著者

福山 愛保 江角 朋之

出版者

社団法人 有機合成化学協会

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.65, no.6, pp.585-597, 2007-06-01 (Released:2010-10-20)

参考文献数

37

被引用文献数

9 17

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Plants producing natural products remain one of the few sources of drug discovery, yielding unorthodox and often unexpected chemical structures. Since some classes of plant-derived natural products are frequently concentrated on the same genus, the extensive chemosystematic studies of the specific plants serve as a chemical library to discover candidates for drugs or biological probes for physiological studies. Vibsane-type diterpenes belong to rarely occurring natural products since they have been elaborated solely in Viburnum species such as V. awabuki, V odoratissimum, and V. suspensum. These diterpenes are further classified into 11-membered ring, 7-membered ring and rearranged (neovibsanin) types, thus putting their chemical diversity into a unique chemical library. We describe a variety of vibsanes, chemical correlations between three subtypes, and synthetic studies of vibsanin F, the simplest 11-membered ring vibsane, as well as neurotrophic activities of neovibsanins A-B.

著者

今村 寿一 青葉 千春 小島 邦彦

出版者

社団法人 有機合成化学協会

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.45, no.9, pp.909-913, 1987-09-01 (Released:2009-11-13)

参考文献数

60

被引用文献数

1 4

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Tetramethylammonium hydroxide (TMAH) is a relatively strong base among organic compounds, and decomposes at 130-140°C into gaseous substances (Me3N, Me2O, MeOH, and H2O). TMAH has been prepared by alkali treatment of tetramethylammonium chloride (TMAC) obtainable from trimethylamine and methyl chloride, but use is made recently of developer electrolysis of TMAC in the presence of ion exchange membrane. The latter method gives rise to a highly pure TMAH aqueous solution free from chloride anions. TMAH currently finds some utilities in the production of highly functional materials such as developer for positive-working photoresist and the surface treatment of fibers, glasses, and plastics, and also as reagent for the methyl esterification of fatty acids and phospholipids, reagent for organic synthesis and preparation of catalysts, etc.

著者

太田 暢人

出版者

社団法人 有機合成化学協会

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.15, no.3, pp.121-128, 1957 (Released:2010-10-20)

参考文献数

25