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The reactions of sec-aminodienyl esters 3 with acetylacetone (4) afforded N-alkyl 3-acetyl-4-methoxycarbonylmethyl-2-methyl-1,4-dihydropyridines 5 and enamines 6, providing a new azaelectrocyclization reaction.

A New Synthesis of N-Alkyl 3-Acetyl-4-methoxycarbonylmethyl-2-methyl-1,4-dihydropyridines Utilizing sec-Aminodienyl Esters with Acetylacetone.