US4008246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminothiazole derivatives
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1975-08-08
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Granted: 1977-02-15
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Expires: 1995-08-08
Abstract
Abstract A compound of the formula: ##STR1## wherein R 1 stands for a halogenoethoxycarbonylamino and R 2 stands for hydrogen or a halogen, is an important intermediate for producing a cephalosporin derivative of the formula: ##STR2## wherein R 3 stands for methyl, acetoxymethyl, carbamoyloxymethyl, an alkoxymethyl, an alkylthiomethyl, 2-carboxy-1-ethenyl, or a heterocyclic thiomethyl, R 5 stands for hydrogen or methoxy and R 2 has the same meaning as defined before, which is active against various pathogenic microorganisms even at a low concentration.
Inventors
- 👤 Michihiko Ochiai
- 👤 Akira Morimoto
- 👤 Yoshihiro Matsushita
- 👤 Taiiti Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/38; C07D277/44; C07D277/46; C07D277/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
A compound of the formula ##STR11## wherein X is chlorine or bromine, n is 1, 2 or 3, and R 2 is hydrogen, chlorine or bromine.
Claim 2
Dependent Claim
26 words
A compound of the formula ##STR11## wherein X is chlorine or bromine, n is 1, 2 or 3, and R 2 is hydrogen, chlorine or bromine.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 wherein R 2 is hydrogen.
Claim 4
Dependent Claim
13 words
A compound according to claim 1 wherein R 2 is chlorine or bromine.
Claim 5
Dependent Claim
14 words
A compound according to claim 1 wherein X is chlorine and n is 3.
Claim 6
Dependent Claim
11 words
A compound according to claim 1, said compound being, 2-(β,β,β-trichloroethoxycarbonylamino)thizol-4-ylacetic acid.
Claim 7
Dependent Claim
11 words
A compound according to claim 1, said compound being, 2-(β,β,β-trichloroethoxycarbonylamino)-5-chlorothiazol-4-ylacetic acid.
References Cited (Backward Citations)
US2829084A
Cited
US3705153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |