A Rapid Entry to Diverse γ-Ylidenetetronate Derivatives through Regioselective Bromination of Tetronic Acid Derived γ-Lactones and Metal-Catalyzed Postfunctionalization
作者:Nicolas Chopin、Hikaru Yanai、Shinya Iikawa、Guillaume Pilet、Jean-Philippe Bouillon、Maurice Médebielle
DOI:10.1002/ejoc.201500663
日期:2015.10
conditions. Some brominated materials were employed in representative Stille, Suzuki–Miyaura, and Sonogashira cross-coupling reactions to yield functionalized methyl and benzyl γ-ylidenetetronate derivatives. Compounds that resulted from the Sonogashira cross-coupling reactions were desilylated and converted into 1,2,3-triazole derivatives through a copper(I)-catalyzed 1,3-dipolar cycloaddition reaction with
通过在新的两步或三步醛醇缩合/脱水序列中将甲基和苄基四氢萘与(杂)芳基醛缩合,合成了一系列不同的甲基和苄基 γ-亚基四氢萘衍生物。在温和条件下发生甲基和苄基 γ-亚基内酯的溴化,以提供相应的 C-3-溴化 γ-不饱和内酯。二溴化和三溴化 γ-内酯的制备条件略有不同。在代表性的 Stille、Suzuki-Miyaura 和 Sonogashira 交叉偶联反应中使用了一些溴化材料,以产生功能化的甲基和苄基 γ-ylidenetetronate 衍生物。由 Sonogashira 交叉偶联反应产生的化合物被脱甲硅烷基化并通过铜 (I) 催化 1, 转化为 1,2,3-三唑衍生物。