1-Alkyl-2-(bromomethyl) aziridines were transformed into 1-alkyl-2-(N-alkyl-N- ethylaminomethyl) aziridines upon treatment with 2–3 equiv. of methyllithium in THF or Et2O; the peculiarity in this transformation comprises the presence of an N-ethyl group in the end- products as well as the total number of carbon atoms, resulting from a highly unusual reaction course with a novel SN2′-type substitution at the aziridine moiety and liberation ...
