Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Marianne Langston0
Hooshang Shahriari Zavareh0
Date of Patent
January 16, 2007
0Patent Application Number
099281390
Date Filed
August 10, 2001
0Patent Primary Examiner
Patent abstract
The present invention pertains to a process for obtaining a single enantiomer, d or l, of threo-methylphenidate, comprising resolution of a mixture of the enantiomers; racemisation of the unwanted enantiomer, to give a mixture of all four stereoisomers; and separation of the erythro stereoisomers, to leave the same mixture of enantiomers for resolution.
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