Claims
- 1. In a process for the preparation of a pivaloylacetic acid ester by decarbonylation of a pivaloylpyruvic acid ester at an elevated temperature, the improvement which comprises subjecting pivaloylpyruvic acid ester to decarbonylation by heating the same in the presence of 0.01 to 5 percent by weight, relative to the total amount of the pivaloylpyruvic acid ester to be converted, of a metal in metallic and/or oxidic form, said metal being selected from the group consisting of copper, manganese, chromium and molybdenum, such that at most 30 percent of the total amount of the pivaloylpyruvic acid ester to be converted is heated and thereafter following the commencement of the reaction, adding the remaining amount of the pivaloylpyruvic acid ester to be converted according to the rate at which it is converted.
- 2. A process according to claim 1, wherein the metal is in an amount of 0.2 to 1% by weight.
- 3. A process according to claim 1 wherein said metal is copper.
- 4. A process according to claim 1 wherein said metal is manganese.
- 5. A process according to claim 1 wherein said metal is chromium.
- 6. A process according to claim 1 wherein said metal is molybdenum.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2945604 |
Nov 1979 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 200,695, filed Oct. 27, 1980, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2527306 |
Halverstadt |
Oct 1950 |
|
Non-Patent Literature Citations (2)
Entry |
House, Modern Synthetic Reactions, 2nd ed., 1972, pp. 747-750. |
Snyder et al., Organic Synthesis, 1943, col. vol. 2, pp. 531-534. |
Continuations (1)
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Number |
Date |
Country |
Parent |
200695 |
Oct 1980 |
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