The diastereoselective addition of organocerium and organolithium reagents to chiral α-alkoxy hydrazones is described. Three different alkoxy groups have been examined with three different types of nucleophilic reagents. With one exception, high yields and diastereoselectivities were observed with all combinations of reagents. While the chiral pyrrolidine auxiliary could be hydrogenolytically removed with Raney nickel, the resulting β-amino ethers suffered some epimerization.Nous decrivons l'addition diastereoselective de reactifs organoceriques et organolithies sur des α-alcoxyhydrazones chirales. Le comportement de trois differents groupes alcoxy vis-a-vis de trois types de reactifs nucleophiles a ete examine. A une exception pres, les trois reactifs etudies ont conduit a des rendements eleves et a de hautes diastereoselectivites. L'auxiliaire chiral de type pyrrolidine a pu etre recupere par clivage hydrogenolytique (nickel de Raney) de la liaison N-N. Les β-aminoethers ainsi obtenus ont cependant subi une legere epimerisation.