US3796711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cephalosporin intermediates
Assignee: Merck and Co Inc
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Filing: 1972-11-13
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Granted: 1974-03-12
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Expires: 1992-11-13
Abstract
Abstract A PROCESS FOR THE PREPARATION OF THE COMPOUND: 2-(HOOC-),2-(H2N-COO-CH2-),7-(CH3-O-),7-((2-(HOOC-)TETRA HYDROPYRAN-6YL)=N-)-2-CEPHEM IS PROVIDED WHICH EMPLOYS DIAZOTIZATION OF 7-(5''-AMINO5'' - CARBOXYVALERAMIDO) - 3 - CARBAMOYLOXYMETHYL-7METHOXY DECEPHALOSPORANIC ACID IN THE ABSENCE OF AN EXTRANEOUS ACID. THE COMPOUND I CAN BE USED TO PREPARE USEFUL COMPOUNDS HAVING ANTI-BACTERIAL ACTIVITY.
Inventors
- 👤 T Utne
- 👤 R Jobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |