Claims
- 1. A process for the preparation of 2,4,5-trifluorobenzoyl fluoride, comprising reacting 2,4-dichloro-5-fluorobenzoyl chloride with potassium fluoride or with hydrofluoric acid prior to the reaction with potassium fluoride in a solvent at elevated temperature.
- 2. A process for the preparation of 2,3,4,5-tetrahalogenobenzene derivative of the formula ##STR51## in which R is --COCl or --COF,
- R.sup.1 is Cl or F, and
- R.sup.2 is Cl or F
- comprising reacting 2,3,4,5-tetrachlorobenzoyl chloride or 2,3,4,5-tetrachlorobenzoyl fluoride with potassium fluoride in a solvent at elevated temperature to yield a compound of said formula wherein R is --COF and thereafter optionally reacting said compound wherein R is --COF with SiCl.sub.4 to yield a compound of said formula wherein R is --COCl.
- 3. The process according to claim 2, wherein the reaction with SiCl.sub.4 is carried out in the presence of AlCl.sub.3.
Priority Claims (1)
Number |
Date |
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Kind |
34 20 796.1 |
Jun 1984 |
DEX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/284,331, filed Aug. 2, 1994, now allowed, which is a division of Ser. No. 07/968,603 filed Oct. 29, 1992 now U.S. Pat. No. 5,362,909; which is a division of Ser. No. 07/763,027 filed Sep. 20, 1991 now U.S. Pat. No. 5,200,548; which is a division of Ser. No. 07/459,876 filed Jan. 2, 1990 now U.S. Pat. No. 5,072,038; which is a continuation of Ser. No. 06/735,502 filed May 17, 1985, now abandoned.
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Divisions (3)
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Number |
Date |
Country |
Parent |
968603 |
Oct 1992 |
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Parent |
763027 |
Sep 1991 |
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Parent |
459876 |
Jan 1990 |
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Continuations (2)
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Number |
Date |
Country |
Parent |
284331 |
Aug 1994 |
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Parent |
735502 |
May 1985 |
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