screening libraries, and, therefore, this scaffold has been poorly investigated. Herein, a new strategy is reported for the syntheses of these rare and biologically interesting 4H-quinolizin-4-ones. This modular route involves the regioselective N-alkylation of 6-halo-2-pyridones followed by a Stille cross-coupling, ring-closing metathesis, and palladium-catalyzed dehydrogenation reaction sequence. This
4H-quinolizin-4-one 支架具有重要的药学价值。预计这种杂环结构具有有吸引力的物理
化学性质,并存在于各种
生物活性分子中。尽管有这些有趣的特征,但 4H-quinolizin-4-ones 在当前的小
分子筛选库中的代表性不足,因此,对这种支架的研究很少。本文报道了一种合成这些稀有且具有
生物学意义的 4H-quinolizin-4-ones 的新策略。这种模块化路线涉及 6-卤代-2-
吡啶酮的区域选择性 N-烷基化,然后是 Stille 交叉偶联、闭环复分解和
钯催化的脱氢反应序列。