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Patent US4283527A successfully refreshed from Google Patents.
US4283527A
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Erythromycylamine 11,12-carbonate and derivatives thereof
Assignee: Pfizer Inc
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Filing: 1980-04-01
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Granted: 1981-08-11
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Expires: 2000-04-01
Abstract
Abstract Erythromycylamine 11,12-carbonate, its 2'-acetyl-, 2'-propionyl- and 2'-(3-carbethoxypropionyl)-derivatives; N-(carbobenzoxy)-derivatives and pharmaceutically acceptable acid addition salts of said compounds; their use as antibacterial agents; and processes for their preparation.
Inventors
- 👤 Frank C. Sciavolino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:49
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08; A; A61; A61P; A61P31/00; A61P31/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
37 words
A compound of formula I ##STR4## wherein R 1 is hydrogen or N-carbobenzoxy; and R 2 is hydrogen, acetyl, propionyl or 3-carbethoxypropionyl; or the pharmaceutically acceptable acid addition salts of those compounds wherein R 1 is hydrogen.
Claim 2
Dependent Claim
37 words
A compound of formula I ##STR4## wherein R 1 is hydrogen or N-carbobenzoxy; and R 2 is hydrogen, acetyl, propionyl or 3-carbethoxypropionyl; or the pharmaceutically acceptable acid addition salts of those compounds wherein R 1 is hydrogen.
Claim 3
Dependent Claim
20 words
A compound according to claim 1, formula I, wherein R 1 is hydrogen and R 1 NH has the 9(S)-configuration.
Claim 4
Dependent Claim
11 words
The compound according to claim 2 wherein R 2 is hydrogen.
Claim 5
Dependent Claim
11 words
The compound according to claim 2 wherein R 2 is acetyl.
Claim 6
Dependent Claim
11 words
The compound according to claim 2 wherein R 2 is propionyl.
Claim 7
Dependent Claim
11 words
The compound according to claim 2 wherein R 2 is 3-carbethoxypropionyl.
Claim 8
Dependent Claim
13 words
A compound according to claim 1, formula I, wherein R 1 is carbobenzoxy.
Claim 9
Dependent Claim
11 words
The compound according to claim 7 wherein R 2 is hydrogen.
Claim 10
Dependent Claim
11 words
The compound according to claim 7 wherein R 2 is acetyl.
Claim 11
Dependent Claim
11 words
The compound according to claim 7 wherein R 2 is 3-carbethoxypropionyl.
Claim 12
Dependent Claim
11 words
The compound according to claim 7 wherein R 2 is propionyl.
References Cited (Backward Citations)
US3417077A
Cited
US4150220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |