851895-37-9Relevant articles and documents
IMPROVED PROCESS FOR THE PREPARATION OF D-THREO-RITALINIC ACID HYDROCHLORIDE BY RESOLUTION OF DL-THREO-RITALINIC ACID USING CHIRAL CARBOXYLIC ACID
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Page/Page column 8-10, (2010/11/18)
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 esterif?cation gives d-threo-methylphenidate, a very well known CNS stimulant.