接近所有异构体:使用羧酸铑 (II) 催化剂可从邻位取代芳基叠氮化物中轻松获得一系列 α-、β- 和 δ-咔啉鎓离子(参见方案)。咔啉离子很容易被还原以提供色氨酸或去质子化以获取吡啶并吲哚。这种 [Rh II 2 ]-催化的 C H 键胺化用于合成 (±)-horsfiline 和新隐碱。esp=α,α,α',α'-四甲基-1,3-苯二丙酸酯。
we report a new synthetic strategy for 2-(pyridin-2-yl)phenols and 2-(pyridin-2-yl)anilines catalyzed by a Pd/C–ethylene system. The starting materials, 2-(pyridin-2-yl)cyclohexan-1-ones, can be easily prepared by the reaction of substituted pyridine N-oxide and cyclohexanones. The most useful feature of this method is that both 2-(pyridin-2-yl)phenols and 2-(pyridin-2-yl)anilines are easily synthesized
Merging Directed C–H Activations with High-Throughput Experimentation: Development of Iridium-Catalyzed C–H Aminations Applicable to Late-Stage Functionalization
作者:Erik Weis、Maria Johansson、Pernilla Korsgren、Belén Martín-Matute、Magnus J. Johansson