A process for preparing an enantiomerically-enriched form of threo-ritalinic acid, which comprises resolving a mixture of enantiomers of a salt of the acid, said salt being formed with an achiral acid or base, using a chiral resolving agent. The resolved salt can be esterified, to give the therapeutic agent d-threo-methylphenidate.
一种制备内消旋threo-
利他林酸对映体富集形式的方法,包括使用手性分离剂分离一个与非手性酸或碱形成的盐的对映异构体混合物。分离出的盐可以酯化,以得到治疗剂d-threo-甲基苯
丙胺。