US3905965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of total synthesis of cephalosporin derivatives and intermediates
Assignee: Sanofi Aventis France
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Filing: 1972-10-16
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Granted: 1975-09-16
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Expires: 1992-10-16
Abstract
Abstract WHEREIN X'' IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, LOWER ALKYL AND PHENYL LOWER ALKYL, R'' is selected from the group consisting of hydrogen, lower alkyl, phenyl, phenyl lower alkyl, lower alkyl phenyl, and Z'' is selected from the group consisting of amino and tritylamino. These compounds are useful as intermediates in the preparation of cephalosporin compounds. A 1,3-thiazine compound having the formula
Inventors
- 👤 Jacques Martel
- 👤 Rene Heymes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:02
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/38; C07D501/46; C07D513/00; C07D513/02; C07D513/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
6 words
A 1,3-THIAZINE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A 1,3-THIAZINE COMPOUND HAVING THE FORMULA
Claim 3
Dependent Claim
19 words
The product of claim 1 wherein R1 is hydrogen, Z'' is amino and X'' is t-butyl and its hydrochloride.
Claim 4
Dependent Claim
16 words
The product of claim 1 wherein R1 is hydrogen, Z'' is amino and X'' is hydrogen.
Claim 5
Dependent Claim
16 words
The product of claim 1 wherein R1 is hydrogen, Z'' is tritylamino and X'' is hydrogen.
References Cited (Backward Citations)
US3642788A
Cited
US3658802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |