Abstract: Hydrazones behave as highly reactive species in the allylation under Barbier conditions. Nucleophilic addition of an alkyllithium to the carbonyl moiety of the glyoxal mono-hydrazone followed by indium-mediated allylation, leads in high yields to bisfunctionalized 1, 2-diols in a one-pot two-step reaction. Key words: glyoxal, hydrazone, indium, allylation, alkylation