申请人:The Dow Chemical Company
公开号:US05399768A1
公开(公告)日:1995-03-21
The present invention relates to a method of preparing 4,6-diaminoresorcinol from 1,2-dichloro-3,5-dinitrobenzene comprising the steps of: (a) contacting 1,2-dichloro-3,5-dinitrobenzene with a hydroperoxide in the presence of anhydrous base to form 2,3-dichloro-4,6-dinitrophenol; (b) contacting 2,3-dichloro-4,6-dinitrophenol with a hydroxy-containing compound to form 2-chloro-4,6-dinitroresorcinol; and (c) converting 2-chloro-4,6-dinitroresorcinol to 4,6-diaminoresorcinol, which is isolated as a salt or other stabilized form thereof,
本发明涉及一种从1,2-二氯-3,5-二硝基苯制备4,6-二氨基间苯二酚的方法,包括以下步骤:(a)在无水碱存在下,将1,2-二氯-3,5-二硝基苯与过氧化氢接触,形成2,3-二氯-4,6-二硝基苯酚;(b)将2,3-二氯-4,6-二硝基苯酚与含有羟基的化合物接触,形成2-氯-4,6-二硝基邻苯二酚;(c)将2-氯-4,6-二硝基邻苯二酚转化为4,6-二氨基间苯二酚,其以盐或其他稳定形式分离。