US3264279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the temporary protection of amino groups in amino-carboxylic acids and their derivatives
Assignee: BASF Corp
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Filing: 1960-08-02
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Granted: 1966-08-02
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Expires: 1980-08-02
Abstract
No abstract record available.
Inventors
- 👤 Schwyzer Robert
- 👤 Rittel Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
C; C09; C09B; C09B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR THE TEMPORARY PROTECTION, IN PEPTIDE SYNTHESIS OF THE AMINO GROUP OF THE AMINOALKYL RADICAL OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A(AMINOALKYL)-A-AMINO ACETIC ACIDS AND THEIR DERIVATIVES, IN WHICH THE A-AMINO GROUP IS BLOCKED BY A BLOCKING GROUP WHICH MAY BE ELIMINATED BY HYDROGENOLYSIS AND THE CARBOXYL GROUP IS IN THE FORM OF A MEMBER SELECTED FROM THE GROUP COSISTING OF FREE CARBOXYL, LOWER ALKYL ESTER, UNSUBSTITUTED HYDRAZIDE AND UNSUBSTITUTED AMIDE, WHICH COMPRISES ACYLATION AND SUBSEQUENT SPLITTING OFF OF THE ACYL GROUP, THE IMPROVEMENT WHEREIN THE SAID AMINO GROUP IS ACYLATED BY THE AZIDE OF CARBONIC ACID TERTIARY BUTYLSEMIESTER.
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR THE TEMPORARY PROTECTION, IN PEPTIDE SYNTHESIS OF THE AMINO GROUP OF THE AMINOALKYL RADICAL OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A(AMINOALKYL)-A-AMINO ACETIC ACIDS AND THEIR DERIVATIVES, IN WHICH THE A-AMINO GROUP IS BLOCKED BY A BLOCKING GROUP WHICH MAY BE ELIMINATED BY HYDROGENOLYSIS AND THE CARBOXYL GROUP IS IN THE FORM OF A MEMBER SELECTED FROM THE GROUP COSISTING OF FREE CARBOXYL, LOWER ALKYL ESTER, UNSUBSTITUTED HYDRAZIDE AND UNSUBSTITUTED AMIDE, WHICH COMPRISES ACYLATION AND SUBSEQUENT SPLITTING OFF OF THE ACYL GROUP, THE IMPROVEMENT WHEREIN THE SAID AMINO GROUP IS ACYLATED BY THE AZIDE OF CARBONIC ACID TERTIARY BUTYLSEMIESTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |