
%0 Journal Article
%A Elix, JA 
%A Musidlak, HW 
%A Sala, T 
%A Sargent, MV 
%T Structure and synthesis of some lichen xanthones
%J Australian Journal of Chemistry
%D 1978/01/01
%V 31
%N 1
%P 145-155
%K 
%R https://doi.org/10.1071/CH9780145
%U https://www.publish.csiro.au/paper/CH9780145 
%X The xanthones 1-hydroxy-3,6-dimethoxy-(2), 2,4-dichloro-1,3-dihydroxy- 6-methoxy-(6), 2-chloro-1,3-dihydroxy-6-methoxy- (7), 4-chloro-1,3- dihydroxy-6-methoxy- (8) and 2-chloro-1-hydroxy-3,6-dimethoxy-8-methyl-9H-xanthen-9-one (11) were isolated from the lichen Pertusaria sulphurata Mull. Arg. The unambiguous synthesis of compounds (6), (7), (8), (11) and some other chloroxanthones, and the chlorination of 1,3- dihydroxy-6-methoxy-8-methyl-9H-xanthen-9-one (5), are described. 
