Eco-friendly molecular transformations catalyzed by a vitamin B₁₂ derivative with a visible-light-driven system

A new bio-inspired system composed of a vitamin B₁₂ derivative and Rose Bengal, catalyzed the dehalogenations of various toxic alkyl halides such as 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) via a noble-metal-free and visible-light-driven process. This system also catalyzed radical-involved organic reactions such as the 1,2-migration of acyl group via a tin-free process.