GB470468A - Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids - Google Patents
Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acidsInfo
- Publication number
- GB470468A GB470468A GB438436A GB438436A GB470468A GB 470468 A GB470468 A GB 470468A GB 438436 A GB438436 A GB 438436A GB 438436 A GB438436 A GB 438436A GB 470468 A GB470468 A GB 470468A
- Authority
- GB
- United Kingdom
- Prior art keywords
- monobenzoyl
- carbamido
- lysine
- aqueous
- diaminocarboxylic acids
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/18—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas
- C07C273/1809—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of substituted ureas with formation of the N-C(O)-N moiety
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Aliphatic a o -diaminocarboxylic acids substituted in the a -amino group are heated with cyanic acid or a cyanate to form the corresponding urea. If desired, the substituent in the a -amino group, e.g. an acyl residue, is then removed by saponification. The reaction may be effected in aqueous or aqueous alkaline solution or in the presence of organic solvents; in the latter case it is necessary to acidify the reaction mixture and wash with water. The products possess therapeutic properties. According to the examples: (1) a -monobenzoylornithin is boiled with aqueous potassium cyanate, and dilute sulphuric acid then added to precipitate a -monobenzoyl - d - carbamidoornithin; on heating with dilute sulphuric acid for some hours, d - carbamido - ornithin is obtained; (2) a -monobenzoyl-lysine is treated with potassium cyanate as in (1) and the resulting a - monobenzoyl - e - carbamido-lysine then converted by saponification into e - carbamido-lysine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB438436A GB470468A (en) | 1936-02-13 | 1936-02-13 | Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB438436A GB470468A (en) | 1936-02-13 | 1936-02-13 | Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470468A true GB470468A (en) | 1937-08-13 |
Family
ID=9776147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB438436A Expired GB470468A (en) | 1936-02-13 | 1936-02-13 | Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB470468A (en) |
-
1936
- 1936-02-13 GB GB438436A patent/GB470468A/en not_active Expired
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