US4474692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L-Alanyl-N-(indan-2-yl)glycine, its esters and salts thereof
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1983-05-12
•
Granted: 1984-10-02
•
Expires: 2003-05-12
Abstract
Abstract Useful intermediates for the preparation of hypotensives and inhibitors of angiotensin converting enzymes are L-alanyl-N-(indan-2-yl)glycine, its lower alkyl esters and the salts thereof.
Inventors
- 👤 Yoshikazu Oka
- 👤 Kohei Nishikawa
- 👤 Akio Miyake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:35
CPC Classifications
C; C07; C07C; C07C213/00; C07C213/08; C07K; C07K5/00; C07K5/02; C07K5/022; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
10 words
L-alanyl-N-(indan-2-yl)glycine or a C 1-4 -alkyl ester or salt thereof.
Claim 2
Dependent Claim
10 words
L-alanyl-N-(indan-2-yl)glycine or a C 1-4 -alkyl ester or salt thereof.
Claim 3
Dependent Claim
1 words
L-alanyl-N-(indan-2-yl)glycine.
Claim 4
Dependent Claim
1 words
L-alanyl-N-(indan-2-yl)glycine.
Claim 5
Dependent Claim
11 words
A C 1-4 -alkyl ester of L-alanyl-N-(indan-2-yl)glycine according to claim 1.
Claim 6
Dependent Claim
3 words
L-alanyl-N-(indan-2-yl)glycine tert-butyl ester.
Claim 7
Dependent Claim
3 words
L-alanyl-N-(indan-2-yl)glycine tert-butyl ester.
Claim 8
Dependent Claim
14 words
A compound according to claim 1 in the form of an acid addition salt.
Claim 9
Dependent Claim
4 words
L-alanyl-N-(indan-2-yl)glycine tert-butyl ester oxalate.
Claim 10
Dependent Claim
4 words
L-alanyl-N-(indan-2-yl)glycine tert-butyl ester oxalate.
References Cited (Backward Citations)
GB2095682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |