Patent US3887585A successfully refreshed from Google Patents.
US3887585A
Expired / Lapsed
US
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Polycyclic gamma-pyrone-3-carboxaldehyde derivatives
Assignee: Warner Lambert Co LLC
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Filing: 1974-06-19
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Granted: 1975-06-03
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Expires: 1994-06-19
Abstract
Abstract Novel polycyclic gamma-pyrone derivatives having a carboxaldehyde group on the 3-position and optionally substituted on the 5, 6, 7, 8, 9 or 10 positions with a hydroxy, lower alkyl or lower alkoxy group are disclosed, as well as the corresponding N-substituted, formyl imine derivatives thereof. These compounds, and pharmaceutical compositions containing these compounds, are useful for the treatment of allergic conditions and for the treatment of hyperacidity.
Inventors
- 👤 Daniel Kaminsky
- 👤 Sylvester Klutchko
- 👤 Strandtmann Maximilian Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:40
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/92; C07F; C07F5/00; C07F5/02; C07F5/022
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
6 words
A COMPOUND OF THE FORMULA I:
Claim 2
Dependent Claim
6 words
A COMPOUND OF THE FORMULA I:
Claim 3
Dependent Claim
6 words
A compound of the formula I:
Claim 4
Dependent Claim
6 words
A compound of the formula I:
Claim 5
Dependent Claim
29 words
A compound according to claim 1 wherein the Z ring has the (a) structure and R represents hydrogen, hydroxy, methyl or methoxy, and the corresponding N-substituted, 3-formimide derivatives thereof.
Claim 6
Dependent Claim
22 words
A compound according to claim 1 wherein the Z ring has the structure (b), (c), (d), or (e) and R represents hydrogen.
Claim 7
Dependent Claim
9 words
A compound according to claim 1 which is 5,6-dihydro-4-oxo-4H-naphtho(1,2-b)pyran-3-carboxaldehyde.
Claim 8
Dependent Claim
9 words
A compound according to claim 1 which is 5,6-dihydro-6-methyl-4-oxo-4H-naphtho(1,2-b)pyran-3-carboxaldehyde.
Claim 9
Dependent Claim
9 words
A compound according to claim 1 which is 5,6-dihydro-7-hydroxy-4-oxo-4H-naphtho(1,2-b)pyran-3-carboxaldehyde.
Claim 10
Dependent Claim
13 words
A compound according to claim 1 which is 5,6-dihydro-7-hydroxy-3-(N-veratryl formimidoyl)-4H-naphtho(1,2-b)pyran-4-one and its monohydrate.
Claim 11
Dependent Claim
9 words
A compound according to claim 1 which is 5,6-dihydro-7-methoxy-4-oxo-4H-naphtho(1,2-b)pyran-3-carboxaldehyde.
Claim 12
Dependent Claim
9 words
A compound according to claim 1 which is 5,6-dihydro-8-methoxy-4-oxo-4H-naphtho(1,2-b)pyran-3-carboxaldehyde.
Claim 13
Dependent Claim
9 words
A compound according to claim 1 which is 4-oxo-indeno(3,2-b)pyran-3(5H)-carboxaldehyde.
Claim 14
Dependent Claim
10 words
A compound according to claim 1 which is 4-oxo-4H-naphtho(2, 3-b)pyran-3-carboxaldehyde.
Claim 15
Dependent Claim
9 words
A compound according to claim 1 which is 6,7,8,9-tetrahydro-4-oxo-4H-naphtho(2,3-b)pyran-3-carboxaldehyde.
References Cited (Backward Citations)
BE769146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |