US3725407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6-substituted amino-3-nitroimidazo(1,2-b)pyridazines and methods of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1971-04-08
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Granted: 1973-04-03
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Expires: 1991-04-08
Abstract
Abstract The preparation of 6-substituted amino-3-nitroimidazo-(1,2b)pyridazines by reacting a 6-amino or substituted amino-3nitroimidazo(1,2-b)pyridazine with an acid chloride or acid anhydride, is described. Other methods of preparing 6-substituted amino-3-nitroimidazo(1,2-b)pyridazines are described. The compounds are useful for their antiprotozoal and particularly antitrichomonal and antiamebic activity in warm-blooded animals.
Inventors
- 👤 A Tomcufcik
- 👤 P Izzo
- 👤 P Fabio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:30
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
7 words
The nitroimidazopyridazine according to claim 1, 6-acetamido-3-nitroimidazo(1,2-b)pyridazine.
Claim 2
Dependent Claim
7 words
The nitroimidazopyridazine according to claim 1, 3-nitro-6-propionamidoimidazo(1,2-b)pyridazine.
Claim 3
Dependent Claim
7 words
The nitroimidazopyridazine according to claim 1, 6-butyramido-3-nitroimidazo(1,2-b)pyridazine.
Claim 4
Dependent Claim
7 words
The nitroimidazopyridazine according to claim 1, 6-lauramido-3-nitroimidazo(1,2-b)pyridazine.
Claim 5
Dependent Claim
7 words
The nitroimidazopyridazine according to claim 1, 6-(N-methylacetamido)-3-nitroimidazo(1,2-b)pyridazine.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |