sulfones proceeded via two pathways. The first involves conjugate addition of the pyrrolidine to the acetylenic sulfone to afford a zwitterion, followed by dissociation of the C−N bond and recombination of the resulting carbocation and vinyl anion to afford the corresponding azepine derivative. The second comprises a cascade of conjugate addition, aza-Cope rearrangement and anionic 6π electrocyclic ring-closure
2-杂芳基取代的
吡咯烷与炔属砜的反应通过两个途径进行。第一个涉及将
吡咯烷共轭添加到炔属砜中以提供两性离子,然后将C-N键解离,然后将所得的碳正离子和
乙烯基阴离子
重组以提供相应的氮杂
环庚烷衍
生物。第二步包括级联共轭加成,氮杂-Cope重排和阴离子6π电环闭合步骤。由CN裂解形成的碳正离子中间体的稳定性决定了主要途径。