A new approach to access difluoroalkylated diarylmethanes via visible-light photocatalytic cross-coupling reactions

Chem Commun (Camb). 2018 Apr 17;54(32):3993-3996. doi: 10.1039/c8cc01486h.

Abstract

Difluoroalkylated diarylmethanes with biological and pharmacological potentials were synthesized from para-quinone methides (p-QMs) and difluoroalkylating reagents via a visible light photocatalysis strategy. Mechanism studies showed that the excited photocatalyst, *fac-Ir(ppy)3, was primarily quenched by p-QMs and the generated diarylmethane radical intermediates then underwent a radical-radical cross-coupling reaction with difluoroalkyl radicals. This reaction features mild conditions, high efficiency and wide functional group compatibility.