A process for preparation of protriptyline hydrochloride from 5-dihydrobenzocycloheptatriene of formula (1) by coupling with chloropropyl alcohol in the presence of excess n-butyl Lithium in tetrahydrofuran under inert atmosphere, followed by preparation of mesylate derivative of formula (3) and finally the nucleophilic displacement of the mesylate group by reacting methylamine solution in methanol to give protriptyline free base of the formula (4). Also the present process reveals the hydrochloride salt formation and purification of the same to give pure pharmaceutical grade protriptyline hydrochloride with impurities less than 0.1% w/w.
从式(1)的5-二氢苯并
环庚三烯与
氯丙醇在
四氢呋喃中过量
正丁基锂存在下偶联的制备普曲林盐酸盐的方法,随后制备式(3)的
甲磺酸酯衍
生物,最后通过在
甲醇中与
甲胺溶液反应,进行
甲磺酸酯基的亲核置换,得到式(4)的普曲林游离碱。此外,该方法还揭示了盐酸盐的形成和纯化过程,以获得纯度高于0.1%(重量百分比)的纯制药级普曲林盐酸盐。