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- W2950458165 abstract "-Chemical transformations started from tabersonine were studied. A one-pot oxidative ring-transformation with permaleic acid in methanol yielded 17,18-dehydrovincamine. Hydroboration-oxidation of the latter compound led to alkaloid 17,18-dehydrovincamone. Hydroboration-oxidation of tabersonine resulted 14β-hydroxyvincadifformine and 15β-hydroxyvincadifformine. Allowing 14β- and 15β- hydroxyvincadifformines to react with permaleic acid/methanol provided 1,14-secovincamines, serving as new evidence for the mechanism of the aspidospermane-ebumane transformation. On the other hand 18β-hydroxyvincamine was obtained from 14β-hydroxyvincadifformine by reaction with 3-chloroperbenzoic acid and successive treatment with triphenylphosphine/aqueous acetic acid." @default.
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- W2950458165 date "2007-01-01" @default.
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- W2950458165 title "Synthesis of 18-Hydroxyvincamines and Epoxy-1,14-secovincamines; a New Proof for the Aspidospermane-Eburnane Rearrangement" @default.
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- W2950458165 doi "https://doi.org/10.3987/com-07-11114" @default.
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