Patent US3950348A successfully refreshed from Google Patents.
US3950348A
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Process for preparing e-pyridyl-4-methyloxycarbonyllysine
Assignee: Merck and Co Inc
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Filing: 1973-09-06
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Granted: 1976-04-13
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Expires: 1993-09-06
Abstract
Abstract A process for preparing peptides containing lysine wherein the terminal amino group of lysine is protected by a pyridyl-4-methyloxycarbonyl group during formation of the peptide and removing this group with zinc in acid.
Inventors
- 👤 Ralph F. Hirschmann
- 👤 Daniel F. Veber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:29
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/06; C07K1/061; C07K1/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
The process for the preparation of ε-pyridyl-4-methyloxycarbonyllysine which comprises reacting a copper complex of lysine with pyridyl-4-methyl-succinimide carbonate at a pH of 7-12.
Claim 2
Dependent Claim
23 words
The process for the preparation of ε-pyridyl-4-methyloxycarbonyllysine which comprises reacting a copper complex of lysine with pyridyl-4-methyl-succinimide carbonate at a pH of 7-12.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |