Color Reaction Mechanism of Anthrone with Sugars. (2). Some Reaction Products of Furfural with Anthrone (Organic Analysis. XLVII)

A crystalline dye was separated from the reaction mixture of anthrone with furfural or xylose in sulfuric acid, and its probable structure was presented. The same dye was also yielded by condensing anthrone to another dye which was separated from the reaction mixture of the same reagents in phosphoric acid.