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- W1965388637 abstract "Abstract The first synthesis of four natural triterpene saponins, which exhibit significant antitumor activities, was concisely achieved by adopting a stepwise glycosylation. The key intermediate 13 was afforded via Bu2SnO-mediated regioseletive benzoylation. During the preparation of the target compounds, it was found that the α-L-arabinopyranosyl unit in intermediates 17 and 20 existed in the unusual 1 C 4 conformation, and after removing the benzoyl groups, the α-L-arabinopyranosyl unit was normal in a typical 4 C 1 form. Keywords: Antitumor activitiesBu2SnO-mediated regioseletive benzoylationglycosylationglycosyl trichloroacetimidatetriterpene saponins ACKNOWLEDGMENT This work is supported by the National Basic Research Program of China (30701046)." @default.
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- W1965388637 date "2011-01-25" @default.
- W1965388637 modified "2023-10-03" @default.
- W1965388637 title "Facile Synthesis of Four Natural Triterpene Saponins with Important Antitumor Activity" @default.
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- W1965388637 doi "https://doi.org/10.1080/00397910903576602" @default.
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