Process for the preparation of d-threo-(r,r)-methylphenidate...

Details Process for the preparation of d-threo-(r,r)-methylphenidate... Process for the preparation of d-threo-(r,r)-methylphenidate...

C - Chemistry, Metallurgy

07

D

C07D 211/34 (2006.01)

Patent

CA 2243534

A process for obtaining a single enantiomer, d or l, of threo-methylphenidate, comprises 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 said mixture of enantiomers for resolution.

Procédé permettant d'obtenir un énantiomère unique, d ou l, de threo-méthylphénidate et consistant à effectuer la résolution d'un mélange des énantiomères, la racémisation de l'énantiomère indésirable, afin d'obtenir un mélange des quatre stéroéisomères, ainsi que la séparation des erythro-stéréoisomères, de manière à laisser ledit mélange d'énantiomères dans le but d'effectuer la résolution.

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