申请人:Zhejiang Huahai Pharmaceutical Co., Ltd.
公开号:US20190040052A1
公开(公告)日:2019-02-07
The present invention relates to a synthesis process of suvorexant, novel compounds represented by formulas II, III, IV or V, or salts thereof for preparing suvorexant, and a method for preparing the intermediates. The preparation method uses a chiral starting material to synthesize chiral compounds represented by formulas II, III, IV or V, the compounds obtained being used for synthesizing the suvorexant. The preparation method has the advantages of simple operation, low cost, mild reaction conditions, simple post-treatment, easy to purify, high yield, high ee value for the product, and easy to industrialize. In the reaction route shown, R represents benzyl, allyl or 1-phenethyl, or optionally substituted benzyl at the 2 position to 6 position, such as 4-methoxybenzyl, 4-nitrobenzyl, 2-methylbenzyl, 4-chlorobenzyl or 3-fluorobenzyl.
本发明涉及一种制备苏文昔坦的合成工艺,用于制备苏文昔坦的II、III、IV或V式所代表的新化合物或其盐,以及制备中间体的方法。该制备方法使用手性起始物质合成II、III、IV或V式所代表的手性化合物,所得化合物用于合成苏文昔坦。该制备方法具有操作简单、成本低、反应条件温和、后处理简单、易于纯化、产率高、产品的ee值高,并且易于工业化的优点。在所示的反应路线中,R代表苄基、烯丙基或1-苯乙基,或者在2位到6位可选择地取代的苄基,如4-甲氧基苄基、4-硝基苄基、2-甲基苄基、4-氯苄基或3-氟苄基。