Intermediates in the preparation of steriod 5-alpha-reductase inhibitors
October 10, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2846445 2846446 2897202 3644425 N-substituted-17ଲ-carbamoylandrost-4-en-3-one 5 reductase inhibitors Novel steroid 5-reductase inhibitors D-Homosteroids 4-Aza-17ଲ-substituted-5-androstan-3-one-reductase inhibitors Steroidic 5-reductase inhibitors 17ଲ-N-monosubstituted carbamoyl-4-aza-5-androst-1-en-3-ones which are active as testosterone 5-reductase inhibitors Patent #: 4760071 InventorsAssigneeApplicationNo. 419563 filed on 10/10/1989US Classes:548/250, Tetrazoles (including hydrogenated)514/284, Tetracyclo ring system having the six-membered hetero ring as one of the cyclos549/331, The spiro includes a hetero ring558/429, The ring system contains at least three cyclos560/117Tricyclo ring system in acid moietyExaminersPrimary: Shah, Mukund J.Assistant: Ward, E. C. Attorney, Agent or FirmInternational ClassesC07D 307/94C07D 257/04 C07C 069/608 AbstractInvented are 4-aza-5-alpha-8(14)-17 substituted-androsten-3-ones having an 8(14), 7(8), or 16(17) double bond, optionally also having a 1(2) double bond, pharmaceutical compositions containing the compounds, and methods of using these compounds to inhibit steroid 5-alpha-reductase.Other References
Field of SearchThe spiro includes a hetero ringTetrazoles (including hydrogenated) Polycyclo carbocyclic ring system having at least three cyclos 1,3-oxazoles (including hydrogenated) The polycyclo ring system is tricyclo-carbocyclic The six-membered hetero ring shares ring members with one other cyclo only Oxygen attched directly or indirectly to morpholine ring by nonionic bonding Polycyclo-carbocyclic ring system having at least three cyclos The ring system contains at least three cyclos Tricyclo ring system in acid moiety |
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