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US4180666A
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3,9-Dihydro-3,9-dioxo-2H-indeno(2,1-c)-pyridine-4-(carbonitriles/carboxamides)
Assignee: GD Searle LLC
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Filing: 1978-12-26
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Granted: 1979-12-25
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Expires: 1998-12-26
Abstract
Abstract Preparation and use of anticonvulsant 3,9-dihydro-3,9-dioxo-2H-indeno[2,1-c]pyridine-4-(carbonitriles/carboxamides) are disclosed.
Inventors
- 👤 Robert J. Chorvat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:32
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07C; C07C45/00; C07C45/42; C07C45/43
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
27 words
A compound of the formula wherein R' represents hydrogen, alkyl containing fewer than 4 carbons, or phenyl; R" represents hydrogen or alkyl containing fewer than 4 carbons;
Claim 2
Dependent Claim
27 words
A compound of the formula wherein R' represents hydrogen, alkyl containing fewer than 4 carbons, or phenyl; R" represents hydrogen or alkyl containing fewer than 4 carbons;
Claim 3
Dependent Claim
8 words
A compound according to claim 1 which is
Claim 4
Dependent Claim
19 words
A compound according to claim 1 having the formula ##STR20## wherein R represents alkyl containing fewer than 4 carbons.
Claim 5
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-1-methyl-3,9-dioxo-2H-indeno-[2,1-c]pyridine-4-carbonitrile.
Claim 6
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-3,9-dioxo-1-phenyl-2H-indeno[2,1-c]pyridine-4-carbonitrile.
Claim 7
Dependent Claim
19 words
A compound according to claim 1 having the formula ##STR21## wherein R represents alkyl containing fewer than 4 carbons.
Claim 8
Dependent Claim
22 words
A compound according to claim 1 having the formula ##STR22## wherein R' and R" each represents alkyl containing fewer than 4 carbons.
Claim 9
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-2-methyl-3,9-dioxo-1-phenyl-2H-indeno[2,1-c]pyridine-4-carbonitrile.
Claim 10
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-3,9-dioxo-2H-indeno[2,1-c]pyridine-4-carboxamide.
Claim 11
Dependent Claim
19 words
A compound according to claim 1 having the formula ##STR23## wherein R represents alkyl containing fewer than 4 carbons.
Claim 12
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-1-methyl-3,9-dioxo-2H-indeno[2,1-c]pyridine-4-carboxamide.
Claim 13
Dependent Claim
9 words
A compound according to claim 1 which is 3,9-dihydro-3,9-dioxo-1,phenyl-2H-indeno[2,1-c]pyridine-4-carboxamide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |