A High Yield Easy Method for the Preparation of Alkoxy-Substituted Triphenylenes

2,3,6,7,10,11-Hexamethoxytriphenylene is prepared by oxidative trimerization of 1,2-dimethoxybenzene (veratrol) with iron(III) chloride/sulfuric acid in nearly quantitative yield. The obtained crude product is almost pure. Other alkoxy-substituted triphenylenes are also synthesized by this method.