申请人:Zhejiang Hisun Pharmaceutical Co., Ltd.
公开号:US20180030049A1
公开(公告)日:2018-02-01
Disclosed is a preparation method for praziquantel and intermediates thereof. The method includes: obtaining a target product praziquantel by using β-phenethylamine as an initial raw material through a condensation reaction with chloroacetyl chloride, a substitution reaction with ethanolamine, and an acylation reaction with cyclohexanecarbonyl chloride, followed by an oxidation reaction and cyclization reaction. Also disclosed are two key intermediates, namely, a compound of formula IV and a compound of formula V for preparing praziquantel. The preparation method is reasonable and simple in its technological design, uses moderate reaction conditions, and is economical and environmentally friendly. Additionally, the raw materials are inexpensive and easy to obtain, the key intermediates are easy to prepare, and the total reaction yield and purity of the obtained target compound praziquantel is high, so that industrialized mass production is easy to achieve.
揭示了一种吡喹酮及其中间体的制备方法。该方法包括:通过将β-苯乙胺与氯乙酰氯进行缩合反应,与乙醇胺进行取代反应,以及与环己基甲酰氯进行酰化反应,得到目标产品吡喹酮,随后进行氧化反应和环化反应。还揭示了两个关键中间体,即式IV的化合物和式V的化合物,用于制备吡喹酮。该制备方法在技术设计上合理简单,使用适中的反应条件,经济环保。此外,原料价格低廉且易获得,关键中间体易于制备,获得的目标化合物吡喹酮的总反应产率和纯度高,便于实现工业化大规模生产。