Disclosed are methods of synthesis and/or purification of certain 3,7-diamino-phenothiazin-5-ium compounds (“diaminophenothiazinium compounds”) including Methylthioninium Chloride (MTC) (Methylene Blue), and the resulting high purity characterized by a purity greater than 98%, and very low levels of heavy metals and organic impurities Azure A, B, C and MVB. Also disclosed are methods of treatment of a tauopathy or methemoglobinemia in a patient in need thereof, comprising administering to the patient a therapeutically effective amount of the high-purity diaminophenothiazinium compound.
本发明涉及一种合成和/或纯化某些3,7-二
氨基
苯并噻吩-5-ium化合物(“二
氨基
苯并噻吩-5-ium化合物”)的方法,包括
氯甲亚绿(
亚甲蓝)的甲
硫氧化物(Methylthioninium Chloride,
MTC),并且所得到的高纯度具有大于98%的纯度,并且重
金属和有机杂质Azure A、B、C和MVB的
水平非常低。本发明还涉及一种治疗需要治疗tau病理或高
铁血红蛋白血症的患者的方法,包括向患者施用治疗有效量的高纯度二
氨基
苯并噻吩-5-ium化合物。