Rearrangement of the carbon skeleton of aldoses is catalysed by nickel(II) complexes
Abstract
Carbon-13 n.m.r. studies utilizing [1-13C]-D-glucose demonstrate that the apparent C-2 epimerization catalysed by [Ni(H2O)2(tmen)2]Cl2(tmen =N,N,N′-trimethylethylenediamine) in fact proceeds via a molecular rearrangement in which the C-1 carbon label is found at the C-2 position of the product mannose.