Photochemical reductive homologation of hydrogen cyanide using sulfite and ferrocyanide

Photoredox cycling during UV irradiation of ferrocyanide ([FeII(CN)6]4-) in the presence of stoichiometric sulfite (SO32-) is shown to be an extremely effective way to drive the reductive homologation of hydrogen cyanide (HCN) to simple sugars and precursors of hydroxy acids and amino acids.

Photochemical reductive homologation of hydrogen cyanide using sulfite and ferrocyanide | Litlas