Process and new intermediates for the preparation of steroids with a progestogen activity
US7667056B2 · kind B2 · utility
0Cited by
5References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2003 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J21/008
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a new process of synthesis and to some new intermediates for the preparation of steroids with progestogen activity, more particularly, for the preparation of Desogestrel of formula (I). Said process is characterized by the regioselective reduction of the compound of formula (II) to give the intermediate of formula (III).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.