US4192945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing proline and homoproline derivatives
Assignee: ER Squibb and Sons LLC
•
Filing: 1979-03-15
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Granted: 1980-03-11
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Expires: 1999-03-15
Abstract
Abstract Compounds having the formula ##STR1## wherein R is hydrogen or alkyl, n is 0 or 1 and m is 1 or 2 have hypotensive activity. Those compounds of the above formula wherein n is 1 are useful intermediates for the preparation of other hypotensive agents having the formula ##STR2##
Inventors
- 👤 Miguel A. Ondetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:08
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
38 words
A process for preparing a compound having the formula ##STR12## which comprises hydrolyzing the corresponding compound having the formula ##STR13## wherein R is hydrogen or alkyl of 1 to 7 carbon atoms and m is 1 or 2.
Claim 2
Dependent Claim
38 words
A process for preparing a compound having the formula ##STR12## which comprises hydrolyzing the corresponding compound having the formula ##STR13## wherein R is hydrogen or alkyl of 1 to 7 carbon atoms and m is 1 or 2.
Claim 3
Dependent Claim
11 words
A process in accordance with claim 1 wherein m is 1.
Claim 4
Dependent Claim
11 words
A process in accordance with claim 1 wherein m is 2.
Claim 5
Dependent Claim
11 words
A process in accordance with claim 1 wherein R is hydrogen.
Claim 6
Dependent Claim
17 words
A process in accordance with claim 1 wherein R is alkyl of 1 to 7 carbon atoms.
Claim 7
Dependent Claim
11 words
A process in accordance with claim 5 wherein R is methyl.
References Cited (Backward Citations)
US4105776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |