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US 7,411,062 B2Granted
7α-biscarbonyl-substituted steroid compounds
AssigneePfizer Inc.
InventorsBruce Allen Pearlman, Amphlett Greg Padilla, Jeffrey L. Havens, Sonja S. Mackey, Haifeng Wu
Life of this patent
Estimating the term…
Abstract
The present invention involves intermediates, including a 7α-substituted steroid (II), and processes which are used to prepare eplerenone, a useful pharmaceutical agent.
Claims12
A compound having the structure:
- wherein Rb is selected from the group consisting of —H, C1-C4 alkyl, and phenyl optionally substituted with one or two C1-C4 alkyl or C1-C4 alkoxy.
A compound having the structure:
- wherein Rb is selected from the group consisting of —H, C1-C4 alkyl, and phenyl optionally substituted with one or two C1-C4 alkyl or C1-C4 alkoxy.
A compound having the structure:
- wherein Rb is selected from the group consisting of —H, C1-C4 alkyl, and phenyl optionally substituted with one or two C1-C4 alkyl or C1-C4 alkoxy.
Dependencies are inferred from the claim text.