Abstract The stereochemical course of the rearrangement of the N-sulfonylaziridines 5, 15, and 25 in the presence of s-BuLi/(−)-sparteine to the bicyclic sulfonamides 4, 16, and 17, respectively, has been investigated chemically and by X-ray structure analysis. The absolute configurations of the products were, in all cases, opposite to those of the alcohols formed upon rearrangement of the corresponding epoxides. Similarily, the allylic sulfonamide 10, ...
