Chemo-, Regio-, and Stereoselective Trifluoromethylation of Styrenes via Visible Light-Driven Single-Electron Transfer (SET) and Triplet–Triplet Energy Transfer (TTET) Processes
2014
Lin, Qing-Yu | Xu, Xiu-Hua | Qing, Feng-Ling
A process for tunable and chemo-, regio-, and stereoselective photocatalytic trifluoromethylation of styrenes was developed. Thermodynamically stable E-trifluoromethylated alkenes were prepared using Togni’s reagent in the presence of Ru(bpy)₃Cl₂·6H₂O under visible light irradiation, whereas less thermodynamically stable Z-trifluoromethylated alkenes were obtained by employing Umemoto’s reagent and photocatalyst Ir(ppy)₃.
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