important indoline scaffold is provided with enantiomeric ratios of up to 98:2 in palladium(0)‐catalyzed C(sp3)–H activations of aryl triflates. The key is the combination of the electron‐rich monodentate Sagephos and the bulky 9H‐xanthene‐9‐carboxylic acid. Both participate in a highly cooperative manner in the enantiodetermining concerted‐deprotonation‐metalation step (see scheme, Tf=triflate).
联手:重要的二氢
吲哚骨架在
钯(0)催化的芳基
三氟甲磺酸酯的C(sp 3)–H活化中的对映体比率高达98:2 。关键是富电子的单齿鼠尾草和庞大的9 H-
蒽并9-9
羧酸的组合。两者都以高度合作的方式参与对映确定一致的去质子化
金属化步骤(参见方案,Tf = triflate)。