Neuartige sesquiterpenlactone und neue acetylenverbingen aus Athanasia-arten |
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Authors: | Ferdinand Bohlmann Karl-Heinz Knoll |
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Institution: | Institut für Organische Chemie der Technischen Universität Berlin, Straße des 17. Juni 135, D-1000 Berlin 12, W. Germany |
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Abstract: | The investigation of two further South African Athanasia-species afforded, in addition to known compounds, sixteen new ones, ten guaianolides, an eudesmanolide, three sesquiterpenes, a new enediynene and a phenylpropane derivative. The structures were elucidated by extensive NMR-studies. Three of the lactones are very unusual in having an endoperoxide bridge; their structures, however, were elucidated only indirectly. These further chemical results on Athanasia again add support to the idea that these species might be better placed in the genus Pentzia. |
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Keywords: | Anthemideae Compositae new guaianolides endoperoxides new eudesmanolide new sesquiterpenes new phenylpropane derivative new acetylenic ester |
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