US3261855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of delta5(10)-steroids
Assignee: Organon NV
•
Filing: 1964-04-17
•
Granted: 1966-07-19
•
Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Zeelen Filippus Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:31
CPC Classifications
C; C07; C07J; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD FOR THE PREPARATION OF $5(10)-STEROIDS NONSUBSTITUTED IN THE 3-POSITION, COMPRISING REACTING A $5.619-HYDROXY-STEROID OF THE ANDROSTANE SERIES NON-SUBSTITUTED IN THE 3-POSITION WITH AN OXIDATIVE METAL ACYLATE SELECTED FROM THE GROUP CONSISTING OF A LEAD TETRACYLATE, A SILVER ACYLATE AND MERCURY ACYLATE TO PRODUCE THE CORRESPONDING $5(10)-6-ACYLOXY-OESTRENE COMPOUND, HYDROLYZING SAID 6-ACYLOXY COMPOUND TO THE CORRESPONDING 6-HYDROXY COMPOUND, OXIDIZING THE 6-HYDROXY COMPOUND TO THE CORRESPONDING 6-KETO COMPOUND, AND SPLITTING OFF THE 6-KETO GROUP BY THIOKETALIZATION AND REDUCTION.
Claim 2
Independent Claim
77 words
A METHOD FOR THE PREPARATION OF $5(10)-STEROIDS NONSUBSTITUTED IN THE 3-POSITION, COMPRISING REACTING A $5.619-HYDROXY-STEROID OF THE ANDROSTANE SERIES NON-SUBSTITUTED IN THE 3-POSITION WITH AN OXIDATIVE METAL ACYLATE SELECTED FROM THE GROUP CONSISTING OF A LEAD TETRACYLATE, A SILVER ACYLATE AND MERCURY ACYLATE TO PRODUCE THE CORRESPONDING $5(10)-6-ACYLOXY-OESTRENE COMPOUND, HYDROLYZING SAID 6-ACYLOXY COMPOUND TO THE CORRESPONDING 6-HYDROXY COMPOUND, OXIDIZING THE 6-HYDROXY COMPOUND TO THE CORRESPONDING 6-KETO COMPOUND, AND SPLITTING OFF THE 6-KETO GROUP BY THIOKETALIZATION AND REDUCTION.
References Cited (Backward Citations)
US3178461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |