Synthesis of noroxymorphone
US10927122B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Nov 29, 2018 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Nov 29, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P25/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the improved synthesis of noroxymorphone of formula (III). Particularly, the invention shows a way how to reduce the impurity level in the product avoiding lengthy purification steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.