Selective deuteration over raney nickel in deuterium oxide: 1,6-anhydrohexoses

The relative rates of protium-deuterium exchange, catalysed by deuterated Raney nickel in deuterium oxide, in various positions of 1,6-anhydrohexopyranoses and -furanoses have been studied. Conditions have been found under which 1,6-anhydro-β- D -galactopyranose may be labelled on C-3 and 1,6-anhydro-α- D -galactofuranose on C-2.