The present invention relates to the method for preparing pyrazolopyrimidinone derivatives and their pharmaceutically acceptable salts having efficacy on the treatment of impotence, one of male sexual dysfunctions. The method according to the present invention comprises the steps of chlorosufonation the pyrazolamide, followed by amination with amine and intramolecular cyclization. The method provides the pyrazolopyrimidinone derivatives and their pharmaceutically acceptable salts with high yield and in an economic manner.
本发明涉及一种制备
吡唑吡咯啉酮衍
生物及其药学上可接受的盐的方法,该衍
生物可用于治疗男性性功能障碍之一的阳痿。根据本发明的方法包括对
吡唑酰胺进行
氯磺化,然后用胺进行
氨基化和分子内环化。该方法以高产率和经济的方式提供了
吡唑吡咯啉酮衍
生物及其药学上可接受的盐。