PROCESS FOR PRODUCING TRIPHENYLENE COMPOUND AND CRYSTAL OBTAINED BY THE PROCESS

摘要

A process for producing a high-purity hydroxytriphenylene compound in which not only inexpensive raw materials can be used but no complicated steps such as protective-group elimination, e.g., dealkylation, and reduction are necessary. It is advantageous in industrial production. Also provided is a novel crystal of 2,3,6,7,10,11-hexahydroxytriphenylene monohydrate which has satisfactory thermal stability. The process, which is for producing a compound represented by the general formula (2), is characterized by reacting a compound represented by the general formula (1) in the presence of a metal oxide containing a metal selected among trivalent iron, pentavalent vanadium, and hexavalent molybdenum and of a nonvolatile strong acid. (In the formula (1), the two R's each independently represents hydrogen, halogeno, C1-3 alkyl, or C1-3 alkoxy.)