γ-Aminobutyric acid (GABA)-sugar analogs in the form of C-ketosides can be prepared in 4 to 7 steps starting from d- or l-Glucono- and d-Galactono-1,5-lactone. The key step in the synthesis is the trimethylsilyl-trifluoromethanesulfonate (TMS-OTf) promoted C-glycosylation of 2-deoxy-3-ulopyranosonates with trimethylsilyl cyanide. Hydrogenation of the resulting β-cyano esters provides GABA-analogs, which are presented on a sugar scaffold.