Reductive aromatization of quinols: synthesis of the C-arylglycoside nucleus of the papulacandins and chaetiacandin. 
[reaction: see text] Nucleophilic 1,2-addition of lithiated glycal 9b to functionalized quinone 7 provided, after reductive aromatization, C-arylglycoside 11b.  Treatment with mCPBA afforded the tricyclic papulacandin framework.  Alternatively, hydroboration gave the chaetiacandin nucleus.