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US3207753A
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Ring a aromatic 9beta-estratrienes and -19-norpregnatrienes
Assignee: Roche Palo Alto LLC
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Filing: 1962-11-09
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Granted: 1965-09-21
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Bowers Albert
- 👤 Edwards John
- 👤 Crabbe Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:24
CPC Classifications
C; C07; C07J; C07J5/00; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
3 - METHOXY - 20 - ETHYLENEDIOXY-$1,3,5(10)-19-NOR-9BPREGNATRIEN-11A-OL.
Claim 2
Dependent Claim
77 words
A PROCESS FOR PRODUCING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 20-KETO-19-NOR-9B-$4-STEROIDS AND 20-KETO-19-NOR-9B,10A-$4-STEROIDS OF THE PREGNANE SERIES COMPRISING REACTING A 9A,11A-EPOXY-20-CYCLOETHYLENEDIOXY-$1,3,5(10)-PREGNATRIENE WITH LITHIUM ALUMINUM HYDRIDE, OXIDIZING THE THUS-FORMED 11A-HYDROXY-20-CYCLOETHYLENEDIOXY-$1,3,5(10)-PREGNATRIENE TO PRODUCE THE CORRESPONDING 11-KETO COMPOUND, REDUCING SAID 11-KETO COMPOUND UNDER WOLFF-KISHNER CONDITIONS, AND SUBJECTING THE THUSFORMED 11-DESOXY-9B-$1,3,5(10)-PREGNATRIENE TO BIRCH REDUCTION FOLLOWED BY ACID HYDROLYSIS, USING A MINERAL ACID, TO PRODUCE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 20-KETO-19-NOR-9B-$4-STEROIDS AND 20-KETO-19-NOR9B,10A-$4-STEROIDS OF THE PREGNANE SERIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |