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- Title
Trennung und absolute Konfiguration der C(8)-epimeren (all- E)-Neochrome (Trollichrome) und -Dinochrome.
- Authors
Märki-Fischer, Edith; Buchecker, Richard; Eugster, Conrad Hans
- Abstract
Separation and Absolute Configuration of the C(8)-Epimeric (app- E)-Neochromes (Trollichromes) and -Dinochromes The C(8′)-epimers of (all- E)-neochrome were separated by HPLC and carefully characterized. The faster eluted isomer, m.p. 197.8-198.3°, is shown to have structure 3 ((3 S,5 R,6 R,3′ S,5′ R,8′ R)-5′,8′-epoxy-6,7-dodehydro-5,6,5′,8′-tetrahydro-β,β-carotene-3,5,3′-triol). To the other isomer, m.p. 195-195.5°, we assign structure 6, ((3 S,5 R,6 R,3′ S,5′ R,8′ R)-5′,8′-epoxy-6,7-didehydro-5,6,5′,8′-tetrahydro-β,β-carotene-3,5,3′-triol). The already known epimeric dinochromes (= 3- O-acetylneochromes) can now be formulated as 4 and 5, ('epimer 1' and its trimethylsilyl ether) and 7 and 8, ('epimer 2' and its trimethylsilyl ether), respectively.
- Publication
Helvetica Chimica Acta, 1984, Vol 67, Issue 2, p461
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19840670216