<i>exo</i>-Selective Peripheral Cycloaddition Reactions of Pyrido[2,1-<i>a</i>]isoindole
作者:Shoji Kajigaeshi、Seiji Mori、Shizuo Fujisaki、Shuji Kanemasa
DOI:10.1246/bcsj.58.3547
日期:1985.12
Pyrido[2,1-a]isoindole cycloadds to olefinic dipolarophiles in a highly exo-selective fashion giving the kinetically controlled cycloadducts which gradually isomerize into the Michael adducts. With acetylenic dipolarophiles, the hydrogen-migrated cycloadducts are the only products. The mechanism of cycloadditions is discussed.
吡啶并[2,1-a]异吲哚环加成物以高度外向选择性的方式与烯烃偶极亲合体形成动力学控制的环加合物,该环加合物逐渐异构化为迈克尔加合物。对于炔属偶极体,氢迁移的环加合物是唯一的产物。讨论了环加成的机理。