
%0 Journal Article
%A Gill, M 
%A Kiefel, MJ 
%A Lally, DA 
%A Ten, A 
%T Pigments of Fungi. XV. An Efficient, Unambiguous Route to Unsymmetrically Substituted Dibenzyl Acyloins and Their Use in the Synthesis of Fungus Pigments of the Pulvinone and Grevillin Types
%J Australian Journal of Chemistry
%D 1990/09/01
%V 43
%N 9
%P 1497-1518
%K 
%R https://doi.org/10.1071/CH9901497
%U https://www.publish.csiro.au/paper/CH9901497 
%X Dibenzyl acyloins including those bearing unsymmetrically disposed aryl residues are assembled in high yield by reaction between the O-trimethylsilyl ethers of arylacetaldehyde cyanohydrins and benzyl Grignard reagents. These acyloins are deprotonated with lithium diisopropylamide to afford alcoholate-enolate dianions which can be made to react with carbonyldiimidazole and with oxalyldiimidazole, respectively, to ultimately afford fungus pigments of the pulvinone and grevillin types. 
