作者:Dale L. Boger、Satoshi Ichikawa、Hongjian Jiang
DOI:10.1021/ja002997b
日期:2000.12.1
A total synthesis of the rubrolone aglycon is detailed and is based on two key Diels−Alder reactions. The AB ring system incorporating a tetrasubstituted pyridine was assembled, enlisting the rare 4π participation of an O-alkyl α,β-unsaturated oxime in an intramolecular [4 + 2] cycloaddition reaction (70%). The C-ring oxygenated tropolone was introduced through a room-temperature, exo selective [4
详细介绍了红溴酮苷元的全合成,该合成基于两个关键的 Diels-Alder 反应。组装了包含四取代吡啶的 AB 环系统,在分子内 [4 + 2] 环加成反应 (70%) 中获得了罕见的 4π 参与 O-烷基 α,β-不饱和肟。C 环氧化托酚酮是通过环丙烯酮缩酮 (97%) 的室温外选择性 [4 + 2] 环加成反应引入的,然后原位生成降卡二烯和室温电环重排成适当取代的环庚三烯酮缩酮直接水解为 2,4-二羟基环庚三烯酮。