(i-Pr)2NEt, the photo-induced cascade radical addition–cyclization–trapping reaction proceeded in aqueous media. When i-C3F7I was employed as a radical precursor, the iodine atom-transfer radical cyclization proceeded even in the absence of (i-Pr)2NEt. Under the photo-induced conditions, ICH2CN and ICH2CF3 also worked well as carbon radical precursors. The photo-induced reductive electron-transfer to CF3SO2Cl
在Ru(bpy)3 Cl 2 ·6H 2 O和(i -Pr)2 NEt存在下,光诱导的级联自由基加成-环化-捕集反应在水性介质中进行。当将i -C 3 F 7 I用作自由基前体时,即使不存在(i -Pr)2 NEt ,碘原子转移自由基的环化反应仍在进行。在光诱导条件下,ICH 2 CN和ICH 2 CF 3也可以作为碳自由基的前体。光诱导的还原电子转移至CF 3 SO 2Cl促进了氯原子转移自由基的环化。
Photocatalytic Cascade Carbon-Carbon Bond-Forming Radical Reaction in Aqueous Media
The ruthenium photocatalyst Ru(bpy)(3)Cl-2 center dot 6H(2)O has the potential to catalyze the cascade radical reaction with perfluoroalkyl radicals in aqueous media via two photoredox cycles.
Aqueous-Medium Carbon–Carbon Bond-Forming Radical Reactions Catalyzed by Excited Rhodamine B as a Metal-Free Organic Dye under Visible Light Irradiation
radical addition–cyclization–trapping reactions under visible light irradiation. In the presence of (i-Pr)2NEt, the electron transfer from the excited rhodamine B to perfluoroalkyl iodides proceeded smoothly to promote the carbon–carbonbond-forming radical reactions in aqueous media. When i-C3F7I was employed as a radical precursor, the aqueous-medium radical reactions proceeded even in the absence of
Polarity-Mismatched Addition of Electrophilic Carbon Radicals to an Electron-Deficient Acceptor: Cascade Radical Addition–Cyclization–Trapping Reaction
in the case of substrates 2–7, perfluoroalkyl radicals selectively added to an electron-deficient alkene moiety of 2–7, to give polarity-mismatched perfluoroalkylation products without the formation of regioisomers. Next, the control of enantioselectivity was studied. In the case of substrates 1 and 3, the reaction proceeded with good enantioselectivities by employing a chiral Lewis acid, prepared from