US3725405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,4,7-TRISUBSTITUTED-{8 PYRIDO 2,3-d{9 PYRIMIDINE-6-CARBOXAMIDES
Assignee: Wyeth LLC
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Filing: 1970-06-18
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Granted: 1973-04-03
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Expires: 1990-06-18
Abstract
Abstract Novel 2,4,7-trisubstituted-pyrido(2,3-d)pyrimidine-6carboxamides have been produced which have central nervous system depressant activity and are useful pharmacological agents in the calming of animals.
Inventors
- 👤 A Santilli
- 👤 D Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
A compound as defined in claim 1 wherein R1 is phenyl or (lower) alkylthio; R2 is cyclohexyl; (lower)alkoxy-ethyl, di(lower)alkylaminoethyl, or morpholino; and R5 is hydroxy or amino.
Claim 2
Dependent Claim
11 words
A compound as described in claim 2 which is: 4,7-diamino-N-cyclohexyl-2-(methylthio)pyrido(2,3-d)pyrimidine -6-carboxamide.
Claim 3
Dependent Claim
11 words
A compound as described in claim 2 which is: 4,7-diamino-N-(2-dimethylaminoethyl)-2-(methylthio)pyrido(2,3-d)-pyrimidine -6carboxamide.
Claim 4
Dependent Claim
11 words
A compound as described in claim 2 which is: 4,7-diamino-N-(2-methoxyethyl)-2-phenylpyrido(2,3-d)pyrimidine -6-carboxamide.
Claim 5
Dependent Claim
11 words
A compound as described in claim 2 which is: 4,7-diamino-N-(2-morpholinoethyl)-2-phenylpyrido(2,3-d)pyrimidine -6-carboxamide.
Claim 6
Dependent Claim
11 words
A compound as described in claim 2 which is: 4-amino-7-hydroxy-N-(2-methoxyethyl)-2-phenylpyrido(2,3-d)-pyrimidine-6 -carboxamide.
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 |