An improved synthesis of a family of amino acids thatcontain ω-aminoalkyl groups and of a newfamily containing ω-carboxyalkyl groups linked to the α-amine isdescribed. The synthesis wasperformed by alkylation of suitably monoprotected alkylenediamines andprotected ω-amino acidswith triflates of α-hydroxy acid esters. The reaction proceededwith inversion of configurationyielding optically pure products. TheNα-(ω-aminoalkyl)amino acids andNα-(ω-carboxyalkyl)aminoacids were orthogonally protected to allow their incorporation intopeptides by solid-phase peptidesynthesis (SPPS) methodology.