The present invention relates to chemical synthesis and purification. Specifically, the present invention relates to a novel and improved method of synthesizing high purity diaminophenothiazine compounds of Formula I, specifically Methylene Blue and its pharmaceutically acceptable salt or hydrates thereof. The present invention relates to an improved method of synthesizing Methylene Blue compound of higher purities than those achievable by using known methods of synthesis as per the requirements of the international pharmacopoeias like USP and EP.
本发明涉及
化学合成和纯化。具体来说,本发明涉及一种新颖且改进的方法,用于合成高纯度的二
氨基苯
噻嗪化合物(
化学式I),特别是
亚甲蓝及其药用可接受盐或
水合物。本发明涉及一种改进的方法,用于合成比使用已知合成方法更高纯度的
亚甲蓝化合物,以满足国际药典如美国药典和欧洲药典的要求。