56 クロキ樹皮成分の研究(第4報) : Symplocosisigenolの構造について

概要

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1) From the results of some degradation studies on the aglucone, symplocosigenol, and its alkyl derivatives we obtained the following information;[table]2) On the action of mineralicacid, dinitro-symplocosigenol-dimethylether (m. p. 162-163.5°) converts itself into its dimorph, dinitro-epi-symplocosigenol-dimethylether (m. p. 178-179℃), and the latter becomes again the former on several recrystallization.3) Thecomparisons of a few physical constants of the symplocosigenol-series with one of the forsythigenol-series and other lignane homologues are shown in the following tables.[table][table][table]4) It is concluded that symplocosigenol-dimethylether is a diastereoisomer of pinoresinol-dimethylether and an enantiostereoisomer of forsythigenol-methylether, and free symplocosigenol has, accordingly, the most probable structure of the next illustration.[figure]
日本森林学会の論文
1951-10-25