Method For Obtaining A Pharmaceutically Active Compound, Synthesis Intermediates Thereof And Methods For Obtaining Them
申请人:Perez Andres Juan Antonio
公开号:US20080194824A1
公开(公告)日:2008-08-14
The present invention relates to a method for obtaining Dolasetron that comprises: a) Esterification of the alcohol of formula (IV) with indole-3-carboxylic acid (compound (III)) or a reactive derivative thereof, to give a compound of formula (V), followed by step b) which includes Dieckmann reaction of the intermediate (V), by reaction with a strong organic or inorganic base, to give the intermediate (VI), and step c) which comprises dealcoxycarbonylation of the intermediate (VI) to give Dolasetron base and, if desired, a pharmaceutically acceptable salt thereof, hydrates or solvates of the base of said salt. The invention also relates to the intermediates (V) and (VI), and methods for obtaining them. With the method of the present invention Dolasetron is obtained at industrial scale with good yields, with decreased use of reactants and solvents, while said method is also of greater atomic efficiency.
本发明涉及一种获取多拉塞托隆的方法,包括:a)将式(IV)的醇与吲哚-3-羧酸(化合物(III))或其反应性衍生物酯化,得到式(V)的化合物,然后进行步骤b),其中包括将中间体(V)通过与强有机或无机碱反应的迪克曼反应,得到中间体(VI),和步骤c),包括对中间体(VI)进行去醇羰基化,得到多拉塞托隆碱和所述盐的药用可接受性水合物或溶剂物。本发明还涉及中间体(V)和(VI)以及获取它们的方法。使用本发明的方法,可以以良好的产率在工业规模下获得多拉塞托隆,并减少反应物和溶剂的使用,同时该方法也具有更高的原子效率。