Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... (S)-(−)-N-acetyl-2-methoxycarbonylaziridine 1 undergoes easy ring-opening by Brønsted acids or nucleophiles in the presence of a Lewis acid catalyst. The regioselectivity is not always exclusive, affording optically active α- and β-aminoacids. ... Optically active (S)-(−)-1, ...