US3674784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-formyl cephalosporin sulfoxides
Assignee: Eli Lilly and Co
•
Filing: 1970-07-27
•
Granted: 1972-07-04
•
Expires: 1990-07-27
Abstract
Abstract 3-Formyl cephalosporin sulfoxide esters which are useful as intermediates in the preparation of new cephalosporin antibiotics.
Inventors
- 👤 J Alan Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:44
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
37 words
A compound as defined in claim 1 wherein R is an acyl radical in which m is 0, X is oxygen, R2 and R3 are each hydrogen, and R4 is phenyl, and R1 is C4 to C6-tert-alkyl.
Claim 2
Dependent Claim
15 words
A compound as defined in claim 2 wherein the compound is tert-butyl 3-formyl-7-phenoxyacetamido- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 3
Dependent Claim
31 words
A compound as defined in claim 1 wherein R is an acyl group in which m is 0, R2 and R3 are each hydrogen, R4 is phenyl, and R1 is methoxybenzyl.
Claim 4
Dependent Claim
15 words
A compound as defined in claim 4 wherein the compound is p-methoxybenzyl 3-formyl-7-phenoxyacetamido- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 5
Dependent Claim
15 words
A compound as defined in claim 1 wherein the compound is benzhydryl 3-formyl-7-(2''-thienylacetamido)- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 6
Dependent Claim
18 words
A compound as defined in claim 1 where the compound is a C4 to C6-tert-alkyl 3-formyl-7-(2''-thienylacetamido)- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 7
Dependent Claim
19 words
A compound as defined in claim 1 wherein the compound is benzhydryl 3-formyl-7-(D- Alpha -phenyl- Alpha -(N-tert-butoxy-carbonylamido)acetamido)- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 8
Dependent Claim
22 words
A compound as defined in claim 1 wherein the compound is a C4 to C6-tert-alkyl 3-formyl-7-(D- Alpha -phenyl- Alpha -(N-tert-butoxycarbonylamino)acetamido)- Delta 3-cephem-4-carboxylate-1-oxide.
Claim 9
Dependent Claim
19 words
A compound as defined in claim 1 in which R is a C1 to C6-alkanoyl, and R1 is benzhydryl.
Claim 10
Dependent Claim
16 words
A compound as defined in claim 10 in which the compound is benzhydryl 7-acetamido-3-formyl- Delta 3-4-carboxylate-1-oxide.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |