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Chemistry of the Ginkgolides, IX. Ozonolysis of (10R)-10-Acetoxy-3,14-didehydroginkgolide

✍ Scribed by Weinges, Klaus ;Schick, Hartmut ;Irngartinger, Hermann ;Oeser, Thomas

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 214 KB
Volume: 1997
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.199719970818

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✦ Synopsis

Abstract

Ozonolysis of (10__R__)‐10‐acetoxy‐3,14‐didehydroginkgolide (1) did not lead to the expected α‐hydroxy ketone 3b. Instead, ring‐opening of the acetal ring C occurred leading, after acetylation, to the spiroacylal 2. Its structure was confirmed by crystal structure analysis.

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