US3923784A
Expired / Lapsed
US
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Erythromycin a derivatives
Assignee: F Hoffmann La Roche AG
•
Filing: 1974-02-19
•
Granted: 1975-12-02
•
Expires: 1994-02-19
Abstract
Abstract Novel derivatives of erythromycin A, formed by the cleavage of the cladinose sugar moiety, are disclosed. These compounds are useful as antimicrobial agents.
Inventors
- 👤 Richard W Kierstead
- 👤 Ronald A Lemahieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:31
CPC Classifications
C; C07; C07H; C07H17/00; C07H17/04; C07H17/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
11 words
The compound of claim 1 of the formula 3-(3-methoxybenzoyl)-5-O-desosaminylerythronolide A oxime.
Claim 4
Dependent Claim
11 words
The compound of claim 1 of the formula 3-(3-chlorobenzoyl)-5-O-desosaminylerythronolide A oxime.
Claim 5
Dependent Claim
11 words
The compound of claim 1 of the formula 3-(3-nitrobenzoyl)-5-O-desosaminylerythronolide A oxime.
Claim 6
Dependent Claim
11 words
The compound of claim 1 of the formula 3-(trans-3-methoxycyclohexanecarbonyl)-5-O-desosaminylerythronolide A oxime.
Claim 7
Dependent Claim
3 words
5-O-desosaminylerythronolide A oxime.
Claim 8
Dependent Claim
3 words
5-O-desosaminylerythronolide A oxime.
Claim 9
Dependent Claim
5 words
A compound of the formula
Claim 10
Dependent Claim
5 words
A compound of the formula
Claim 11
Dependent Claim
11 words
The compound of claim 7 of the formula 2''-acetyl-5-O-desosaminylerythronolide A acetoxime.
Claim 12
Dependent Claim
5 words
A compound of the formula
Claim 13
Dependent Claim
5 words
A compound of the formula
Claim 14
Dependent Claim
11 words
The compound of claim 9 of the formula 2''-acetyl-3benzoyl-erythronolide A acetoxime.
References Cited (Backward Citations)
US3478014A
Cited
US3736313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |