17-[(Hydroxymethyl)formamido-methylene]-steroids
US4464302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1980 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jul 28, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J41/0072
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel 17-[(hydroxymethyl)formamido methylene]-steroids of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms optionally substituted with halogen or an oxygen or nitrogen function and alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms and the A,B,C and D rings may contain one or more double bonds and are optionally substituted with at least one member of the group consisting of hydroxy, keto, halogen, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms and a process for their preparation which are intermediates for the preparation of the corresponding 17-hydroxyacetyl steroids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.