GB302750A - Improvements in the manufacture of acyl derivatives of beta-ketonic esters and beta-diketones - Google Patents
Improvements in the manufacture of acyl derivatives of beta-ketonic esters and beta-diketonesInfo
- Publication number
- GB302750A GB302750A GB2647527A GB2647527A GB302750A GB 302750 A GB302750 A GB 302750A GB 2647527 A GB2647527 A GB 2647527A GB 2647527 A GB2647527 A GB 2647527A GB 302750 A GB302750 A GB 302750A
- Authority
- GB
- United Kingdom
- Prior art keywords
- derivatives
- acyl
- ethyl
- beta
- diketones
- 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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/45—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
302,750. Imperial Chemical Industries, Ltd., and Coffey, S. Oct. 6, 1927. Samples furnished. Acyl derivatives of #-diketones and #-ketonic esters are prepared by treating an alkali metal compound of the ketone with an organic carboxvlic acid anhydride. A mixture of the O-acyl and C-acyl derivatives is obtained, in which the C-acyl derivative predominates. The process is preferably affected in an inert solvent which is substantially insoluble in water, e.g. petroleum ether, ligroin, benzene or ether.-Examples are given of the preparation of ethyl diacetoacetate, ethyl propionylacetoacetate and ethyl butyrylacetoacetate from sodium ethyl acetoacetate and acetic, propionic and butyric anhydrides respectively. The C-derivatives are separated from the O-derivatives by extraction with dilute caustic soda until the extract is just alkaline to Clayton Yellow paper, or with potassium carbonate until the paper is no longer coloured, and acidifying the extract ; the 0-derivative, being insoluble in alkali, remains behind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2647527A GB302750A (en) | 1927-10-06 | 1927-10-06 | Improvements in the manufacture of acyl derivatives of beta-ketonic esters and beta-diketones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2647527A GB302750A (en) | 1927-10-06 | 1927-10-06 | Improvements in the manufacture of acyl derivatives of beta-ketonic esters and beta-diketones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB302750A true GB302750A (en) | 1928-12-27 |
Family
ID=10244221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2647527A Expired GB302750A (en) | 1927-10-06 | 1927-10-06 | Improvements in the manufacture of acyl derivatives of beta-ketonic esters and beta-diketones |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB302750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142692A (en) * | 1961-03-29 | 1964-07-28 | Eastman Kodak Co | Preparation of beta-keto esters |
-
1927
- 1927-10-06 GB GB2647527A patent/GB302750A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3142692A (en) * | 1961-03-29 | 1964-07-28 | Eastman Kodak Co | Preparation of beta-keto esters |
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