The invention disclosed in this application relates to an improved process for the manufacture of d-threo-ritalinic acid hydrochloride and l-threo-ritalinic acid hydrochloride in an optically pure form by the resolution of dl-threo-ritalinic acid using a chiral carboxylic acid The d-threo-ritalinic acid hydrochloride prepared by the process of the present invention on esterification gives d-threo-methylphenidate, a very well known CNS stimulant.
本申请公开的发明涉及通过使用手性
羧酸对dl-巯基
苯乙酸进行分离,从而以光学纯形式制造d-巯基利他能酸盐酸盐和l-巯基利他能酸盐酸盐的改进工艺。本发明的工艺制备的d-巯基利他能酸盐酸盐在酯化反应中可得到d-巯基利他定,一种非常著名的中枢神经系统兴奋剂。