The reaction of lithium enolate derived from benzophenone imine of glycine ethylester 1 with allylic dihalides 2 in the presence of a catalytic amount of Pd(Ph(3))(4) (5% mol) affords the corresponding bis(imino esters) 3. Subsequent hydrolysis of compounds 3 gives the corresponding bis(alpha-amino acids) 4. This methododology has been used to synthesise alpha,alpha'-diaminosuberic acid.