US3956323A
Expired / Lapsed
US
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Furan, benzofuran and tetrahydrofuran carboxylic acid esters
Assignee: Hoffmann La Roche Inc
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Filing: 1974-08-02
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Granted: 1976-05-11
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Expires: 1994-08-02
Abstract
Abstract Compounds represented by the following formula S ANGLE CH3 A-COO-CH-CO-NH-CH-CHC ANGLE ¦¦¦¦CH3 TC-N--CH PARALLEL ¦ OCOOH wherein A is a substituted or unsubstituted heterocyclic radical and T is a C2 -C5 alkyl, alkenyl, cyclopropylmethyl, cyclobutylmethyl or cyclopentyl group A PROCESS FOR THEIR PREPARATION AND NOVEL INTERMEDIATES THEREFOR ARE DISCLOSED. These compounds are useful antibiotics.
Inventors
- 👤 Andre Furlenmeier
- 👤 Peter Quitt
- 👤 Karl Vogler
- 👤 Paul Lanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:47
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/89; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/24; C07D307/34; C07D307/56; C07D307/68; C07D307/77; C07D307/78; C07D307/82; C07D307/84
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A compound represented by the formula ##EQU8## wherein A is selected from the group consisting of furyl, tetrahydrofuryl and benzofuranyl and T is selected from the group consisting of C 2 - C 5 alkyl, C 2 - C 5 alkenyl, cyclopropylmethyl, cyclobutylmethyl and cyclopentyl.
Claim 2
Dependent Claim
45 words
A compound represented by the formula ##EQU8## wherein A is selected from the group consisting of furyl, tetrahydrofuryl and benzofuranyl and T is selected from the group consisting of C 2 - C 5 alkyl, C 2 - C 5 alkenyl, cyclopropylmethyl, cyclobutylmethyl and cyclopentyl.
Claim 3
Dependent Claim
20 words
Compounds in accordance with claim 1 wherein T is an alkyl or alkenyl group containing 4 or 5 carbon atoms.
Claim 4
Dependent Claim
12 words
Compounds in accordance with claim 1 wherein T is an isobutyl group.
Claim 5
Dependent Claim
13 words
A compound in accordance with claim 1 wherein A is a 2-furyl group.
Claim 6
Dependent Claim
11 words
Compounds in accordance with claim 1 which have the R configuration.
References Cited (Backward Citations)
US3257420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |