70 クロキ樹皮成分の研究(第5報) : 主としてSymplocosigenolの構造式確認について

概要

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On the action of methanol solution of hydrochloric acid, symplocosigenol-dimethylether (m. p. 128.5℃.) gave two crystalline products. One of them was decided to be a known compound, eudesmin, through the comparison of certain physical constants of its dinitro-derivative. The other product, m. p. 133-134℃., was assumed to be epieudemin, which have been obtained through the cleavage of the methylenedioxybridge of l-asarinin following diazomthane-methylation in 1937 by Dr. Kaku and Ri.On the further investigation of hydrolysis of symplocosin, we found that epieudesmin and one more crystalline product, m. p. 140-141.5℃., were produced by this procedure in each small yield.It seems to be proper that in the symplocosigenol-molecule, asymmtric α-carbon atom plays a great role on the alternation of the steric configuration.
日本森林学会の論文
1951-12-25