alpha-Chloro-alpha'-(dibenzylamino) methylketones 3 are synthesized in enantiomerically pure form starting from alpha-amino acids. Reduction of amino ketones 3 and further epoxidation affords three aminoalkyl epoxides 6 with diastereoisomeric excess ranging between 94% and 98%. The synthesis of erythro amino epoxides 9 is also described by reaction of alpha-amino aldehydes 7 with in situ generated (halomethyl)lithium. Amino epoxides 9 were obtained with a diastereoisomeric excess ranging between 91% and 98%.