Patent US169659A successfully refreshed from Google Patents.
Patent US4585789A successfully refreshed from Google Patents.
US4585789A
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US
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New furanone derivatives, process for preparation thereof and use thereof
Assignee: Astellas Pharma Inc
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Filing: 1983-06-29
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Granted: 1986-04-29
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Expires: 2003-06-29
Abstract
Abstract Described are compounds of the formula: <IMAGE> Wherein A is a lower alkylene group; R1 is a carboxy, hydroxy, lower alkoxycarbonyl, lower alkoxycarbonylamino, phenyl(lower)alkyloxy, benzoyloxy or lower alkanoyloxy group; R2 is a hydrogen or halogen atom or a halo(lower)alkyl group; R3 is a hydrogen or halogen atom; R4 is hydroxy, lower alkoxy, lower alkanoyloxy or lower alkoxycarbonyloxy group; and R5 is a hydrogen or halogen atom; Q is the number of double bonds which is equal to 0 or 1; n is an integer of 0 or 1, provided that when Q is 0, n is 1 and when Q is 1, n is 0.
Inventors
- 👤 Masanori Okamoto
- 👤 Itsuo Uchida
- 👤 Kazuyoshi Umehara
- 👤 Masanobu Kohsaka
- 👤 Hiroshi Imanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:12
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/22; C07D307/00; C07D307/02; C07D307/04; A; A61; A61P; A61P27/00; A61P27/02; A61P27/12; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C43/164; C07C43/166; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D307/34; C07D307/56; C07D307/58; C07D307/60; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12; C12; C12N; C12N1/00; C12N1/14; C12N1/145; C12P; C12P17/00; C12P17/02; C12P17/04; C12R; C12R2001/00; C12R2001/645; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A compound of the following formula or its pharmaceutically acceptable salt: ##STR6## wherein A is a lower alkylene group; R 1 is a carboxy, hydroxy, lower alkoxycarbonyl, lower alkoxycarbonylamino phenyl(lower)alkyloxy, benzoloxy, or lower alkanoyloxy group; R 2 is a hydrogen or halogen atom or a halo(lower)alkyl group; R 3 is a hydrogen or halogen atom; R 4 is a hydroxy, lower alkoxy, lower alkanoyloxy or lower alkoxycarbonyloxy group and R 5 is a hydrogen or halogen atom; Q is the number of double bonds which is equal to 0 or 1; n is an integer of 0 or 1, provided that when Q is 0, n is 1 and when Q is 1, n is 0.
Claim 2
Dependent Claim
116 words
A compound of the following formula or its pharmaceutically acceptable salt: ##STR6## wherein A is a lower alkylene group; R 1 is a carboxy, hydroxy, lower alkoxycarbonyl, lower alkoxycarbonylamino phenyl(lower)alkyloxy, benzoloxy, or lower alkanoyloxy group; R 2 is a hydrogen or halogen atom or a halo(lower)alkyl group; R 3 is a hydrogen or halogen atom; R 4 is a hydroxy, lower alkoxy, lower alkanoyloxy or lower alkoxycarbonyloxy group and R 5 is a hydrogen or halogen atom; Q is the number of double bonds which is equal to 0 or 1; n is an integer of 0 or 1, provided that when Q is 0, n is 1 and when Q is 1, n is 0.
Claim 3
Dependent Claim
34 words
A pharmaceutical composition of aldose reductase inhibitory activity comprising an effective amount of a compound as defined in claim 1 or its pharmaceutically acceptable salt in admixture with a substantially non-toxic carrier or excipient.
Claim 4
Independent Claim
137 words
A method comprising administering an effective amount of a compound or its pharmaceutically acceptable salt to a subject in need of treatment of diabetic cataract and/or neuropathy, said compound being of the formula: ##STR7## wherein A is a lower alkylene group; R 1 is a carboxy, hydroxy, lower alkoxycarbonyl, lower alkoxycarbonylamino, phenyl(lower)alkyloxy, benzoyloxy or lower alkanoyloxy group; R 2 is a hydrogen or halogen atom or a halo(lower)alkyl group; R 3 is a hydrogen or halogen atom; R 4 is hydroxy, lower alkoxy, lower alkanoyloxy or lower alkoxycarbonyloxy group; and R 5 is a hydrogen or halogen atom; Q is the number of double bonds which is equal to 0 or 1; n is an integer of 0 or 1, provided that when Q is 0, n is 1 and when Q is 1, n is 0.
Claim 5
Independent Claim
137 words
A method comprising administering an effective amount of a compound or its pharmaceutically acceptable salt to a subject in need of treatment of diabetic cataract and/or neuropathy, said compound being of the formula: ##STR7## wherein A is a lower alkylene group; R 1 is a carboxy, hydroxy, lower alkoxycarbonyl, lower alkoxycarbonylamino, phenyl(lower)alkyloxy, benzoyloxy or lower alkanoyloxy group; R 2 is a hydrogen or halogen atom or a halo(lower)alkyl group; R 3 is a hydrogen or halogen atom; R 4 is hydroxy, lower alkoxy, lower alkanoyloxy or lower alkoxycarbonyloxy group; and R 5 is a hydrogen or halogen atom; Q is the number of double bonds which is equal to 0 or 1; n is an integer of 0 or 1, provided that when Q is 0, n is 1 and when Q is 1, n is 0.
Claim 6
Dependent Claim
11 words
A compound according to claim 1, which is 3-(4-hydroxy-5-oxo-3-phenyl-2,5-dihydro-2-furyl) propionic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |