Direct C2-trifluoromethylation of indole derivatives catalyzed by copper acetate
摘要:
Direct C2-selective trifluoromethylation of indole derivatives was achieved with Togni's hypervalent iodine reagent and CuOAc as a catalyst in MeOH under mild conditions, affording the desired C2-trifluoromethylated indoles in good yield (up to 90%). (C) 2010 Elsevier Ltd. All rights reserved.
Rapid trifluoromethylation of indole derivatives was achieved using trimethylsilyltriflate as the catalyst. Good to high yields were observed within only 5 min at room temperature. This reaction system is able to provide not only the mono-trifluoromethylated products, but also the di-trifluoromethylated derivatives, because of its high reaction efficiency.