This invention relates to an improved process for the preparation of substantially pure, stable anhydrous gabapentin. Thus, cyclohexane 1,1-diacetic acid monoamide is first treated with NaOH/NaClO to form 3,3-pentamethylenebutyrolactam, which is treated with aqueous HCl solution under reflux to provide gabapentin HCl salt, which is then neutralized with NaOH followed by a dehydration step to provide substantially pure, storage-stable, pharmaceutical grade gabapentin.
这项发明涉及一种改进的工艺,用于制备基本纯净、稳定的无
水加巴喷丁。因此,首先将
环己烷-1,1-二乙酰胺与NaOH/NaClO处理,形成3,3-戊亚丁内酯,然后在回流条件下用
水合HCl溶液处理,得到
加巴喷丁盐酸盐,然后用NaOH中和,随后进行脱
水步骤,得到基本纯净、贮存稳定、药用级别的
加巴喷丁。