US3867364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the synthesis of leupeptins and their analogues
Assignee: Microbial Chemistry Research Foundation
•
Filing: 1972-11-30
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Granted: 1975-02-18
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Expires: 1992-11-30
Abstract
Abstract WHEREIN N, R1, R2, R3 are the same as described above. WHEREIN N, R1, R2, R3 are the same as described above, or the compound represented by the general formula: WHICH COMPRISES CHEMICALLY TREATING THE COMPOUND REPRESENTED BY THE GENERAL FORMULA: WHEREIN N 1 OR 0 R3 alkyl radical Synthesis of leupeptins and their analogues represented by the general formula:
Inventors
- 👤 Hamao Umezawa
- 👤 Shinichi Kondo
- 👤 Takaaki Aoyagi
- 👤 Tomio Takeuchi
- 👤 Kenji Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:14
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/06; C07K5/06008; C07K5/06017; C07K5/06034; C07K5/06052; C07K5/06043
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
9 words
LEUPEPTINS AND THEIR ANALOGUES REPRESENTED BY THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
LEUPEPTINS AND THEIR ANALOGUES REPRESENTED BY THE GENERAL FORMULA:
Claim 3
Dependent Claim
1 words
Acetyl-L-leucyl-L-leucyl-DL-argininal.
Claim 4
Dependent Claim
1 words
Acetyl-L-leucyl-L-leucyl-DL-argininal.
Claim 5
Dependent Claim
1 words
Propionyl-L-leucyl-L-leucyl-DL-argininal.
Claim 6
Dependent Claim
1 words
Propionyl-L-leucyl-L-leucyl-DL-argininal.
Claim 7
Dependent Claim
1 words
Acetyl-L-isoleucyl-L-valyl-DL-argininal.
Claim 8
Dependent Claim
1 words
Acetyl-L-isoleucyl-L-valyl-DL-argininal.
Claim 9
Dependent Claim
1 words
Propionyl-L-isoleucyl-L-valyl-DL-argininal.
Claim 10
Dependent Claim
1 words
Propionyl-L-isoleucyl-L-valyl-DL-argininal.
Claim 11
Dependent Claim
1 words
Acetyl-L-valyl-L-leucyl-DL-argininal.
Claim 12
Dependent Claim
1 words
Acetyl-L-valyl-L-leucyl-DL-argininal.
Claim 13
Dependent Claim
1 words
Propionyl-L-valyl-L-leucyl-DL-argininal.
Claim 14
Dependent Claim
1 words
Propionyl-L-valyl-L-leucyl-DL-argininal.
Claim 15
Dependent Claim
1 words
Acetyl-L-leucyl-DL-argininal.
Claim 16
Dependent Claim
1 words
Acetyl-L-leucyl-DL-argininal.
Claim 17
Dependent Claim
1 words
Propionyl-L-leucyl-DL-argininal.
Claim 18
Dependent Claim
1 words
Propionyl-L-leucyl-DL-argininal.
Claim 19
Dependent Claim
1 words
Acetyl-L-isoleucyl-DL-argininal.
Claim 20
Dependent Claim
1 words
Acetyl-L-isoleucyl-DL-argininal.
Claim 21
Dependent Claim
1 words
Propionyl-L-isoleucyl-DL-argininal.
Claim 22
Dependent Claim
1 words
Propionyl-L-isoleucyl-DL-argininal.
Claim 23
Dependent Claim
14 words
A process for the systhesis of leupeptins and their analogs represented by the formula:
Claim 24
Dependent Claim
14 words
A process for the systhesis of leupeptins and their analogs represented by the formula:
Claim 25
Dependent Claim
20 words
The process of claim 12 including the step of producing the starting alcohol by reducing a compound of the formula:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |