Thioetherification via Photoredox/Nickel Dual Catalysis
作者:Matthieu Jouffroy、Christopher B. Kelly、Gary A. Molander
DOI:10.1021/acs.orglett.6b00208
日期:2016.2.19
Hypervalent alkylsilicates represent new and readily accessible precursors for the generation of alkylradicalsunder photoredox conditions. Alkylradicals generated from such silicates serve as effective hydrogen atom abstractors from thiols, furnishing thiyl radicals. The reactive sulfur species generated in this manner can be funneled into a nickel-mediated cross-coupling cycle employing aromatic
Zr-MOF-OH are utilized for photocatalytic arylhalide derivatizations. Phenoxy anions in binaphthol derivatives show high reducing capacity, remarkable activity, good selectivity and fair compatibility towards the activation of arylhalidesthrough a single-electron transfer process under white light irradiation and alkaline conditions. The generated aryl radicals could undergo biaryl cross-coupling