US4248879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzopyranotriazoles
Assignee: Beecham Group PLC
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Filing: 1979-07-16
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Granted: 1981-02-03
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Expires: 1999-07-16
Abstract
Abstract Compounds of the formula (I): ##STR1## and pharmaceutically acceptable salts thereof wherein R 1 , R 2 , R 3 and R 4 which may be the same of different, represent hydrogen, halogen, nitro, lower alkyl, and lower alkoxy, or any adjacent two of R 1 to R 4 taken together represent an alkylene group containing from 3 to 5 carbon atoms or a 1,4-buta-1,3-dienylene group are disclosed. The compounds are useful as anti-allergic agents.
Inventors
- 👤 Derek R. Buckle
- 👤 Harry Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:40
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/04; C07D249/00; C07D249/02; C07D249/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A compound selected from the group consisting of a benzopyranotriazole of the formula: ##STR21## and pharmaceutically acceptable salts thereof, wherein each of R 1 , R 2 , R 3 and R 4 taken independently of the others is hydrogen, halo, nitro, lower alkyl or lower alkoxy, or any adjacent two of R 1 , R 2 , R 3 and R 4 taken together are alkylene of from 3 to 5 carbon atoms or 1,4buta-1,3-dienylene.
Claim 2
Dependent Claim
76 words
A compound selected from the group consisting of a benzopyranotriazole of the formula: ##STR21## and pharmaceutically acceptable salts thereof, wherein each of R 1 , R 2 , R 3 and R 4 taken independently of the others is hydrogen, halo, nitro, lower alkyl or lower alkoxy, or any adjacent two of R 1 , R 2 , R 3 and R 4 taken together are alkylene of from 3 to 5 carbon atoms or 1,4buta-1,3-dienylene.
Claim 3
Dependent Claim
31 words
A compound according to claim 1, wherein each of R 1 , R 2 , R 3 and R 4 is hydrogen, methyl, ethyl, n-propyl, methoxy, ethoxy, n-propoxy, fluoro or chloro.
Claim 4
Dependent Claim
24 words
A compound according to claim 2 wherein at least one of R 1 , R 2 , R 3 and R 4 is hydrogen.
Claim 5
Dependent Claim
22 words
A compound according to claim 3, wherein two of R 1 , R 2 , R 3 and R 4 are hydrogen.
Claim 6
Dependent Claim
33 words
A compound according to claim 4 wherein each of R 1 and R 4 is hydrogen, and each of R 2 and R 3 independently of the other is methyl, ethyl or n-propyl.
Claim 7
Dependent Claim
11 words
A compound according to claim 1 which is the sodium salt.
Claim 8
Dependent Claim
1 words
6,7-Dimethyl-9-oxo-1H,9H-benzopyrano[2,3-d]-v-triazole.
Claim 9
Dependent Claim
1 words
6,7-Dimethyl-9-oxo-1H,9H-benzopyrano[2,3-d]-v-triazole.
Claim 10
Dependent Claim
11 words
The compound according to claim 7 which is the sodium salt.
Claim 11
Dependent Claim
1 words
7,8-Dimethyl-9-oxo-1H,9H-benzopyran[2,3-d]-v-triazole.
Claim 12
Dependent Claim
1 words
7,8-Dimethyl-9-oxo-1H,9H-benzopyran[2,3-d]-v-triazole.
Claim 13
Dependent Claim
11 words
The compound according to claim 9 which is the sodium salt.
Claim 14
Dependent Claim
20 words
A pharmaceutical composition comprising an antiallergically effective amount of a compound according to claim 1 and a pharmaceutically acceptable carrier.
Claim 15
Dependent Claim
76 words
A compound of the formula: ##STR22## wherein each of R 1 , R 2 , R 3 and R 4 taken independently of the others is hydrogen, halo, nitro, lower alkyl or lower alkoxy, or any adjacent two of R 1 , R 2 , R 3 and R 4 taken together are alkylene of from 3 to 5 carbon atoms or ,4-buta-1,3-dienylene, and Q is benzyl substituted with alkoxy of 1 to 6 carbon atoms.
Claim 16
Dependent Claim
76 words
A compound of the formula: ##STR22## wherein each of R 1 , R 2 , R 3 and R 4 taken independently of the others is hydrogen, halo, nitro, lower alkyl or lower alkoxy, or any adjacent two of R 1 , R 2 , R 3 and R 4 taken together are alkylene of from 3 to 5 carbon atoms or ,4-buta-1,3-dienylene, and Q is benzyl substituted with alkoxy of 1 to 6 carbon atoms.
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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |