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Site reactivity of some enolates derived from acetyl attached to the aromatic and heteroaromatic system with pentafluoropyridine and 4-phenylsulfonyl-2,3,5,6-tetrafluoropyridine under basic conditions in dry THF at reflux was investigated. The aromatic nucleophilic substitution of pentafluoropyridine with enolates occurs at the 4-position of pyridine ring by the oxygen site of enolate. In contrast,...
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