申请人:Kovi Ravishanker
公开号:US20080281127A1
公开(公告)日:2008-11-13
A process for the preparation of isosulfan blue (Active Pharmaceutical Ingredient) is provided. A process is also provided for preparation of the intermediate, 2-chlorobenzaldehyde-5-sulfonic acid, sodium salt of formula (2), used in the preparation thereof and a procedure for the isolation of benzaldehyde-2,5-disulfonic acid, di-sodium salt of the formula (3). Also provided is a process for the preparation of an isoleuco acid of formula (4), which upon mild oxidation gives rise to isosulfan blue of pharmaceutical grade which can be used for preparation of pharmaceutical formulations. The isolation and purification procedures provided in the process provide substantially pure isosulfan blue with HPLC purity 99.5% or greater.
提供了一种制备异磺蓝(活性药用成分)的方法。还提供了一种制备中间体2-氯苯甲醛-5-磺酸钠盐(式(2))的方法,该中间体用于制备,并提供了一种分离苯甲醛-2,5-二磺酸二钠盐(式(3))的程序。还提供了一种制备异亮氨酸的方法(式(4)),经轻度氧化后可得到药用级别的异磺蓝,可用于制备药物配方。在该过程中提供的分离和纯化程序可提供具有HPLC纯度为99.5%或更高的几乎纯净的异磺蓝。