Patent US4957930A successfully refreshed from Google Patents.
US4957930A
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Dihydropyridine derivatives
Assignee: Pfizer Inc
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Filing: 1988-04-20
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Granted: 1990-09-18
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Expires: 2008-04-20
Abstract
Abstract Dihydropyridines having unsaturated side chains are disclosed. The compounds are useful anti-ischemic and antihypertensive agents.
Inventors
- 👤 David Alker
- 👤 Peter E. Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/80; C07D211/82; C07D211/84; C07D211/90; A; A61; A61P; A61P9/00; A61P9/08; A61P9/10; A61P9/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A compound of the formula ##STR11## or a pharmaceutically acceptable acid addition salt thereof where R is selected from the group consisting of phenyl, phenyl substituted by one or two substituents selected from the group consisting of halo and CF 3 , and 2-chloro-3-pyridyl; R 1 and R 2 are each independently methyl or ethyl; X is O or S; Y is --CH═CH or --C.tbd.C--; and Z is CHR 5 OH wherein R 5 is H, n-butyl, or phenyl; --CO 2 R 6 where R 6 is H; ##STR12## wherein R 3 and R 4 are each independently methyl; or when taken together with the N atom to which they are attached form a pyrrolidinyl, piperidino, morpholino, piperazinyl or N(C 1 -C 4 )alkyl piperazinyl group.
Claim 2
Dependent Claim
126 words
A compound of the formula ##STR11## or a pharmaceutically acceptable acid addition salt thereof where R is selected from the group consisting of phenyl, phenyl substituted by one or two substituents selected from the group consisting of halo and CF 3 , and 2-chloro-3-pyridyl; R 1 and R 2 are each independently methyl or ethyl; X is O or S; Y is --CH═CH or --C.tbd.C--; and Z is CHR 5 OH wherein R 5 is H, n-butyl, or phenyl; --CO 2 R 6 where R 6 is H; ##STR12## wherein R 3 and R 4 are each independently methyl; or when taken together with the N atom to which they are attached form a pyrrolidinyl, piperidino, morpholino, piperazinyl or N(C 1 -C 4 )alkyl piperazinyl group.
Claim 3
Dependent Claim
17 words
A compound according to claim 1 wherein R 1 and R 2 are each methyl or ethyl.
Claim 4
Dependent Claim
20 words
A compound according to claim 1 wherein when Z is CHR 5 OH, R 5 is phenyl, n-butyl or hydrogen.
Claim 5
Dependent Claim
20 words
A compound according to claim 1 wherein when Z is CHR 5 OH, R 5 is phenyl, n-butyl or hydrogen.
Claim 6
Dependent Claim
20 words
A compound according to claim 1 wherein when Z is CHR 5 OH, R 5 is phenyl, n-butyl or hydrogen.
Claim 7
Dependent Claim
29 words
A pharmaceutical composition comprising a compound according to claim 1, in an amount effective for the treatment of ischaemia and hypertension, together with a pharmaceutically effective carrier or diluent.
Claim 8
Dependent Claim
29 words
A method for the treatment of ischaemia and hypertension comprising administering to a mammal in need of such treatment an effective amount of a compound according to claim 1.
References Cited (Backward Citations)
US4532248A
Cited
US4654353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |