4,5-Seco-estrane-3,5,17-trione derivatives
US4207240A · kind A · utility
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8Claims
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Key dates
| Filing date | Feb 26, 1979 |
| Grant date | Jun 10, 1980 |
| Priority date | — |
| Expiry date | Feb 26, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel 4,5-seco-estrane-3,5,17-trione derivatives of the formula ##STR1## wherein R.sub.1 is alkyl of 1 to 3 carbon atoms, R.sub.2 is selected from the group consisting of hydrogen and alkyl of 1 to 5 carbon atoms and K and K' are individually blocked ketones in the form of ketals which are intermediates for the preparation of therapeutically active steroids and their preparation and novel intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.