FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method of synthesis of fluorinated aromatic compounds by heating chlorinated aromatic compound with fluorinating agent at 150 C. Synthesis is performed in sulfolan medium and mechanically activated KF and KCaF3 are used as fluorinating agents. Invention relates to also a method of synthesis of fluorinating agent KF by mechanical-chemical activation of potassium fluoride in high-intense grinding device at accelerating value of milling bodies 40-60g for 20-60 min. Invention relates to also a method of synthesis of fluorinating agent KCaF3 that involves treatment of equimolar mass of potassium fluoride and calcium fluoride in high-intense grinding device at accelerating value of milling bodies 60g for 60 min. EFFECT: enhanced degree of conversion of parent substance to end product, decreased consumption of fluorinating agent and reaction time. 4 cl, 1 tbl, 8 ex
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