Intramolecular Diels−Alder Cycloaddition ofN-Allyl-N-(2-furylmethyl)amides − First Step of a New Route Towards the Synthesis of a Densely Functionalized Pyrrolizidine Ring
作者:Franco Ghelfi、Andrew F. Parsons、Daniele Tommasini、Adele Mucci
DOI:10.1002/1099-0690(200105)2001:10<1845::aid-ejoc1845>3.0.co;2-i
日期:2001.5
The intramolecular Diels−Alder reaction of N-allyl-N-(2-furylmethyl)amides to exo-N-acyl-3-aza-10-oxatricyclo[5.2.1.01,5]dec-8-enes is described. The cycloaddition is controlled not only by the size of the amide appendage, but also by electronegativity of the amide. An example of a new approach towards the synthesis of a highly functionalized pyrrolizidine ring, which links this Diels−Alder cycloaddition
描述了 N-烯丙基-N-(2-呋喃基甲基)酰胺的分子内 Diels-Alder 反应生成 exo-N-acyl-3-aza-10-oxatricyclo[5.2.1.01,5]dec-8-enes。环加成不仅受酰胺附属物的大小控制,还受酰胺的电负性控制。报道了一种合成高度官能化吡咯里西啶环的新方法的例子,该方法将 Diels-Alder 环加成与卤素原子转移自由基环化联系起来。