Back to results
US 4,231,946 AGranted
14,15-Methylene derivatives of the estrane series and methods for preparing same
AssigneeVEB Jenapharm
InventorsKurt Ponsold, Richard Prousa, Michael Oettel, Joachim Strecke, Herbert Hoffmann
Life of this patent
Estimating the term…
Abstract
Compounds of the general formula ##STR1## in which R' is hydrogen or a methyl radical; R is a hydroxyl, acetoxy, arylaminocarbonyloxy, alkylaminocarbonyloxy radical; Z is hydrogen or a lower alkyl, or R and Z together are oxygen. These compounds exhibit a very favorable separation of desirable contraceptive and undesirable uterine and antigonadotrophic properties.
Claims12
A compound of the formula ##STR5## where R' is H or methyl;
- R is a hydroxy, acetoxy, arylaminocarbonyloxy or alkylaminocarbonyloxy radical and
- Z is H or a lower alkyl, or
- R and Z together are oxygen.
Dependencies are inferred from the claim text.