Optical resolution of methylphenidate by 0,0'-bisaroyl...

Details Optical resolution of methylphenidate by 0,0'-bisaroyl... Optical resolution of methylphenidate by 0,0'-bisaroyl...

C - Chemistry, Metallurgy

07

D

C07D 211/34 (2006.01) A61K 31/445 (2006.01)

Patent

CA 2242595

Single isomer methylphenidate, selected from the d- and l-threo-enantiomers, has been obtained in purified form, to the extent of less than 2 % by weight of a contaminant selected from resolving agent and ritalinic acid. This is achieved by resolution of a mixture of enantiomers using an 0,0'- diaroyltartaric acid as resolving agent.

Méthylphénidate à un seul isomère, choisi parmi les d- et l-threo-énantiomères, obtenu sous forme purifiée, contenant moins de 2 % en poids d'un contaminant choisi parmi un agent résolvant et de l'acide ritalinique. On obtient ladite substance par résolution d'un mélange d'énantiomères à l'aide d'un acide 0,0'-diaroyltartarique en tant qu'agent résolvant.

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