US3994889A
Expired / Lapsed
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3-Heterothio derivatives of (α-thiocarbonylaminol)-7α-methoxy-cephalosporins
Assignee: ER Squibb and Sons LLC
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Filing: 1975-05-28
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Granted: 1976-11-30
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Expires: 1995-05-28
Abstract
Abstract 3-Heterothio(α-thiocarbonylamino)-7α-methoxycephalosporin derivatives of the general formula ##SPC1## Wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, trihaloethyl, a salt forming ion or the group ##EQU1## R 1 is hydrogen, lower alkyl, cyclo-lower alkyl, unsaturated cyclo-lower alkyl, phenyl, substituted phenyl or thienyl; R 2 and R 5 each is hydrogen or lower alkyl; R 3 is a five or six membered nitrogen, sulfur and/or oxygen containing ring system, and R 4 is lower alkyl, phenyl or phenyl-lower alkyl; are useful as antibacterial agents.
Inventors
- 👤 Hermann Breuer
- 👤 Uwe D. Treuner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:11
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
A compound of the formula ##EQU2## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, trihaloethyl, ##EQU3## alkali metal, alkaline earth metal or (lower alkyl)amine; R 1 is thienyl or phenyl; R 2 and R 5 each is hydrogen or lower alkyl; R 3 is R 6 -thiadiazole, R 6 -oxadiazole, R 6 -triazole, thiatriazole or R 6 -tetrazole; R 4 is lower alkyl, phenyl or phenyl-lower alkyl; and R 6 is hydrogen or lower alkyl.
Claim 2
Dependent Claim
77 words
A compound of the formula ##EQU2## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, trihaloethyl, ##EQU3## alkali metal, alkaline earth metal or (lower alkyl)amine; R 1 is thienyl or phenyl; R 2 and R 5 each is hydrogen or lower alkyl; R 3 is R 6 -thiadiazole, R 6 -oxadiazole, R 6 -triazole, thiatriazole or R 6 -tetrazole; R 4 is lower alkyl, phenyl or phenyl-lower alkyl; and R 6 is hydrogen or lower alkyl.
Claim 3
Dependent Claim
11 words
A compound as in claim 1 wherein R 1 is phenyl.
Claim 4
Dependent Claim
11 words
A compound as in claim 1 wherein R 1 is thienyl.
Claim 5
Dependent Claim
12 words
A compound as in claim 1 wherein R 2 is lower alkyl.
Claim 6
Dependent Claim
11 words
A compound as in claim 1 wherein R 2 is hydrogen.
Claim 7
Dependent Claim
11 words
A compound as in claim 1 wherein R 3 is 1-methyltetrazole.
Claim 8
Dependent Claim
11 words
A compound as in claim 1 wherein R 3 is methylthiadiazole.
Claim 9
Dependent Claim
41 words
A compound of the formula ##STR14## wherein R is hydrogen, alkali metal, diphenylmethyl or ##STR15## R 1 is phenyl or thienyl; R 2 is hydrogen or methyl; R 3 is (lower alkyl)tetrazole or (lower alkyl)thiadiazole; R 4 is methyl or t-butyl.
Claim 10
Dependent Claim
41 words
A compound of the formula ##STR14## wherein R is hydrogen, alkali metal, diphenylmethyl or ##STR15## R 1 is phenyl or thienyl; R 2 is hydrogen or methyl; R 3 is (lower alkyl)tetrazole or (lower alkyl)thiadiazole; R 4 is methyl or t-butyl.
Claim 11
Dependent Claim
23 words
A compound as in claim 1 wherein R and R 2 each is hydrogen, R 1 is phenyl and R 3 is (1-methyl-1H-tetrazol-5-yl).
Claim 12
Dependent Claim
23 words
A compound as in claim 1 wherein R and R 2 each is hydrogen; R 1 is 2-thienyl; and R 3 is 1-methyl-1H-tetrazol-5-yl.
Claim 13
Dependent Claim
23 words
A compound as in claim 1 wherein R and R 2 each is hydrogen, R 1 is 3-thienyl and R 3 is 1-methyl-1H-tetrazol-5-yl.
Claim 14
Dependent Claim
23 words
A compound as in claim 1 wherein R and R 2 each is hydrogen, R 1 is phenyl and R 3 is 5-methyl-1,3,4-thiadiazol-2-yl.
Claim 15
Dependent Claim
23 words
A compound as in claim 1 wherein R is hydrogen, R 1 is 2-thienyl, R 2 is methyl and R 3 is 3-methyl-1,2,4-thiadiazol-5-yl.
Claim 16
Dependent Claim
24 words
A compound as in claim 1 wherein R is alkali metal; R 1 is phenyl, R 2 is hydrogen and R 3 is 1-methyl-1H-tetrazol-5-yl.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |