US4035368A
Expired / Lapsed
US
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Substituted 3-(1H-tetrazol-5-yl)-quinoline compounds
Assignee: Riker Laboratories Inc
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Filing: 1975-04-02
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Granted: 1977-07-12
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Expires: 1995-04-02
Abstract
Abstract Substituted 4-hydroxy-3-(1H-tetrazol-5-yl)-quinoline compounds are prepared by reacting substituted 3-cyano-4-hydroxyquinolines with sodium azide to provide useful anti-allergic compounds.
Inventors
- 👤 Edward H. Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:36
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D215/54; C07D215/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
31 words
A compound of the formula ##STR59## wherein R is halogen, lower alkyl, lower alkoxy, lower alkylthio, lower alkylsulfinyl, lower alkylsulfonyl, trifluoromethyl or lower alkylsulfonamido and n is zero, one or two.
Claim 2
Dependent Claim
31 words
A compound of the formula ##STR59## wherein R is halogen, lower alkyl, lower alkoxy, lower alkylthio, lower alkylsulfinyl, lower alkylsulfonyl, trifluoromethyl or lower alkylsulfonamido and n is zero, one or two.
Claim 3
Dependent Claim
18 words
A compound according to claim 1 wherein R is halogen, methoxy or lower alkyl and n is one.
Claim 4
Dependent Claim
7 words
The compound 8-chloro-4-hydroxy-3-(1H-tetrazol-5-yl)quinoline according to claim 1.
Claim 5
Dependent Claim
7 words
The compound 4-hydroxy-8-methoxy-3-(1H-tetrazol-5-yl)quinoline according to claim 1.
Claim 6
Dependent Claim
7 words
The compound 6-fluoro-4-hydroxy-3-(1H-tetrazol-5-yl)quinoline according to claim 1.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |