
%0 Journal Article
%A Anand, SM 
%A Jain, AC 
%T Synthesis of 8-deoxygartanin. Trapezifolixanthone and related xanthones
%J Australian Journal of Chemistry
%D 1974/07/01
%V 27
%N 7
%P 1515-1520
%K 
%R https://doi.org/10.1071/CH9741515
%U https://www.publish.csiro.au/paper/CH9741515 
%X Reaction of 1,3,5-trihydroxyxanthone (6) with 3-methylbut-2-enyl bromide in the presence of methanolic sodium methoxide yields a mixture of 2,4-di(3-methylbut-2-enyl)-5-(3-methylbut-2-enyloxy) derivative (7), natural 8-deoxygartanin (3) and the 2-(3-methylbut-2-eny1)-5-(3-methylbut-2-enyloxy) derivative (8). Cyclodehydrogenation of (3) and (8) with DDQ affords natural trapezifolixanthone (5) and 5-(3-methylbut-2-eny1oxy)-6-deoxyjacareubin (9) respectively. 
