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The introduction of the C10‐stereocenter of (ox‐)anthrones by plant organisms is not stereospecific. Consequently, often, both (10S)‐ and (10R)‐diastereomers can be found in the same plant. Motivated by the importance of a correct assignment of the configuration at C10, this study revisits the nuclear magnetic resonance and electronic circular dichroism‐based empirical rules for the determination...
Rationale
Anthrone and oxanthrone are important anthraquinone derivatives present in medicinal plants which are used in therapeutics as laxatives. Some of these plants need to be stored at least one year before they can be used in order to oxidize anthrones into oxanthrones, so to avoid severe diarrhea and dehydration. Therefore, this work aimed to characterize fragmentation reactions between these...
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