Regiospecific synthesis of bis(quinone monoacetals) and their annelation to give bisanthraquinones

Abstract
The anodic oxidation of bis-(p-methoxyphenol) derivatives bearing methoxymethyl, methoxyethoxymethyl, or t-butyldimethylsilyl protecting groups affords regiospecifically bis-dienones which can be annelated with anions derived from 3-cyanophthalides to yield bisanthraquinones and bisanthracyclinones.

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