
%0 Journal Article
%A Cameron, Donald W. 
%A Caliskan, Ece 
%A Griffiths, Peter G. 
%T Synthesis of Homophthalates from Allenic Diesters: Conversion into Viocristin and Analogues, and Application to 6-Methylpretetramid.
%J Australian Journal of Chemistry
%D 2000/02/04
%V 52
%N 11
%P 1013-1020
%K 
%R https://doi.org/10.1071/CH99065
%U https://www.publish.csiro.au/paper/CH99065 
%X Oxy-substituted homophthalic anhydrides have been synthesized by cycloaddition of di- and tri-oxy butadienes to the allenic diester (1). By base-catalysed cycloaddition to appropriate benzoquinones they have afforded new syntheses of viocristin (19), isoviocristin (20) and analogous 1,4-anthraquinones. Related chemistry has led to the naphthalene (34) and the anhydride (35), intermediates in published syntheses of semivioxanthin and 6- methylpretetramid respectively. 
