Convenient Synthesis of <i>N</i>-Benzyl-1,4-dihydropyridines, Cyclohexenones, and Bicyclo[3.3.1]nonan-3-one Derivatives from 1-Aza-1,3-butadienes
作者:Jon K. F. Geirsson、Jonina F. Johannesdottir
DOI:10.1021/jo960942f
日期:1996.1.1
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。