New Compounds Useful for the Synthesis of S- and R-Omeprazole and a Process for Their Preparation
申请人:von Unge Sverker
公开号:US20090253911A1
公开(公告)日:2009-10-08
The present invention relates to an improved method for the synthesis of the (S)- or (R)-enantiomer of omeprazole, characterized in that 2-[[(4-X-3,5-dimethylpyridin-2-yl)methyl]thio]-5-methoxy-1H-benzimidazole or 2-[[(4-X-3,5-dimethyl-1-oxidopyridin-2-yl)methyl]thio]-5-methoxy-1H-benzimidazole, wherein X is a leaving group, is oxidized into the corresponding sulphoxide which is obtained as a crystalline compound. Recrystallisation of the thus obtained sulphoxide results in a compound of enhanced chemical and optical purity, which is subsequently transformed into the (S)- or (R)-enantiomer of omeprazole.
本发明涉及一种改进的奥美拉唑(omeprazole)(S)或(R)对映体合成方法,其特征在于将2-[[(4-X-3,5-二甲基吡啶-2-基)甲基]硫基]-5-甲氧基-1H-苯并咪唑或2-[[(4-X-3,5-二甲基-1-氧代吡啶-2-基)甲基]硫基]-5-甲氧基-1H-苯并咪唑,其中X是一个离去基团,氧化为相应的磺酸氧化物,该磺酸氧化物以晶体化合物的形式获得。因此获得的磺酸氧化物再结晶,可得到化学和光学纯度更高的化合物,随后转化为奥美拉唑(S)或(R)对映体。