松柏類及び近縁植物葉中のフラボノイドの研究 (第3報)
イチイ葉中のフラボノイド及びGinkgetin, Kayaflavone, Sciadopitysin, Sotetsuflavoneの関係
1958 年 78 巻 9 号 p. 1016-1019
詳細
1958 年 78 巻 9 号 p. 1016-1019
Sciadopitysin was obtained from the leaves of Taxus cuspidata SIEB. et ZUCC. (Taxaceae). It is known that this substance is also a monomethyl ether of ginkgetin, like kayaflavone, but the two are isomers, differing in the position of the methoxyl in the molecule. Decomposition of kayaflavone and sotetsuflavone with potassium hydroxide solution afforded a ketoflavone similar to that obtained from ginkgetin or sciadopitysin, and these are either methylated or demethylated compounds corresponding to the original substances. Considering these decomposition reactions, some presumptions were made on mutual relationship of these series of compounds, especially the position of methoxyl group.
