Patent US4198517A successfully refreshed from Google Patents.
US4198517A
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Histidine derivatives
Assignee: ER Squibb and Sons LLC
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Filing: 1978-12-26
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Granted: 1980-04-15
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Expires: 1998-12-26
Abstract
Abstract New derivatives of amino acids which have the general formula ##STR1## are useful as angiotensin converting enzyme inhibitors.
Inventors
- 👤 Miguel A. Ondetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:13
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/64; C07C; C07C327/00; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16; C07D207/46; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A compound of the formula ##STR10## and basic salts thereof, wherein R is hydroxy or lower alkoxy; R 1 is hydrogen, lower alkanoyl, benzoyl or ##STR11## A is hydrogen, lower alkyl or hydroxy-lower alkylene; B is imidazolyl-lower alkylene; X is carboxy, lower alkoxycarbonyl, cyano, carbamoyl, N-substituted carbamoyl wherein the N-substitutent is lower alkyl or phenyl-lower alkylene; m is 0 or 1; and n is 0, 1, 2, 3 or 4.
Claim 2
Dependent Claim
70 words
A compound of the formula ##STR10## and basic salts thereof, wherein R is hydroxy or lower alkoxy; R 1 is hydrogen, lower alkanoyl, benzoyl or ##STR11## A is hydrogen, lower alkyl or hydroxy-lower alkylene; B is imidazolyl-lower alkylene; X is carboxy, lower alkoxycarbonyl, cyano, carbamoyl, N-substituted carbamoyl wherein the N-substitutent is lower alkyl or phenyl-lower alkylene; m is 0 or 1; and n is 0, 1, 2, 3 or 4.
Claim 3
Dependent Claim
11 words
A compound as in claim 1 wherein R 1 is ##STR12##
Claim 4
Dependent Claim
11 words
A compound as in claim 1 wherein X is lower alkoxycarbonyl.
Claim 5
Dependent Claim
10 words
A compound as in claim 1 wherein X is carbamoyl.
Claim 6
Dependent Claim
10 words
A compound as in claim 1 wherein B is imidazol-4-ylmethyl.
Claim 7
Dependent Claim
32 words
A compound as in claim 5 wherein A and R 1 each is hydrogen; R is hydroxy; X is methoxycarbonyl; and m and n each is 1, having the name N.sup.α -[3-mercapto-2-(methoxycarbonylmethyl)propanoyl]-L-histidine.
Claim 8
Dependent Claim
32 words
A compound as in claim 5 wherein A and R 1 each is hydrogen; R is hydroxy; X is carbamoyl; and m and n each is 1, having the name N.sup.α -[3-mercapto-2(carbamoylmethyl)propanoyl]-L-histidine.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |