
TY  - JOUR
A1  - Gream, GE 
A1  - Riggs, NV 
T1  - Chemistry of Australian Lichens. II. A New Depsidone from <I>Parmelia conspersa</I> (Ehrh.) Ach
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1960
VL  - 13
IS  - 2
SP  - 285
EP  - 295
KW  - 
UR  - https://doi.org/10.1071/CH9600285 
N2  - A new compound, norlobaridone, from Parmelia conspersa is shown to have structure Ia by conversion of its monomethyl ether (lobaridone (Ib)) into lobariol (IIb). The depsidone ring is readily cleaved by basic reagents to give products containing a new cyclic system and including an isomeric &#947;-enol lactone (IIIa), norlobariol (IIa), and the oxime anhydride (IVa) of the latter. Ultraviolet and infra-red spectra support structural assignments. Norlobaridone (Ia) presents an exception to the acetate theory of biogenesis in the position of its ketonic oxygen atom. 
ER  -

