Structural and Stereochemical Studies on Brominated Meroterpenoids From the Dictyoceratid Sponge Cacospongia sp
In: Australian Journal of Chemistry, Jg. 43 (1990), S. 2009-2009
Online
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Zugriff:
The structures of seven minor metabolites, (5)-(11), from the encrusting sponge Cacospongia sp. Were deduced by 1H, 13C and mass spectrometric data. Compounds (5)-(7) are hydroxy derivatives of the previously isolated tribromocacoxanthene (1); their relative stereochemistry was determined from 1H-1H coupling information. Compounds (8)-(11) represent an alternative cyclization mode of a cyclocymopol-related precursor (15) and possess a spiro-fused bicyclic ring system; the relative stereochemistry of (8)-(10) was deduced by 1H n.O.e. difference spectroscopy. The biological role of brominated meroterpenoids in Cacospongia sp. is discussed.
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Structural and Stereochemical Studies on Brominated Meroterpenoids From the Dictyoceratid Sponge Cacospongia sp
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Autor/in / Beteiligte Person: | Liokas, V ; Garson, Mary J. ; Faulkner, DJ ; Bali, Dkl |
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Zeitschrift: | Australian Journal of Chemistry, Jg. 43 (1990), S. 2009-2009 |
Veröffentlichung: | CSIRO Publishing, 1990 |
Medientyp: | unknown |
ISSN: | 0004-9425 (print) |
DOI: | 10.1071/ch9902009 |
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