著者
首藤 紘一 岡本 敏彦
出版者
The Society of Synthetic Organic Chemistry, Japan
雑誌
有機合成化学協会誌 (ISSN:00379980)
巻号頁・発行日
vol.32, no.9, pp.670-686, 1974-09-01 (Released:2009-11-13)
参考文献数
95
被引用文献数
4 5

環境毒のうちでも発がん性物質ほど恐ろしいものはない.発がん性物質には天然起源のものに加えて, この半世紀の問の有機合成化学の進歩と共に産まれたものも少なくないし, 環境汚染の問題が日を追って重大になっていく昨今, 発がん性物質への理解を高めることは, 合成化学者にとっても, いろいろな意味で必要と思われる.また, ここ数年間の発がん物質の化学・生化学の進歩により, 有機化学的な理解が可能になり, 同時に, ますます有機化学の寄与が求められているのが現状である.本稿では, 化学物質による発がんについての近年の考え方と, 発がん物質の分類と反応性について, 化学的立場からまとめてみたい.
著者
落合 英二 岡本 敏彦
出版者
The Pharmaceutical Society of Japan
雑誌
Chemical and Pharmaceutical Bulletin (ISSN:00092363)
巻号頁・発行日
vol.7, no.5, pp.556-559, 1959-07-20 (Released:2008-03-31)
被引用文献数
3 7

The results of dehydrogenation of anhydroignavinol and oxidation of des-N-methyl-anhydroignavinol are discussed and tentative structures for anhydroignavinol and ignavine are presented.
著者
永倉 正彦 岡本 敏彦
出版者
公益社団法人 日本薬学会
雑誌
YAKUGAKU ZASSHI (ISSN:00316903)
巻号頁・発行日
vol.92, no.2, pp.167-175, 1972-02-25 (Released:2008-05-30)
参考文献数
15
被引用文献数
1 1

An addition-elimination reaction, which was reported in the reaction of 3-nitroquinoline with aqueous sodium hypobromite in methanolic KOH, also occurred in the case of other nitroquinolines, i.e., 6-, 5-, 8-, and 4-nitroquinolines. 6-Nitroquinoline (I) gave 6-bromo-5-methoxyquinoline (IIa), 6, 8-dibromo-5-methoxyquinoline (IIb), 6-bromo-5, 7-dimethoxyquinoline (IIIa), 5, 7-dimethoxy-6-nitroquinoline (IIIb), 8-bromo-5, 7-dimethoxy-6-nitroquinoline (IIIc), and 8-bromo-6-oxo-5, 5, 7-trimethoxy-5, 6-dihydroquinoline (IV) on being reacted in the same way as in the reaction of 3-nitroquinoline. Other nitroquinolines and their products from the same reaction were ; 5-nitroquinoline (XI); 5-bromo-6-methoxyquinoline (XIIa), 6-methoxy-5-nitroquinoline (XIIb), 8-methoxy-5-nitroquinoline (XIIIa), 5, 7-dibromo-6, 8-dimethoxyquinoline (XIVa), and 6, 8-dimethoxy-5-nitroquinoline (XIVb). 8-Nitroquinoline (XVIII); 8-bromo-7-methoxyquinoline (XIX), 5-methoxy-8-nitroqninoline (XX), and 6-bromo-5, 7-dimethoxy-8-nitroquinoline (XXI). 4-Nitroquinoline (XXII); 4-bromo-3-methoxyquinoline (XXIIIa), 3-methoxy-4-nitroquinoline (XXIIIb), 2, 3-dimethoxy-4-nitroquinoline (XXIV) and 4-methoxyquinoline (XXV). The reaction of 2-nitroquinoline (XXX) gave only 2-methoxyquinoline (XXXI).
著者
坂井 進一郎 高山 広光 岡本 敏彦
出版者
公益社団法人日本薬学会
雑誌
藥學雜誌 (ISSN:00316903)
巻号頁・発行日
vol.99, no.6, pp.647-656, 1979-06-25

Reinvestigation of the alkaloidal constituents of Aconitum japonicum THUNB. of Mt. Takao (Tokyo) was made. In addition to the reported constituents, i.e. isohypognavine, delcosine and dehydrodelcosine, two known compounds, isotalatizidine and condelphine, were isolated. Furthermore, five new bases, i.e. 11-acetylisohypognavine, diacetylisohypognavine, 14-acetyltalatizamine, takaosamine and takaonine, were isolated and their structures were elucidated. Takaosamine was proved to be 18-O-demethyldelcosine from the spectroscopic study on the parent material and the acetyl derivatives, and from the chemical correlation with known diterpene alkaloids, gigactonine and delsoline. The structure of takaonine was deduced to be 2,3-dehydro-14-dehydrodelcosine on the basis of ^<13>C-nuclear magnetic resonance spectral evidence and the derivation to the known diterpene alkaloid, delcosine, by catalytic hydrogenation.