yield. The bromine atom-transfer radical addition in benzene was not satisfactory. The addition proceeded smoothly in polar solvents such as DMF and DMSO, protic solvents such as 2,2,2-trifluoroethanol and 1,1,1,3,3,3-hexafluoro-2-propanol, and aqueous media. Ab initio calculations were conducted to reveal the origin of the solvent effect of water in the addition reaction. The polar effect of solvents
Light-Mediated Dual Phosphine-/Copper-Catalyzed Atom Transfer Radical Addition Reaction
作者:Oleg V. Fedorov、Sofya I. Scherbinina、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.joc.9b01649
日期:2019.9.6
The atomtransferradicaladdition reaction catalyzed by triphenylphosphine and copper(I) halide is described. The reaction proceeds under irradiation with 365 nm light using a light-emitting diode and was performed in regular glassware. The proposed mechanism involves the formation of quaternary phosphonium salt, which undergoes single electron reduction by copper(I) salt via photo-induced electron