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ChemInform Abstract: Efficient Chemical Conversion of Louisianin A to C and D, the Inhibitor of Angiogenesis.

โœ Scribed by T. SUNAZUKA; T. ZHI-MING; Y. HARIGAYA; S. TAKAMATSU; M. HAYASHI; K. KOMIYAMA; S. OMURA

Publisher
John Wiley and Sons
Year
2010
Weight
28 KB
Volume
28
Category
Article
ISSN
0931-7597

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โœฆ Synopsis

Efficient Chemical Conversion of Louisianin A to C and D, the Inhibitor of Angiogenesis.

-The title compounds (IV) and (V) show inhibitory activity on the growth of vascular cells. They can be isolated only in small amounts from fermentation broth of Streptomyces sp. WK-4028. Thus, a synthetic procedure for the preparation of louisianin C (IV) and D (V) from the large amount of isolated louisianin A (I) is developed. -(SUNAZUKA,

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โœ T. KUMAZAWA; N. ASAHI; S. MATSUBA; S. SATO; K. FURUHATA; J. ONODERA ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› John Wiley and Sons โš– 32 KB

Conversion of ฮฒ-D-C-Glucopyranosylphloroacetophenone to a Spiroketal Compound. -Treatment of the title aryl C-glycoside (II) with catalytic amounts of TosOH in aqueous media affords the novel spiroketal compound (III). This is the first demonstration of ring conversion in aryl C-glycoside. -(KUMAZA