[EN] NOVEL PROCESS FOR PREPARING ALENDRONIC ACID<br/>[FR] NOUVEAU PROCEDE DE PREPARATION D'ACIDE ALENDRONIQUE
申请人:TEVA PHARMA
公开号:WO2000049026A1
公开(公告)日:2000-08-24
A novel process for the preparation of alendronic acid is disclosed. The method comprises the steps of reacting a compound of formula (I) with H3PO3 wherein R is an imido group and R1 is selected from the group consisting of chloro, bromo, iodo, fluoro, hydroxy, amino, -OR2 or -OC(O)R2, wherein R2 is C1-C12alkyl, C1-C12 cycloalkyl or C1-C12 aryl; and then reacting the product of the first step with a deprotecting agent. Alendronic acid is then recovered. The method is safe, efficient and suitable for use on a large scale.