Preparation of 2-chloro-5-trifluoromethylpyridine and 2-chloro-5-perchlorofluoromethylpyridines
AssigneeImperial Chemical Industries PLC
InventorsNorman L. Roberts, Graham Whitaker
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Abstract
2-chloro-5-trifluoromethylpyridine or a 2-chloro-5-perchlorofluoromethylpyridine is prepared by chlorination of 3-trifluoromethylpyridine or a 3-perchlorofluoromethylpyridine respectively in the vapor phase at a temperature in the range from 100.degree. C. to 500.degree. C.
Claims4
A process for the preparation of 2,6-dichloro-3-trifluoromethylpyridine which consists essentially of vaporizing 3-trifluoromethylpyridine and chlorinating the vaporized 3-trifluoromethylpyridine by contacting the same in the vapour phase with gaseous chlorine at a temperature in the range from 400.degree. C. to 500.degree. C. using at least one mole of
Dependencies are inferred from the claim text.