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AssigneesCephalon France, Organisation De Synthese Mondiale Orsymonde
InventorsOlivier Neckebrock, Laurent Courvoisier, Stephanie Graf, Gilles Serrure, Gerard Coquerel, Sebastien Rose, Christine Besselievre, Franck Mallet, Adriaan Van Langevelde
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The invention relates to a process for the preparation of crystalline forms of the optical enantiomers of modafinil, comprising stages comprising: i) dissolving one of the optical enantiomers of modafinil in a solvent other than ethanol, ii) crystallising the modafinil enantiomer, iii) recovering the crystalline form of the modafinil enantiomer so obtained. The invention also relates to a process for the preparation of the optical enantiomers of modafinil.
Process for preparation of crystalline forms of the optical enantiomers of modafinil, comprising the following stages:
12-30. (canceled)
Process for the preparation of optically active modafinil from modafinil acid, comprising the following stages:
56-63. (canceled)
Polymorphic form of the laevorotatory enantiomer of modafinil, characterized in that it produces an X-ray diffraction pattern comprising intensity peaks at the interplanar spacings:
A composition comprising a laevorotatory enantiomer of modafinil that produces an X-ray diffraction pattern comprising intensity peaks at the interplanar spacings:
Dependencies are inferred from the claim text.