申请人:Zhejiang Huahai Pharmaceutical Co., Ltd.
公开号:US10618891B2
公开(公告)日:2020-04-14
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.
本发明涉及一种合成suvorexant的工艺,由式II、III、IV或V代表的新型化合物或其盐,用于制备suvorexant,以及制备中间体的方法。该制备方法使用手性起始材料合成以式 II、III、IV 或 V 为代表的手性化合物,得到的化合物用于合成 suvorexant。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、产物ee值高、易于工业化等优点。在所示的反应路线中,R 代表苄基、烯丙基或 1-苯基乙基,或在 2 位至 6 位任选取代的苄基,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。