Abstract
Trifluoroacetic anhydride was used as an efficient activator of the acylation of aryl methyl ketones with carboxylic acids in the presence of Bronsted and Lewis acids (SF3SO3H, MeSO3H, 4-MeC6H4SO3H·H2O, BF3·Et2O). In all cases, the products were the corresponding β-diketones. In the reactions in the presence of boron trifluoride–diethyl ether complex, the products were isolated as BF2-chelates with high yields.
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