Heterocyclic polyfluoro-compounds. Part XXII. Synthesis of octafluoro-4,4′-azopyridine and tetrafluoro-4-(pentafluorophenylazo)pyridine
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 14,p. 1419-1420
- https://doi.org/10.1039/p19750001419
Abstract
Thermolysis of 4-azidotetrafluoropyridine in the presence of pentafluoroaniline yields tetrafluoro-4-(pentafluorophenylazo)pyridine and N-(pentafluorophenyl)-N′-(tetrafluoro-4-pyridyl)hydrazine; catalytic hydrogenation of the former product yields the latter, which decomposes into 4-aminotetrafluoropyridine, pentafluoroaniline, and the azo-compound at 160 °C in vacuo. Octafluoro-4,4′-azopyridine can be obtained by pyrolysis of 4-(dichloroamino)tetrafluoropyridine, prepared by treatment of 4-aminotetrafluoropyridine with t-butyl hypochlorite.Keywords
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