作者:Thomas A. Alanine、Warren R. J. D. Galloway、Thomas M. McGuire、David R. Spring
DOI:10.1002/ejoc.201402648
日期:2014.9
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。