[EN] METHODS OF CHEMICAL SYNTHESIS OF DIAMINOPHENOTHIAZINIUM COMPOUNDS INVOLVING THE USE OF PERSULFATE OXIDANTS [FR] PROCÉDÉS DE SYNTHÈSE CHIMIQUE ET DE COMPOSÉS DE DIAMINOPHÉNOTHIAZINIUM IMPLIQUANT L'UTILISATION D'OXYDANTS DE PERSULFATE
[EN] METHODS OF CHEMICAL SYNTHESIS OF DIAMINOPHENOTHIAZINIUM COMPOUNDS INVOLVING THE USE OF PERSULFATE OXIDANTS [FR] PROCÉDÉS DE SYNTHÈSE CHIMIQUE ET DE COMPOSÉS DE DIAMINOPHÉNOTHIAZINIUM IMPLIQUANT L'UTILISATION D'OXYDANTS DE PERSULFATE
METHODS OF CHEMICAL SYNTHESIS OF DIAMINOPHENOTHIAZINIUM COMPOUNDS INVOLVING THE USE OF PERSULFATE OXIDANTS
申请人:Larch Christopher Paul
公开号:US20120058995A1
公开(公告)日:2012-03-08
This invention pertains generally to the field of chemical synthesis and purification, and more specifically to methods of synthesizing and purifying certain 3,7-diamino-phenothiazin-5-ium compounds (referred to herein as “diaminophenothiazinium compounds”) including Methylthioninium Chloride (MTC) (also known as Methylene Blue). In one embodiment, the e//i method comprises the steps of in order: a thiosulfonic acid formation (TSAF) as illustrated below, wherein the reaction is carried out in the presence of a thio sulfate and an oxidizing agent that is or comprises persulfate an oxidative coupling (OC); and a ring closure (RC). The resulting compounds and compositions comprising them (e.g., tablets, capsules) are useful in methods of medical treatment and diagnosis, etc., for example, tauopathies, or Alzheimer's disease (AD).