Method of preparing oxymorphone

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United States of America Patent

PATENT NO 9657029
APP PUB NO 20150133484A1
SERIAL NO

14406259

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Abstract

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The invention relates to an improved method of preparing oxymorphone or a salt thereof from oripavine. In particular, the invention relates to a method of preparing oxymorphone with a content of alpha-beta-unsaturated ketones (ABUK)<10 ppm, wherein the content of 8,14-dihydroxydihydromorphinone in the prepared oxymorphone is >10 ppm.

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Patent Owner(s)

  • SIEGFRIED AG;SIEGFRIED GENERICS INTERNATIONAL AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sun, Jianguang Hamilton, US 4 10

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