Stereo- and regioselective ring opening of alkenyl aziridines with metal halides

The reaction of N-Boc-alkenyl aziridines with lithium halides in presence of Amberlyst 15 afforded the stereo- and regioselective ring-opened products in high yields. The following treatment of the bromo- and iododerivatives with silica gel produced the corresponding oxazolidin-2-ones.