Pregnane derivatives
US4193921A · kind A · utility
6Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1977 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Oct 12, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07J71/001
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to pregnane derivatives of the formula ##STR1## wherein R.sup.1 and R.sup.3 are hydroxyl groups or readily cleavable etherified or esterified hydroxyl groups and R.sup.20 is hydroxymethyl or readily cleavable etherified or esterified hydroxy methyl, formyl, carboxyl or carbalkoxy useful as intermediates for the preparation of 1.alpha.-hydroxycholecalciferols. The present invention also relates to processes for the preparation of the pregnane derivatives and the intermediates thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.