The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2011
Filed:
Aug. 18, 2008
Applicant:
Boaz Gome, Rishon-Lezion, IL;
Inventor:
Boaz Gome, Rishon-Lezion, IL;
Assignee:
Teva Pharmaceutical Industries Ltd., Petah Tiqva, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 233/05 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention encompasses processes for obtaining pure armodafinil substantially free of disulfide impurities that is suitable for use on an industrial scale. In particular, a processes for purifying armodafinil from bis(diphenylmethyl)disulfide comprising: dissolving crude armodafinil in ethanol to form a solution; adding a solvent selected from the group consisting of linear or branched C-Calkyl, linear or branched C-Cether, and mixtures thereof to the solution to form a reaction mixture; cooling the reaction mixture; and isolating pure armodafinil from the reaction mixture.