1995

Synthesis of (+)-Aromadendrene Derivatives as Physiologically Active Substances.

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

Studies on the thermal decomposition of terpenes in mixed fused salts. VI. Thermal decomposition reaction of monocyclic and bicyclic monoterpene oxides in mixed fused salts.

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

Isolation and Synthesis of Cosmetic Substances from African Dietary Leaves, Celosia argentea L. for Skin Depigmentation

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

Antimicrobial and Tyrosinase Inhibitory Activities of 6-[(8Z)-8-Pentadecenyl]salicylic Acid Derivatives*1*2

Kazuo Kasemura; Masato Nomura; Takahiro Tada; Yoshihito Fujihara; Kenji Shimomura


Nippon Kagaku Kaishi | 1992

Studies on the Reaction of Terpenes in the Presence of Synthetic Zeolites. IX. Hydration of Several Monoterpene Hydrocarbons with Water in the Presence of Synthetic Zeolites.

Takashi Nomura; Yoshihito Fujihara; Hidekazu Takata; Takashi Hirokawa; Akio Yamada


Nippon Kagaku Kaishi | 1989

Studies on the reaction of terpenes in the presence of synthetic zeolites. VII. Special articles on zeolite chemistry and technology. Hydration of several sesquiterpene hydrocarbons with formic acid or water in the presence of synthetic zeolites.

Masato Nomura; Kazuto Hotta; Yoshihito Fujihara


Journal of Oleo Science | 2006

Synthesis and Physiological Activities of Monoterpene Carboxylic Acid Esters with Pyrones

Shinya Tachibana; Yuki Ohno; Yoshihito Fujihara; Yoshiharu Okada; Masaaki Sugiura; Shigeki Takagi; Masato Nomura


Journal of Japan Oil Chemists' Society | 2000

Condensation Reaction of Trans-Anethole Derivatives with Several Monoterpenyl Compounds and Their Inhibition Properties towards Tyrosinase, Superoxide Scavenging Activity and Hyaluronidase Activity

Masato Nomura; Kazuhiko Nishimura; Yoshihito Fujihara; Takahiro Tada; Fumihiro Hattori; Kenji Shimomura


Journal of Oleo Science | 2003

Miticidal Activity of Monoterpenyl Carboxypyrrolidinamides and Piperidinamides

Kazuo Kasemura; Shinji Fujita; Yoshiharu Okada; Yoshihito Fujihara; Masato Nomura


Journal of Oleo Science | 2003

Skin Whitening Effects of Estragole Derivatives

Yutaka Motoki; Shinji Fujita; Yoshihito Fujihara; Yoshiharu Okada; Masato Nomura

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Toshio Inoue

Nihon Pharmaceutical University

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