hydrazones are highly functionalized, versatile molecules. A mild reduction of the coupling products can efficiently produce gem‐difluoromethylated β‐amino phosphonic acids and β‐amino acid derivatives. In mechanistic studies, a difluoroalkyl radical intermediate was detected by an EPR spin‐trapping experiment, indicating that a gold‐catalyzed radical pathway is operating.
据报道,使用容易获得的R F -Br试剂,gold的
金催化光氧化还原C(sp 2)-H二氟烷基化和hydr的
全氟烷基化。所得的宝石二
氟甲基化和
全氟烷基化的azo是高度官能化的多用途分子。偶合产物的轻度减少可以有效地生产出宝石-二
氟甲基化的β-
氨基膦酸和β-
氨基酸衍
生物。在机理研究中,通过EPR自旋捕获实验检测到二氟烷基自由基中间体,表明
金催化的自由基途径正在起作用。