An efficient synthesis of the 1,l'-dihydroxy-2,2'-(thiodimethy1ene)bis-9(10H)-
anthrone (5) is described. Reaction of 1 -methoxy-2-(bromomethy1)-9,lOanthraquinone
(1) with excess sodium sulfide in ethanol, demethylation to the
corresponding hydroxy and subsequent selective reduction produced the title compound
in high yield.
