| 초록 |
The visible light-driven photoredox catalysis serves as a valuable strategy for trifluoromethylation. However, the catalytic potentials are not fully utilized due to the requirement of high-energy photon sources for positive driving force for electron transfer. To address this challenge, we propose the catalytic sequence that employs oxalate (C2O42−) as a coreactant. The catalysis is initiated by one-electron oxidation of C2O42− (i.e., C2O42− → C2O4•− + e−) upon photoirradiation of low-bandgap photocatalysts, followed by spontaneous cleavage of the C–C bond (i.e., C2O4•− → CO2•− + CO2). The resulting radical anion of CO2 (CO2•−) possesses a high reduction power to enable electron transfer to CF3I as positive as 1.29 eV. Finally, the effectiveness of our catalytic protocols has been successfully demonstrated for a 1-undecene substrate. |
