Chiral Bidiaziridines by a Two-Step Domino Aziridination of meso-α-Diimines.-The stereochemical outcome of the aziridination reaction of meso-α-diimines is investigated. Thus, chiral racemic α-diimines are tested with the aim to evaluate the possible effects of hindrance on the stereochemical outcome. The addition of water to the crude reaction mixture at the end of the amination allows the isolation of the minor isomer (IV). The structures of the products are identified by 2D-NMR techniques and a possible reaction pathway is discussed. -(ARESU, E.; CARROCCIA, L.; FIORAVANTI*, S.; GASBARRI, S.; PELLACANI, L.; SCIUBB, F.; Tetrahedron 69 (2013) 45, 9507-9511, http://dx.