
%0 Journal Article
%A Capon, RJ 
%A Groves, DR 
%A Urban, S 
%A Watson, RG 
%T Spongiaquinone Revisited: Structural and Stereochemical Studies on Marine Sesquiterpene/Quinones From a Southern Australian Marine Sponge, <I>Spongia</I> sp.
%J Australian Journal of Chemistry
%D 1993/08/01
%V 46
%N 8
%P 1245-1253
%K 
%R https://doi.org/10.1071/CH9931245
%U https://www.publish.csiro.au/paper/CH9931245 
%X A chemical investigation of a large purple sponge, Spongia sp., from the Great Australian Bight, resulted in the isolation of a new sesquiterpene/quinone (8), together with the known compounds dehydrocyclospongiaquinone-1 (4) and spongiaquinone (2). The last compound was also isolated as the potassium salt (9), this being the first recorded account of a naturally occurring marine sesquiterpene/quinone salt. The structure for (8) was assigned by detailed spectroscopic analysis. A re-investigation into the stereostructure of spongiaquinone (2) resulted in the first unambiguous assignment of absolute stereochemistry, and uncovered the peculiar chiroptical properties of spongiaquinone (2) and its potassium salt (9). 
