Chemistry of the Coccoidea. V. Synthesis of 2-acetylemodin and of deoxyerythrolaccin

Abstract

The anthraquinones 2-acetylemodin and deoxyerythrolaccin have been synthesized, the former for the first time, by processes involving addition of 1,1-diethoxyethene to appropriately substituted naphthoquinones. These coccid pigments are based on polyketide systems incorporating respectively the 1,3,8- and 1,3,6-trihydroxyanthraquinone skeletons.