US3758525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing n-higher aliphatic acyl acidic amino acids
Assignee: Ajinomoto Co Inc
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Filing: 1970-03-20
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Granted: 1973-09-11
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Expires: 1990-03-20
Abstract
Abstract The halides of aliphatic carboxylic acids having 8 to 22 carbon atoms can be reacted with acidic amino acids to form N-acyl amino acids in very good yields if the reaction is carried out in an alkaline solvent medium of 20 - 85 percent (vol.) water and 80 15 percent acetone, methylethylketone, dioxane, tetrahydrofuran, tert-butanol, or cyclohexanone.
Inventors
- 👤 R Yoshida
- 👤 I Yoshimura
- 👤 M Takehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:15
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/45; A; A01; A01N; A01N37/00; A01N37/44; A01N37/46; C07C233/46; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
14 words
In a method as set forth in claim 1, said halide moiety being chlorine.
Claim 2
Dependent Claim
32 words
In a method as set forth in claim 2, said medium essentially consisting of 40 to 80 volume percent water, 60 to 20 volume percent of said solvent, and said alkaline material.
Claim 3
Dependent Claim
26 words
In a method as set forth in claim 2, said medium containing an amount of alkaline material sufficient to make the pH thereof 11.0 to 13.0.
Claim 4
Dependent Claim
24 words
In a method as set forth in claim 2, said medium having a temperature between -20*C and the refluxing temperature of the reaction mixture.
Claim 5
Dependent Claim
19 words
In a method as set forth in claim 2, the formed N-acyl amino acid being recovered from said medium.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |