Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jen-Sen Dung0
Michael Lawrence Casner0
Jin Luo0
Erno M. Keskeny0
Date of Patent
December 26, 2006
Patent Application Number
11234627
Date Filed
September 23, 2005
Patent Citations Received
Patent Primary Examiner
Patent abstract
A process for preparing oxycodone or an oxycodone salt, wherein the oxycodone or oxycodone salt has low levels of impurities (especially 14-hydroxycodeinone) is disclosed. The process comprises the steps of:a) preparing a mixture comprising oxycodone and a solvent and adjusting the pH of the mixture to less than 6; and subsequentlyb) exposing the mixture to hydrogenation reagents for a period of at least 1 hour.
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