Dual Ce@g-C₃N₄-Photoredox/Chlorine Catalysis: Cross-Dehydrogenative Coupling of <i>N</i>-Heteroarenes and Alkanes/Ethers with H₂ Evolution

Abstract

With Ce@g-C 3 N 4 as a heterogeneous semiconductor photocatalyst, n Bu 4 NCl as both a redox catalyst and a hydrogen atom transfer catalyst, the first example of semiheterogeneous photocatalytic cross-dehydrogenative coupling of N -heteroarenes and alkanes/ethers with H 2 evolution was developed. Both a diverse array of high-value alkylated N -heteroarenes and clean H 2 can be efficiently coproduced under sacrificial reagent- and chemical oxidant/reductant-free conditions. Combining both the reversible Ce 4+ /Ce 3+ redox pair and the reversible Cl̅/Cl ̇ redox pair can considerably improve the photocatalytic efficiency.