
%0 Journal Article
%A Elix, JA 
%A Elix, JA 
%A Naidu, R 
%A Naidu, R 
%A Laundon, JR 
%A Laundon, JR 
%T The Structure and Synthesis of 4-Oxypannaric Acid 2-Methyl Ester, a Dibenzofuran From the Lichen <I>Leproloma diffusum</I>
%J Australian Journal of Chemistry
%D 1994/04/01
%V 47
%N 4
%P 703-714
%K 
%R https://doi.org/10.1071/CH9940703
%U https://www.publish.csiro.au/paper/CH9940703 
%X The structure of the major dibenzofuran present in the lichen Leproloma diffusum has been shown to be that of 4-oxypannaric acid 2-methyl ester (2-methyl hydrogen 3,4,9-trihydroxy-1,7-dimethyldibenzofuran-2,6-dicarboxylate) (2). The structure of (2) was confirmed by total synthesis, achieved through a biomimetic-type approach using palladium(II) acetate in the key cyclization step. Partial synthesis of the corresponding dimethyl ester (8) was effected starting from natural pannaric acid 6-methyl ester (6). 
