4-dihydro-1-oxoisoindolines. 3a,4,4a,5-Tetrahydro-1(2H)-isoquinolone and 2,3,4,5,5a,6-hexahydro-1H-2-benzazepin-1-one derivatives are obtained similarly from the corresponding amides. These fused 1,3-cyclohexadiene systems reveal to be versatile synthetic intermediates for polycyclic compounds by cycloaddition reaction and for benzo-fused heterocycles by dehydrogenation. The stereochemistries in the successive
                                    由 2-pyrone-6-carbonyl chloride 和取代的
烯丙胺制备的 2-pyrone-6-carboxamides 自发发生分子内 Diels-Alder 反应,得到 3a,4,5,7a-tetrahydro-1-oxoisoindoline-5,7a -碳内酯,通过脱羧作用再生二烯部分,得到 3a,4-dihydro-1-oxoisoindolines。3a,4,4a,5-Tetrahydro-1(2H)-isoquinolone 和 2,3,4,5,5a,6-六氢-1H-2-benzazepin-1-one 衍
生物类似地从相应的酰胺中获得。这些稠合的 1,3- 环
己二烯系统显示出是
多环化合物通过环加成反应和苯并稠合杂环通过脱氢合成的通用中间体。还讨论了连续环加成反应中的立体
化学。