Claims
- 1. A process for producing 5,6-dichloro-.beta.-trifluoromethylpyridine or 2,5,6-trichloro-.beta.-trifluoromethylpyridine which comprises reacting 6-chloro-.beta.-trifluoromethylpyridine or 2,6-dichloro-.beta.-trifluoromethylpyridine with chlorine gas to chlorinate the 5-position of the pyridine nucleus thereof:
- (1) at a temperature of 100.degree. C. to 250.degree. C. and at least sufficient amount of chlorine for the reaction;
- (2) in the presence of a catalyst of amount of at least 40% by weight (based on the 6-chloro or/and 2,6-dichloro-.beta.-trifluoromethylpyridine), the catalyst being chlorides of a metallic element selected from the group consisting of iron, tungsten, molybdenum, titanium, and antimony.
- 2. A process according to claim 1 wherein said amount of catalyst is in a range of 40% to 200% by weight based on the 6-chloro or/and 2,6-dichloro-.beta.-trifluoromethylpyridine.
- 3. A process for producing 5,6-dichloro-.beta.-trifluoromethylpyridine according to claim 1 which comprises reacting 6-chloro-.beta.-trifluoromethylpyridine with chlorine gas.
- 4. A process according to claim 3 wherein the reaction is carried out at a temperature of 100.degree. C. to 250.degree. C. in the presence of the catalyst of amount of at least 40% by weight based on said 6-chloro-.beta.-trifluoromethylpyridine.
- 5. A process according to claim 3 wherein the reaction is carried out at a temperature of 100.degree. C. to 250.degree. C., and in the presence of ferric chloride or antimony pentachloride as the catalyst at an amount of 40% to 200% by weight based on said 6-chloro-.beta.-trifluoromethylpyridine.
- 6. A process according to claim 3 wherein the catalyst is ferric chloride.
- 7. A process for producing 2,5,6-trichloro-.beta.-trifluoromethylpyridine according to claim 1 which comprises reacting 2,6-dichloro-.beta.-trifluoromethylpyridine with chlorine gas.
- 8. A process according to claim 7 wherein the reaction is carried out at a temperature of 100.degree. C. to 250.degree. C. in the presence of the catalyst of amount of at least 40% by weight based on said 2,6-dichloro-.beta.-trifluoromethylpyridine.
- 9. A process according to claim 7 wherein the reaction is carried out at a temperature of 100.degree. C. to 250.degree. C., and in the presence of ferric chloride or antimony pentachloride as the catalyst at an amount of 40% to 200% by weight based on said 2,6-dichloro-.beta.-trifluoromethylpyridine.
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-28826 |
Mar 1980 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 237,481, filed Feb. 23, 1981, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (5)
Number |
Date |
Country |
5064 |
Oct 1979 |
EPX |
1243196 |
Jun 1967 |
DEX |
55-2673 |
Jan 1980 |
JPX |
55-147261 |
Nov 1980 |
JPX |
2091718 |
Aug 1982 |
GBX |
Non-Patent Literature Citations (1)
Entry |
PCT Patent Publication GB 78/00008. |
Continuations (1)
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Number |
Date |
Country |
Parent |
237481 |
Feb 1981 |
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