Abstract
1. After alkylation of sodium acetylacetone with alkyliodides, individual 3-alkylacetylacetones were isolated from the reaction mixture and characterized. Our previous literature data pertained to substances containing an admixture of products of O-alkylation, 2. The NMR method was to determine the content of enol forms in the 3-alkylacetylacetones. 3. Alkylacetylacetones with unbranched substituents, according to the NMR data, contain cis-enol forms at equilibrium with the ketone, which agrees with the chemical data. Substances with branched substituents (3-iso-propylacetylacetone and 3-sec-butylacetylacetone) are almost pure ketones. The low enolization of these substances does not permit an assignment of the enol from to the cis-or trans-series by the NMR method.
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