
%0 Journal Article
%A Russell, RAVEG 
%A Warrener, RN 
%T Isobenzofulvenes. VII. Regio- and site-selective cycloadditions and their potential in anthraquinone synthesis
%J Australian Journal of Chemistry
%D 1981/01/01
%V 34
%N 1
%P 131-141
%K 
%R https://doi.org/10.1071/CH9810131
%U https://www.publish.csiro.au/paper/CH9810131 
%X The regiochemistry of the cycloaddition of the 4-methoxyisobenzofulvene (8a) with 5- and 6-chloro- 2-methyl-1,4-benzoquinones has been evaluated. The resulting cycloadducts have been converted into the known 5-methyl ethers of islandicin and digitopurpone. The concept and value of a 'ghost' substituent in controlling the regiochemistry of a cycloaddition is discussed in general and evaluated for a specific case. 
