申请人:Takano Daisuke
公开号:US20100191020A1
公开(公告)日:2010-07-29
An object of the present invention is to provide a process for producing high-purity hydroxytriphenylenes in which not only inexpensive raw materials can be used but also no complicated steps of deprotection such as dealkylation, and reduction and the like are necessary, and which is thereby advantageous in industrial production. Also there is provided a novel crystal of 2,3,6,7,10,11-hexahydroxytriphenylene monohydrate, which has satisfactory thermal stability. The process 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 comprising a metal selected from trivalent iron, pentavalent vanadium and hexavalent molybdenum and of a nonvolatile strong acid:
wherein, Rs are each independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms.
本发明的目的是提供一种生产高纯度羟基三苯乙烯的方法,该方法不仅可以使用廉价的原材料,而且不需要复杂的去保护步骤,例如去烷基化、还原等,因此在工业生产中具有优势。此外,还提供了一种新型的2,3,6,7,10,11-六羟基三苯乙烯单水合物晶体,具有满意的热稳定性。生产通式(2)化合物的方法的特点是在非挥发性强酸和三价铁、五价钒和六价钼等金属氧化物的存在下,使通式(1)化合物发生反应:其中,Rs各自独立地是氢原子、卤素原子、具有1至3个碳原子的烷基或具有1至3个碳原子的烷氧基。