Isotopic labeling of the C-6 of a model glycosphingolipid (2S, 3R, 4E)-2-(1-adamantanacetamido)-3-hydroxy-4-octadecenyl-beta-D-galactopyranoside, GalCAda, is described. Oxidation of (2S, 3R, 4E)-2-(1-adamantanacetamido)-3-(benzoyloxy)-4-octadecenyl-2,3,4-tri-O-benzoyl-beta-D-galactopyranoside with o-iodoxybenzoic acid gave the dialdoside derivative in good yield. Reduction of the dialdoside with sodium borodeuteride gave the deuterium labeled D-GalCAda, with a cumulative yield of 35%.
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