Patent US3818065A successfully refreshed from Google Patents.
US3818065A
Expired / Lapsed
US
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Production of aminoacid precursors
Assignee: BASF SE
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Filing: 1971-12-22
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Granted: 1974-06-18
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Expires: 1991-12-22
Abstract
Abstract The invention relates to the substitution of one or two hydrogen atoms on the Alpha -carbon atom of an Alpha -isocyanocarboxylic acid derivative by means of an alkylating agent and using a metallizing agent.
Inventors
- 👤 D Hoppe
- 👤 R Jentsch
- 👤 U Schoellkopf
- 👤 F Gerhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:29
CPC Classifications
C; C07; C07C; C07C251/00; C07D; C07D309/00; C07D309/02; C07D309/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
10 words
A process for production of a compound of the formula
Claim 2
Dependent Claim
10 words
A process for production of a compound of the formula
Claim 3
Dependent Claim
31 words
A process as claimed in claim 1 wherein the Alpha -metallized isocyanocarboxylic ester is formed by bringing together a metallizing agent of the metal M and a compound of the formula
Claim 4
Dependent Claim
31 words
A process as claimed in claim 2 wherein the Alpha -metallized isocyanocarboxylic ester is formed by bringing together a metallizing agent of the metal M and a compound of the formula
Claim 5
Dependent Claim
31 words
A process as claimed in claim 3 wherein the Alpha -metallized isocyanocarboxylic ester is formed by bringing together a metallizing agent of the metal M and a compound of the formula
Claim 6
Dependent Claim
21 words
A process as claimed in claim 1 carried out with the molar ratio of isocyanocarboxylic ester to alkylating agent about 1:1.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 2 carried out with the molar ratio of isocyanocarboxylic ester to alkylating agent about 1:2 at -40*C to +70*C.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 3 carried out with the molar ratio of isocyanocarboxylic ester to alkyl dihalide about 2:1.
Claim 9
Dependent Claim
17 words
A process as claimed in claim 1 wherein R1 denotes alkyl having one to four carbon atoms.
Claim 10
Dependent Claim
17 words
A process as claimed in claim 3 wherein R1 denotes alkyl having one to four carbon atoms.
Claim 11
Dependent Claim
58 words
A process as claimed in claim 2 wherein M in said formula of said ester is first replaced by the radical R4 by alkylation with one of said alkylating agents and the hydrogen atom on the metallized carbon is replaced by the radical R5 by further alkylation with one of said alkylating agents via the intermediary radical M.
Claim 12
Dependent Claim
33 words
A process as claimed in claim 1 wherein R1 denotes alkyl with one to four carbon atoms, phenyl, cyclohexyl, alkoxyalkyl, alkylthioalkyl, and R2 denotes alkyl of one to four carbon atoms or benzyl.
Claim 13
Dependent Claim
33 words
A process as claimed in claim 3 wherein R1 denotes alkyl with one to four carbon atoms, phenyl, cyclohexyl, alkoxyalkyl, alkylthioalkyl, and R2 denotes alkyl of one to four carbon atoms or benzyl.
Claim 14
Dependent Claim
19 words
A process as claimed in claim 2 wherein R2 denotes alkyl of one to four carbon atoms or benzyl.
References Cited (Backward Citations)
US3712911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |