A process for the preparation of losartan derivatives by chlorination and reduction of the respective 1H-imidazole-5-carbaldehydes
申请人:KRKA, D.D., Novo Mesto
公开号:EP1741711A1
公开(公告)日:2007-01-10
The invention provides a process for the preparation of a sartan derivative of formula (I):
wherein R = C2-C7 straight or branched alkyl or C3-C9 cycloalkyl, or a pharmaceutically acceptable salt thereof, comprising the steps of chlorinating and reducing, in any order, a compound of formula (III):
wherein R is defined as above to form a compound of formula (VI),
wherein R is defined as above and then deprotecting said compound of formula (VI) to obtain the sartan derivative of formula (I), and optionally converting said sartan derivative into one of its pharmaceutically acceptable salts. A preferred embodiment of this invention is a process for the preparation of losartan and, particularly, its potassium salt.
本发明提供了一种制备公式(I)的萨替洛尔衍生物的过程:其中R = C2-C7直链或支链烷基或C3-C9环烷基,或其药学上可接受的盐,包括以下步骤:在任意顺序下进行氯化和还原,以形成公式(VI)的化合物,其中R如上所述,然后去保护该公式(VI)的化合物以获得公式(I)的萨替洛尔衍生物,并可选择将该萨替洛尔衍生物转化为其药学上可接受的盐之一。本发明的一种优选实施方案是制备洛卡新和特别是其钾盐的过程。