Polyphosphoric Acid as a Reagent in Organic Chemistry. VII. Acylation1
HR Snyder, CT Elston
Index: Snyder; Elston Journal of the American Chemical Society, 1955 , vol. 77, p. 364
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Citation Number: 28
Abstract
The synthesis of ketones by intermolecular acylation with carboxylic acids in the presence of polyphosphoric acid is examined further. Thiophene and phenol are acetylated at 75', in good yields, but less reactive compounds like benzene and toluene react with aliphatic acids only under conditions vigorous enough to cause self-condensation of the resulting ketones. Fully aromatic ketones are more stable to polyphosphoric acid; toluene and ...
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