Synthesis of 6-Chloro-5-(trifluoroacetyl)pyridine-3-carbonitrile: A Novel, Versatile Intermediate for the Synthesis of Trifluoromethylated Azaindazole Derivatives

SYNLETT(2019)

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Abstract
A synthesis of 6-chloro-5-(trifluoroacetyl)pyridine-3-carbonitrile, a versatile building block for the synthesis of trifluoromethylated N-heterocycles, is described. The reactions of 6-chloro-5-(trifluoroacetyl)pyridine-3-carbonitrile with 1,2- and 1,3-bisnucleophiles were investigated.
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Key words
pyridinecarbonitriles,pyrazolopyridines,trifluoromethylation,oxadiazoles,annulation
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