Process for the preparation of norelgestromin
US7393964B2 · kind B2 · utility
1Cited by
0References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2006 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Dec 20, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P15/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of Norelgestromin or 17α-hydroxy-13β-ethyl-18,19-dinorpregn-4-ene-20-yn-3-one oxime, also in crystalline form, in particular with an E/Z isomer ratio of between 1.3 and 1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.