Process for the Preparation of d-threo-Ritalinic Acid Hydrochloride by Resolution of dl-threo-Ritalinic Acid Using Chiral Carboxylic Acid

Process for the Preparation of d-threo-Ritalinic Acid Hydrochloride by Resolution of dl-threo-Ritalinic Acid Using Chiral Carboxylic Acid

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PRAKASAM TANGIRALA, KUMAR BORKATTE NARASIMHA HITESH, PERUMAL SANGU, LOGANATHAN KOTHANDAPANI
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung: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.