PROCESS FOR PREPARING 2-SUBSTITUTED -5-TRIFLUOROMETHYL PYRIDINE

摘要

Title compds.(I; X = H, Cl; Y = F, Cl), useful as herbicides, were prepd. by the fluorination of compd. II(Z = halogen). Thus, 27.6 g 2-bromo-5-trichloromethylpyridine and 17.9 g antimony trifluoride were reacted at 150-180oC, and refluxed to give 5.3 g 2-fluoro-5-trifluoromethylpyridine(m.p. 115-120oC).