19-nor-steroid esters
US5276023A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Apr 30, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J31/006
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound of the formula ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon of 1 to 8 carbon atoms, R.sub.2 and R.sub.3 are individually hydrogen or alkyl of 1 to 4 carbon atoms, G is a hydrocarbon of 1 to 18 carbon atoms optionally containing at least one heteroatom and linked to the steroid nucleus by a carbon atom, X is X.sub.A or X.sub.B, X.sub.A is selected from the group consisting of hydrogen, alkyl of 1 to 8 carbon atoms, aralkyl of 7 to 15 carbon atoms, acyl of an organic carboxylic acid of 1 to 8 carbon atoms and Y is -B-O--CO--A-Z, B is a saturated or unsaturated, linear or branched alkylene of 1 to 8 carbon atoms, A is a saturated or unsaturated, linear or branched alkylene of 1 to 6 carbon atoms and optionally interrupted or ended by a bivalent aromatic or is a bivalent aromatic and Z is --COOH or --SO.sub.3 H which may be salified with an alkali metal, alkaline earth metal, an organic amine or --NH.sub.4 or X.sub.B is --COAZ, A and Z are defined as above and Y is selected from the group consisting of --C.tbd.C--R.sub.4, --CH.dbd.CH--R.sub.4 and --CH.sub.2 --CH.sub.2 --R.sub.4, R.sub.4 is selected from the group consisting of hydrogen, halogen, alkyl of 1 to 6 carbo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.