GB628291A - Improvements in the production of ureido derivatives - Google Patents
Improvements in the production of ureido derivativesInfo
- Publication number
- GB628291A GB628291A GB951247A GB951247A GB628291A GB 628291 A GB628291 A GB 628291A GB 951247 A GB951247 A GB 951247A GB 951247 A GB951247 A GB 951247A GB 628291 A GB628291 A GB 628291A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphuric acid
- per cent
- trichloroethylidenemonoureide
- acid
- urea
- 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
- C07C273/1854—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 by reactions not involving the formation of the N-C(O)-N- moiety
- C07C273/1863—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 by reactions not involving the formation of the N-C(O)-N- moiety from urea
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Trichloroethylidenediureide is prepared by condensing trichloroethylidenemonoureide with urea in the presence of concentrated sulphuric acid, phosphorus pentoxide, or zinc chloride. It is preferred to use 9 per cent by weight of sulphuric acid, and not more than 10 per cent of phosphorus pentoxide. The reaction temperature should preferably not rise above 110 DEG C. Acetic acid may be employed as a diluent, and in this case up to 40 per cent, but preferably not more than 27 per cent of sulphuric acid may be used. In the examples: trichloroethylidenemonoureide is condensed with urea to give the diureide in the presence of (1) concentrated sulphuric acid; (2) phosphorus pentoxide, (3) zinc chloride; (4) and (5) concentrated sulphuric acid in the presence of acetic acid. In the Provisional Specifications, the preparation of the corresponding bromo-compound is disclosed, oleum and chlorosulphonic acid are mentioned as additional condensing agents, and the use of non-aqueous diluents in general is referred to. Trichloroethylidenemonoureide is prepared by heating urea and water in the presence of chloral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB951247A GB628291A (en) | 1947-04-10 | 1947-04-10 | Improvements in the production of ureido derivatives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB951247A GB628291A (en) | 1947-04-10 | 1947-04-10 | Improvements in the production of ureido derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB628291A true GB628291A (en) | 1949-08-25 |
Family
ID=9873390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB951247A Expired GB628291A (en) | 1947-04-10 | 1947-04-10 | Improvements in the production of ureido derivatives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB628291A (en) |
-
1947
- 1947-04-10 GB GB951247A patent/GB628291A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB628291A (en) | Improvements in the production of ureido derivatives | |
| GB994607A (en) | Process for preparing fluoroalkanols | |
| GB581635A (en) | Improvements in or relating to the manufacture of chloral | |
| GB607445A (en) | A process for the manufacture of zinc peroxide | |
| GB910207A (en) | Preparation of potassium hydrogen fluoride | |
| GB640213A (en) | Improvements in recovery of chlorobenzene | |
| GB695592A (en) | Improvements relating to beta-bromo-alpha-chloro-beta-formylacrylic acid and method of preparing same | |
| GB489612A (en) | Manufacture of fluorene derivatives | |
| GB608708A (en) | Improvements in the manufacture of aerating powders and calcium pyrophosphate compounds | |
| GB620134A (en) | Improvements in and relating to the production of di-(ú-chlorophenyl)-trichlorethane | |
| GB424047A (en) | Process for the preparation of dichloracetic acid | |
| GB654494A (en) | Process for the preparation of ditolylethane | |
| GB701414A (en) | Improvements in the production of chondroitin polysulphuric acid esters | |
| GB868573A (en) | A process for the manufacture of pivalic acid | |
| GB670501A (en) | Improvements in or relating to the manufacture of melamine | |
| GB855880A (en) | Production of alpha hydroxyisobutyric acid | |
| GB608835A (en) | Polystyrene composition and methods of making the same | |
| GB357985A (en) | The manufacture of dichloro-2-methyl-anthraquinones | |
| GB663552A (en) | Process of preparing 2,4-dihydroxybenzene-sulfonic acid | |
| GB462337A (en) | Manufacture of 2:6-dimethylnapththalene-7-sulphonic acid | |
| Sasaki | Studies on Nitration of Furan Derivatives. Part I. On the Nitration of Furan-carboxylic Acid | |
| GB584788A (en) | Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol | |
| GB794023A (en) | Process for production of uranium hexafluoride | |
| GB823640A (en) | Preparation of bis-2:2-(p-hydroxyphenyl propane | |
| GB616762A (en) | Improvements in or relating to the manufacture of chlorinated derivatives of 2:5-dihydrofuran |