Scandium(III) triflate-catalysed ring opening of aziridines with phenol derivatives affords various 2-amino ethers 3 (eg 4-methyl- N-(2-phenoxy-2-phenylethyl) benzenesulfonamide) with high regioselectivity and high yields under solvent-free conditions. The unexpectedly rearranged product 4 (e.g. 4-methyl-N-(3-methyl-3-phenoxy butyl) benzene sulfonamide) was obtained when 2-isopropyl- N-tosylaziridine was the substrate.