Abstract
Diketene-acetone adduct (2, 2, 6-trimethyl-1, 3-dioxin-4-one) 1 reacts with amide NH to give the corresponding N-acetoacetates 2. Formamide and basic amides such as picolinamide, on treatment with the adduct, are transformed to the N-acyl-2, 6-dimethyl-4-oxo-4H-pyran-3-carboxamide (4a and 4p) together with the corresponding N-acetoacetates.
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