51 細辛のネオリグナン

概要

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Two new neolignans (Asatone (I) and Isoasatone (II)) have been isolated from the plart Asarum taitonense Hayata growing in Taiwan, and their structures also been determined. In particular, the former was photochemically converted into isoasatone, whise structure was elucidated by means of an X-ray crystallographic analysis. In the next step, these two new neolignans and their derivatives were subjected to photochemical, thermal and acid-catalysed reactions, Biogenesis of these neolignans is also discussed, and 4H-asatone (VI) has been synthesized in the light of the above biogenetic consideration. Finally, from a chemotaxonomical aspect, we further examined the chemical constituents of the plants belonging to the Asarum, Asiasarum and Heterotropa genera, and could detect asatone (I) in four species.
天然有機化合物討論会の論文
1975-10-01