Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2006-11-07
2006-11-07
Kumar, Shailendra (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C514S618000
Reexamination Certificate
active
07132570
ABSTRACT:
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.
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Leproust Pierre
Neckebrock Olivier
Cephalon France
Kumar Shailendra
Woodcock & Washburn LLP
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