
TY  - JOUR
A1  - Kent, RA 
A1  - Smith, IR 
A1  - Sutherland, MD 
T1  - Pigments of marine animals. X. Substituted naphthopyrones from the crinoid <I>Comantheria perplexa</I>
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1970
VL  - 23
IS  - 11
SP  - 2325
EP  - 2335
KW  - 
UR  - https://doi.org/10.1071/CH9702325 
N2  - Acetone extraction of the flesh of the comatulid crinoid Comantheria perplexa (H. L. Clark) yields a mixture of substances from which the sodium salt of the sulphuric ester (12) of 8-hydroxy-5,6-dimethoxy-2-methyl-4H-naphtho[2,3-b]pyran-4-one (8) has been isolated. Acid hydrolysis of (12) yields the phenol (8) which on methylation is converted into rubrofusarin dimethyl ether and on partial demethylation yields a product identical with a dehydration product (10) of fonsecin.    Hydrolysis of the crude extract from C. perplexa yields (8), (10), and 8-hydroxy-5,6-dimethoxy-2-n-propyl-4H-naphtho[2,3-b]pyran-4-one (13). The structures of the isolated substances suggest a polyketide-type synthetic activity by this species.    The stalked crinoids Endoxocrinus parrae (Gervais) and Neocrinus decorus (Wyville Thomson) yield negligible quantities of aromatic polyketides. 
ER  -

