A method is described for preparing argatroban monohydrate obtained from (2R,4R)-1-[N
G
-nitro-N
2
-(3-methyl-8-quinolinesulphonyl)-L-arginyl]-4-methyl-2-piperidine carboxylic acid by suitably treating crude argatroban. The method either comprises preparation of argatroban monohydrate in a continuous step or an intermediate step of isolating a purified argatroban. Also obtainable from argatroban monohydrate is anhydrous argatroban, shown to have new physico-chemical characteristics.
The described argatroban synthesis and purification process hence enables three different forms of argatroban, not previously described, to be obtained, each with distinctive physico-chemical characteristics and in particular enables argatroban monohydrate to be obtained with high yield and with high purity, being therefore a product suitable for use as active principle in proprietary medicines.
本文描述了一种制备单
水合
阿加曲班的方法,该方法是通过适当处理粗制
阿加曲班从(2R,4R)-1- [NG-硝基-N2-(3-甲基-8-
喹啉磺酰)-L-精
氨酰] -4-甲基-2-
哌嗪羧酸中获得的。该方法包括在连续步骤中制备单
水合
阿加曲班或隔离纯化
阿加曲班的中间步骤。从单
水合
阿加曲班中还可以得到无
水阿加曲班,其具有新的物理
化学特性。因此,所述的
阿加曲班合成和纯化过程使得可以获得三种不同形式的
阿加曲班,这些形式以其独特的物理
化学特性而闻名,特别是使得可以高产高纯地获得单
水合
阿加曲班,因此适用于专有药物中的活性成分。