申请人:Boehringer Mannheim Italia
公开号:US05245039A1
公开(公告)日:1993-09-14
A process for the optical resolution of racemic 1,4-dihydropyridines, containing isothioureido groups. Salification of racemic isothioureas with optically active acids produces diasteroisomeric mixtures of isothiouronium salts, that, using conventional techniques, are separated in the individual components to give optically pure isothioureides of 1,4-dihydropyridines and salts thereof with conventional acids. Said optically pure 1,4-dihydropyridines can then be subjected to desulphuration and to different transformations to give to other enantiomerically pure and therapeutically useful 1,4-dihydropyridines.
一种用于光学分辨含有异硫脲基团的混合1,4-二氢吡啶的方法。将混合的异硫脲与光学活性酸盐化会产生异硫脲盐的对映异构体混合物,通过传统技术将其分离成单独的组分,得到光学纯的1,4-二氢吡啶的异硫脲和与传统酸盐的盐。然后,这些光学纯的1,4-二氢吡啶可以经过脱硫和不同的转化反应,得到其他对映纯和在治疗上有用的1,4-二氢吡啶。