Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 166 10 Prague, Czech Republic; e-mail: 1 martinb@uochb.cas.cz, 2 zavada@uochb.cas.cz ... Synthesis of homochiral α-amino acids 3a–3e and bis(α-amino acid)s 4a–4e via BF3·Et2O- catalyzed ring-opening of methyl (S)-1-[(benzyloxy)carbonyl]aziridine -2-carboxylate (7) with oligo(ethylene glycol)s and subsequent acid hydrolysis is ...