Readily available 1-aza-1,3-butadienes (enimines) react with methyl acetoacetate and acetylacetone in the presence of catalytic amounts of lithium iodide to form in high yields unsymmetrically substituted 1,4-dihydropyridines or cyclohexenones. The reaction pathway depends on the structure of the enimine used. This divergence was not observed when the enimines were reacted with dimethyl 1,3-acetonedicarboxylate
在催化量的
碘化
锂存在下,易于获得的1-氮杂-
1,3-丁二烯(
亚胺)与
乙酰乙酸甲酯和
乙酰丙酮反应,以高收率形成不对称取代的1,4-
二氢吡啶或
环己酮。反应途径取决于所用
亚胺的结构。当
亚胺与1,3-
丙酮二
羧酸二甲酯反应以明显的立体选择性反应以优异的产率提供双环[3.3.1]
壬烷-3-酮衍
生物时,未观察到这种差异。