GB720586A - Improvements in or relating to the production of oxazolidones - Google Patents
Improvements in or relating to the production of oxazolidonesInfo
- Publication number
- GB720586A GB720586A GB5316/53A GB531653A GB720586A GB 720586 A GB720586 A GB 720586A GB 5316/53 A GB5316/53 A GB 5316/53A GB 531653 A GB531653 A GB 531653A GB 720586 A GB720586 A GB 720586A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heated
- ethanolamine
- ester
- dissolved
- acid sulphuric
- 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
Landscapes
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
Oxazolidones-2 of the general formula <FORM:0720586/IV (b)/1> in which each of the symbols R and R1 represents hydrogen or a substituted or unsubstituted hydrocarbon radical are prepared by reacting an alkaline bicarbonate with an alkaline salt of an acid sulphuric ester of a substituted or unsubstituted ethanolamine. The term "alkaline" here includes ammonium. The salt of the acid sulphuric ester of ethanolamine may be formed in situ by neutralizing the acid ester with free alkali or an alkaline carbonate or bicarbonate. The reaction takes place in aqueous solution by heating slowly, e.g. to 40 DEG to 70 DEG C., and maintaining this temperature for 12 to 24 hours. Separation of the oxazolidone may be effected by filtering off the crystals of alkali sulphate which are formed, evaporating the solution to dryness and extracting with a solvent such as alcohol, benzene, dichlorethane or dichloroethylene. In examples (1) the acid sulphuric ester of ethanolamine dissolved in aqueous caustic soda is heated with sodium bicarbonate; (2) the acid sulphuric ester of ethanolamine is dissolved in aqueous ammonia and heated in a current of carbon dioxide; (3) the acid sulphuric ester of ethanolamine dissolved in water and potassium carbonate is heated with the addition of a supplementary addition of potassium bicarbonate; (4) the acid sulphuric ester of ethanolamine is heated with water and sodium bicarbonate; (5) the acid sulphuric ester of ethanolamine dissolved in sodium carbonate and water is heated with sodium bicarbonate; (6) the acid sulphuric ester of N-methylethanolamine is heated with water and sodium carbonate to give N-methyloxazolidone; (7) the sulphuric mono-ester of diethanolamine is dissolved in aqueous ammonia and carbon dioxide passed in while heating to give N-ethanoloxazolidone; and (8) the acid sulphuric ester of N-phenylethanolamine dissolved in soda lye is heated with sodium bicarbonate to yield N-phenyloxazolidone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR720586X | 1952-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720586A true GB720586A (en) | 1954-12-22 |
Family
ID=9093885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5316/53A Expired GB720586A (en) | 1952-02-25 | 1953-02-25 | Improvements in or relating to the production of oxazolidones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB720586A (en) |
-
1953
- 1953-02-25 GB GB5316/53A patent/GB720586A/en not_active Expired
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