Novel 11.beta.-substituted-19-nor-steroids
US4978657A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1985 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Dec 17, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J71/0063
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel 19-nor-steroids of the formula ##STR1## wherein R.sub.1 is an organic group of 1 to 18 carbon atoms optionally containing at leat one heteroatom with the atom immediately adjacent the 11-carbon atom being carbon, R.sub.2 is a hydrocarbon of 1 to 8 carbon atoms, X is the remainder of a pentagonal or hexagonal ring optionally substituted and optionally containing one unsaturated bond, the A and B rings are selected from the group consisting of ##STR2## R' and R" are individually selected from the group consisting of hydrogen, --CN and alkyl of 1 to 4 carbon atoms, R.sub.x is selected from the group consisting of hydrogen and OR.sub.e, R.sub.e is selected from the group consisting of hydrogen, optionally substituted alkyl of 1 to 6 carbon atoms and acyl, R.sub.a may be in the E or Z positions as indicated by the wavy line and is selected from the group consisting of ##STR3## and acyloxy, R.sub.a ' and R.sub.a " are alkyl of 1 to 4 carbon atoms or taken together with the nitrogen atom form a heterocycle of 5 to 6 chain members optionally containing another heteroatom with the proviso that when A and B are ##STR4## wherein R' and R" are both hydrogen, R.sub.1 contain at least one …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.