申请人:Parthasaradhi Reddy Bandi
公开号:US20100174087A1
公开(公告)日:2010-07-08
The present invention provides an improved and commercially viable process for preparation of substantially enantiomerically pure esomeprazole in neutral form or as a pharmaceutically acceptable salt or as its solvates including hydrates. Thus, for example, a compound containing a mixture of 1-(S)-camphorsulfonyl-5-methoxy-2-[(3,5-dimethyl-4-methoxy-2-pyridyl)methyl-(S)-sulfinyl]-1H-benzimidazole and 1-(S)-camphorsulfonyl-6-methoxy-2-[(3,5-dimethyl-4-methoxy-2-pyridyl)methyl-(S)-sulfinyl]-1H-benzimidazole is hydrolyzed with barium hydroxide, isolated the resulting esomeprazole barium salt followed by neutralization with an acid to yield substantially enantiomerically pure esomeprazole in neutral form and then converted into its pharmaceutically acceptable salts.
本发明提供了一种改进的、商业上可行的方法,用于制备中性形式或其药学上可接受的盐或其溶剂包括水合物的基本对映体纯的埃索美拉唑。例如,将含有1-(S)-樟脑磺酰基-5-甲氧基-2-[(3,5-二甲基-4-甲氧基-2-吡啶基)甲基-(S)-亚磺酰基]-1H-苯并咪唑和1-(S)-樟脑磺酰基-6-甲氧基-2-[(3,5-二甲基-4-甲氧基-2-吡啶基)甲基-(S)-亚磺酰基]-1H-苯并咪唑的混合物水解,分离得到的埃索美拉唑钡盐,然后用酸中和,得到基本对映体纯的中性形式的埃索美拉唑,然后转化为其药学上可接受的盐。