The formation and stability of flavans w
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Johan Coetzee; Elfranco Malan; Daneel Ferreira
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Article
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1999
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Elsevier Science
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French
β 292 KB
Treatment of 4J$-chloroepioritin tri-O-methylether with phenylmethanethiol under neutral conditions affords both the 4a-and 4[~-substituted epioritin derivatives. The stereochemical course of the reaction is of relevance to the thiolysis of 5-oxy (A-ring) proanthocyanidins and to the conspicuous sta