Steroidal 17.alpha.-silyl ethers and process to corticoids and progesterones
US4977255A · kind A · utility
16Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J51/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
17.beta.-Cyano-17.alpha.-hydroxy steroids (I) are transformed to 17.alpha.-halo silyl ethers (II) which are intermediates useful in the production of progesterones (V), 17-hydroxyprogesterones (VI), corticoids (VII) and 21-halo corticoids (III) which can readily be transformed to corticoids (VII).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.