Conclusions
The formation of 2,4,6-trifluoro-3,5-dichloropyridine by the reaction of pentachloropyridine with KF in MeCN, in the presence of catalytic amounts of an 18-crown 6-ester, proceeds at considerably lower temperatures and is not complicated by the presence of the reverse reaction.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 949–950, April, 1978.
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Akhmetova, N.E., Vlasov, V.M. & Yakobson, G.G. Reaction of pentahalo-substituted pyridines with potassium halides in presence of 18-crown 6-ester. Russ Chem Bull 27, 823–824 (1978). https://doi.org/10.1007/BF00925320
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DOI: https://doi.org/10.1007/BF00925320