Patent US3875154A successfully refreshed from Google Patents.
US3875154A
Expired / Lapsed
US
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Certain 5-thia-1-azabicyclo{8 4.2.0{9 octenes
Assignee: University of California
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Filing: 1973-12-17
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Granted: 1975-04-01
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Expires: 1993-12-17
Abstract
Abstract A process for preparing lactams, particularly 1azabicyclo(4.2.0)octanes, 1-azabicyclo(3.2.0)heptanes, 4-thia-1azabicyclo(3.2.0)heptanes and 5-thia-1-azabicyclo (4.2.0)octenes, which comprises subjecting a cyclic Alpha -ketoamide to an oxidizing agent to form a carboxyl substituted lactam structure. The oxidant is preferably periodate, in an aqueous solution, at pH 5-9 and room temperature. The novel products obtained from the process are useful intermediates in the preparation of antimicrobial agents. The cyclic Alpha -ketoamide starting materials are also novel.
Inventors
- 👤 Henry Rapoport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:29
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
11 words
A compound according to claim 1 in which R is hydrogen.
References Cited (Backward Citations)
US3534029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |