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.
sec-
氨基二烯酯3与
乙酰乙酸酯(4)的反应生成了N-烷基3-乙酰-4-甲氧基羧甲基-2-甲基-1,4-
二氢吡啶5和烯胺6,提供了一种新的氮杂电环化反应。