The generation of aryl radicals from corresponding aryl halides is considered as a difficult task in redox chemistry due their highly negative reduction potentials. Herein, we present quinacridinium radical as reducing photocatalysts for aryl halides. The estimated excited state oxidation potential of quinacridinium radical is -2.79 V vs SCE stipulates its highly photoreducing nature. The successful photoreductive dehalogenation of aryl halides are tested with variety of substrate in the presence of catalytic amount of quinacridinium cation under 440 nm irradiation. This quinacridinium radical is also demonstrated for photo-Arbuzov reaction, and corresponding aryl phosphonates is isolated in good yields. Additionally, this catalytic system is used in carbon-carbon and carbon-sulphur bond formation reactions.

Exploiting helicinium radical in photoredox catalysis as a photoreductant for aryl halides

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.