.DELTA..sup.4,9(11),17(20) -pregnatriene-3-ones
US5187273A · kind A · utility
1Cited by
3References
3Claims
0Family size
Assignee
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Key dates
| Filing date | May 18, 1992 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | May 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound of the formula ##STR1## wherein Hal is chlorine or bromine, R is selected from the group consisting of alkyl of 1 to 6 carbon atoms, aralkyl of 7 to 15 carbon atoms and a silylated group, K is a protective group selected from the group consisting of ##STR2## n is 2 or 3 and the wavy lines mean the groups may have either isomer form or are mixtures thereof which are intermediates for .DELTA..sup.4,9(11),16 -pregnatriene-3-ones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.