Visible-light photoredox catalysis enabled bromination of phenols and alkenes
نویسندگان
چکیده
A mild and efficient methodology for the bromination of phenols and alkenes has been developed utilizing visible light-induced photoredox catalysis. The bromine was generated in situ from the oxidation of Br(-) by Ru(bpy)3 (3+), both of which resulted from the oxidative quenching process.
منابع مشابه
Dual gold and photoredox catalysis: visible light-mediated intermolecular atom transfer thiosulfonylation of alkenes.
Regioselective difunctionalization of alkenes has attracted significant attention from synthetic chemists and has the advantage of introducing diverse functional groups into vicinal carbons of common alkene moieties in a single operation. Herein, we report an unprecedented intermolecular atom transfer thiosulfonylation reaction of alkenes by combining gold catalysis and visible-light photoredox...
متن کاملVisible-light-induced hydroalkoxymethylation of electron-deficient alkenes by photoredox catalysis.
Hydroalkoxymethylation of electron-deficient alkenes using alkoxymethyltrifluoroborates by photoredox catalysis has been developed. Highly reactive alkoxymethyl radicals can be easily generated from oxidation of alkoxymethyltrifluoroborates via a visible-light-induced SET process.
متن کاملC-H functionalization of phenols using combined ruthenium and photoredox catalysis: in situ generation of the oxidant.
A combination of ruthenium and photoredox catalysis allowed the ortho olefination of phenols. Using visible light, the direct C-H functionalization of o-(2-pyridyl)phenols occurred, and diverse phenol ethers were obtained in good yields. The regeneration of the ruthenium catalyst was accomplished by a photoredox-catalyzed oxidative process.
متن کاملVisible-light-induced synthesis of a variety of trifluoromethylated alkenes from potassium vinyltrifluoroborates by photoredox catalysis.
A facile synthesis of trifluoromethylated alkenes by the radical-mediated trifluoromethylation of vinyltrifluoroborates has been developed. Togni's reagent serves as a CF(3) radical precursor in the presence of the photoredox catalyst [Ru(bpy)(3)](PF(6))(2) under visible light irradiation. This new photocatalytic protocol can be applicable to a wide variety of vinylborates containing electronic...
متن کاملSelective difluoroalkylation of alkenes by using visible light photoredox catalysis.
A visible light-induced process for selective difluoroalkylation of unactivated alkenes has been developed. The choice of base is crucial for governing the chemoselectivity of the process to produce difluoroalkylated alkanes and alkenes.
متن کامل