申请人:Stirling Products Limited
公开号:EP1832572A1
公开(公告)日:2007-09-12
The present invention relates to a process for the enantiomeric enrichment of salbutamol and salbutamol precursors and the acid-addition salts thereof:
where R is hydrogen or benzyl, R' is hydrogen or benzyl and X is CH2OH or COO-C1-C4-alkyl
the process comprising the crystallization of a compound of the formula I in the form of its acid-addition salt with an achiral carboxylic acid A that has at least three carbon atoms and a solubility of less than 50 g/l in water at pH < 3, 20°C and 1013 mbar, from a solution containing a mixture of the enantiomers of the compound of formula I and the achiral carboxylic acid A in the presence of seed crystals of the desired enantiomer of the compound of formula I or the acid addition salt thereof, whereby the enantiomerically enriched acid-addition salt of the compound of formula I is obtained.
本发明涉及一种用于对沙丁胺醇及其前体和其酸加成盐进行对映体富集的方法:其中R为氢或苄基,R'为氢或苄基,X为CH2OH或COO-C1-C4-烷基,该方法包括以至少具有三个碳原子且在pH < 3、20°C和1013毫巴下水中溶解度小于50克/升的无手性羧酸A形式的化合物I的酸加成盐的结晶,从包含化合物I的对映体和无手性羧酸A的混合物的溶液中,在所需的化合物I的对映体或其酸加成盐的种晶的存在下结晶,从而获得对映体富集的化合物I的酸加成盐。